8360B/L Troubleshooting Guide

8360B/L Troubleshooting Guide
title.f5s Page i Tuesday, July 10, 2001 12:58 PM
Agilent Technologies
8360 B-Series Swept Signal Generator
8360 L-Series Swept CW Generator
Troubleshooting Guide
Serial Number Prefixes:
This manual applies to any instrument with the following model
number and serial number prefix combinations. You may have to
modify this manual so that it applies directly to your instrument
version. Refer to the “Instrument History” chapter.
Agilent Technologies 83620B/22B/23B/24B/30B
3844A and Below
Agilent Technologies 83640B/50B
4040A and Below
Agilent Technologies 83623L/30L
3844A and Below
Agilent Technologies 83640L/50L
4040A and Below
Part No. 08360-90124
Printed in USA
October 2000
Supersedes May 2000
Notice
The information contained in this document is subject to
change without notice.
Agilent Technologies makes no warranty of any kind
with regard to this material, including but not limited to,
the implied warranties of merchantability and tness
for a particular purpose. Agilent Technologies shall not
be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing,
performance, or use of this material.
Restricted Rights Legend
Use, duplication, or disclosure by the U.S. Government
is subject to restrictions as set forth in subparagraph (c)
(1) (ii) of the Rights of Technical Data and Computer
Software clause at DFARS 252.227-7013 for DOD
agencies, and subparagraphs (c) (1) and (c) (2) of the
Commercial Computer Software Restricted Rights clause
at FAR 52.227-19 for other agencies.
Certication
Warranty
Agilent Technologies certies that this product met its
published specications at the time of shipment from the
factory. Agilent Technologies further certies that its
calibration measurements are traceable to the United
States National Institute of Standards and Technology, to
the extent allowed by the Institute's calibration facility,
and to the calibration facilities of other International
Standards Organization members.
This Agilent Technologies instrument product is
warranted against defects in material and workmanship
for a period of one year from date of shipment. During
the warranty period, Agilent Technologies will, at its
option, either repair or replace products which prove to
be defective.
For warranty service or repair, this product must be
returned to a service facility designated by Agilent
Technologies. Buyer shall prepay shipping charges to
and Agilent Technologies shall pay shipping charges to
return the product to Buyer. However, Buyer shall pay all
shipping charges, duties, and taxes for products returned
to Agilent Technologies from another country.
Agilent Technologies warrants that its software and
rmware designated by Agilent Technologies for use with
an instrument will execute its programming instructions
when properly installed on that instrument. Agilent
Technologies does not warrant that the operation
of the instrument, or software, or rmware will be
uninterrupted or error-free.
Limitation of Warranty
The foregoing warranty shall not apply to defects
resulting from improper or inadequate maintenance
by Buyer, Buyer-supplied software or interfacing,
unauthorized modication or misuse, operation outside
of the environmental specications for the product, or
improper site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED.
AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS
THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE.
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THE REMEDIES PROVIDED HEREIN ARE BUYER'S
SOLE AND EXCLUSIVE REMEDIES. AGILENT
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DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER BASED ON
CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
Assistance
Product maintenance agreements and other customer
assistance agreements are available for Agilent
Technologies products. For any assistance, contact your
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c Copyright Agilent Technologies 1996, 1997, 1999, 2000
All Rights Reserved. Reproduction, adaptation, or
translation without prior written permission is prohibited,
except as allowed under the copyright laws.
1400 Fountaingrove Parkway, Santa Rosa CA, 95403-1799,
USA
Safety Notes
The following safety notes are used throughout this
manual. Familiarize yourself with each of the notes and
its meaning before operating this instrument.
WARNING
Warning denotes a hazard. It calls attention to a
procedure which, if not correctly performed or
adhered to, could result in injury or loss of life. Do
not proceed beyond a warning note until the indicated
conditions are fully understood and met.
CAUTION
Caution denotes a hazard. It calls attention to a
procedure that, if not correctly performed or adhered
to, would result in damage to or destruction of the
instrument. Do not proceed beyond a caution sign until
the indicated conditions are fully understood and met.
v
General Safety Considerations
WARNING
vi
These servicing instructions are for use by qualied
personnel only. To avoid electrical shock, do not
perform any servicing unless you are qualied to do
so.
The opening of covers or removal of parts is likely
to expose dangerous voltages. Disconnect the
instrument from all voltage sources while it is
being opened.
The detachable power cord is the instrument
disconnecting device. It disconnects the mains
circuits from the mains supply before other parts
of the instrument. The front panel switch is only a
standby switch and is not a LINE switch.
The power cord is connected to internal capacitors
that may remain live for 5 seconds after
disconnecting the plug from its power supply.
This is a Safety Class I product (provided with a
protective earthing ground incorporated in the
power cord). The mains plug shall only be inserted
in a socket outlet provided with a protective
earth contact. Any interruption of the protective
conductor, inside or outside the instrument,
is likely to make the instrument dangerous.
Intentional interruption is prohibited.
For continued protection against re hazard
replace line fuse only with same type and rating
(F 5 A/250 V). The use of other fuses or material is
prohibited.
CAUTION
Always use the three-prong ac power cord supplied
with this instrument. Failure to ensure adequate earth
grounding by not using this cord may cause instrument
damage.
Before switching on this product, make sure that the
line voltage selector switch is set to the voltage of the
power supply and the correct fuse is installed. Assure
the supply voltage is in the specied range.
Manual Conventions
4Front-Panel
Key5
NNNNNNNNNNNNNNNNNNNNNNN
Softkey
Screen Text
This represents a key physically located
on the instrument.
This indicates a \softkey," a key whose
label is determined by the rmware of
the instrument.
This indicates text displayed on the
instrument's screen.
vii
Instruments Covered By This Manual
This manual applies to instruments having a serial
number prex listed on the title page (behind the
\Documentation Map" tab). Some changes may have to
be made to this manual so that it applies directly to each
instrument; refer to Chapter 2, \Instrument History", to
see what changes may apply to your instrument.
A serial number label (see the gure) is attached to the
instrument's rear panel. A prex (four digits followed
by a letter), and a sux (ve digits unique to each
instrument), comprise the instrument serial number.
Typical Serial Number Label
viii
1
Troubleshooting
How to Use This Chapter
Menus
If you are not familiar with the menus in this instrument,
the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service Guide
contain fold-out menu maps which are located behind
the \Menu Maps" tab. Use the map for reference as you
troubleshoot.
Some menus have more than one page of softkeys. Select
the More softkey to see the next page of softkeys. More
is not included in the keystrokes given in this chapter.
NNNNNNNNNNNNNN
NNNNNNNNNNNNNN
Where to Begin Troubleshooting
Caution
Follow all troubleshooting procedures in the order given.
Done out of order, these procedures can miss critical
checks. You can waste time, and possibly replace the
wrong assembly.
Begin with \Instrument-Level Troubleshooting". This
section directs you to the appropriate troubleshooting
module.
Agilent 8360
Troubleshooting Introduction
1-1
Troubleshooting Modules
These modules pictorially guide you through the required
measurement steps (see the following example). Each
module covers one or more assemblies, and isolates a
problem to the assembly level.
Special Cases
This section covers problems not isolated in the
troubleshooting modules. \Special Cases" also contains an
instrument block diagram.
Troubleshooting Foldout
The troubleshooting foldout, referenced in the
troubleshooting modules, is located just prior to the
\Special Cases" tab.
1-2 Troubleshooting Introduction
Agilent 8360
Equipment Required
Table 1-1 lists recommended troubleshooting equipment.
You may use any equipment that meets the critical
specications listed.
Instruments Without a Front Panel Keyboard
If your instrument does not have a keyboard, there are
two ways you can troubleshoot it:
1. Use the front panel emulation software, as instructed
in instrument-level troubleshooting. The software
itself is documented in the \Automated Tests" chapter
of the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service
Guide.
2. Use a substitute front panel (to order, see \Replaceable
Parts," in the Agilent Technologies 8360 B-Series Swept
Signal Generator/L-Series Swept CW Generator Service
Guide).
Lifting the RF Deck Up Into the Service Position
In some of the troubleshooting procedures, you will be
required to lift the RF deck up into the service position.
Instructions for this procedure are documented in the
\Disassembly & Replacement Procedures" chapter of
the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service Guide
as part of the \RF Deck Disassembly & Reassembly"
procedure.
Agilent 8360
Troubleshooting Introduction
1-3
Table 1-1. Recommended Troubleshooting Equipment
Instrument
Critical Specications
Recommended
HP/Agilent Model or
PN
Digital Voltmeter
Range: 050 to +50 Vdc
Accuracy: 60.01%
Input Impedance: 10 M
3456A
3457A
Frequency Counter1
Range: 0.01 to 26.5 GHz
Accuracy:
Time base: 61 count
Aging Range: 5 x 10{10
5343A
Function Generator
Sine Wave Amp: 1 Vrms
Sine Wave Freq: dc to 100 kHz
3325A
Oscilloscope
Dual Channel
Bandwidth: dc to 300 MHz
Vert Sensitivity: 5 mV/Div
Horiz Sensitivity:
50 ns/Div
10 Magnier
Trigger: Event Triggerable
54111D
54110D
Oscilloscope Probes
10033A
Power Meter1
Power Range: 1 W to 100 mW
Accuracy: 60.01%
436A
437B
438A
Power Sensor
0.01 to 0.05 GHz
0.05 to 20 GHz
0.05 to 40 GHz
8481A
8485A
8487A
Service Accessory Kit2
1
2
08360-60060
May be replaced by a spectrum analyzer.
For ordering information, see \Replaceable Parts".
1-4 Troubleshooting Introduction
Agilent 8360
1a
Instrument Level Troubleshooting
ILT.000 Begin
Troubleshooting
Follow the instructions in this section in the order given.
The equipment required to troubleshoot the synthesizer
is listed in Table 1-1 in Chapter 1. You may use any
equipment that meets the critical specications listed.
Go to paragraph ILT.100
Agilent 8360
Instrument Level Troubleshooting 1a-1
ILT.100
Can you safely connect the instrument to line power?
Go To A16.000
ILT.101
Continue
Turn on line power and make the following observations
during power up:
The amber standby light goes o.
The green power-on light comes on.
The fan operates. Because the fan is very quiet, you
may need to feel for airow.
Is line power on and does the unit appear safe to
operate?
Go To A16.000
Continue
Does the amber standby light go o, the green power-on
light come on, and the fan operate?
Go To A16.000
1a-2 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.102
Does the synthesizer have a front panel with a display
and keyboard?
Go To ILT.5000
ILT.103
Continue
Enable factory preset:
1. Press SYSTEM 4MENU5.
2. Select Preset Mode Factory .
3. Press 4PRESET5.
Could you complete the factory preset?
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To ILT.6500
Agilent 8360
Continue
Instrument Level Troubleshooting 1a-3
ILT.104
Press 4PRESET5.
Start(MHz)
Stop(MHz)
Power(dBm)
10.000000 20000.000000
INT:
0.00
---------------------------------------
Compare the synthesizer display to the gure shown.
Stop and start frequencies may vary depending on the
synthesizer model number. Also, ashing messages may
appear on the front panel. These messages include (but
are not limited to) OVEN, UNLOCK, LOW UNLVLED, and
OVRMOD. Do not consider these messages failures at this
time.
Is the display correct?
Go To ILT.6500
ILT.105
Has a PC board or assembly recently been repaired or
replaced? (If the instrument has passed self-tests since
the assembly was replaced, answer this question \No").
Continue
ILT.106
Continue
Go To ILT.1000
Ensure that all external cables are removed from the
synthesizer and then perform a full self-test:
1. Press 4SERVICE5.
2. Select Selftest (Full) .
3. Wait about 1 minute for self-tests to run.
Continue with paragraph ILT.107.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1a-4 Instrument Level Troubleshooting
Agilent 8360
ILT.107
**** ALL SELF-TESTS HAVE PASSED ! ****
No failures were found in any of the
tests on the self-test list.
Abort
....Options....
Loop
Log Cont
At the end of self-test, if the display shows ALL
SELF-TESTS HAVE PASSED ! continue with ILT.108.
Otherwise, follow the directions displayed on the
synthesizer.
ILT.108
Were the self-tests run to conrm correct operation of
the synthesizer? For example, were self-tests run after a
repair, as a periodic check, or as part of a calibration?
Continue
Agilent 8360
Done
Instrument Level Troubleshooting 1a-5
ILT.109
Does the synthesizer have a front panel with a display
and keyboard, and do you want to test the display and
keyboard?
Go To ILT.111
Continue
Test the display by running self-test #257:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42575 4ENTER5.
4. Select Do Test #257 . To exit the test, press 4PRESET5.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Do marching characters and a fast-moving cursor ( )
appear on the display?
Go To A21.9000
1a-6 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.110
Test the keyboard by running self-test #21:
1. Press 4SERVICE5.
2. Select Selftest Menu .
3. Press 4215 4ENTER5.
4. Select Do Test #21 .
5. Turn the rotary knob on the front panel clockwise and
counter clockwise.
Do an X and a dash (-) ash in the upper right corner of
the display?
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To ILT.6000
Continue
Press all keys on the front panel except 4PRESET5.
Do all dashes (-) change to Xs?
Go To A1.9000
Agilent 8360
Continue
Instrument Level Troubleshooting 1a-7
ILT.111
If a password is set, you must know it to do this step.
View calibration constant #463 (hardware conguration):
1. Press 4PRESET5 4SERVICE5.
2. Select Adjust Menu .
3. If ENTER PASSWORD: 0 appears on the top line of the
display:
a. Enter the password.
b. Press 4ENTER5.
c. Select Adjust Menu .
4. Select Calib Menu Select Cal .
5. Press 44635 4ENTER5.
6. Note the value of calibration constants #463 and #464.
7. Note the options listed on the rear panel of the
instrument.
8. Note the model number of the instrument.
9. Using the options listed on the rear panel, the model
number, and the table below, calculate the hardware
conguration calibration constants (see the following
examples).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1a-8 Instrument Level Troubleshooting
Agilent 8360
Table 1a-1.
Hardware Conguration Cal Constants #463 and #464
Agilent Synthesizer
Model
Number
1
#463 Hardware
#464 Hardware
Cong 1
Cong 2
Starting Option Option Option Option Option Starting Option
Cal Constant 001 002 004 006 H101 Value 006
+4
+4096
+2
{
+1
+2
+4
+4096
+2
{
+1
+2
+4
+4096
0127
+1
+2
+4
+4096
06
06
{
+1
+2
+4
+4096
+2
{
+1
+2
+4
+4096
+2
0127
+1
+2
+19,888
0128
0128
0128
0128
0128
0128
0128
+4
+4096
+2
{
+1
+2
83621B
+30,864
{
{
{
{
{
{
{
83631B
+30,864
{
{
{
{
{
{
{
83651B
+32,176
{
{
{
{
{
{
{
83623L
+27,792
{
+4096
{
{
+1
{
83630L
+27,792
{
+4096
{
{
+1
{
83640L
+27,824
{
+4096
{
{
+1
{
83650L
+28,080
0128
0128
0128
0128
{
+4096
{
{
+1
{
83620B
+19,600
83622B
+19,584
83623B
+19,608
83624B
+19,592
83630B
+19,600
83640B
+19,632
83650B
Option H10 and all other options are mutually exclusive.
Example: Calibration constant #463
HP 83620B + 001 + 004 = ?
19,600
- 128 + 4096 = 23,568
Is the synthesizer hardware conguration number
correct?
Go To ILT.7000
Agilent 8360
Continue
Instrument Level Troubleshooting 1a-9
ILT.112
Does the synthesizer have a user preset implemented?
Continue
ILT.113
Were self-tests run because an adjustment failed?
Continue
ILT.114
Go To ILT.7100
Go To ILT.2000
If a FAULT message is displayed, check the Fault Menu.
Does a RAMP fault exist?
Continue
1a-10 Instrument Level Troubleshooting
Go To A14.9000
Agilent 8360
ILT.115
Perform the following calibration:
1. Press 4PRESET5 4USER CAL5.
2. Select FullUsr Cal .
3. Wait for the calibration to complete ( 1 minute).
If the calibration runs without errors, continue with
ILT.115. Otherwise, go to performance tests and
adjustments.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ILT.116
Were self-tests run because of a faulty signal at one or
more of the I/O ports listed below?
* Display Out
* Keyboard In
* GPIB In/Out
* 10 MHz Ref In
* 10 MHz Ref Out
* Trigger In
* Sweep Out
* Stop Sweep In/Out
* AM In
* Volts/GHz Out
* FM In
* Z-Axis Blanking/Markers Out
* Pulse In/Out
* Rear Panel SMI
* External ALC In
* Front Panel SMI
* RF Out
* Trigger Out
* Auxiliary Int
* GPIB Switches
* Pulse Video Out
* AM/FM Out
* Pulse Sync Out
* AUX OUTPUT
Continue
Agilent 8360
Go To ILT.3000
Instrument Level Troubleshooting 1a-11
ILT.117
Do all of the following work properly?
Power level functions:
RF on/o.
Power sweep.
Power slope.
Attenuator uncoupling.
Up/down power size.
Setting frequencies (start, stop, CW, etc.):
Up/down size.
Frequency oset.
Frequency multiplier.
Marker functions.
Sweep functions:
List.
Step:
Step size.
Step points.
Step dwell.
Step sweep trigger.
Sweep ramp.
Frequency list.
Fast sweep time ( 100 ms sweep time).
Slow sweep time ( 5 s sweep time).
Single sweep or manual sweep.
Trigger sweep.
Trigger out delay.
Save/recall registers.
Go To ILT.4000
1a-12 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.118
Did one or more of the following performance tests fails
(or do you believe they would have)?
* Internal Timebase
Aging Rate
* Spurious Signals
(Harmonics)
* Frequency Switching Time
* Power Accuracy
* Power Flatness
* Maximum Leveled Power
* External Leveling
* Swept Frequency Accuracy
* Step Attenuator
Flatness and Accuracy
* Spurious Signals
(Line Related)
* Single Sideband
Phase Noise
* Spurious Signals
(Non-Harmonics)
* FM Maximum Frequency
Deviation
* Pulse Modulation
Video Feedthrough
* AM Accuracy
* Pulse Performance
* AM Dynamic Range
* FM Accuracy
* AM Flatness
* FM Flatness
* Pulse On/O Ratio
* Internal Pulse Accuracy
* Modulation Meter
Continue
ILT.119
Were self-tests run because of a failure associated with a
source module?
Continue
Agilent 8360
Go To ILT.2500
Go To ILT.7500
Instrument Level Troubleshooting 1a-13
ILT.120
Were self-tests run because of a network or scalar
analyzer system failure?
Continue
ILT.121
Are all failures gone?
Continue
ILT.122
Go To ILT.8000
Done
You have encountered a problem not dealt with by
these procedures. Consult the \Special Cases" section to
troubleshoot this problem.
1a-14 Instrument Level Troubleshooting
Agilent 8360
ILT.1000
Calibration constants are used to identify which assembly
revisions are installed in the instrument. General
instrument operation, as well as self-test operation, are
dependent on these calibration constants being correct.
If a password is set, you must know it to do this step.
To view calibration constant #xxx:
1. Press 4PRESET5 4SERVICE5.
2. Select Adjust Menu .
3. If ENTER PASSWORD: 0 appears on the top line of the
display:
a. Enter the password.
b. Press 4ENTER5.
c. Select Adjust Menu .
4. Select Calib Menu Select Cal .
5. Press xxx 4ENTER5.
6. Note the value of calibration constant xxx.
7. Compare it with the calibration constant value listed
in the following table for the assembly installed in the
instrument.
8. If necessary, update and save the calibration constant:
a. Select Modify Cal .
b. Enter the correct value and press 4ENTER5.
c. Select Cal Util Menu .
d. Select Save and answer Yes .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNN
Go To ILT.106
Agilent 8360
Instrument Level Troubleshooting 1a-15
Table 1a-2.
Assemblies and Corresponding Cal Constant ID
Numbers and Revisions
Assembly ID Number Revision Part Number
A1
None
A8
None
A9
#671
1
1
#678
1
#493
0
#493
0
#495
0
#496
1
#497
1
#498
1
#499
0
1
#500
0
#501
0
0
#502
0
A2
None
A3
None
A4
None
A5
None
A6
None
A7
None
0
0
A11
None
A12
#672
1
None
#503
0
#504
0
#505
3
4
A10
A13
1a-16 Instrument Level Troubleshooting
Description
08360-60001 Keyboard
08360-60002 Source Module Interface
08360-60003 Front Panel Processor
08360-60295 Fractional{N
08360-60209 YO Phase Detector
08360-60214 Sampler (No VCO Adj.)
08360-60008 Reference
Future Use
08360-60166 Modulation Generator
08360-60292 Pulse B
08360-60232 Pulse (Self Bias SRD)
08360-60206 ALC (83640B/L and
83650B/L/23L/50L)
08360-60222 ALC (83620B/22B/24B,
83623B/L, and 83630B/L)
08360-60011 FM Driver
08360-60212 Multiplier/Filter Driver
08360-60213 YO Driver (Quick Step)
08360-60207 YO Driver (83621B/31B/51B)
Agilent 8360
Table 1a-2.
Assemblies and Corresponding Cal Constant ID
Numbers and Revisions (continued)
Assembly ID Number Revision Part Number
A14
A15
None
A16
None
A17
None
A18
None
A19
None
A20
Agilent 8360
None
A21
#670
0
None
A22
None
A23
None
A24
None
A25
None
A26
None
A27
None
#506
0
#507
1
#508
0
#509
0
#510
0
#511
0
#512
2
#513
0
#514
0
#515
0
#641
0
#642
1
#643
0
#644
0
Description
08360-60014 Sweep Generator
08360-60264 CPU (Battery) 2 ROM Chip Set
08360-60016 Post Regulator
08360-60017 Rectier/Filter
08360-60198 Switching Regulator
08360-60019 Rear Panel Interface
08360-60266 RF Interface
1990-1295
Alphanumeric Display
08360-60196 Motherboard
10811E
5086-7463
10 MHz Reference Standard
Low Band
Directional Coupler
5086-7515
YO
Instrument Level Troubleshooting 1a-17
Table 1a-2.
Assemblies and Corresponding Cal Constant ID
Numbers and Revisions (continued)
Assembly ID Number Revision Part Number
A28
A29
A30
A31
#673
1
2
#645
0
1
5086-7596
5086-7622
2
2
5086-7622
#674
1
#646
1
5086-7623
2
1
5086-7636
3
4
None
0
1
#647
0
5086-7616
5086-7637
0
5086-7645
0
0
0955-0125
5086-7656
0
#648
0
0955-0523
None
0
0
1a-18 Instrument Level Troubleshooting
0955-0148
Description
Switched Amp/Mult (83621B/31B)
Amp/Mult (83630B/L
and 83650B/L)
Amp/Mult with Aux Out (83620B,
83622B, 83623B/L, 83624B,
83640B/L, and 83651B)
Amp/Filter
(83630B/L, 83640B/L,
83650B/L, and 83651B)
Amp/Filter
(83630B/40B/50B Option 006)
Amp/Filter (83620B/22B/23B/24B)
Amp/Filter (83623L)
Directional Coupler
(83623B/L and 83624B)
Bridge Detector
(83620B/22B and 83630B/L)
Directional Coupler (83631B)
Bridge Detector
(83640B/L and 83650B/L)
Directional Coupler (83651B)
33326-60003 Step Attenuator (83620B/22B/24B,
83623B/L, and 83630B/L)
33326-60002 Step Attenuator (83640B/L)
33326-60005 Step Attenuator (83650B/L)
Agilent 8360
Table 1a-2.
Assemblies and Corresponding Cal Constant ID
Numbers and Revisions (continued)
Assembly ID Number Revision Part Number
A32
A33
#677
0
1
1
None
#649
1
1
1
#650
0
0
A34
None
A35
None
A36
#676
#651
0
0
#652
0
#653
0
A37
A38
Agilent 8360
Description
5086-7607
5086-7604
5086-7513
Frequency Doubler (83640B/L)
Frequency Doubler (83650B/L)
Frequency Doubler (83651B)
5086-7465
5086-7510
Amplier (High Power) (83623B)
Amplier (High Power) (83624B)
08360-60061 RP Floating BNC (Option 004)
08360-60186 RP Floating BNC (Option 002 and 004)
Not Used
Not Used
#675
1
#655
0
5086-7602
2
0
5086-7634
2
0
5087-7017
Dual Modulator (83620B,
83622B, 83623B/L,
83624B, 83630B/L,
83640B/L, and 83650B/L)
AM Modulator
(Option 006 and 83621B/31B/51B)
Mod Doubler Amp
(83630L/40L/50L)
Instrument Level Troubleshooting 1a-19
Table 1a-2.
Assemblies and Corresponding Cal Constant ID
Numbers and Revisions (continued)
Assembly ID Number Revision Part Number
A42
#676
0
#653
0
1
1
0
1
5086-7628
0
1
5086-7629
1
1
5086-7630
1
1
5086-7631
1a-20 Instrument Level Troubleshooting
Description
(83620B/22B/24B
and 83623B/L)
(83630B/L, 83640B/L,
and 83650B/L)
Pulse Mod Switched Filter
(83620B/22B Option 006)
Pulse Mod Switched Filter
(83623B/24B Option 006)
Pulse Mod Switched Filter
(83630B Option 006)
Pulse Mod Switched Filter
(83640B/50B Option 006)
Agilent 8360
ILT.2000
Select the failing adjustment and go to the indicated
paragraph.
Failed Adjustment
ADC Calibration
10 MHz Standard
Sweep Ramp
YO Driver +10V Reference
Modulation Generator
Sampler Assembly
YO Loop Gain
YO Driver Gain and Linearity
YO Delay
FM Gain
FM Gain, Opt. 002 installed
Modulator Oset and Gain
AM Delay
AM Delay, Opt. 002 installed
AM Accuracy
AM Accuracy, Opt. 002 installed
Power Flatness
ALC Power Level Accuracy
SYTM Tracking and Delay Compensation
Low Power SRD Bias
Square Wave Symmetry
Step Attenuator Flatness
Agilent 8360
Go to Paragraph
A15.9000
A23.9000
A14.9000
A13.9000
A8.9000
ILT.2010
A5.9000
ILT.2030
ILT.2030
ILT.2100
ILT.2140
ILT.2110
ILT.2130
ILT.2150
ILT.2130
ILT.2150
ILT.2240
ILT.2240
RF.2890
RF.2890
A9.9000
ILT.2300
Instrument Level Troubleshooting 1a-21
ILT.2010
Set up for power measurement:
1. Set the power switch to standby.
2. Remove the top and bottom covers.
3. Turn the synthesizer power on.
4. Press 4PRESET5 4CW5 4SERVICE5.
5. Select Tools Menu CntlPLL Menu NoPhaseLock
(asterisk on).
6. Select LoopCntl Menu YO Loop Freq .
7. Press 425 4GHz5.
8. Using the rotary knob, sweep the frequency from
2.0 to 7.4 GHz and verify that power is greater than
025 dBm.
Set up for frequency measurement:
1. Press 425 4GHz5.
2. Using 485, increment the frequency.
3. The measured frequency equals the front panel
indication 6 40 MHz (2.0 to 7.4 GHz).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
1a-22 Instrument Level Troubleshooting
Go To ILT.2015
Agilent 8360
ILT.2011
Set up for power measurement:
1. Reconnect any disconnected cables.
2. Put the RF deck in the service position.
3. Remove the 15 dB attenuator (AT3) from the
directional coupler (A39).
4. Press 4PRESET5 4CW5 4SERVICE5.
5. Select Tools Menu CntlPLL Menu NoPhaseLock
(asterisk on).
6. Select LoopCntl Menu YO Loop Freq .
7. Press 425 4GHz5.
8. Using the rotary knob, sweep the frequency from
2 to 7.4 GHz and verify that power is 07 dBm.
Set up for frequency measurement:
1. Press 425 4GHz5.
2. Using 485, increment the frequency.
3. The measured frequency equals the front panel
Indication 6 40 MHz (2 to 7.4 GHz).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Agilent 8360
Go To ILT.2020
Instrument Level Troubleshooting 1a-23
ILT.2012
Set up for power measurement:
1. Reconnect any disconnected cables.
2. Put the RF deck in the service position.
3. Remove W52 (connects the YIG oscillator, A26, to the
directional coupler (A39).
4. Press 4PRESET5 4CW5 4SERVICE5.
5. Select Tools Menu CntlPLL Menu NoPhaseLock
(asterisk on).
6. Select LoopCntl Menu YO Loop Freq .
7. Press 425 4GHz5.
8. Using the rotary knob, sweep the frequency from
2.0 to 7.4 GHz and verify that power is 8 dBm.
Set up for frequency measurement:
1. Press 425 4GHz5.
2. Using 485, increment the frequency.
3. The measured frequency equals the front panel
indication 6 40 MHz (2.0 to 7.4 GHz).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To RF.2690
1a-24 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.2013
Check W52 for damage, deformation, or excessive RF
path loss.
Is W52 defective?
Go To RF.3990
Continue
Replace W52 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.2015
Remove A6 from the synthesizer and disconnect W54
from A6. Inspect and test W54 for defects.
Is W54 defective?
Go To A6.9000
Continue
Replace W54 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
Agilent 8360
Instrument Level Troubleshooting 1a-25
ILT.2020
There is a high-loss path between the directional coupler
(A39) and the sampler (A6). This path includes two
hard lines (W54, W51), a low pass lter (FL2), and
an attenuator (AT3). The most likely failure is a poor
connection. Correct the faulty connection or replace the
faulty part (W54, FL2, W51, AT3). Isolate and replace the
faulty component and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
To check for excessive loss in a cable or lter, connect
the component input to a known-good signal for the
frequency bands in question (see the block diagram
located behind the \Troubleshooting Block Diagrams" tab)
and test the output. Over the frequency range of 2.0 to
8.0 GHz, the loss for a coaxial cable should be 2.0 dB;
the loss for a lter should be 4.0 dB.
ILT.2030
The most likely cause of this failure is A26, the YIG
oscillator (go to RF.2690). If replacing A26 does not
resolve the problem, it is possible (but less likely) that
A13, the YO driver assembly could be the cause. Go to
A13.9000 to replace A13.
1a-26 Instrument Level Troubleshooting
Agilent 8360
ILT.2100
Check the continuity from the front or rear panel FM
input to the end of W8 (which connects to A11J1).
Go To ILT.2105
ILT.2101
Continue
Perform the following setup:
1. Reconnect all cables.
2. Set the power switch to standby.
3. Put the RF deck in the service position.
4. Disconnect W26 from A26J3.
5. Connect an oscilloscope to the disconnected end of
W26.
6. Connect a function generator to the FM input on the
front (or rear) panel.
7. Turn synthesizer power on.
8. Set the function generator for a 0.25 V rms sine wave
at 1.0 MHz.
9. Press 4PRESET5 4CW5 45.05 4GHz5 4MOD5.
10. Select FM On/Off AC .
11. Set the FM sensitivity to 10 MHz/V.
12. Adjust A11R55 to adjust the amplitude of the
waveform.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Agilent 8360
Instrument Level Troubleshooting 1a-27
The oscilloscope should display an undistorted waveform
approximately 3.2 V rms (9 Vp-p). Try adjusting A11R55.
There should be some range of adjustment above and
below this level.
Go To A11.9000
Go To RF.2690
ILT.2105
Replace W8 (front or rear panel FM input to A11J1) and
go to the Troubleshooting Foldout, block 1 (located just
prior to the \Special Cases" tab).
ILT.2110
Does the adjustment (modulator oset and gain) fail
above 2 GHz?
Go To ILT.2115
1a-28 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.2111
Does the adjustment (modulator oset and gain) fail
below 2 GHz?
Go To ILT.2120
Agilent 8360
Continue
ILT.2112
The problem is most likely the A10 assembly (it is
possible, however, that A24 and A38 are both faulty).
First go to paragraph A10.9000. If this does not x the
problem, consider RF.2490, and/or RF.3890.
ILT.2115
The problem is most likely either the A24 or the RF
cables connected to A24. It is possible, however, that the
A10 assembly may be the problem.
If A24 has not been replaced, go to RF.2490, otherwise go
to A10.9000.
ILT.2120
The problem is most likely either A38 or the RF cables
connected to A38. It is possible, however, that the A10
assembly may be the problem.
If A38 has not been replaced, go to RF.3890, otherwise go
to A10.9000.
ILT.2130
The most likely cause of this problem is the A10
assembly. If this assembly has not been replaced, go to
A10.9000. If this assembly has been replaced, consider
changing the dual modulator (RF.3890) or, for instruments
with Option 006, change the AM modulator (RF.3890).
However, if the problem exists only in low band, try
changing the low band assembly (RF.2490).
Instrument Level Troubleshooting 1a-29
ILT.2140
Check the continuity from the front (or rear) panel FM
input to the end of W8 (which connects to A8J10).
Go To ILT.2145
1a-30 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.2141
Perform the following setup.
1. Reconnect all cables.
2. Set the power switch to standby.
3. Disconnect W68 from A11J1.
4. Connect an oscilloscope to the disconnected end of
W68.
5. Connect a function generator to the FM input on the
front (or rear) panel.
6. Turn synthesizer power on.
7. Set the function generator for a 0.25 V rms sine wave
at 1.0 MHz.
8. Press 4PRESET5.
The oscilloscope should display the same signal as the
function generator, a sine wave approximately 0.25 V rms
(.707 V p-p) at 1.0 MHz.
Continue
Agilent 8360
Go To ILT.2101
Instrument Level Troubleshooting 1a-31
ILT.2142
Perform the following setup:
1. Reconnect all cables.
2. Set the power switch to standby.
3. Disconnect W68 from A8J9.
4. Connect an oscilloscope to the A8J9 connector.
5. Connect a function generator to the FM input on the
front (or rear) panel.
6. Turn on synthesizer power.
7. Set the function generator for a 0.25 V rms sine wave
at 1.0 MHz.
8. Press 4PRESET5.
The oscilloscope should display the same signal as the
function generator, a sine wave approximately 0.25 V rms
(.707 V p-p) at 1.0 MHz.
Go To A8.9000
Go To ILT.2146
ILT.2145
Replace W8 (front or rear panel FM input to A8J10) and
go to the Troubleshooting Foldout, block 1 (located just
prior to the \Special Cases" tab).
ILT.2146
Replace W68 (cable between A8J9 and A11J1) and go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
1a-32 Instrument Level Troubleshooting
Agilent 8360
ILT.2150
Check the continuity from the front (or rear) panel AM
input to the end of W7 (which connects to A8J7).
Go To ILT.2155
Agilent 8360
Continue
Instrument Level Troubleshooting 1a-33
ILT.2151
Perform the following setup:
1. Reconnect all cables.
2. Set the power switch to standby.
3. Disconnect W67 from A10J1.
4. Connect an oscilloscope to the disconnected end of
W67.
5. Connect a function generator to the AM input on the
front (or rear) panel.
6. Turn on synthesizer power.
7. Set the function generator for a 0.25 V rms sine wave
at 1.0 MHz.
8. Press 4PRESET5.
The oscilloscope should display the same signal as the
function generator, a sine wave approximately 0.25 V rms
(.707 V p-p) at 1.0 MHz.
Continue
1a-34 Instrument Level Troubleshooting
Go To ILT.2130
Agilent 8360
ILT.2152
Perform the following setup:
1. Reconnect all cables.
2. Set the power switch to standby.
3. Disconnect W67 from A8J8.
4. Connect an oscilloscope to the A8J8 connector.
5. Connect a function generator to the AM input on the
front (or rear) panel.
6. Turn on synthesizer power.
7. Set the function generator for a 0.25 V rms sine wave
at 1.0 MHz.
8. Press 4PRESET5.
The oscilloscope should display the same signal as the
function generator, a sine wave approximately 0.25 V rms
(.707 V p-p) at 1.0 MHz.
Go To A8.9000
ILT.2155
Agilent 8360
Go To ILT.2156
Replace W7 (front or rear panel AM input to A8J7) and
go to the Troubleshooting Foldout, block 1 (located just
prior to the \Special Cases" tab).
Instrument Level Troubleshooting 1a-35
ILT.2156
Replace W67 (cable between A8J8 to A10J1) and go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
ILT.2240
The most common problem with RF power is loose or
damaged connectors and coax cables (especially hard
lines on the RF deck). If the instrument has sudden drops
in power above 10 GHz, check for faulty connections.
Check all hard lines, making sure that none of the
cables are cross-threaded, canted, or damaged. Check
all connections from the YO (A26) to the RF OUTPUT
connector (J1).
Are all connections and cables good?
Go To ILT.2260
ILT.2241
Continue
Does the instrument have low band ( 2 GHz), and does
the RF power problem exist only in low band?
Go To ILT.2245
1a-36 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.2242
The problem is most likely the low band microcircuit
(A24). A less likely possibility is the microcircuit that
selects the A24 low band output. Depending on the
instrument block diagram, this switching is done in the
following microcircuits:
All models with Option 006:
A42 Pulse Modulation Switched Filter
83620B, 83630B/L, and 83623L:
A29 Amplier Filter
83640B/L and 83650B/L:
A32 Frequency Doubler
83623B:
A33 Amplier Switch
Before continuing, check again for loose or poorly seated
connectors.
Has A24 been previously replaced?
Go To RF.2490
ILT.2245
Does the RF power problem exist only at
frequencies 2 GHz?
Go To ILT.2256
Agilent 8360
Go To ILT.2257
Continue
Instrument Level Troubleshooting 1a-37
ILT.2246
Is the synthesizer upper frequency limit 40 GHz?
Go To ILT.2255
ILT.2247
Does the RF power problem exist only above 26.5 GHz?
Go To ILT.2255
ILT.2248
Continue
Continue
Loose connections or bad RF cabling can easily cause
problems at these frequencies. Check all cabling from
the amp/mult (A28) to the RF OUTPUT (J1). If all RF
cabling appears intact, the most probable cause is the
amp/doubler (A32).
Are the cabling and J1 intact?
Go To ILT.2260
1a-38 Instrument Level Troubleshooting
Go To RF.3290
Agilent 8360
Agilent 8360
ILT.2255
The most probable fault is a loose cable between A30
and the RF OUTPUT connector. Use the block diagram
to guide you in checking power levels between A30 and
the RF OUTPUT connector. Then use the block diagram
to check the following items.
1. The RF OUTPUT connector.
2. If the instrument has option 001, the attenuator
(RF.3190).
3. The bridge detector in all models except the
83623B/24B and 83623L or the coupler/detector in the
83623B/24B and 83623L (RF.3090).
4. The low power adjustment.
5. For abrupt power drop out only, amplier/multiplier
and amplier/lter adjustments.
6. The amp/multiplier (RF.2890).
7. The amp/lter (RF.2990).
8. If present, the amp/switch (RF.3390).
9. If present, the pulse modulation switched lter
(RF.4290).
If these alternatives do not x the problem, use
the instrument block diagram (located behind the
\Troubleshooting Block Diagrams" tab) to troubleshoot
this problem.
ILT.2256
A general power level problem exists. The assemblies
that aect a broad band of frequencies start with the
coupler/detector, and end with J1. If a power level
accuracy problem exists, it is possible that the A10
assembly (ALC) is faulty. There is no easy and eective
way to continue testing without additional equipment.
The following is a prioritized list of the most probable
causes:
1. For power measurement level accuracy only, the A10
assembly (A10.9000).
2. The RF OUTPUT connector.
3. Hard lines between the A30 assembly and the RF
OUTPUT connector.
4. If the instrument has option 001, the attenuator
(RF.3190).
Instrument Level Troubleshooting 1a-39
5. The bridge detector in all models except the
83623B/24B and 83623L or the coupler/detector in the
83623B/24B and 83623L (RF.3090).
If these alternatives do not x the problem, use
the instrument block diagram (located behind the
\Troubleshooting Block Diagrams" tab) to troubleshoot
this problem.
ILT.2257
The most probable fault is a loose cable between A24
and the RF OUTPUT connector. Use the block diagram
to guide you in checking power levels between A30 and
the RF OUTPUT connector. Then use the block diagram
to check the following items.
1. The RF OUTPUT connector.
2. The appropriate assembly for your model and option
conguration from the following table:
Table 1a-3.
Instruments Without
Option 006
83620B/22B
83630B
83623B/24B
83640B/50B
83623L/30L
83640L/50L
Instruments With
Option 006
Amp/Filter (RF.2990)
Pulse Mod Switched Filter (RF.4290)
Amp/Filter (RF.2990)
Pulse Mod Switched Filter (RF.4290)
Amp/Switch (RF.3390)
Pulse Mod Switched Filter (RF.4290)
Amp Doubler (RF.3290) Amp Doubler (RF.3290)
Amp/Filter (RF.2990)
N/A
Amp Doubler (RF.3290) N/A
3. If present, the attenuator (RF.3190).
4. The bridge detector in all models except the
83623B/24B and 83623L or the coupler/detector in the
83623B/24B and 83623L (RF.3090).
1a-40 Instrument Level Troubleshooting
Agilent 8360
Agilent 8360
ILT.2260
Repair, reseat, or reconnect the cables as required and
continue with the performance tests or adjustments as
required.
ILT.2300
The step attenuator is the most likely failure, but loose
or damaged connectors are always a possibility. Go to
RF.3190.
If these alternatives do not x the problem, use
the instrument block diagram (located behind the
\Troubleshooting Block Diagrams" tab) to troubleshoot
this problem.
Instrument Level Troubleshooting 1a-41
ILT.2500
At this point in the procedure, all adjustments related
to the failing performance test should have been
successfully completed.
Select the rst failing performance test and go to the
indicated paragraph.
Failing Performance Test
Internal Timebase Aging Rate
Frequency Switching Time
Swept Frequency Accuracy
FM Accuracy
FM Maximum Frequency Deviation
FM Bandwidth
Power Flatness
Power Accuracy
Maximum Leveled Power
Step Attenuator Flatness and Accuracy
External Leveling
AM Dynamic Range
AM Accuracy
AM Frequency Response and Bandwidth
Spurious Signals (Harmonics)
Spurious Signals (Line Related)
Spurious Signals (Non-Harmonics)
Single Sideband Phase Noise
Pulse Performance
Pulse On O Ratio
Pulse Modulation Video Feedthrough
Internal Pulse Accuracy
Modulation Meter
1a-42 Instrument Level Troubleshooting
Go to Paragraph
A23.000
ILT.2670
ILT.2660
ILT.2690
ILT.2690
ILT.2690
ILT.2695
ILT.2695
ILT.2695
RF.3190
A10.9000
ILT.2620
ILT.2620
ILT.2620
ILT.2650
ILT.2610
ILT.2630
ILT.2640
ILT.2680
ILT.2680
ILT.2600
A8.9000
A8.9000
Agilent 8360
ILT.2600
Does the pulse modulation feedthrough occur only below
2 GHz?
Continue
ILT.2601
Is Option 006 installed?
Go To RF.3890
ILT.2610
Agilent 8360
Go To RF.2490
Go To RF.4290
Line related spurs are spurious signals oset from
the carrier by multiples of the line frequency. If, for
example, the line frequency is 60 Hz, line related spurs
can occur at 60, 120, 180, 240 Hz, and so on. The most
prevalent spur is the second harmonic.
The most likely cause of line related spurs is EMI
(electromagnetic interference) from other sources or
from poor grounding. EMI can occur as a result of
shielding degradation in the synthesizer due to damage
or faulty reinstallation of the top or bottom covers, or
the braided shielding. A faulty line lter (FL1) can also
cause spurs. Recheck the measurement and set up for
faulty grounds. Check the synthesizer shielding. Check
the environment for unusually strong line currents close
to the measurement.
If there is no likely external source, replace FL1. After
taking action, go to the Troubleshooting Foldout, block 1
(located just prior to the \Special Cases" tab).
Instrument Level Troubleshooting 1a-43
ILT.2620
The problem can be caused by the A10 assembly (ALC),
the A8 assembly (mod/gen), or by a microcircuit. Using
the table below, go to the indicated paragraphs.
Failing Frequency
Range or Failure Mode
Go to
Paragraph
2 GHz only
2 GHz only
A10.9000 (ALC) or RF.2490 (low band)
Above and below 2 GHz
A10.9000 (ALC) or A8.9000 (mod/gen)
Fails AM Accuracy or
Dynamic Range for
internal modulation
A8.9000 (mod/gen)
A10.9000 (ALC) or RF.3890 (dual
modulator or AM modulator in Opt. 006)
ILT.2630
There are two types of non-harmonic, non-line related
spurious signals (spurs):
Crossing spurs. These are usually caused by poor
shielding, or by interaction between the YO loop phase
detector assembly (A5) and the sampler assembly (A6).
Another cause is 10 MHz or a harmonic of 10 MHz
getting into the sampler assembly. Check shielding,
grounds, ltering on the A6 assembly, and cable
routing.
Fixed oset spurs. These are the most common spurs.
They appear at a xed oset from the carrier.
The following table lists the most common oset spurs,
the their possible causes.
Note
If the fault is only in low band, the low band microcircuit
(A24) is also a possible cause.
1a-44 Instrument Level Troubleshooting
Agilent 8360
Oset from Carrier
Most Likely Fault
60 kHz
Grounds, connections and shielding,
A16, A17, A18
120 kHz
A16, A17, A18
20 or 40 kHz
A3, A6 shielding/ltering
Random Low Frequency Fan (B1)
10 or 20 MHz
Routing of cables to and from A7.
These problems are very dicult to isolate, and require
patience. Often, the quickest and most economical way
to isolate a problem is to substitute modules.
After taking action, go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.2640
Agilent 8360
Poor grounds or shielding problems in either the
environment or the measurement system can produce
what looks like a failure in phase noise measurements.
Another common source of phase noise is physical
vibration. When you are sure that the measurements
accurately reect a failure, refer to the following graph.
Locate the failed frequency on the graph and go to the
paragraph shown for that frequency. Note, if your failure
is between 100 Hz and 1 kHz, check frequencies above
and below the failure. If the frequencies below 100 Hz
are failing or are close to failing, go to A7.9000. If the
frequencies above 1 kHz are failing or are close to failing,
go to A6.9000. In the synthesizer, phase noise is usually
concentrated at one of three carrier osets. Failures
of phase noise at these osets have fairly predictable
causes. Before you change a module, check the phase
noise measurement system.
Instrument Level Troubleshooting 1a-45
Note
If the fault is only in low band, the low band microcircuit
(A24) is also a possible cause (RF.2490).
These problems are very dicult to isolate, and require
patience. Often, the quickest and most economical way
to isolate a problem is to substitute modules.
After taking action go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.2650
Perform a full user calibration:
1. Press 4USER CAL5.
2. Select FullUsr Cal .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
If the problem still exists, continue. In general,
troubleshoot harmonics using the block diagram. Go from
the RF OUTPUT (J1) to each of the active RF devices
(A24, A26, A28, A29, A33, A38, A42, for models with
Option 006, and A32, for models capable of >26.5 GHz).
Use the ALC menus to help control the level during a
measurement. Pay attention to the bands in which the
1a-46 Instrument Level Troubleshooting
Agilent 8360
problem appears. Use the table below to help isolate the
problem.
Failing Data Points
Most Likely Causes
2 GHz only
Low band microcircuit (A24)
> 26.5 GHz
Amp/Doubler (A32)
All Other Cases
YO (A26); amp/multiplier (A28);
amp/lter (A29); amp/switch (A33);
dual modulator (A38); and pulse
mod switched lter (A42)
(83640B/50B and
83640L/50L)
After taking action, go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.2660
The most likely cause is the YO driver assembly (go to
A13.9000), the next possibility is YO assembly (go to
RF.2690).
After taking action, go to the troubleshooting foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.2670
The most likely faults are listed below:
1. The most likely fault is the measurement setup. Check
the setup.
2. Check the calibration constants listed in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide. Pay
special attention to the following calibration constants:
a. Lock dwell time.
b. Max phase lock wait.
3. If an unlock message appears, press 4PRESET5 4SERVICE5
Unlock Info . The following is a prioritized list. Find
the rst one that applies.
a. REF UNLOCK: go to A7.9000.
b. SAMPLER UNLOCK: go to A6.9000.
c. FRACN UNLOCK: go to A4.9000.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Agilent 8360
Instrument Level Troubleshooting 1a-47
d. YO UNLOCK: consider the following, in the order
listed.
i. A6: go to A6.9000.
ii. A5: go to A5.9000.
iii. A13: go to A13.9000.
iv. A26: go to RF.2690.
e. HET UNLOCK: go to RF.2490.
4. The microprocessor may cause the fault, go to
A15.9000.
If these alternatives do not x the problem, use
the instrument block diagram (located behind the
\Troubleshooting Block Diagrams" tab) to troubleshoot
this problem.
ILT.2680
If the problem occurs only at < 2 GHz, it is most likely
the low band (A24). Go to RF. 2490. Otherwise, the
following table shows the three basic types of pulse
problems and their most likely causes:
Failure Mode
Most Likely Fault
Rise and Fall Time
Amp/Filter (RF.2990) or, for
Opt. 006, pulse mod switched
lter (RF.4290)
Leveling
Pulse (A9.9000);
or ALC (A10.9000)
On/O Ratio
Dual/modulator (RF.3890) or,
for Opt. 006, pulse mod switched
lter (RF.4290);
Amp/multiplier (RF.2890);
YO (RF.2690);
or poor connections
If these alternatives do not x the problem, use
the instrument block diagram (located behind the
\Troubleshooting Block Diagrams" tab) to troubleshoot
this problem.
1a-48 Instrument Level Troubleshooting
Agilent 8360
Agilent 8360
ILT.2690
The most likely fault is the YO (A26). However, rst
check the following items before going to RF.2690 to
replace the A26 assembly:
1. If the performance test fails at modulation rates of
about 100 kHz in AC FM, do the \YO Loop Gain"
adjustment.
2. If the performance test fails only in DC FM, the YO
driver (A13) may be at fault.
3. Go to ILT.2101 to check the FM driver (A11). If this
test fails then replace A11.
4. Go to ILT.2141 to check the modulation generator (A8)
if Option 002 is installed. If this test fails then replace
A8.
ILT.2695
The diagnostics already performed are probably
more accurate than the remaining procedures. These
procedures may not be able to identify the failed
assembly. This is particularly true when a specication
has only marginally failed. Before continuing, verify all
RF cable connections on the RF deck. If no problems are
found, go to ILT.2240.
Instrument Level Troubleshooting 1a-49
ILT.3000
Select the rst faulty I/O port listed below.
Failing Input or Output
Display Output
Keyboard Input
RF Output
AM Input
AM Input, Opt. 002 installed
FM Input
FM Input, Opt. 002 installed
Pulse Input,Output
Pulse Input,Output, Opt. 002 installed
External ALC Input
Rear Panel Source Module Interface
Front Panel Source Module Interface
GPIB Input,Output
10 MHz Ref Input
10 MHz Ref Output
Trigger Input
Sweep Output
V/GHz Output
Stop Sweep Input, Output
Z-Axis Blanking, Markers Output
Trigger Output
Auxiliary Interface
Rear Panel GPIB Address Switches
Pulse Video Output
Pulse Sync Output
AM/FM Output
AUX OUTPUT
1a-50 Instrument Level Troubleshooting
Go to Paragraph
ILT.3010
ILT.3020
ILT.2240
ILT.3030
ILT.3230
ILT.3040
ILT.3240
ILT.3050
ILT.3250
ILT.3062
ILT.3070
ILT.3080
ILT.3090
ILT.3100
ILT.3110
ILT.3120
ILT.3200
ILT.3300
ILT.3400
ILT.3500
ILT.3600
ILT.3700
ILT.3800
ILT.3900
ILT. 3910
ILT.3920
ILT.3930
Agilent 8360
ILT.3010
If the display is dim and ickering, check the dim display
option: Press SYSTEM 4MENU5, and select Dim Display .
Repeatedly select Dim Display to toggle this attribute.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Does the problem remain when you toggle
Dim Display ?
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Done
ILT.3011
Continue
The remaining display problems are most likely one of the
following:
Cosmetic fault. The display appearance is fuzzy, varies
in brightness from segment to segment, or another
supercial characteristic is questionable. Replace the
display (go to A21.9000).
The display takes a long time to update, and UNLOCK
ashes in the display.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Press 4PRESET5 4SERVICE5 and select Unlock Info . The
following is a prioritized list. Find the rst one that
applies.
1. REF UNLOCK: go to A7.9000.
2. SAMPLER UNLOCK: go to A6.9000.
3. FRACN UNLOCK: go to A4.9000.
4. YO UNLOCK: consider the following, in the order
listed:
a. A6: go to A6.9000.
b. A5: go to A5.9000.
c. A13: go to A13.9000.
d. A26: go to RF.2690.
5. HET UNLOCK: go to RF.2490.
If the display updates slowly, examine (and modify, if
required) calibration constant #554 using the following
procedure:
Press 4PRESET5 4SERVICE5.
Agilent 8360
Instrument Level Troubleshooting 1a-51
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Select Adjust Menu Calib Menu Select Cal .
Press 45545 4ENTER5.
Calibration constant #554 should be set to 245. If it is
not, continue with the following:
Select Modify Cal .
Press 42455 4ENTER5.
Select Cal Util Menu Save Cal yes .
The display has an intermittent fault such as going
blank, or unintelligible characters displayed. Possible
failures include the following:
1. Display (A21).
2. Front panel processor (A3).
3. Cables (W1, W3, W4).
If these alternatives do not x the problem, use
the instrument block diagram (located behind the
\Troubleshooting Block Diagrams" tab) to troubleshoot
this problem.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNN
1a-52 Instrument Level Troubleshooting
Agilent 8360
ILT.3020
Keyboard problems are most likely one of the following:
The display takes a long time to update, and UNLOCK
ashes in the display. Press 4PRESET5 4SERVICE5 and
select Unlock Info . The following is a prioritized list.
Find the rst one that applies.
1. REF UNLOCK: go to A7.9000.
2. SAMPLER UNLOCK: go to A6.9000.
3. FRACN UNLOCK: go to A4.9000.
4. YO UNLOCK: consider the following, in this order:
a. A6: go to A6.9000.
b. A5: go to A5.9000.
c. A13: go to A13.9000.
d. A26: go to RF.2690.
5. HET UNLOCK: go to RF.2490.
Cosmetic fault. The appearance, or another supercial
characteristic, is questionable. Replace the keyboard
(go to A1.9000).
The keyboard has an intermittent fault. Possible
failures include the following:
1. Keyboard (A1).
2. Front panel processor (A3).
3. Cables (W3, W5).
If the display updates slowly, examine (and modify, if
required) calibration constant #554 using the following
procedure:
Press 4PRESET5 4SERVICE5.
Select Adjust Menu Calib Menu Select Cal .
Press 45545 4ENTER5.
Calibration constant #554 should be set to 245. If it is
not, continue with the following:
Select Modify Cal .
Press 42455 4ENTER5.
Select Cal Util Menu Save Cal yes .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNN
If these alternatives do not x the problem, use the
instrument block diagram (behind the \Troubleshooting
Block Diagrams" tab) to troubleshoot this problem.
Agilent 8360
Instrument Level Troubleshooting 1a-53
ILT.3030
Check the continuity between front/rear panel AM input
and the end of W7 (connects to A10J1).
Continue
Go To A10.9000
ILT.3031
Replace the cable (W7) connecting the front/rear panel
AM input to A10J1, and go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
ILT.3040
Check the continuity from the front/rear panel to the end
of W8 (connects to A11J1).
Continue
1a-54 Instrument Level Troubleshooting
Go To A11.9000
Agilent 8360
ILT.3041
Replace the cable (W8) that connects the front/rear
panel FM input to A11J1, and go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
ILT.3050
Check the continuity from the front/rear panel pulse
input and the end of W6 (connects to A9J4).
Continue
ILT.3051
Replace the cable (W6) that connects the front/rear
panel pulse input to A9J4 and go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
ILT.3052
Does the pulse problem exist only below 2 GHz?
Continue
Agilent 8360
Go To ILT.3052
Go To ILT.3054
Instrument Level Troubleshooting 1a-55
ILT.3053
Does the pulse problem exist only above 2 GHz?
Go To A9.9000
ILT.3054
Go To ILT.3057
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41085 4ENTER5.
4. Select Log (asterisk on).
5. Select Output Menu When to Log Always .
6. Press 4PRIOR5.
7. Select Do Test #108 .
8. Select Cont Cont .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNN
Go To A9.9000
1a-56 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.3055
Continue
Go To RF.2490
ILT.3056
Replace W33 and then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.3057
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41085 4ENTER5.
4. Select Log (asterisk on).
5. Select Output Menu When to Log Always .
6. Press 4PRIOR5.
7. Select Do Test #108 .
8. Select Cont until HB Mod OFF [mV] is displayed.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
Make the following measurements.
Agilent 8360
Instrument Level Troubleshooting 1a-57
Go To A9.9000
ILT.3058
Continue
Is Option 006 installed?
Go To ILT.3060
1a-58 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.3059
Go To ILT.3061
Go To RF.4290
ILT.3060
Continue
Agilent 8360
Go To RF.3890
Instrument Level Troubleshooting 1a-59
ILT.3061
Replace W32 and then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.3062
Check the continuity from the front panel external
ALC input (rear panel for option 004) to the end of W9
(connects to A10J4).
Continue
Go To A10.9000
ILT.3063
Replace the cable (W9) that connects the front
panel external ALC input to A10J4, and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
ILT.3070
Using either an oscilloscope or a voltmeter, check the
following voltages at the front panel SMI connector.
Location
1a-60 Instrument Level Troubleshooting
Measurement
Pin 7
+5.2 Vdc
Pin 5
+15.0 Vdc
Pin 10, 18, 19, 20
TTL High
Agilent 8360
Did all voltages pass?
Go To A2.9000
ILT.3071
Continue
Perform the following setup:
1. Press 4PRESET5.
2. Press 4SWEEP TIME5 410.05 4SEC5.
Using either an oscilloscope or a voltmeter, check the
following voltages on the front panel SMI connector.
Note that pin 12 is a sweep ramp. To adjust the sweep
ramp, change the instrument sweep time (if you use an
oscilloscope, try a sweep time of approximately 100 ms).
Location
Measurement
Pin 15
015 Vdc
Pin 6
+8.0 Vdc
Pin 12
Sweep Ramp (0 to 10.0 V)
Did all voltages pass?
Go To ILT.3075
Agilent 8360
Continue
Instrument Level Troubleshooting 1a-61
ILT.3072
Measure on the center pin at each end of the cable.
Continue
Go To ILT.3074
ILT.3073
Replace the cable (W10) that connects the front
panel SMI input to the A10 assembly, and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
ILT.3074
Although the problem has not been isolated, the
following are possible:
The front panel SMI (A2) is faulty.
W2 is faulty (connects A2 to the motherboard).
The ALC assembly (A10) is faulty. This is true if
leveling is the problem.
The source module used with the synthesizer is faulty.
To conrm this, either use the rear panel SMI, or
substitute a new source module or synthesizer.
A remote possibility exists that the motherboard (A22)
is faulty.
If these alternatives do not x the problem, use
the instrument block diagram (located behind the
\Troubleshooting Block Diagrams" tab) to troubleshoot
this problem.
1a-62 Instrument Level Troubleshooting
Agilent 8360
ILT.3075
Either the front panel SMI (A2) or the ribbon cable
(W10) is faulty. Inspect the ribbon cable. Replace
the A2 assembly or W10, as required, and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
ILT.3080
Using either an oscilloscope or a voltmeter, check the
following voltages at the rear panel SMI connector.
Location
Measurement
Pin 7
+5.2 Vdc
Pin 5
+15.0 Vdc
Pin 10, 18, 19, 20
TTL High
Did all voltages pass?
Go To A19.9000
ILT.3081
Agilent 8360
Continue
Perform the following setup:
1. Press 4PRESET5.
2. Press 4SWEEP TIME5 4105 4SEC5.
Using an oscilloscope or a voltmeter, check the following
voltages on the rear panel SMI connector. Note that pin
12 is a sweep ramp. To change the sweep ramp, change
the sweep time (using an oscilloscope, try a sweep time of
approximately 100 ms).
Instrument Level Troubleshooting 1a-63
Location
Measurement
Pin 15
015 Vdc
Pin 6
+8.0 Vdc
Pin 12
Sweep Ramp (0 to 10 V)
Did all voltages pass?
Go To ILT.3085
ILT.3082
Measure at the center pin at each end of the cable.
Continue
ILT.3083
Continue
Go To ILT.3084
Replace the cable (W23) that connects the rear panel SMI
input to the A10 assembly, and go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
1a-64 Instrument Level Troubleshooting
Agilent 8360
ILT.3084
The problem is not isolated, but the following are possible
failures:
The rear panel SMI (A19) is faulty.
W31 is faulty (connects A19 to the motherboard).
The ALC assembly (A10) is faulty. This is true if
leveling is the problem.
The source module used with the synthesizer is faulty.
To conrm this, try to use the front panel SMI, or
substitute either a new source module or synthesizer.
A remote possibility exists that the motherboard (A22)
is faulty.
If these alternatives do not x the problem, use
the instrument block diagram (located behind the
\Troubleshooting Block Diagrams" tab) to troubleshoot
this problem.
ILT.3085
Either the rear panel SMI (A19) or the ribbon cable (W23)
is faulty. Inspect the ribbon cable. Replace the A19
assembly or W23, and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.3090
GPIB problems involve a ribbon cable and one of three
assemblies. The assemblies are listed below from most to
least likely to fail. First, run the GPIB port self-test that
follows. If this self-test fails, the CPU assembly (A15) is
the most likely failure. If this test passes, change the
assemblies in the order listed.
1. Ensure that nothing is connected to the GPIB
connector.
2. Press 4PRESET5 4SERVICE5.
3. Select Selftest Menu .
4. Press 42365 4ENTER5.
5. Select Do Test #236 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Most likely failures:
1. An excessive length of GPIB cable. (The specication
for length of GPIB cable is no more than 2 meters per
Agilent 8360
Instrument Level Troubleshooting 1a-65
instrument and a maximum of 20 meters. Exceeding
this length may lock up the data bus.)
2. The rear panel SMI (A19).
3. The CPU assembly (A15).
4. The ribbon cable W23 (connects A19 to motherboard).
5. There is a remote possibility of a motherboard (A22)
fault.
If these alternatives do not x the problem, consult
\Special Cases" to troubleshoot this problem.
ILT.3100
Check the continuity from the rear panel 10 MHz input to
the end of W16 (connects to A7J1).
Continue
ILT.3101
Go To ILT.3102
Replace W16 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1a-66 Instrument Level Troubleshooting
Agilent 8360
ILT.3102
Continue
ILT.3103
Go To A7.9000
Correct the reference into the rear panel. If a problem
still exists, refer to the instrument block diagram (located
behind the \Troubleshooting Block Diagrams" tab) to
troubleshoot this problem.
ILT.3110
Go To ILT.3112
Agilent 8360
Continue
Instrument Level Troubleshooting 1a-67
ILT.3111
There does not seem to be a failure. The rear panel
output should be 10 MHz at approximately 0 dBm. If a
problem still exists, refer to the instrument block diagram
(located behind the \Troubleshooting Block Diagrams"
tab) to troubleshoot this problem.
ILT.3112
Go To A7.9000
ILT.3113
Continue
Replace W19, the coaxial cable that connects A7J5 to the
rear panel, and go to the Troubleshooting Foldout, block
1 (located just prior to the \Special Cases" tab).
1a-68 Instrument Level Troubleshooting
Agilent 8360
ILT.3120
Before continuing, be sure that auto sweep operates
correctly. If it does not, restart troubleshooting at
ILT.000.
Measure the resistance between the TRIGGER INPUT and
XA15J1-61.
Is the resistance 90 and 110 ?
Go To ILT.3140
ILT.3121
Continue
Perform the following setup:
1. Press 4PRESET5 SWEEP 4MENU5.
2. Select Start Sweep Trigger Ext .
3. Press 4SWEEP TIME5 455 4SEC5.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A15.9000
Agilent 8360
Continue
Instrument Level Troubleshooting 1a-69
ILT.3122
Is the front panel SWEEP indicator ashing and do you
have a front panel?
Continue
ILT.3123
Perform the following setup:
Connect a function generator to the rear panel trigger
input.
Set the function generator for a 10 Hz, TTL square
wave.
Observe the SWEEP OUTPUT on the rear panel.
Go To ILT.3150
ILT.3124
Go To A15.9000
Continue
Does your instrument have a front panel with a display
and is the front panel SWEEP indicator ashing?
Go To ILT.3170
1a-70 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.3125
The trigger and sweep outputs seem to be working. If an
undetected failure exists, look at the instrument block
diagram (located behind the \Troubleshooting Block
Diagrams" tab). The assemblies most intimately tied
to the trigger input and sweep output are the sweep
generator assembly (A14) and the CPU assembly (A15).
ILT.3140
Measure the resistance between A22J8-41 and
XA15J1-61.
Is the resistance > 2 ?
Go To ILT.3160
ILT.3141
There is an open on the motherboard between A22J8-41
and XA15J1-61. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
ILT.3142
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.3150
Measure the resistance between SWEEP OUTPUT and
XA14J2-4.
Is the resistance 90 to 110 ?
Continue
Agilent 8360
Continue
Go To A14.9000
Instrument Level Troubleshooting 1a-71
ILT.3151
Measure the resistance between A22J8-31 and XA14J2-4.
Is the resistance > 2 ?
Go To ILT.3160
ILT.3152
Continue
There is an open on the motherboard between A22J8-31
and XA14J2-4. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
ILT.3153
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.3160
A fault exists in either the rear panel SMI (A19) or the
ribbon cable W31. Inspect W31. Replace the rear panel
SMI (A19) or W31, and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1a-72 Instrument Level Troubleshooting
Agilent 8360
ILT.3170
Perform the following setup:
1. Press 4PRESET5 4START5 455 4GHz5.
2. Press 4STOP5 475 4GHz5.
3. Press 4SWEEP TIME5 455 4SEC5.
4. Press 4SINGLE5.
5. To make the measurement repeatedly, press 4SINGLE5.
A TTL should be present that goes low for about
5 seconds, then high, each time you press 4SINGLE5.
Go To A14.9000
Agilent 8360
Continue
Instrument Level Troubleshooting 1a-73
ILT.3171
Repeatedly press 4SINGLE5. You should see a 5 second TTL
low.
Continue
ILT.3180
Go To ILT.3190
There is an open on the motherboard between XA14J2-7
and A22J2-34. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
ILT.3181
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.3190
There is a fault associated with the front panel processor
assembly (A3), keyboard (A1), or the interconnecting
cables W3 (motherboard to A3) or W5 (A3 to A1).
Either check the ribbon cables, replace the appropriate
assemblies, or both. If these alternatives do not x the
problem, use the instrument block diagram (located at
the end of \Special Cases") to troubleshoot this problem.
1a-74 Instrument Level Troubleshooting
Agilent 8360
ILT.3200
Perform the following setup:
1. Press 4PRESET5 4START5 455 4GHz5.
2. Press 4STOP5 475 4GHz5.
3. Press 4SWEEP TIME5 41005 4msec5.
You should see a 100 ms, 0.0 to 10.0 V ramp.
Go To ILT.3202
ILT.3201
Agilent 8360
Continue
Nothing seems to fail. If an intermittent or non-linear
sweep output failure exists, the most likely failure is the
sweep generator assembly (A14). Less likely failures are
the rear panel SMI (A19), and the ribbon cable (W31).
If these alternatives do not x the problem, use the
instrument block diagram (located at the end of \Special
Cases") to troubleshoot this problem.
Instrument Level Troubleshooting 1a-75
ILT.3202
Continue
Go To ILT.3160
ILT.3203
Go To A14.9000
1a-76 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.3204
There is an open on the motherboard between XA14J2-4
and A22J8-31. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
ILT.3205
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.3230
Check the continuity from the front (or rear) panel AM
input to the end of W7 (which connects to A8J7).
Go To ILT.3235
Agilent 8360
Continue
Continue
Instrument Level Troubleshooting 1a-77
ILT.3231
Perform the following setup:
1. Reconnect all cables.
2. Set the power switch to standby.
3. Disconnect W67 from A10J1.
4. Connect an oscilloscope to the disconnected end of
W67.
5. Connect a function generator to the AM input on the
front (or rear) panel.
6. Turn on synthesizer power.
7. Set the function generator for a 0.25 V rms sine wave
at 1.0 MHz.
8. Press 4PRESET5.
9. Press 4MOD5 AM Menu AM On/Off Ext (asterisk on).
NNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
The oscilloscope should display the same signal as the
function generator, a sine wave approximately 0.25 V rms
(.707 V p-p) at 1.0 MHz.
Continue
1a-78 Instrument Level Troubleshooting
Go To A10.9000
Agilent 8360
ILT.3232
Perform the following setup:
1. Reconnect all cables.
2. Set the power switch to standby.
3. Disconnect W67 from A8J8.
4. Connect an oscilloscope to the A8J8 connector.
5. Connect a function generator to the AM input on the
front (or rear) panel.
6. Turn on synthesizer power.
7. Set the function generator for a 0.25 V rms sine wave
at 1.0 MHz.
8. Press 4PRESET5.
9. Press 4MOD5 AM Menu AM On/Off Ext (asterisk on).
NNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
The oscilloscope should display the same signal as the
function generator, a sine wave approximately 0.25 V rms
(.707 V p-p) at 1.0 MHz.
Go To A8.9000
Agilent 8360
Go To ILT.3236
ILT.3235
Replace W7 (front or rear panel AM input to A8J7) and
go to the Troubleshooting Foldout, block 1 (located just
prior to the \Special Cases" tab).
ILT.3236
Replace W67 (cable between A8J8 and A10J1) and go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
Instrument Level Troubleshooting 1a-79
ILT.3240
Check the continuity from the front (or rear) panel FM
input to the end of W8 (which connects to A8J10).
Go To ILT.3245
1a-80 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.3241
Perform the following setup:
1. Reconnect all cables.
2. Set the power switch to standby.
3. Disconnect W68 from A11J1.
4. Connect an oscilloscope to the disconnected end of
W68.
5. Connect a function generator to the FM input on the
front (or rear) panel.
6. Turn synthesizer power on.
7. Set the function generator for a 0.25 V rms sine wave
at 1.0 MHz.
8. Press 4PRESET5.
9. Press 4MOD5 FM Menu FM On/Off Ext (asterisk on).
NNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
The oscilloscope should display the same signal as the
function generator, a sine wave approximately 0.25 V rms
(.707 V p-p) at 1.0 MHz.
Continue
Agilent 8360
Go To A11.9000
Instrument Level Troubleshooting 1a-81
ILT.3242
Perform the following setup:
1. Reconnect all cables.
2. Set the power switch to standby.
3. Disconnect W68 from A8J9.
4. Connect an oscilloscope to the A8J9 connector.
5. Connect a function generator to the FM input on the
front (or rear) panel.
6. Turn on synthesizer power.
7. Set the function generator for a 0.25 V rms sine wave
at 1.0 MHz.
8. Press 4PRESET5.
9. Press 4MOD5 FM Menu FM On/Off Ext (asterisk on).
NNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
The oscilloscope should display the same signal as the
function generator, a sine wave approximately 0.25 V rms
(.707 V p-p) at 1.0 MHz.
Go To A8.9000
Go To ILT.3246
ILT.3245
Replace W8, front (or rear) panel FM input to A8J10, and
go to the Troubleshooting Foldout, block 1 (located just
prior to the \Special Cases" tab).
ILT.3246
Replace W68 (cable between A8J9 to A11J1) and go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
1a-82 Instrument Level Troubleshooting
Agilent 8360
ILT.3250
Check the continuity from the front or rear panel PULSE
INPUT to the end of W6 (which connects to A8J3).
Go To ILT.3255
Agilent 8360
Continue
Instrument Level Troubleshooting 1a-83
ILT.3251
Perform the following setup:
1. Reconnect all cables.
2. Set the power switch to standby.
3. Disconnect W66 from A9J3.
4. Connect an oscilloscope to the disconnected end of
W66.
5. Connect a function generator to the PULSE INPUT on
the front (or rear) panel.
6. Turn on synthesizer power.
7. Set the function generator for a 1.6 V rms square
wave at 1.0 MHz.
8. Press 4PRESET5.
9. Press 4MOD5 Pulse Menu Pulse On/Off Ext (asterisk
on).
The oscilloscope should display a TTL signal at 1.0 MHz.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
1a-84 Instrument Level Troubleshooting
Go To ILT.3052
Agilent 8360
ILT.3252
Perform the following setup:
1. Reconnect all cables.
2. Set the power switch to standby.
3. Disconnect W66 from A8J5.
4. Connect an oscilloscope to the A8J5 connector.
5. Connect a function generator to the PULSE INPUT on
the front (or rear) panel.
6. Turn on synthesizer power.
7. Set the function generator for a 1.6 V rms square
wave at 1.0 MHz.
8. Press 4PRESET5.
9. Press 4MOD5 Pulse Menu Pulse On/Off Ext (asterisk
on).
The oscilloscope should display a TTL signal at 1.0 MHz.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A8.9000
Agilent 8360
Go To ILT.3256
Instrument Level Troubleshooting 1a-85
ILT.3255
Replace W6 (front or rear panel PULSE INPUT to A8J3)
and go to the Troubleshooting Foldout, block 1 (located
just prior to the \Special Cases" tab).
ILT.3256
Replace W66 (cable between A8J5 and A9J3) and go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
ILT.3300
Turn the power switch to standby and remove the SYTM
driver assembly (A12). Inspect the DIP switch on the A12
assembly. The switch should be set as indicated in the
table below.
Upper Freq Limit Switch 1 Switch 2 Switch 3 Switch 4 Switch 5
15.0 GHz
Closed
Closed
Closed
Closed
Open
15.0 to 30.0 GHz
Open
Open
Closed
Closed
Open
30.0 GHz
Open
Open
Open
Open
Open
Are any of the switches set incorrectly?
Go To ILT.3301
Continue
Correct the switch settings, reinstall A12, and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
1a-86 Instrument Level Troubleshooting
Agilent 8360
ILT.3301
Perform the following setup:
1. Press 4PRESET5 4SWEEP TIME5.
2. Press 455 4SEC5.
3. Observe the Volts/GHz out the rear panel.
4. The scaling of the ramp can be 1, 0.5, or 0.25 V/GHz.
See the following table.
Upper Frequency Scaling
Limit (GHz) Volts/GHz
Go To ILT.3303
ILT.3302
Agilent 8360
15
1.0
15 to 30
0.5
30
0.25
Continue
Nothing seems to be wrong with the VOLTS/GHz output.
If there is an undetected fault, the most likely source
is the SYTM driver assembly (A12). If the problem still
exists, go to \Special Cases" to troubleshoot this problem.
Instrument Level Troubleshooting 1a-87
ILT.3303
Upper Frequency Scaling
Limit (GHz) Volts/GHz
15
1.0
15 to 30
0.5
30
0.25
Go To A12.9000
Continue
Replace W27 (connects A12 to the rear panel Volts/GHz),
and go to the Troubleshooting Foldout, block 1 (located
just prior to the \Special Cases" tab).
ILT.3400
Perform the following setup:
1. Press 4PRESET5 4SWEEP TIME5.
2. Press 4305 4SEC5.
Alternately short to ground and open the rear panel
STOP SWEEP IN/OUT center conductor. Observe the
SWEEP OUTPUT at the rear panel with a voltmeter;
if the instrument has a front panel with a display and
keyboard, observe the SWEEP indicator on the front
panel. When the center conductor is shorted to ground,
the SWEEP OUTPUT should stop sweeping and the front
panel SWEEP indicator should be o; when the center
1a-88 Instrument Level Troubleshooting
Agilent 8360
conductor is not shorted to ground, the output should
sweep, and the indicator should be on (or blinking).
Does the STOP SWEEP IN/OUT properly control the rear
panel SWEEP OUTPUT and the front panel SWEEP
indicator?
Go To ILT.3405
ILT.3401
Press 4SWEEP TIME5 425 4SEC5. You should see a TTL high
with a short TTL low every 2 to 3 seconds.
Go To A14.9000
ILT.3402
Agilent 8360
Continue
Continue
The rear panel STOP SWEEP IN/OUT seems to be
working properly. If an undetected problem exists,
consider replacing the sweep generator assembly
(A14.9000). Otherwise, use the instrument block diagram
(located at the end of \Special Cases") to troubleshoot
this problem.
Instrument Level Troubleshooting 1a-89
ILT.3405
Identify XA14J2-36. Alternately short to ground and
open the XA14J2-36. Observe the SWEEP OUTPUT
at the rear panel with a voltmeter; if the instrument
has a front panel with a display and keyboard, observe
the SWEEP indicator on the front panel. When the
pin is shorted to ground, the SWEEP OUTPUT should
stop sweeping and the front panel SWEEP indicator
should be o; when the pin is not shorted to ground, the
output should sweep, and the indicator should be on (or
blinking).
Does XA14J2-36 properly control the front panel SWEEP
indicator?
Go To A14.9000
ILT.3406
Continue
Identify A22J8-35. Alternately short to ground and open
A22J8-35. Observe the SWEEP OUTPUT at the rear panel
with a voltmeter; if the instrument has a front panel with
a display and keyboard, observe the SWEEP indicator on
the front panel. When the pin is shorted to ground, the
SWEEP OUTPUT should stop sweeping and the front
panel SWEEP indicator should be o; when the pin is
not shorted to ground, the output should sweep, and the
indicator should be on (or blinking).
Does A22J8-35 properly control the front panel SWEEP
indicator?
Continue
1a-90 Instrument Level Troubleshooting
Go To A19.9000
Agilent 8360
ILT.3407
There is an open on the motherboard between XA14J2-36
an A22J8-35. Verify this with an ohmmeter. Is jumpering
an acceptable repair?
Go To A22.9000
Continue
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.3500
Perform the following setup:
1. Press 4PRESET5.
2. Press 4SWEEP TIME5 455 4SEC5 4SINGLE5.
3. Press 4START5 455 4GHz5.
4. Press 4STOP5 475 4GHz5.
5. Checking the Z-AXIS BLANK/MKRS on the rear panel,
repeatedly press 4SINGLE5.
a. While not sweeping = TTL high.
b. During sweep = TTL low.
Go To ILT.3505
Agilent 8360
Continue
Instrument Level Troubleshooting 1a-91
ILT.3501
The rear panel Z-AXIS BLANK/MKRS seems to be
working properly. If an undetected problem exists,
consider replacing the sweep generator assembly
(A14.9000).
ILT.3505
Checking XA14Jl-78, repeatedly press 4SINGLE5.
Not sweeping = TTL high.
During sweep = TTL low.
Go To A14.9000
1a-92 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.3506
Checking A22J8-37, repeatedly press 4SINGLE5.
Not sweeping = TTL high.
During sweep = TTL low.
Continue
ILT.3507
There is an open on the motherboard between XA14J1-78
an A22J8-37. Verify this with an ohmmeter. Is jumpering
an acceptable repair?
Go To A22.9000
ILT.3508
Agilent 8360
Go To ILT.3160
Continue
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
Instrument Level Troubleshooting 1a-93
ILT.3600
Press 4PRESET5. Check for a negative going TTL pulse at
the TRIGGER OUTPUT connector on the rear panel.
Continue
ILT.3601
Go To ILT.3605
Press 4PRESET5. Check for a negative going TTL pulse at
A14J2.
Go To A14.9000
Continue
Replace W28 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1a-94 Instrument Level Troubleshooting
Agilent 8360
ILT.3605
The rear panel TRIGGER OUTPUT seems to be working
properly. If an undetected problem exists, consider
replacing the sweep generator assembly (A14.9000).
ILT.3700
Press 4PRESET5. Using an oscilloscope, check for
TTL levels at the following points on the rear panel
AUXILIARY INTERFACE connector. If a failure occurs
(there is no TTL activity on one or more of the lines), go
to the indicated paragraph.
Note: Some of these signals move very slowly.
Pin
Go to
Number Paragraph
2
ILT.3710
5
ILT.3720
12
ILT.3730
15
ILT.3740
24
A19.9000
If no failure occurs, continue with ILT.3701.
Agilent 8360
Instrument Level Troubleshooting 1a-95
ILT.3701
Perform the following setup:
1. Press 4START SWEEP5 435 4GHz5.
2. Press 4STOP SWEEP5 475 4GHz5.
Check for a 0 to 10 V ramp at pin 18 of the AUXILIARY
connector.
Go To ILT.3760
ILT.3702
Continue
Locate pin 5 on the auxiliary interface. Alternately
short to ground and open pin 5. Observe pin 18 with
a voltmeter; if the instrument has a front panel with a
display and keyboard, observe the SWEEP indicator on
the front panel. When pin 5 is shorted to ground, the
output at pin 18 should stop sweeping and the front
panel SWEEP indicator should be o; when the pin is not
shorted to ground, the output at pin 18 should sweep,
and the indicator should be on (or blinking). This is the
stop sweep line that connects to the rear panel BNC of
the same name.
Did the sweep stop and start as described?
Go To ILT.3202
1a-96 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.3703
Locate pin 15 on the auxiliary interface. Alternately
short to ground and open pin 15. Observe pin 18 with
a voltmeter; if the instrument has a front panel with a
display and keyboard, observe the SWEEP indicator on
the front panel. When the pin is shorted to ground, the
output at pin 18 should stop sweeping and the front
panel SWEEP indicator should be o; when the pin is not
shorted to ground, the output at pin 18 should sweep,
and the indicator should be on (or blinking). This is the
LQSS signal, used to synchronize the A4 assemblies
in systems that have more than one 8360 L-Series
synthesizer.
Did the sweep stop and start as described?
Go To ILT.3405
ILT.3704
Most (but not all) auxiliary inputs and outputs have
been checked. The remaining faults will appear to be
synchronization problems related to having multiple
8360 L-Series synthesizers in a system, or problems with
markers.
Are you sure the instrument has an auxiliary interface
problem?
Done
Agilent 8360
Continue
Go To A19.9000
Instrument Level Troubleshooting 1a-97
ILT.3710
Press 4PRESET5 and check for TTL activity.
Go To ILT.3501
ILT.3720
Go To A19.9000
Press 4PRESET5 and check for TTL activity.
Go To ILT.3400
1a-98 Instrument Level Troubleshooting
Go To A19.9000
Agilent 8360
ILT.3730
Check for TTL activity at J8-36 on the motherboard.
Continue
ILT.3731
Check for TTL activity at XA14P2-37 on the
motherboard.
Go To A14.9000
Agilent 8360
Go To A19.9000
Continue
Instrument Level Troubleshooting 1a-99
ILT.3735
There is an open on the motherboard between A22J8 and
XA14J2-37. Verify this with an ohmmeter. Is jumpering
an acceptable repair?
Go To A22.9000
Continue
ILT.3736
Repair the open between J8-36 and XA14P2-37, and go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
ILT.3740
Check for TTL activity at J8-39 on the motherboard.
Continue
1a-100 Instrument Level Troubleshooting
Go To A19.9000
Agilent 8360
ILT.3741
Check for TTL activity at XA14P1-68 on the
motherboard.
Go To A14.9000
ILT.3745
There is an open on the motherboard. Is jumpering an
acceptable repair?
Go To A22.9000
ILT.3746
Agilent 8360
Continue
Continue
Repair the open between J8-39 and XA14P1-68, and go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
Instrument Level Troubleshooting 1a-101
ILT.3760
You should see a 0.0 to 10.0 V ramp.
Go To ILT.3202
1a-102 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.3800
The rear panel GPIB switch controls the instrument
language and address. Check the following list for
possible solutions to the problem:
To control the language from the front panel, the
language portion of the GPIB switch must be set to 7
(binary 111).
For instruments using SCPI, set the language part of
the switch to 0 (binary 000).
For instruments using Analyzer language, set the
switch to 1 (binary 001). If the instrument is used
with HP/Agilent 8510 systems, either set the language
part of the switch to 1 or set the language to Analyzer
language at the front panel. This also applies to
systems that depend on HP/Agilent 8340/8341
compatibility.
For instruments using CIIL, either set the switch to
2 (binary 010), or set it to 7 (binary 111) and set the
language to CIIL at the front panel. This language is an
option.
For MSIB instruments (including option H10), set the
switch to 3 (binary 011). This cannot be set from the
front panel.
Concerning the address switches, the 8510 (and other
systems) assume that the GPIB address is 19 (binary
10011).
Did any of these suggestions x the problem?
Go To A19.9000
Agilent 8360
Done
Instrument Level Troubleshooting 1a-103
ILT.3900
Perform the following setup:
1. Press 4PRESET5 4MOD5.
2. Select Pulse Menu Pulse On/Off Int (asterisk on).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
You should see a TTL level, 500 kHz pulse with 50% duty
cycle.
Go To ILT.3902
ILT.3901
Continue
Nothing seems to fail. If an intermittent or non-linear
video output failure exists, the most likely failure is the
modulation generator assembly (A8). If replacing A8 does
not x the problem, use the instrument block diagram
(located at the end of \Special Cases") to troubleshoot
this problem.
1a-104 Instrument Level Troubleshooting
Agilent 8360
ILT.3902
Check the continuity from the rear panel to the end of
W62 (connects to A8J4).
Continue
ILT.3903
Agilent 8360
Go To A8.9000
Replace the cable (W62) that connects the rear
panel PULSE VIDEO OUTPUT to A8J4 and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
Instrument Level Troubleshooting 1a-105
ILT.3910
Perform the following setup:
1. Press 4PRESET5 4MOD5.
2. Select Pulse Menu Pulse On/Off Int (asterisk on).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
You should see a TTL high, 50 ns 610 ns wide pulse.
Go To ILT.3912
ILT.3911
Continue
Nothing seems to fail. If an intermittent or non-linear
sync output failure exists, the most likely failure is the
modulation generator assembly (A8). If replacing A8 does
not x the problem, use the instrument block diagram
(located at the end of \Special Cases") to troubleshoot the
problem.
1a-106 Instrument Level Troubleshooting
Agilent 8360
ILT.3912
Check the continuity from the rear panel to the end of
W63 (connects to A8J6).
Continue
ILT.3913
Agilent 8360
Go To A8.9000
Replace the cable (W63) that connects the rear
panel PULSE SYNC OUTPUT to A8J6 and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
Instrument Level Troubleshooting 1a-107
ILT.3920
Perform the following setup:
1. Press 4PRESET5 4MOD5.
2. Select AM Menu AM On/Off Int (asterisk on).
3. Press 4PRIOR5.
4. Select Monitor Menu ModOut On/Off AM (asterisk
on).
You should see a 100 kHz, 600 mV p-p 6100 mV sine
wave.
NNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To ILT.3923
1a-108 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.3921
Perform the following setup:
1. Press 4PRESET5 4CW5 4MOD5.
2. Select FM Menu FM On/Off Int (asterisk on).
3. Press 4PRIOR5.
4. Select Monitor Menu ModOut On/Off FM (asterisk
on).
You should see a 1 MHz, 2 V 6200 mV sine wave.
NNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A8.9000
ILT.3922
Agilent 8360
Continue
Nothing seems to fail. If an intermittent or non-linear
AM/FM OUTPUT failure exists, the most likely failure is
the modulation generator assembly (A8). If replacing
A8 does not x the problem, use the instrument block
diagram (located at the end of \Special Cases") to
troubleshoot this problem.
Instrument Level Troubleshooting 1a-109
ILT.3923
Check the continuity from the rear panel to the end of
W64 (connects to A8J11).
Continue
ILT.3924
Go To A8.9000
Replace the cable (W64) that connects the rear panel
AM/FM OUTPUT to A8J11 and go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
1a-110 Instrument Level Troubleshooting
Agilent 8360
ILT.3930
Disconnect the 50 ohm load from the rear panel AUX
OUTPUT connector. Set the synthesizer to CW. Tune
the frequency from 2 to 26.5 GHz (or 2 to 20 GHz for
synthesizers with a maximum frequency of 20 GHz).
Go To ILT.3932
ILT.3931
Agilent 8360
Continue
There does not seem to be a failure. The rear panel
output should tune from 2 GHz to 26.5 GHz with greater
than 013 dBm power. If a problem still exists, refer
to the instrument block diagram (located behind the
\Troubleshooting Block Diagrams" tab) to troubleshoot
this problem.
Instrument Level Troubleshooting 1a-111
ILT.3932
Lift up the RF deck into the service position (refer
to the \Disassembly and Replacement Procedures" in
the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service Guide
for instructions). Set the synthesizer to CW. Tune the
frequency from 2 to 26.5 GHz (or 2 to 20 GHz for
synthesizers with a maximum frequency of 20 GHz).
Go To RF.2890
ILT.3933
Continue
Replace W48, the coaxial cable that connects A28J4 to
the rear panel, and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1a-112 Instrument Level Troubleshooting
Agilent 8360
ILT.4000
Agilent 8360
Each function has a most likely assembly or group of
assemblies responsible for an undened fault. Most of
these faults are microprocessor control type faults, and
often point to the CPU assembly (A15). The circuitry has
been previously exercised by the self-tests. The functions
listed below are primarily microprocessor manipulations
of the previously tested hardware. Also use the block
diagram (located at the end of \Special Cases") for
further assistance.
Power level functions:
RF on/o does not function properly: go to ILT.3052.
Power sweep does not function: go to A15.9000,
possibly A14.9000.
Unable to set power slope: go to A15.9000.
Unable to uncouple the attenuator: go to A15.9000
or A20.9000.
Unable to set up/down power size: go to A15.9000.
Setting frequencies (start, stop, CW, etc.):
Unable to set up/down size: go to A15.9000.
Unable to set frequency oset: go to A15.9000.
Unable to set frequency multiplier: go to A15.9000.
Unable to control marker functions: go to A15.9000,
possibly A14.9000.
Sweep function control:
List function does not work properly: go to
A15.9000.
Unable to control one of the following:
Step size: go to A15.9000.
Step points: go to A15.9000.
Step dwell: go to A15.9000.
Step sweep trigger: go to A15.9000.
Sweep ramp functions improperly: go to A14.9000.
Frequency list does not work properly:
For frequency changes greater than 500 MHz, if
unleveled or unlock indicators appear, try the
Amplier/Multiplier or Amplier/Filter adjustments.
For all other cases, A15 is the most likely cause of
failure. Go to A15.9000 to replace A15.
Fast sweep time problems ( 100 ms sweep time): Do
the YO Delay, Amplier/Multiplier, or Amplier/Filter
Instrument Level Troubleshooting 1a-113
adjustments (see the Agilent Technologies 8360 B-Series
Swept Signal Generator/L-Series Swept CW Generator
Service Guide).
Slow sweep time problems ( 5 s sweep time): Do
the YO Delay, Amplier/Multiplier, or Amplier/Filter
adjustments (see the Agilent Technologies 8360 B-Series
Swept Signal Generator/L-Series Swept CW Generator
Service Guide).
Unable to properly control single sweep or manual
sweep:
Single sweep: If you cannot control single sweep, go
to A15.9000. If you can control single sweep but
the RF signal deteriorates badly, you may need to
adjust the amp/multiplier, amp/lter, or the YO. Go to
the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service
Guide.
Manual Sweep: go to A15.9000. If the rotary knob is
not functioning, replace only the RPG (rotary pulse
generator).
Unable to use trigger sweep:
If the problem is that the sweep is triggered on the
wrong edge of the trigger pulse, verify the \External
Trigger Edge Selection" adjustment before going to
A15.9000.
If the \External Trigger Edge Selection" adjustment
just does not work, go to A15.9000.
Trigger out delay does not work: First replace the A15
assembly (go to A15.9000). If the problem remains,
replace the A14 assembly (go to A14.9000).
Save/recall registers do not function properly:
If you are unable to save or recall registers: go to
A15.9000.
If the save/recall registers are lost when AC line
power is disconnected for < 5 days, replace the CPU
(go to A15.9000).
If these alternatives do not x the problem, use the
instrument block diagram (located at the end of \Special
Cases") to troubleshoot this problem.
1a-114 Instrument Level Troubleshooting
Agilent 8360
ILT.5000
To continue, you will need either the front panel
emulation software for the 8360 L-Series synthesizers,
or a substitute front panel. Refer to \Automated Tests"
in the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service Guide
for the software and instructions. Refer to \Replaceable
Parts" in this volume for substitute front panel ordering
information. Start the front panel emulation software, or
install a substitute front panel.
If the front panel emulation software or substitute
front panel is operational, go to ILT.103. If not, use the
following information to determine the next step:
If you used a substitute front panel but it didn't work,
restart troubleshooting with that substitute front panel
installed (go to ILT.000).
If you used the front panel emulator program (part of
the \Service Support Software") but it didn't work, go
to ILT.6810.
ILT.6000
Replace RPG1 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
Agilent 8360
Instrument Level Troubleshooting 1a-115
ILT.6500
Does your instrument have a front panel display and
keyboard?
Go To ILT.6810
ILT.6501
Does the instrument display
*** POWER SUPPLY FAILURE ***?
Continue
ILT.6502
Go To ILT.6860
Does the instrument display
*** CHECK INSTRUMENT ***?
Continue
ILT.6504
Continue
Go To ILT.6811
Is the display blank, nearly blank, or unintelligible?
Continue
1a-116 Instrument Level Troubleshooting
Go To ILT.6805
Agilent 8360
ILT.6505
Is the keyboard unresponsive?
Continue
ILT.6506
Is the front panel red INSTR CHECK light not blinking or
ashing?
Continue
ILT.6507
Go To ILT.6811
Does the display appear correct except for missing
segments?
Continue
Agilent 8360
Go To ILT.6805
Go To ILT.6800
ILT.6508
Since these tests could not isolate the problem, go to
\Special Cases" and continue troubleshooting.
ILT.6800
The most likely cause for this failure is the display
(A21.9000), but the front panel microprocessor assembly
(A3.9000) could also be at fault.
If these alternatives do not x the problem, use the
instrument block diagram (located at the end of \Special
Cases") to troubleshoot this problem.
Instrument Level Troubleshooting 1a-117
ILT.6805
Perform the following:
1. Set the line power switch to STANDBY.
2. Remove the front panel (refer to the disassembly
procedures as needed).
3. Reseat all ribbon cables on the front panel.
4. Reseat all ribbon cables connecting the front panel to
the motherboard.
5. Replace the front panel on the instrument.
6. Set the line power switch to ON.
Is the keyboard or display problem still present?
Continue
Go To ILT.6810
ILT.6806
The problem has apparently been solved by reseating
the cables and reassembling the front panel. Restart
troubleshooting at ILT.000.
ILT.6810
Do the following:
1. Turn the line power switch to ON.
2. Check the indicators on the top edge of A16 for the
following:
a. Check that all eight green indicators are on.
b. Check that all red indicators are o.
Are all A16 indicators correct?
Go To ILT.6860
1a-118 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.6811
Observe the 12 small red indicators on the top edge of
A15 during the following power-up sequence:
1. Set the line power switch to STANDBY. All indicators
should be o.
2. Set the line power switch to ON. All indicators should
be on 1 to 3 seconds after power-up and then turn o
and remain o 2 to 5 seconds after power-up.
No other indicator state should occur.
Was the sequence of indicators correct?
Go To ILT.6850
ILT.6812
The power supply and microprocessor (A15, A6, A7,
A18) appear to be operating correctly. If you still have
a problem, replace the following assemblies in the order
given:
1. A3 (go to A3.9000).
2. A21, if you have a display problem (go to A21.9000).
3. A1, if you have a keyboard problem (go to A1.9000).
4. A15 (go to A15.9000).
If replacing these assemblies does not solve the problem,
go to \Special Cases".
ILT.6850
Did all indicators turn on momentarily (1 to 3 seconds
after power-on)?
Go To A15.9000
Agilent 8360
Continue
Continue
Instrument Level Troubleshooting 1a-119
ILT.6851
If you need to, repeat the sequence given in ILT.6811
to gather the following information. After power-on,
the four, left-most, A15 indicators will indicate a single
digital state or a sequence of digital states. Record each
state observed. The zero state (0000) is the most dicult
state to recognize: Observe all 12 indicators. If there is
activity in the other 8 indicators and the four, left-most
indicators are o, this is the zero state. However, if all 12
indicators are on 1 to 3 seconds after power-up, and then
all 12 indicators are o 2 to 5 seconds after power-up,
then this is not a zero state, it is correct performance.
After recording each state observed, compare them to the
following table. The state of the indicators is given in
priority. If you observed the rst state (0010), regardless
of where it occurred in the sequence, go to the paragraph
shown (A15.1200). If not, did you observe the next state
(0011)? If so, go to the paragraph shown. If not, continue
to use the table to identify, and then go to, the next
paragraph.
State of
Indicators
0010
0011
0100
0000
All Else
1a-120 Instrument Level Troubleshooting
Go To
Paragraph
A15.1200
A15.1300
A15.1400
A15.1100
A15.9000
Agilent 8360
ILT.6860
Go To A16.000
Continue
Go To A16.000
Go To A16.1000
ILT.6861
Agilent 8360
Instrument Level Troubleshooting 1a-121
ILT.6900
The most likely cause for this failure is the keyboard
assembly (A1.9000), but the front panel microprocessor
assembly (A3.9000) could also be at fault.
If these alternatives do not x the problem, use the
instrument block diagram (located at the end of \Special
Cases") to troubleshoot this problem.
1a-122 Instrument Level Troubleshooting
Agilent 8360
ILT.7000
Recall the calibration constants from EEPROM.
1. Press 4PRESET5 4SERVICE5.
2. Select Adjust Menu Calib Menu Cal Util Menu
Recall Cal yes .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNN
View calibration constant #463 (hardware conguration)
again:
If a password is set, you must know it to do this step.
1. Press 4PRESET5 4SERVICE5.
2. Select Adjust Menu .
3. If ENTER PASSWORD: 0 appears on the top line of the
display:
a. Enter the password.
b. Press 4ENTER5.
c. Select Adjust Menu .
4. Select Calib Menu Select Cal .
5. Press 44635 4ENTER5.
6. Note the value of calibration constant #463.
7. Note the options listed on the rear panel of the
instrument.
8. Note the model number of the instrument.
9. Using the options listed on the rear panel, the model
number, and the table below, calculate the hardware
conguration calibration constant (see the following
examples).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Agilent 8360
Instrument Level Troubleshooting 1a-123
Table 1a-4.
Hardware Conguration Cal Constants #463 and #464
Agilent Synthesizer
Model
Number
1
#463 Hardware
#464 Hardware
Cong 1
Cong 2
Starting Option Option Option Option Option Starting Option
Cal Constant 001 002 004 006 H101 Value 006
+4
+4096
+2
{
+1
+2
+4
+4096
+2
{
+1
+2
+4
+4096
0127
+1
+2
+4
+4096
06
06
{
+1
+2
+4
+4096
+2
{
+1
+2
+4
+4096
+2
0127
+1
+2
+19,888
0128
0128
0128
0128
0128
0128
0128
+4
+4096
+2
{
+1
+2
83621B
+30,864
{
{
{
{
{
{
{
83631B
+30,864
{
{
{
{
{
{
{
83651B
+32,176
{
{
{
{
{
{
{
83623L
+27,792
{
+4096
{
{
+1
{
83630L
+27,792
{
+4096
{
{
+1
{
83640L
+27,824
{
+4096
{
{
+1
{
83650L
+28,080
0128
0128
0128
0128
{
+4096
{
{
+1
{
83620B
+19,600
83622B
+19,584
83623B
+19,608
83624B
+19,592
83630B
+19,600
83640B
+19,632
83650B
Option H10 and all other options are mutually exclusive.
Example: Calibration constant #463
HP 83620B + 001 + 004 = ?
19,600
- 128 + 4096 = 23,568
Is the synthesizer hardware conguration number
correct?
Continue
1a-124 Instrument Level Troubleshooting
Go To ILT.111
Agilent 8360
ILT.7001
Since the hardware conguration number was incorrect
in both the working memory and EEPROM, it is likely
that this is not the only fault.
If you are sure the synthesizer hardware conguration
number is wrong, continue with the following key
sequence, otherwise go to paragraph ILT.113.
1. Select Modify Cal .
2. Input the correct calibration constant and press
4ENTER5.
3. Select Cal Util Menu Save Cal yes .
4. Press 4PRESET5.
Go to paragraph ILT.111.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNN
Agilent 8360
Instrument Level Troubleshooting 1a-125
ILT.7100
A custom or user preset can look like a failure especially
if the user preset is mistakenly implemented instead of
the factory preset. The following is a list of failures you
might encounter and some possible causes to look for in a
user preset:
Failures
Possible Causes
UNLOCK
External reference is selected, and:
*External reference is not 10 MHz at
0 dBm.
*External reference is not connected.
*Reference is connected incorrectly.
UNLVLED
LOW UNLVLED
External leveling is selected, and:
*There is no external ALC input.
*An improper external leveling point
is selected.
*The external ALC input is connected,
but the RF source
is turned o.
FFFFFFFFFFFFFFFF
*Leveling mode ALCoff is selected.
*There is an improper combination of
external ALC and ALC bandwidths.
Inaccurate RF
Power
External leveling or AM selected, and:
*ALC leveling search mode is selected.
*AM is selected with dc levels at the
AM input.
*An instrument without a front panel
has the RF output turned o.
Inaccurate
Frequency
DC FM, frequency oset or multiplier
is selected, and:
*DC FM is selected with a dc voltage
applied.
*A frequency oset is selected.
*A frequency multiplier is selected.
Sweep Does Not
Function
Single or external sweep is selected, and:
*External sweep trigger is selected.
*An improper external trigger is selected.
*Single sweep is selected.
Discontinue use of the user preset for the remainder of
your troubleshooting.
Go to ILT.112.
1a-126 Instrument Level Troubleshooting
Agilent 8360
ILT.7500
The source module makes three connections with the
8360 L-Series synthesizer:
The source module interface.
The RF output.
The external ALC connection. This is the shielded
connection that is part of the SMI connector.
If you are using a rear panel source module interface, go
to ILT.7700.
If you are using a front panel source module interface,
continue with ILT.7600.
ILT.7600
Using either an oscilloscope or a voltmeter, check the
following voltages at the front panel SMI connector.
Location
Measurement
Pin 7
+5.2 Vdc
Pin 5
+15.0 Vdc
Pin 10, 18, 19, 20 TTL High
Did all voltages pass?
Go To A2.9000
Agilent 8360
Continue
Instrument Level Troubleshooting 1a-127
ILT.7601
Perform the following setup:
Press 4PRESET5.
Press 4SWEEP TIME5 4105 4SEC5.
Using an oscilloscope or a voltmeter, check the following
voltages on front panel SMI connector. Note that pin 12
is a sweep ramp. To adjust the sweep time, use the front
panel controls (if you use an oscilloscope, try a sweep
time of approximately 100 ms).
Location
Measurement
Pin 15
015 Vdc
Pin 6
+8.0 Vdc
Pin 12
0 to 10 V Sweep Ramp
Did all voltages pass?
Go To ILT.7605
1a-128 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.7602
Measure at the center pin at each end of the cable.
Continue
Agilent 8360
Go To ILT.7604
ILT.7603
Replace the cable (W10) that connects the front
panel SMI input to the A10 assembly, and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
ILT.7604
An SMI or ALC connection does not seem to be a
problem. Go to paragraph ILT.7800.
ILT.7605
Either the front panel SMI (A2) or the ribbon cable
(W10) is faulty. Inspect the ribbon cable. Replace the A2
assembly (go to A2.9000) or replace W10, as required,
and go to the Troubleshooting Foldout, block 1 (located
just prior to the \Special Cases" tab).
Instrument Level Troubleshooting 1a-129
ILT.7700
Using either an oscilloscope or a voltmeter, check the
following voltages at the rear panel SMI connector.
Location
Measurement
Pin 7
+5.2 Vdc
Pin 5
+15.0 Vdc
Pin 10, 18, 19, 20 TTL High
Did all voltages pass?
Go To A19.9000
ILT.7701
Continue
Perform the following setup:
Press 4PRESET5.
Press 4SWEEP TIME5 4105 4SEC5.
Using an oscilloscope or a voltmeter, check the following
voltages on the rear panel SMI connector. Note that pin
12 is a sweep ramp. To adjust the sweep time, use the
front panel controls (if you use an oscilloscope, try a
sweep time of approximately 100 ms).
Location
1a-130 Instrument Level Troubleshooting
Measurement
Pin 15
015 Vdc
Pin 6
+8.0 Vdc
Pin 12
0 to 10 V Sweep Ramp
Agilent 8360
Did all voltages pass?
Go To ILT.7705
ILT.7702
Measure at the center pin at each end of the cable.
Continue
Agilent 8360
Continue
Go To ILT.7704
ILT.7703
Replace the cable (W23) that connects the rear panel SMI
input to the A10 assembly, and go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
ILT.7704
An SMI or ALC connection does not seem to be a
problem. Go to paragraph ILT.7800.
Instrument Level Troubleshooting 1a-131
ILT.7705
Either the rear panel SMI (A19) or the ribbon cable (W23)
is faulty. Inspect the ribbon cable. Replace the A19
assembly (go to A19.9000) or replace W23, as required,
and go to the Troubleshooting Foldout, block 1 (located
just prior to the \Special Cases" tab).
ILT.7800
Before performing this check, press 4PRESET5 4USER CAL5
and select FullUsr Cal . Wait until the instrument has
completed the tracking process. Using the source module
User's Handbook, determine the range of frequencies
and power levels provided by the synthesizer. Set the
synthesizer for a manual sweep over the specied
frequency range, at the specied power.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To ILT.2240
1a-132 Instrument Level Troubleshooting
Continue
Agilent 8360
ILT.7801
Agilent 8360
Since the previous tests didn't clearly isolate the
problem, the following is a prioritized list of the most
likely causes of failure:
1. Using the source module User's Handbook, verify that
the connections between the source module and the
synthesizer are correct.
2. Front/Rear Panel SMI (A2, A19) is faulty.
3. W2 is faulty (connects the A2 assembly to the
motherboard).
4. W31 is faulty (connects the A19 assembly to the
motherboard).
5. The ALC assembly (A10) is faulty. This may be true
only if leveling is the problem.
6. The source module is faulty. To conrm this, try to use
the unused SMI connector, or substitute a new source
module or synthesizer.
7. A remote possibility exists that the motherboard (A22)
has a fault.
If these alternatives do not x the problem, use the
instrument block diagram (located at the end of \Special
Cases") to troubleshoot this problem.
Instrument Level Troubleshooting 1a-133
ILT.8000
The best way to nd network analyzer problems is by
testing the input and output ports. To do this, refer to
paragraph ILT.3000. Each port is listed and can be tested
separately. The ports of interest in a network analyzer
will most likely be the following:
For instruments using Analyzer language, set the switch
to 1 (binary 001). If the instrument is used with 8510
systems, either set the language part of the switch to 1
or set the language to Analyzer language at the front
panel. This also applies to systems that depend on
8340/8341 compatibility.
Concerning the address switches, the 8510 (and other
systems) assume that the GPIB address is 19 (binary
10011).
Using the network analyzer's On-Site Service Handbook
verify that all connections between the 8510 and the
other instruments are correct.
RF output.
Stop sweep in/out.
Sweep output.
Trigger output.
GPIB.
Front or rear panel source module interface.
Auxiliary Interface.
If these alternatives do not x the problem, use the
instrument block diagram (located at the end of \Special
Cases") to troubleshoot this problem.
1a-134 Instrument Level Troubleshooting
Agilent 8360
Troubleshooting Modules A1.000 through
1b
AX.xxx
The following lists each troubleshooting section in this
chapter and the page number which the section begins.
A1 Front Panel Keyboard : : : : : : : : : : : : : : : : : : 1b-2
A2 Source Module Interface : : : : : : : : : : : : : : : 1b-4
A3 Front Panel Processor : : : : : : : : : : : : : : : : : 1b-19
A4 Fractional-N : : : : : : : : : : : : : : : : : : : : : : : : : : : 1b-22
A5 YO Loop : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1b-43
A6 Sampler : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1b-60
A7 Reference : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1b-77
A8 Modulation Generator : : : : : : : : : : : : : : : 1b-102
A9 Pulse : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1b-105
A10 ALC : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1b-122
A11 FM Driver : : : : : : : : : : : : : : : : : : : : : : : : : : : 1b-142
A12 Multiplier/Filter Driver : : : : : : : : : : : : : 1b-153
A13 YO Driver : : : : : : : : : : : : : : : : : : : : : : : : : : : 1b-173
A14 Sweep Generator : : : : : : : : : : : : : : : : : : : 1b-191
A15 CPU : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1b-202
A16, A17, A18 Power Supply : : : : : : : : : : : 1b-265
A17 Rectier/Filter Replacement : : : : : : : : 1b-379
A18 Preregulator Replacement : : : : : : : : : : 1b-380
A19 Rear Panel Interface : : : : : : : : : : : : : : : : 1b-381
A20 RF Interface : : : : : : : : : : : : : : : : : : : : : : : : 1b-399
A21 Display : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1b-412
A22 Motherboard Replacement : : : : : : : : : 1b-414
A23 10 MHz Reference Replacement : : : : 1b-415
Agilent 8360
Troubleshooting Modules 1b-1
A1 Front Panel Keyboard Troubleshooting
A1.000
When the full self-tests are run (from the service menu),
the keyboard test is not run. Only the keyboard to
A3 interface is tested. To test the keyboard, run the
following test.
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4215 4ENTER5.
4. Select Do Test #21 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
On the display you will see a dash (|) corresponding
to each front panel softkey and hardkey (except for
4PRESET5). Pressing a key causes the corresponding dash
to toggle to an 'X'. Each successive key press toggles the
'X' to the dash and back. In addition, the rotary knob
(RPG) toggles the two dashes in the upper right hand
corner of the display. The one that toggles depends on
the direction the RPG is turned.
To exit the test, press 4PRESET5.
If this test fails (the key press does not cause a toggle to
occur), you may still have a good keyboard. The front
panel processor provides the interface between the
keyboard and the rest of the instrument. A bad interface
could cause this test to fail. Go to A3.000 to check the
A3 to A1 interface.
1b-2 Troubleshooting Modules
A1 Front Panel Keyboard
A1.9000
A1 Front Panel Keyboard
Replace the A1 assembly.
Troubleshooting Modules 1b-3
A2 Source Module Interface Troubleshooting
A2.000
1b-4 Troubleshooting Modules
Message Displayed on Synthesizer
Go to
Paragraph
A2 : LED Control Latch
A2 : SMI Control Latch
A2 : SMI Sensing Circuit
A2.100
A2.200
A2.8000
A2 Source Module Interface
A2.100
A22J1 is located at the very front of the instrument
on the motherboard. Early versions of the A22J1
(motherboard) pins may be mislabeled. The square pad
correctly indicates pin 1.
Go To A2.1300
A2 Source Module Interface
Continue
Troubleshooting Modules 1b-5
A2.101
Loop self-test #232:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42325 4ENTER5.
4. Select Loop Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A2.1305
1b-6 Troubleshooting Modules
Continue
A2 Source Module Interface
A2.103
Loop self-test #233:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42335 4ENTER5.
4. Select Loop Do Test #233 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Check all signals listed below for TTL pulses at A22J1.
A22J1 is located at the very front of the instrument
on the motherboard. Early versions of the A22J1
(motherboard) pins may be mislabeled. The square pad
correctly indicates pin 1.
Signal
Location
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
A22J1-22
A22J1-21
A22J1-20
A22J1-19
A22J1-18
A22J1-17
A22J1-16
A22J1-15
If one or more signals do not have TTL pulses, the test
has failed. If all signals have TTL pulses, the test has
passed.
Go To A2.1310
A2 Source Module Interface
Continue
Troubleshooting Modules 1b-7
A2.104
Loop self-test #231:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42315 4ENTER5.
4. Select Loop Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Signal
Location
AB2
AB3
AB4
AB5
AB6
A22J1-28
A22J1-27
A22J1-26
A22J1-25
A22J1-23
If one or more signals do not have TTL pulses, the test
has failed. If all signals have TTL pulses, the test has
passed.
Go To A2.1315
1b-8 Troubleshooting Modules
Go To A2.8000
A2 Source Module Interface
A2.200
A22J1 is located at the very front of the instrument
on the motherboard. Early versions of the A22J1
(motherboard) pins may be mislabeled. The square pad
correctly indicates pin 1.
Go To A2.1320
Continue
A2.201
Go To A2.1325
A2 Source Module Interface
Go To A2.8000
Troubleshooting Modules 1b-9
A2.1300
There is an open on the motherboard between A22J1-32
and XA17J1-4, 5, 6, 34, 35, or 36. Verify this with an
ohmmeter. Is jumpering an acceptable repair?
Go To A22.9000
Continue
A2.1301
Install a jumper. Then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A2.1305
Go To A15.9000
1b-10 Troubleshooting Modules
Continue
A2 Source Module Interface
A2.1306
There is an open on the motherboard between A22J1-31
and XA15J1-1. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A2.1307
Install a jumper. Then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A2.1310
Check all signals listed below for TTL pulses at XA15J1.
Signal
Location
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
XA15J1-12
XA15J1-52
XA15J1-13
XA15J1-53
XA15J1-14
XA15J1-54
XA15J1-15
XA15J1-55
If one or more signals do not have TTL pulses, the test
has failed. If all signals have TTL pulses, the test has
passed.
Go To A15.9000
A2 Source Module Interface
Continue
Troubleshooting Modules 1b-11
A2.1311
There is an open on the motherboard data bus between
A22J1 and XA15J1. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A2.1312
Select the failing signals and install jumpers as required.
Signal
A2 Location
A15 Location
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
A22J1-22
A22J1-21
A22J1-20
A22J1-19
A22J1-18
A22J1-17
A22J1-16
A22J1-15
XA15J1-12
XA15J1-52
XA15J1-13
XA15J1-53
XA15J1-14
XA15J1-54
XA15J1-15
XA15J1-55
When the repair is complete, go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
1b-12 Troubleshooting Modules
A2 Source Module Interface
A2.1315
Check all signals listed below for TTL pulses at XA15J1.
Signal
AB2
AB3
AB4
AB5
AB6
Location
XA15J1-8
XA15J1-48
XA15J1-9
XA15J1-49
XA15J1-10
If one or more signals do not have TTL pulses, the test
has failed. If all signals have TTL pulses, the test has
passed.
Go To A15.9000
Continue
A2.1316
There is an open on the motherboard data bus between
A22J1 and XA15J1. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
A2 Source Module Interface
Continue
Troubleshooting Modules 1b-13
A2.1317
Select the failing signals and install jumpers as required.
Signal
A2 Location
A15 Location
AB2
AB3
AB4
AB5
AB6
A22J1-28
A22J1-27
A22J1-26
A22J1-25
A22J1-23
XA15J1-8
XA15J1-48
XA15J1-9
XA15J1-49
XA15J1-10
When the repair is complete, go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
A2.1320
Go To A16.9000
1b-14 Troubleshooting Modules
Continue
A2 Source Module Interface
A2.1321
There is an open on the motherboard between A22J1-1
and XA16J1-30, 31, 70, or 71. Verify this with an
ohmmeter. Is jumpering an acceptable repair?
Go To A22.9000
Continue
A2.1322
Install a jumper. Then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A2.1325
Go To A16.9000
A2 Source Module Interface
Continue
Troubleshooting Modules 1b-15
A2.1326
There is an open on the motherboard between A22J1-29
and XA16J1-18, 19, 58, or 59. Verify this with an
ohmmeter. Is jumpering an acceptable repair?
Go To A22.9000
Continue
A2.1327
Install a jumper. Then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-16 Troubleshooting Modules
A2 Source Module Interface
A2.8000
Perform the following tasks:
1. Remove front panel.
2. Completely remove W2 (W2 connects A2 to the
motherboard).
3. Using an ohmmeter, check W2.
Is W2 Faulty?
Go To A2.9000
Continue
A2.8500
Replace W2. You may want to consider replacing the A2
assembly. Then go to Troubleshooting Foldout, block 1
(located just prior to the \Special Cases" tab).
A2 Source Module Interface
Troubleshooting Modules 1b-17
A2.9000
1b-18 Troubleshooting Modules
Replace the A2 assembly.
A2 Source Module Interface
A3 Front Panel Processor Troubleshooting
A3.000
A3 Front Panel Processor
The front panel processor (A3) serves as an interface
between the rest of the instrument and the display
(A21) and keyboard (A1). Go to A21.000 for display
testing. Keyboard testing is given in A1.000, however,
the following is an additional test that checks whether
the keyboard can communicate with the front panel
processor.
Perform the following key sequence:
1. Turn the line power switch to on.
2. Press 4PRESET5 and any other key together.
3. Release 4PRESET5 and then release the other key.
4. Look at the top edge of the front panel processor
just to the left of the rotary knob (RPG). A series of
six indicators should be visible. To observe the data
interchange between the keyboard and the front panel
processor, press a key and you should see the key code
change. The indicators should change each time you
press a dierent key.
Troubleshooting Modules 1b-19
The following selected key sequences do a good job of
checking the interface between A3 and A1. If these (or
others) are faulty, the problem will be A3, A1, or the
connecting ribbon cable (W5).
Key
Indicators1
495
101 101
010 010
100 000
010 000
110 000
001 000
101 000
000 001
000 010
000 100
111 110
011 011
4CENTER5
First (left-most) Softkey
Second Softkey
Third Softkey
Fourth Softkey
Fifth Softkey
4ENTRY
ON/OFF5
4CW5
USER DEFINED 4MENU5
4PRIOR5
SYSTEM 4RECALL5
1
1b-20 Troubleshooting Modules
1=ON, 0=OFF
A3 Front Panel Processor
A3.9000
A3 Front Panel Processor
Replace the A3 assembly.
Troubleshooting Modules 1b-21
A4 Fractional-N Troubleshooting
A4.000
Message Displayed on Synthesizer
A4 :
A4 :
A4 :
A4 :
A4 :
A4 :
A4 :
1b-22 Troubleshooting Modules
03.25V Supply
Tuning Range
FNGO Control
+2.2V Supply
Sweep Test
Switching Speed
Monotonicity
Go to
Paragraph
A4.200
A4.300
A4.400
A4.9000
A4.9000
A4.9000
A4.9000
A4 Fractional-N
A4.200
Go To A4.1330
Continue
A4.201
Go To A4.1300
A4 Fractional-N
Go To Continue
Troubleshooting Modules 1b-23
A4.202
Go To A4.1305
Continue
A4.203
Loop self-test #232:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42325 4ENTER5.
4. Select Loop Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1b-24 Troubleshooting Modules
A4 Fractional-N
Go To A4.1310
A4 Fractional-N
Continue
Troubleshooting Modules 1b-25
A4.204
Loop self-test #231:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42315 4ENTER5.
4. Select Loop Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A4.1315
1b-26 Troubleshooting Modules
Continue
A4 Fractional-N
A4.205
Go To A4.1325
A4 Fractional-N
Go To A4.9000
Troubleshooting Modules 1b-27
A4.300
The pulse width is 10 to 20 ns. The frequency is 125 kHz.
The oscilloscope must present a 50
load. Do not use a
high impedance probe. The combination of low frequency
and narrow pulse width makes this a very dicult
pulse to see. Do not use a frequency counter to check
frequency, because of the tendency to count the second
harmonic.
Go To A4.320
1b-28 Troubleshooting Modules
Continue
A4 Fractional-N
A4.301
Go To A4.1305
Continue
A4.302
Perform the following setup:
1. Turn the synthesizer o.
2. Remove the A4 assembly.
3. Turn the synthesizer on.
4. Press 4PRESET5 4CW5 4SERVICE5.
5. Select Unlock Info .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Does FRACN indicate OK?
Go To A4.1335
A4 Fractional-N
Continue
Troubleshooting Modules 1b-29
A4.303
Perform the following setup:
1. Carefully short XA4J1-50 to ground (A4 should still be
removed).
2. Select Unlock Info Unlock Info (press
Unlock Info twice to reacquire data).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Does FRACN indicate UNLOCK?
Go To A4.1335
1b-30 Troubleshooting Modules
Continue
A4 Fractional-N
A4.304
Perform the following setup:
1. Turn the synthesizer o.
2. Re-install the A4 assembly and reconnect the cables.
3. Turn the synthesizer on.
Loop self-test #35:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4355 4ENTER5.
4. Select Loop Do Test #35 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A4.9000
A4 Fractional-N
Continue
Troubleshooting Modules 1b-31
A4.305
Go To A4.1320
Continue
A4.306
Go To A4.1325
1b-32 Troubleshooting Modules
Go To A4.9000
A4 Fractional-N
A4.307
Do self-test #29:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4295 4ENTER5.
4. Select Do Test #29 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Did self-test #29 pass?
Go To A4.9000
Continue
A4.308
Go to \Instrument Level Troubleshooting."
A4 Fractional-N
Troubleshooting Modules 1b-33
A4.320
The frequency is 10 MHz. The oscilloscope must present a
50 load. Do not use a high impedance probe.
Go To A7.9000
Continue
A4.321
Replace W11 (A7J5 to A4J1) and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
1b-34 Troubleshooting Modules
A4 Fractional-N
A4.400
Loop self-test #37:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4375 4ENTER5.
4. Select Loop Do Test #37 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A4.1340
A4 Fractional-N
Go To A4.9000
Troubleshooting Modules 1b-35
A4.1300
There is an open on the motherboard between XA4J1-15,
16, 40, or 41 and XA7J1-15, 16, 40, or 41. Verify this
with an ohmmeter. Is jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1301
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A4.1305
There is an open on the motherboard between XA4J1-43
and XA7J1-43. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1306
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-36 Troubleshooting Modules
A4 Fractional-N
A4.1310
Go To A15.9000
Continue
A4.1311
There is an open on the motherboard between XA4J1-26
and XA15J1-2. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1312
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A4 Fractional-N
Troubleshooting Modules 1b-37
A4.1315
Go To A15.9000
Continue
A4.1316
There is an open on the motherboard between XA4J1-4
and XA15J1-7. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1317
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-38 Troubleshooting Modules
A4 Fractional-N
A4.1320
Go To A15.9000
Continue
A4.1321
There is an open on the motherboard between XA4J1-29
and XA15J1-52. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1322
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A4 Fractional-N
Troubleshooting Modules 1b-39
A4.1325
Go To A15.9000
Continue
A4.1326
There is an open on the motherboard between XA4J1-31
and XA15J1-49. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1327
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-40 Troubleshooting Modules
A4 Fractional-N
A4.1330
There is an open on the motherboard between XA4J2-11,
12, 41, or 42 and XA7J2-11, 12, 41, or 42. Verify this
with an ohmmeter. Is jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1331
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A4.1335
Using an ohmmeter, measure the resistance from
XA4J1-50 to XA15J1-77.
Is the resistance less than or equal to 2 ?
Continue
A4 Fractional-N
Go To A15.9000
Troubleshooting Modules 1b-41
A4.1336
There is an open on the motherboard between XA4J1-50
and XA15J1-77. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1337
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A4.1340
Go To A14.9000
1b-42 Troubleshooting Modules
Continue
A4 Fractional-N
A4.1341
There is an open on the motherboard between XA4J1-2
and XA14J1-5. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1342
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A4 Fractional-N
Troubleshooting Modules 1b-43
A4.9000
1b-44 Troubleshooting Modules
Replace the A4 assembly.
A4 Fractional-N
A5 YO Loop Troubleshooting
A5.000
A5 YO Loop
Message Displayed on Synthesizer
Go to
Paragraph
A5 :
A5 :
A5 :
A5 :
A5 :
A5 :
A5 :
A5 :
A5 :
A5 :
A5.100
A5.200
A5.300
A5.400
A5.500
A5.600
A5.8500
A5.8500
A5.8500
A5.8500
Digital Interface
ABUS Ground
Switched Amplier
IF Frequency Counter
Integrator
Overmod Detector
Phase Detector
Output to YO Driver
Output to FM Coil
Track and Hold
Troubleshooting Modules 1b-45
A5.100
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42315 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A5.8500
A5.110
Go To A15.9000
1b-46 Troubleshooting Modules
Continue
A5 YO Loop
A5.111
There is an open on the motherboard between XA5J1-7
and XA15J1-10. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A5.112
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A5 YO Loop
Troubleshooting Modules 1b-47
A5.200
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5 4CW5.
2. Select Selftest Menu .
3. Press 4495 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #49 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Verify that portions of the signal are 700 mV. However,
expect other portions of the signal to rise to levels of up
to 15 Vdc. This is not a failure as long as portions of the
signal are 700 mV.
Go To A5.8500
1b-48 Troubleshooting Modules
Continue
A5 YO Loop
A5.220
Verify that portions of the signal are 700 mV. However,
expect some portions of the signal to rise to levels of up
to 15 Vdc. This is not a failure as long as portions of the
signal are 700 mV.
Continue
Go To A15.9000
A5.221
There is an open on the motherboard between XA5J2-22
and XA15J2-24. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A5.222
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A5 YO Loop
Troubleshooting Modules 1b-49
A5.300
The instrument may be showing an UNLOCK message. If
so, the keyboard response will be very sluggish. This is
normal. Also, the frequency may be somewhat unstable.
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Tools Menu CntlPLL Menu Sampler Menu
Sampler Freq .
3. Press 42005 4MHz5.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
1b-50 Troubleshooting Modules
Go To A5.8500
A5 YO Loop
A5.301
Go To A6.9000
Go To A5.302
A5.302
Replace W13 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A5 YO Loop
Troubleshooting Modules 1b-51
A5.400
Perform the following key sequence:
1. Press 4PRESET5 4CW5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4515 4ENTER5.
4. Select Loop (asterisk on)
5. Select Do Test #51 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Note that this TTL signal cycles about every one to three
seconds. It is a low duty cycle, low frequency signal that
is dicult to see.
Go To A5.410
1b-52 Troubleshooting Modules
Continue
A5 YO Loop
A5.401
Set up the following measurement and look for a very
slow-moving TTL signal.
Go To A5.8500
Continue
A5.402
Set up the following measurement and look for a very
slow-moving TTL signal.
Continue
A5 YO Loop
Go To A14.9000
Troubleshooting Modules 1b-53
A5.403
There is an open on the motherboard between XA5J1-25
and XA14J1-36. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A5.404
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A5.410
Go To A14.9000
1b-54 Troubleshooting Modules
Continue
A5 YO Loop
A5.411
There is an open on the motherboard between XA5J1-24
and XA14J1-75. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A5.412
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A5 YO Loop
Troubleshooting Modules 1b-55
A5.500
Perform the following key sequence:
1. Press 4PRESET5 4CW5 4SERVICE5.
2. Select Tools Menu CntlPLL Frac N Menu CW .
3. To enter a frequency, press 4XXXX5 4ENTER5
where XXX is the frequency of the fractional-N loop. The
frequency of the fractional-N loop is valid from 30 MHz
to 60 MHz.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNN
Continue
Go To A5.8500
A5.501
Go To A4.9000
1b-56 Troubleshooting Modules
Continue
A5 YO Loop
A5.502
Replace W12 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A5 YO Loop
Troubleshooting Modules 1b-57
A5.600
On the synthesizer, press 4PRESET5.
Go To A5.8500
Continue
A5.601
Continue
1b-58 Troubleshooting Modules
Go To A15.9000
A5 YO Loop
A5.602
There is an open on the motherboard between XA5J1-49
and XA15J1-75. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A5.603
Install a jumper. Then go to Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A5 YO Loop
Troubleshooting Modules 1b-59
A5.8500
Are all ve switch positions on A5S1 open?
Continue
Go To A5.9000
A5.8501
Open all ve switch positions on A5S1 and rerun
self-tests. If the same failure occurs as the original
failure, go to A5.9000 and replace A5. If the same failure
does not occur, go to the Troubleshooting Foldout, block 1
(located just prior to the \Special Cases" tab.)
1b-60 Troubleshooting Modules
A5 YO Loop
A5.9000
A5 YO Loop
Replace the A5 assembly.
Troubleshooting Modules 1b-61
A6 Sampler Troubleshooting
A6.000
1b-62 Troubleshooting Modules
Message Displayed on Synthesizer
Go to
Paragraph
A6 :
A6 :
A6 :
A6 :
A6 :
A6 :
A6 :
A6 :
A6 :
A6 :
A6 :
A6 :
A6.100
A6.200
A6.300
A6.400
A6.500
A6.9000
A6.9000
A6.9000
A6.9000
A6.9000
A6.9000
A6.9000
ABUS Ground
UNLOCK Detector
Phase Amplier
IF Output Level
VTUNE Endpoints
Loop Integrator
Loop Gain DAC
PAL Check
IF Amplier Bias
Speed-up Circuit
VTUNE Monotonicity
Switching Speed
A6 Sampler
A6.100
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42325 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A6.110
A6 Sampler
Continue
Troubleshooting Modules 1b-63
A6.101
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4665 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #66 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Verify a signal of 700 mV. However, expect some
portions of the signal to rise to levels of up to 15 Vdc.
This is not a failure as long as the signal is primarily
700 mV.
Go To A6.9000
1b-64 Troubleshooting Modules
Go To A6.120
A6 Sampler
A6.110
Go To A15.9000
Continue
A6.111
There is an open on the motherboard between XA6J1-26
and XA15J1-42. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A6.112
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A6 Sampler
Troubleshooting Modules 1b-65
A6.120
Verify a signal of 700 mV. However, expect some
portions of the signal to rise to levels of up to 15 Vdc.
This is not a failure as long as the signal is primarily
700 mV.
Continue
Go To A15.9000
A6.121
There is an open on the motherboard between XA6J1-23
and XA15J1-25. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A6.122
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-66 Troubleshooting Modules
A6 Sampler
A6.200
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4675 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #67 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
The signal should be dominated by a TTL low. Some TTL
highs may be present. A failure is dened as a signal
with no TTL lows.
Go To A6.9000
A6 Sampler
Continue
Troubleshooting Modules 1b-67
A6.201
The signal should be dominated by a TTL low. Some TTL
highs may be present. A failure is dened as a signal
with no TTL lows.
Continue
Go To A15.9000
A6.202
There is an open on the motherboard between XA6J1-50
and XA15J1-38. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A6.203
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-68 Troubleshooting Modules
A6 Sampler
A6.300
Is Option 002 installed?
Continue
Go To A6.310
A6.301
Set up the oscilloscope for 50 input impedance.
Continue
A6 Sampler
Go To A6.9000
Troubleshooting Modules 1b-69
A6.302
Go To A7.9000
Continue
A6.303
Replace W15 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A6.310
Set up the oscilloscope for 50 input impedance.
Continue
1b-70 Troubleshooting Modules
Go To A6.9000
A6 Sampler
A6.311
The most likely cause of the failure is W65. Replace
W65 (from A8J2 to A6J1) and go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab). If this does not solve the problem, replace A8.
A6 Sampler
Troubleshooting Modules 1b-71
A6.400
Set up for power measurement:
1. Set the power switch to standby.
2. Remove the top and bottom covers.
3. Turn the synthesizer power on.
4. Press 4PRESET5 4CW5 4SERVICE5.
5. Select Tools Menu CntlPLL Menu NoPhaseLock
(asterisk on).
6. Select LoopCntl Menu YO Loop Freq .
7. Press 425 4GHz5.
8. Using the rotary knob, sweep the frequency from
2.0 to 7.4 GHz and verify that power is greater than
025 dBm.
Set up for frequency measurement:
1. Press 425 4GHz5.
2. Using 485, increment the frequency.
3. The measured frequency equals the front panel
indication 6 40 MHz (2.0 to 7.4 GHz).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
1b-72 Troubleshooting Modules
Go To A6.410
A6 Sampler
A6.401
Set up for power measurement:
1. Reconnect any disconnected cables.
2. Put the RF deck in the service position.
3. Remove the 15 dB attenuator (AT3) from the
directional coupler (A39).
4. Press 4PRESET5 4CW5 4SERVICE5.
5. Select Tools Menu CntlPLL Menu NoPhaseLock
(asterisk on).
6. Select LoopCntl Menu YO Loop Freq .
7. Press 425 4GHz5.
8. Using the rotary knob, sweep the frequency from
2 to 7.4 GHz and verify that power is 07 dBm.
Set up for frequency measurement:
1. Press 425 4GHz5.
2. Using 485, increment the frequency.
3. The measured frequency equals the front panel
Indication 6 40 MHz (2 to 7.4 GHz).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A6 Sampler
Go To A6.420
Troubleshooting Modules 1b-73
A6.402
Set up for power measurement:
1. Reconnect any disconnected cables.
2. Put the RF deck in the service position.
3. Remove W52 (connects the YIG oscillator, A26, to the
directional coupler (A39).
4. Press 4PRESET5 4CW5 4SERVICE5.
5. Select Tools Menu CntlPLL Menu NoPhaseLock
(asterisk on).
6. Select LoopCntl Menu YO Loop Freq .
7. Press 425 4GHz5.
8. Using the rotary knob, sweep the frequency from
2.0 to 7.4 GHz and verify that power is 8 dBm.
Set up for frequency measurement:
1. Press 425 4GHz5.
2. Using 485, increment the frequency.
3. The measured frequency equals the front panel
indication 6 40 MHz (2.0 to 7.4 GHz).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To RF.2690
1b-74 Troubleshooting Modules
Continue
A6 Sampler
A6.403
Check W52 for damage, deformation, or excessive RF
path loss.
Is W52 defective?
Go To RF.3990
Continue
Replace W52 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A6.410
Remove A6 from the synthesizer and disconnect W54
from A6. Inspect and test W54 for defects.
Is W54 defective?
Go To A6.9000
Continue
Replace W54 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A6 Sampler
Troubleshooting Modules 1b-75
A6.420
There is a high-loss path between the directional coupler
(A39) and the sampler (A6). This path includes two
hard lines (W54, W51), a low pass lter (FL2), and
an attenuator (AT3). The most likely failure is a poor
connection. Correct the faulty connection or replace the
faulty part (W54, FL2, W51, AT3). Isolate and replace the
faulty component and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
To check for excessive loss in a cable or lter, connect
the component input to a known-good signal for the
frequency bands in question (see the block diagram
located behind the \Troubleshooting Block Diagrams" tab)
and test the output. Over the frequency range of 2.0 to
8.0 GHz, the loss for a coaxial cable should be 2.0 dB;
the loss for a lter should be 4.0 dB.
1b-76 Troubleshooting Modules
A6 Sampler
A6.500
Refer to the calibration manual. Perform the following
adjustments and return.
A6 VCO Tune.
A6 Sampler Match.
A6 Loop Gain.
A6 IF Gain.
Were you able to perform the adjustments?
Go To A6.9000
Continue
A6.501
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4655 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #65 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Use the rotary knob to review the results of the A6
self-tests. If any A6 self-tests fail, go to A6.9000.
Otherwise, go to the Troubleshooting Foldout, block 1
(located just prior to the \Special Cases" tab).
A6 Sampler
Troubleshooting Modules 1b-77
A6.9000
1b-78 Troubleshooting Modules
Replace the A6 assembly.
A6 Sampler
A7 Reference Troubleshooting
A7.000
A7 Reference
Message Displayed on Synthesizer
Go to
Paragraph
A7 :
A7 :
A7 :
A7 :
A7 :
A7 :
A7 :
A7 :
A7 :
A7 :
A7 :
A7.100
A7.200
A7.300
A7.400
A7.500
A7.9000
A7.9000
A7.9000
A7.9000
A7.9000
A7.9000
ABUS Ground
012V Supply
10 MHz Standard Input
UNLOCK Detector
EXT Reference Switch
+5V Supply
05V Supply
Open Loop VTUNE
40 MHz Output
125 kHz Output
INT Reference Switch
Troubleshooting Modules 1b-79
A7.100
Go To A7.1300
Continue
A7.101
Loop self-test #231:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42315 4ENTER5.
4. Select Loop Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1b-80 Troubleshooting Modules
A7 Reference
A7.102
Go To A4.1305
Continue
A7.103
Go To A4.1310
A7 Reference
Continue
Troubleshooting Modules 1b-81
A7.104
Go To A4.1315
Continue
A7.105
Go To A7.1320
1b-82 Troubleshooting Modules
Continue
A7 Reference
A7.106
Loop self-test #232:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42325 4ENTER5.
4. Select Loop Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
A7.107
Go To A7.1325
A7 Reference
Continue
Troubleshooting Modules 1b-83
A7.108
Go To A7.1330
Continue
A7.109
Log self-test #86 to display always:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4865 4ENTER5.
4. Select Log (asterisk on).
5. Select Output Menu When to Log Always (asterisk
on).
6. Press 4PRIOR5.
7. Select Do Test #86 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1b-84 Troubleshooting Modules
A7 Reference
A7.110
Go To A7.9000
Continue
A7.111
Go To A7.1335
A7 Reference
Go To A15.8500
Troubleshooting Modules 1b-85
A7.200
Go To A7.1330
1b-86 Troubleshooting Modules
Go To A7.9000
A7 Reference
A7.300
Continue
Go To A7.9000
A7.301
Perform the following setup:
1. Set the synthesizer to standby.
2. Unplug the synthesizer.
3. Remove the 8 screws holding the rear panel, and tilt
the rear panel back to access A23 (the reference
oscillator).
4. Temporarily replace W17 (connects A23J1 to A7J2)
with W15 (connects A6J2 to A5J1).
5. Replace the rear panel with W15 in place of W17.
6. Plug in the synthesizer.
7. Turn the synthesizer on.
A7 Reference
Troubleshooting Modules 1b-87
A7.302
Continue
Go To A7.304
A7.303
Go to A23.000 (troubleshoot the 10 MHz reference).
A7.304
Replace W17 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-88 Troubleshooting Modules
A7 Reference
A7.400
Loop self-test #94:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4945 4ENTER5.
4. Select Loop Do Test #94 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
A7.401
Check for a TTL signal with a period of 1.5 to
3.0 seconds.
Go To A7.9000
A7 Reference
Go To A7.1340
Troubleshooting Modules 1b-89
A7.500
Are you using an external standard?
Go To A7.520
Continue
A7.501
Continue
Go To A7.503
A7.502
The external standard is faulty. Correct the external
reference (see instrument specications) and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
1b-90 Troubleshooting Modules
A7 Reference
A7.503
Continue
Go To A7.505
A7.504
Replace W16 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A7.505
Go To A7.9000
A7 Reference
Go To A7.1345
Troubleshooting Modules 1b-91
A7.520
Go To A7.9000
1b-92 Troubleshooting Modules
Go To A7.1346
A7 Reference
A7.1300
Go To A16.9000
Continue
A7.1301
There is an open on the motherboard between XA7J1-43
and XA16J1-76. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A7.1302
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A7 Reference
Troubleshooting Modules 1b-93
A7.1305
Go To A15.9000
Continue
A7.1306
There is an open on the motherboard between XA7J1-4
and XA15J1-7. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A7.1307
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-94 Troubleshooting Modules
A7 Reference
A7.1310
Go To A15.9000
Continue
A7.1311
There is an open on the motherboard between XA7J1-29
and XA15J1-47. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A7.1312
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A7 Reference
Troubleshooting Modules 1b-95
A7.1315
Go To A15.9000
Continue
A7.1316
There is an open on the motherboard between XA7J1-31
and XA15J1-49. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A7.1317
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-96 Troubleshooting Modules
A7 Reference
A7.1320
Go To A15.9000
Continue
A7.1321
There is an open on the motherboard between XA7J1-7
and XA15J1-10. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A7.1323
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A7 Reference
Troubleshooting Modules 1b-97
A7.1325
Go To A15.9000
Continue
A7.1326
There is an open on the motherboard between XA7J1-26
and XA15J1-42. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A7.1327
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-98 Troubleshooting Modules
A7 Reference
A7.1330
Go To A16.9000
Continue
A7.1331
There is an open on the motherboard between XA7J2-41
or 42 and XA16J1-25, 26, 65, or 66. Verify this with an
ohmmeter. Is jumpering an acceptable repair?
Go To A22.9000
Continue
A7.1332
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A7 Reference
Troubleshooting Modules 1b-99
A7.1335
There is an open on the motherboard between XA7J2-22
and XA15J2-24. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A7.1336
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A7.1340
Check for a TTL signal with a period of 1.5 to
3.0 seconds.
Continue
1b-100 Troubleshooting Modules
Go To A15.9000
A7 Reference
A7.1341
There is an open on the motherboard between XA7J1-25
and XA15J1-36. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A7.1342
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A7.1345
Go To A7.1347
A7 Reference
Go To A15.9000
Troubleshooting Modules 1b-101
A7.1346
Continue
Go To A15.9000
A7.1347
There is an open on the motherboard between XA7J1-24
and XA15J1-37. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A7.1348
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-102 Troubleshooting Modules
A7 Reference
A7.9000
A7 Reference
Replace the A7 assembly.
Troubleshooting Modules 1b-103
A8 Modulation Generator Troubleshooting
A8.000
1b-104 Troubleshooting Modules
Message Displayed on Synthesizer
Go to
Paragraph
A8 :
A8 :
A8 :
A8 :
A8 :
A8 :
A8.100
A8.9000
A8.9000
A8.9000
A8.9000
A8.9000
VCXO Locking
Pulse Generator
AM Generator
FM Generator
Monitor Output
Peak Detector
A8 Modulation Generator
A8.100
Set up the oscilloscope for a 50 input impedance.
Continue
Go To A6.320
A8.101
Go To A7.9000
Continue
A8.102
Replace W15 (from A7J6 to A8J1) and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A8 Modulation Generator
Troubleshooting Modules 1b-105
A8.9000
1b-106 Troubleshooting Modules
Replace the A8 assembly.
A8 Modulation Generator
A9 Pulse Troubleshooting
A9.000
Note
A9 Pulse
Message Displayed on Synthesizer
Go to
Paragraph
A9 :
A9 :
A9 :
A9 :
A9 :
A9 :
A9 :
A9 :
A9.200
A9.300
A9.400
A9.500
A9.600
A9.600
A9.600
A9.9000
Squegging Clamp
Modulator Selection
Integrate/Hold Switch
SRD Bias Generator
Detector Track/Hold
Control Gating
Ramp Bias
Slow Pulse Drive
L Models only. Before proceeding, check selftest patch
values listed in the adjustment section of the Agilent
Technologies 8360 L-Series Swept CW Generator User's
Guide.
Troubleshooting Modules 1b-107
A9.200
Press 4PRESET5.
Continue
Go To A9.210
A9.201
Go To A10.9000
1b-108 Troubleshooting Modules
Continue
A9 Pulse
A9.202
There is an open on the motherboard between XA9J1-25
and XA10J1-25. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A9.203
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A9.210
Perform the following setup and key sequence:
1. Remove the A10 ALC assembly from the card cage.
2. Press 4PRESET5 4SERVICE5.
3. Select Selftest Menu .
4. Press 41105 4ENTER5.
5. Select Loop (asterisk on).
6. Select Output Menu Always (asterisk on).
7. Press 4PRIOR5.
8. Select Do Test #110 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Does test #110 pass with the A10 ALC assembly
removed?
Go To A9.9000
A9 Pulse
Go To RF.3890
Troubleshooting Modules 1b-109
A9.300
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41085 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #108 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A9.310
Continue
A9.301
Go To A9.320
1b-110 Troubleshooting Modules
Continue
A9 Pulse
A9.302
Do the following:
1. Select Loop (asterisk o).
2. Disconnect W32 from A22J3 and disconnect W33 from
A22J4. (These cables are located between the RF deck
and the card cage.)
3. Select Do Test #108 .
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Did self-test #108 pass?
Go To A9.9000
Continue
A9.303
Do the following:
1. Reconnect W32 to A22J3.
2. Select Do Test #108 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Did self-test #108 pass?
Continue
Go To A9.307
A9.304
Is Option 006 installed?
Continue
A9 Pulse
Go To A9.309
Troubleshooting Modules 1b-111
A9.305
Do the following:
1. Disconnect W32 from A38J3.
2. Select Do Test #108 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Did self-test #108 pass?
Continue
Go To RF.3890
A9.306
Replace W32 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A9.307
Do the following:
1. Reconnect W33 to A22J4.
2. Disconnect W33 from A24J6.
3. Select Do Test #108 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Did self-test #108 pass?
Continue
Go To RF.2490
A9.308
Replace W33 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-112 Troubleshooting Modules
A9 Pulse
A9.309
Do the following:
1. Disconnect W32 from A42J3.
2. Select Do Test #108 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Did self-test #108 pass?
Go To A9.306
Go To RF.4290
A9.310
Go To A10.9000
Continue
A9.311
There is an open on the motherboard between XA9J1-50
and XA10J1-50. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
A9 Pulse
Continue
Troubleshooting Modules 1b-113
A9.312
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A9.320
Go To A10.9000
Continue
A9.321
There is an open on the motherboard between XA9J1-49
and XA10J1-49. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A9.322
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-114 Troubleshooting Modules
A9 Pulse
A9.400
Is Option 002 installed?
Continue
Go To A9.410
A9.401
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41055 4ENTER5.
4. Select Loop (asterisk on).
5. Press 4PRIOR5.
6. Select Do Test #105 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A9 Pulse
Go To A9.9000
Troubleshooting Modules 1b-115
A9.402
Go To A14.9000
Continue
A9.403
There is an open on the motherboard between XA9J1-1
and XA14J1-4. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A9.404
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-116 Troubleshooting Modules
A9 Pulse
A9.410
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41055 4ENTER5.
4. Select Loop (asterisk on).
5. Press 4PRIOR5.
6. Select Do Test #105 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A9 Pulse
Go To A9.9000
Troubleshooting Modules 1b-117
A9.411
Go To A8.9000
Continue
A9.412
Replace W66 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-118 Troubleshooting Modules
A9 Pulse
A9.500
Perform the following key sequence:
1. Press 4PRESET5.
2. 4START5 42.35 4GHz5.
3. 4STOP5 47.05 4GHz5.
Ensure when viewing the waveform that the input to the
oscilloscope is DC coupled. An AC coupled input may
distort the waveform.
Continue
Go To A9.510
A9.501
Go To A13.9000
A9 Pulse
Continue
Troubleshooting Modules 1b-119
A9.502
There is an open on the motherboard between XA9J2-56
and XA13J2-56. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A9.503
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A9.510
Using the disassembly and replacement procedures, lift
the RF deck into the service position. Check the ribbon
cable that connects the amp/multiplier (A28) to the RF
interface board (A20) for any damage. Disconnect the
ribbon cable from the amp/multiplier.
Perform the following test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41125 4ENTER5.
4. Select Do Test #112 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Did self-test #112 pass?
Continue
1b-120 Troubleshooting Modules
Go To RF.2890
A9 Pulse
A9.511
The problem is most likely the A9 pulse board. However,
the ribbon cable between the RF interface board,
A20, and the amp/multiplier, A28, could be damaged.
Carefully inspect the ribbon cable before replacing A9.
A9 Pulse
Troubleshooting Modules 1b-121
A9.600
These self-tests apply to instruments of an earlier
vintage than documented in this manual. Refer to the
Assembly-Level Repair manual (part number 08360-90060)
for troubleshooting.
1b-122 Troubleshooting Modules
A9 Pulse
A9.9000
A9 Pulse
Replace the A9 assembly.
Troubleshooting Modules 1b-123
A10 ALC Troubleshooting
A10.000
Message Displayed on Synthesizer
A10 :
A10 :
A10 :
A10 :
A10 :
A10 :
A10 :
A10 :
A10 :
A10 :
A10 :
A10 :
A10 :
1b-124 Troubleshooting Modules
010VF Supply
Meter Log Amplier
ALC Reference
Detector Log Amplier
Source Module Intfc
Unleveled Detectors
Modulator Drive Lo Bnd
Modulator Drive Hi Bnd
Loop Integrator
T.C. Ref Supply
Detector Oset DAC
Detector x10 Amplier
AM Logger Oset
Go to
Paragraph
A10.100
A10.200
A10.300
A10.400
A10.500
A10.600
A10.700
A10.700
A10.800
A10.9000
A10.9000
A10.9000
A10.9000
A10 ALC
A10.100
Continue
Go To A10.9000
A10.101
Go To A13.9000
A10 ALC
Continue
Troubleshooting Modules 1b-125
A10.102
There is an open on the motherboard between XA10J2-21
and XA13J2-21. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A10.103
Install a jumper. Then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-126 Troubleshooting Modules
A10 ALC
A10.200
Are there any cables connected to the rear/front panel
ALC input?
Go To A10.202
Continue
A10.201
Perform the following setup:
1. Remove all connections to the external ALC input.
2. Press 4PRESET5 4SERVICE5.
3. Select Selftest Menu .
4. Press 41245 4ENTER5.
5. Select Do Test #124 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A10 ALC
Go To ILT.000
Troubleshooting Modules 1b-127
A10.202
Press 4PRESET5 4CW5.
Continue
Go To A10.9000
A10.203
Perform the following setup:
1. Press 4PRESET5 4CW5 455 4GHz5.
2. Press 4POWER LEVEL5 4105 4dBm5.
Continue
1b-128 Troubleshooting Modules
Go To RF.3090
A10 ALC
A10.204
There is an RF output problem. This failure made the
A10 diagnostics fail. Before we can go further, this RF
problem must be isolated.
Go to ILT.2240.
A10 ALC
Troubleshooting Modules 1b-129
A10.300
Perform the following setup:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41285 4ENTER5.
4. Select Log (asterisk on).
5. Select Output Menu When to Log Always (asterisk
on).
6. Press 4PRIOR5.
7. Select Do Test #128 .
8. The voltage at XA10J2-4 should be 04.5 V61.5 V.
9. Select Cont .
10. The voltage at XA10J2-4 should be 00.0 V61.5 V.
11. Select Cont .
12. The voltage at XA10J2-4 should be 09.0 V61.5 V.
13. Select Cont .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNN
Continue
1b-130 Troubleshooting Modules
Go To A10.9000
A10 ALC
A10.301
Perform the following setup:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41285 4ENTER5.
4. Select Log (asterisk on).
5. Select Output Menu When to Log Always (asterisk
on).
6. Press 4PRIOR5.
7. Select Do Test #128 .
8. The voltage at XA14J2-1 should be 04.5 V61.5 V.
9. Select Cont .
10. The voltage at XA14J2-1 should be 00.0 V61.5 V.
11. Select Cont .
12. The voltage at XA14J2-1 should be 09.0 V61.5 V.
13. Select Cont .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNN
Go To A14.9000
A10 ALC
Continue
Troubleshooting Modules 1b-131
A10.302
There is an open on the motherboard between XA10J2-4
and XA14J2-1. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A10.303
Install a jumper. Then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-132 Troubleshooting Modules
A10 ALC
A10.400
Perform the following setup:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41265 4ENTER5.
4. Select Loop Do Test #126 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A10.410
A10 ALC
Continue
Troubleshooting Modules 1b-133
A10.401
Continue
Go To A15.9000
A10.402
There is an open on the motherboard between XA10J2-55
and XA15J2-27. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A10.403
Install a jumper. Then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-134 Troubleshooting Modules
A10 ALC
A10.410
For instrument models with A24 installed, remove ribbon
cable W39 (A20J4 to A24J1) from A20J4 and perform the
following setup. If A24 is not installed, continue with
A10.411.
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41265 4ENTER5.
4. Select Loop Do Test #126
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A10 ALC
Go To A24.9000
Troubleshooting Modules 1b-135
A10.411
Re-connect W39. Disconnect the wiring harness to A30
(W73) from A20. Perform the following setup:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41265 4ENTER5.
4. Select Loop Do Test #126 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A10.9000
Continue
A10.412
For all models except the HP/Agilent83623B/24B
and 83623L, replace the bridge detector A30. For
the 83623B/24B and 83623L, replace CR1. Go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
1b-136 Troubleshooting Modules
A10 ALC
A10.500
Are there any cables connected to the rear/front panel
SMI (source module interface) connectors?
Go To A10.9000
Continue
A10.501
Perform the following setup:
1. Remove all connections to the SMI inputs.
2. Press 4PRESET5 4SERVICE5.
3. Select Selftest Menu .
4. Press 41275 4ENTER5.
5. Select Do Test #127 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A10.9000
Continue
A10.502
The problem appears to be partially solved. Remove any
remaining connections and go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
A10 ALC
Troubleshooting Modules 1b-137
A10.600
Perform the following setup:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41315 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #131 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A10.9000
Continue
A10.601
Continue
1b-138 Troubleshooting Modules
Go To A15.9000
A10 ALC
A10.602
There is an open on the motherboard between XA10J2-3
and XA15J1-39, or there is an open between XA10J2-33
and XA15J1-78 (note that these lines are two separate
signals). Verify this with an ohmmeter.
Is jumpering the open an acceptable repair?
Go To A22.9000
Continue
A10.603
Install a jumper. Then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A10 ALC
Troubleshooting Modules 1b-139
A10.700
Perform the following setup:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41325 4ENTER5.
4. Note the pass/fail condition of test 132.
5. Press 41335 4ENTER5.
6. Note the pass/fail condition of test 133.
Did both test #132 and test #133 fail?
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A10.710
A10.701
Did only test #132 fail?
Continue
Go To A10.705
A10.702
The most likely cause of this failure is either W34 (A22J6
to A25J2) or A10. However, before replacing A10, check
all cables (especially W34) and wiring harnesses around
A10 and the RF deck. If you nd any problems, correct
them and then go to the Troubleshooting Foldout, block 1
(located just prior to the \Special Cases" tab).
If you do not nd any problems, replace A10 (go to
A10.9000) if it has not already been replaced. Otherwise,
go to RF.3890 and replace the A38 dual modulator. (If
you have Option 006, replace the A38 AM modulator.)
1b-140 Troubleshooting Modules
A10 ALC
A10.705
The most likely cause of this failure is either W35 (A22J5
to A24J7) or A10. However, before replacing A10, check
all cables (especially W35) and wiring harnesses around
A10 and the RF deck. Note that W35 does not slip on to
A24J7, it screws on. If you nd any problems, correct
them and then go to the Troubleshooting Foldout, block 1
(located just prior to the \Special Cases" tab).
If you do not nd any problems, replace A10 (go to
A10.9000) if it has not already been replaced. Otherwise,
replace the A24 (go to RF.2490).
A10.710
The problem is almost certainly A10. However, before
replacing A10, check all cabling and wiring harnesses
around A10 and the RF deck. If you nd any problems,
correct them and then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
If you do not nd any problems, replace A10 (go to
A10.9000) if it has not already be replaced. If A10 has
been replaced, go to A10.702, A10.705, and \Special
Cases" for additional information.
A10 ALC
Troubleshooting Modules 1b-141
A10.800
Are all cables removed from the synthesizer including
any connections to EXT ALC?
Continue
Go To A10.9000
A10.801
Remove all cables and go to ILT.105.
1b-142 Troubleshooting Modules
A10 ALC
A10.9000
A10 ALC
Replace the A10 assembly.
Troubleshooting Modules 1b-143
A11 FM Driver Troubleshooting
A11.000
1b-144 Troubleshooting Modules
Message Displayed on Synthesizer
Go to
Paragraph
A11 :
A11 :
A11 :
A11 :
A11 :
A11 :
A11 :
A11 :
A11.100
A11.200
A11.300
A11.400
A11.9000
A11.9000
A11.9000
A11.9000
ABUS Ground
AC Overmod Detector
-20V Supply
Range Attenuator
MM Band Attenuator
YTM Attenuator
Driver Amplier
DC Overmod Detector
A11 FM Driver
A11.100
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42325 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A11.110
A11 FM Driver
Continue
Troubleshooting Modules 1b-145
A11.101
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41425 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #142 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Verify a signal of 700 mV. However, expect some
portions of the signal to rise to levels of up to 15 Vdc.
This is not a failure as long as the signal is primarily
700 mV.
Go To A11.9000
1b-146 Troubleshooting Modules
Go To A11.120
A11 FM Driver
A11.110
Go To A15.9000
Continue
A11.111
There is an open on the motherboard between XA11J1-26
and XA15J1-43. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A11.112
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A11 FM Driver
Troubleshooting Modules 1b-147
A11.120
Verify a signal of 700 mV. However, expect some
portions of the signal to rise to levels of up to 15 Vdc.
This is not a failure as long as the signal is primarily
700 mV.
Continue
Go To A15.9000
A11.121
There is an open on the motherboard between XA11J1-51
and XA15J1-58. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A11.112
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-148 Troubleshooting Modules
A11 FM Driver
A11.200
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41485 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #148 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A11.9000
Continue
A11.201
Continue
A11 FM Driver
Go To A15.9000
Troubleshooting Modules 1b-149
A11.202
There is an open on the motherboard between XA11J1-50
and XA15J1-76. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A11.203
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-150 Troubleshooting Modules
A11 FM Driver
A11.300
Continue
Go To A11.9000
A11.301
Go To A16.9000
A11 FM Driver
Continue
Troubleshooting Modules 1b-151
A11.302
An open exists between XA11J2-44 and XA16J1-22.
Verify this with an ohmmeter. Is jumpering the open an
acceptable repair?
Go To A22.9000
Continue
A11.303
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-152 Troubleshooting Modules
A11 FM Driver
A11.400
Are all cables removed from the synthesizer including
connections to the FM input?
Continue
Go To A11.9000
A11.401
Remove all cables and go to ILT.105.
A11 FM Driver
Troubleshooting Modules 1b-153
A11.9000
1b-154 Troubleshooting Modules
Replace the A11 assembly.
A11 FM Driver
A12 Multiplier/Filter Driver Troubleshooting
A12.000
Message Displayed on Synthesizer
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 :
A12 Multiplier/Filter Driver
010 V Supply
YTM Kick Circuit
Rise-time Comp Circuit
Output Driver
YO Error Attenuator
YTF Output Driver
Delay Oset DAC
Delay Gain DAC
Droop Circuit
V/GHZ Buer
Rear Panel V/GHZ
Oset DAC
Slope DAC
VCOMP Summer
V/GHZ Attenuator
Track/Hold Circuit
YTM Tune in LO Band
YTF Kick
YTF Delay Oset DAC
YTF Delay Gain DAC
YTF Oset DAC
YTF Slope DAC
YTF VCOMP Summer
Go to
Paragraph
A12.100
A12.200
A12.300
A12.400
A12.500
A12.600
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
A12.9000
Troubleshooting Modules 1b-155
A12.100
Continue
Go To A12.9000
A12.101
Go To A13.9000
1b-156 Troubleshooting Modules
Continue
A12 Multiplier/Filter Driver
A12.110
There is an open on the motherboard between XA13J2-2
and XA12J2-21. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A12.111
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A12 Multiplier/Filter Driver
Troubleshooting Modules 1b-157
A12.200
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41595 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #159 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A12.9000
A12.201
Go To A14.9000
1b-158 Troubleshooting Modules
Continue
A12 Multiplier/Filter Driver
A12.210
There is an open on the motherboard between XA12J1-24
and XA14J1-27. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A12.211
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A12 Multiplier/Filter Driver
Troubleshooting Modules 1b-159
A12.300
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41605 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #160 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A12.9000
A12.301
Go To A14.9000
1b-160 Troubleshooting Modules
Continue
A12 Multiplier/Filter Driver
A12.310
There is an open on the motherboard between XA12J2-35
and XA14J2-42. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A12.311
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A12 Multiplier/Filter Driver
Troubleshooting Modules 1b-161
A12.400
Do the following:
1. Set power switch to STANDBY.
2. Disconnect the power cord.
3. Measure the resistance of the YTM tuning coil from
XA12J2-14 to XA12J2-60.
Continue
Go To A12.9000
A12.401
Was the resistance 35 ?
Go To A12.410
1b-162 Troubleshooting Modules
Continue
A12 Multiplier/Filter Driver
A12.402
Do the following:
1. Remove A12.
2. Measure the resistance of the SYTM tuning coil from
XA12J2-14 to XA12J2-60.
Continue
A12 Multiplier/Filter Driver
Go To A12.9000
Troubleshooting Modules 1b-163
A12.403
Do the following:
Disconnect W37 from A28J1 (ribbon cable connecting
RF interface to amp/multiplier).
Check for an open circuit between XA12J2-14 and
XA12J2-60 ( 100 k
).
Continue
1b-164 Troubleshooting Modules
Go To RF.2890
A12 Multiplier/Filter Driver
A12.404
Do the following:
Using the disassembly instructions in the manual,
remove the RF Deck.
Check for an open circuit between XA12J2-14 and
XA12J2-60 ( 100 k
).
Go To A22.9000
A12 Multiplier/Filter Driver
Go To A20.9000
Troubleshooting Modules 1b-165
A12.410
Go To A22.9000
Continue
A12.411
Do the following:
Using the disassembly instructions in the manual,
remove the RF deck.
Disconnect W37 from A28 (amp/multiplier).
Measure the resistance of the YTM coil at the
amp/multiplier. The resistance should be 35 and
65 between A28J7-4 and A28J7-12.
Go To RF.2890
Continue
A12.412
A high resistance exists on either W37 (the ribbon cable
that connects the RF deck to A28) or on A20 itself (the
RF interface assembly). Replace W37 or A20 and then go
to the Troubleshooting Foldout, block 1 (located just prior
to the \Special Cases" tab).
1b-166 Troubleshooting Modules
A12 Multiplier/Filter Driver
A12.500
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41705 4ENTER5.
4. Select Log Output Menu When to Log Always
(asterisk on).
5. Press 4PRIOR5.
6. Select Do Test #170 Cont Cont .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNN NNNNNNNNNNNNNN
Continue
A12 Multiplier/Filter Driver
Go To A12.9000
Troubleshooting Modules 1b-167
A12.501
Go To A5.9000
Continue
A12.502
There is an open on the motherboard between XA12J2-26
and XA5J2-26. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A12.503
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-168 Troubleshooting Modules
A12 Multiplier/Filter Driver
A12.600
Do the following:
1. Set power switch to standby.
2. Disconnect the power cord.
3. Measure the resistance of the YTF tuning coil from
XA12J2-44 to XA12J2-30.
Continue
Go To A12.9000
A12.601
Was the resistance 35 ?
Go To A12.610
A12 Multiplier/Filter Driver
Continue
Troubleshooting Modules 1b-169
A12.602
Do the following:
1. Remove A12.
2. Measure the resistance of the YTF tuning coil from
XA12J2-44 to XA12J2-30.
Continue
1b-170 Troubleshooting Modules
Go To A12.9000
A12 Multiplier/Filter Driver
A12.603
Do the following:
Disconnect W41 from A29J1 (ribbon cable connecting
RF interface to amp/lter).
Check for an open circuit between XA12J2-44 and
XA12J2-30 ( 100 k
).
Continue
A12 Multiplier/Filter Driver
Go To RF.2990
Troubleshooting Modules 1b-171
A12.604
Do the following:
Using the disassembly instructions in the manual,
remove the RF deck.
Check for an open circuit between XA12J2-44 and
XA12J2-30 ( 100 k
).
Go To A22.9000
Go To A20.9000
A12.610
Go To A22.9000
1b-172 Troubleshooting Modules
Continue
A12 Multiplier/Filter Driver
A12.611
Do the following:
Using the disassembly instructions in the manual,
remove the RF deck.
Disconnect W41 from A29 (amp/lter).
Measure the resistance of the YTF coil at the amp/lter.
The resistance should be 35 and 65 between
A29J7-4 and A29J7-12.
Go To RF.2990
Continue
A12.612
A high resistance exists on either W41 (the ribbon cable
that connects the RF interface to A29) or on A20 itself
(the RF interface assembly). Replace W41 or A20 and
then go to the Troubleshooting Foldout, block 1 (located
just prior to the \Special Cases" tab).
A12 Multiplier/Filter Driver
Troubleshooting Modules 1b-173
A12.9000
1b-174 Troubleshooting Modules
Replace the A12 assembly.
A12 Multiplier/Filter Driver
A13 YO Driver Troubleshooting
A13.000
A13 YO Driver
Message Displayed on Synthesizer
Go to
Paragraph
A13 :
A13 :
A13 :
A13 :
A13 :
A13 :
A13 :
A13 :
A13 :
A13 :
A13 :
A13 :
A13 :
A13.100
A13.200
A13.300
A13.400
A13.500
A13.600
A13.9000
A13.9000
A13.9000
A13.9000
A13.9000
A13.9000
A13.9000
+10V Reference
YO Kick Circuit
Width DAC [U3B]
Delay OFFSET DAC [U10A]
YO Loop Error
Driver Amplier
YO V/GHz Buer
CW DAC [U3B]
Sweep Attenuator
SWP Vern DAC [U16A]
OFF Vern DAC [U16B]
Delay GAIN DAC [U10B]
Narrow/Wide Switch
Troubleshooting Modules 1b-175
A13.100
Perform self-test #182:
1. Remove the A10, A12, and A14 assemblies.
2. Press 4PRESET5 4SERVICE5.
3. Select Selftest Menu .
4. Press 41825 4ENTER5.
5. Select Loop (asterisk on).
6. Select Do Test #182 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A13.120
A13.101
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42325 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
1b-176 Troubleshooting Modules
Go To A13.9000
A13 YO Driver
A13.102
Go To A15.9000
Continue
A13.103
There is an open on the motherboard between XA13J1-26
and XA15J1-44. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A13.104
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A13 YO Driver
Troubleshooting Modules 1b-177
A13.120
One of the following assemblies is defective:
A10 ALC.
A12 multiplier/lter Driver.
A14 sweep generator.
Replace any one of the assemblies and perform the
following test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41825 4ENTER5.
4. Select Do Test #182 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
If the test fails, the assembly just replaced is defective.
If the test does not fail, replace another assembly and
repeat test number 182. When the defective assembly is
identied, go to the 9000 paragraph for that assembly for
replacement instructions. For example, for A10 go to
A10.9000, for A12, go to A12.9000, and so on.
1b-178 Troubleshooting Modules
A13 YO Driver
A13.200
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41835 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #183 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A13.9000
A13.201
Go To A14.9000
A13 YO Driver
Continue
Troubleshooting Modules 1b-179
A13.202
There is an open on the motherboard between XA13J1-49
and XA14J1-67. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A13.203
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-180 Troubleshooting Modules
A13 YO Driver
A13.300
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41855 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #185 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
When comparing the oscilloscope waveform to the one
shown, the amplitude of the pulses is important; the
timing is not.
Continue
A13 YO Driver
Go To A13.9000
Troubleshooting Modules 1b-181
A13.301
When comparing the oscilloscope waveform to the one
shown, the amplitude of the pulses is important; the
timing is not.
Go To A14.9000
Continue
A13.302
There is an open on the motherboard between XA13J2-50
and XA14J2-57. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A13.303
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-182 Troubleshooting Modules
A13 YO Driver
A13.400
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42085 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #208 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A13.9000
A13.401
Go To A14.9000
A13 YO Driver
Continue
Troubleshooting Modules 1b-183
A13.402
There is an open on the motherboard between XA13J2-35
and XA14J2-42. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A13.403
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-184 Troubleshooting Modules
A13 YO Driver
A13.500
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 41945 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #194 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
When comparing the oscilloscope waveform to the one
shown, the amplitude of the pulses is important; the
timing is not.
Continue
A13 YO Driver
Go To A13.9000
Troubleshooting Modules 1b-185
A13.501
When comparing the oscilloscope waveform to the one
shown, the amplitude of the pulses is important; the
timing is not.
Go To A5.9000
Continue
A13.502
There is an open on the motherboard between XA13J2-26
and XA5J2-26. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A13.503
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-186 Troubleshooting Modules
A13 YO Driver
A13.600
Do the following:
1. Set the line power switch to standby.
2. Disconnect the power cord.
3. Measure the resistance of the YO tuning coil.
XA13J2-14 to XA13J2-60 should be 35 and 65 .
Continue
Go To A13.9000
A13.601
Was the resistance 35 ?
Go To A13.610
A13 YO Driver
Continue
Troubleshooting Modules 1b-187
A13.602
Do the following:
1. Remove A13.
2. Measure the resistance of the YO tuning coil
(XA13J2-14 to XA13J2-60).
Continue
1b-188 Troubleshooting Modules
Go To A13.9000
A13 YO Driver
A13.603
Do the following:
1. Disconnect W42 from A26J1 (ribbon cable connecting
RF interface to YO).
2. Check for an open circuit between XA13J2-14 and
XA13J2-60 ( 100 k
).
Continue
A13 YO Driver
Go To RF.2690
Troubleshooting Modules 1b-189
A13.604
Do the following:
1. Using the instructions in the \Disassembly and
Replacement Procedures" chapter of the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide, remove
the RF deck.
2. Check for an open circuit between XA13J2-14 and
XA13J2-60 ( 100 k
).
Go To A22.9000
Go To A20.9000
A13.610
1b-190 Troubleshooting Modules
A13 YO Driver
Go To A22.9000
Continue
A13.611
Perform the following:
1. Using the disassembly instructions in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide, remove
the RF deck.
2. Disconnect W42 from A26 (YO).
3. Measure the resistance of the YO coil at the YO. The
resistance should be 35 and 65 between
A26J1-4 and A26J1-12.
Go To RF.2690
Continue
A13.612
A high resistance exists on either W42 (ribbon cable that
connects the RF deck to A26) or on A20 itself. Replace
W42 or A20 and then go to the troubleshooting foldout,
block 1 (located just prior to the \Special Cases" tab).
A13 YO Driver
Troubleshooting Modules 1b-191
A13.9000
1b-192 Troubleshooting Modules
Replace the A13 assembly.
A13 YO Driver
A14 Sweep Generator Troubleshooting
A14.000
Message Displayed on Synthesizer
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 :
A14 Sweep Generator
010VREF Supply
1 MHz Clock
Sweep Status Line
Z-Axis Blanking
Rear Panel VSWP
Triple Timer U12
Triple Timer U13
Bucket Counter
Event Latch/Buer
Event RAM
Marker Control
Stop Sweep Control
Bucket Generator
ABUS Ground
Level Correction DAC
Sweep Time DAC
VSWP Output
Ramp Generator
Reset Loop
Go to
Paragraph
A14.100
A14.200
A14.300
A14.400
A14.500
A14.9000
A14.9000
A14.9000
A14.9000
A14.9000
A14.9000
A14.9000
A14.9000
A14.9000
A14.9000
A14.9000
A14.9000
A14.9000
A14.9000
Troubleshooting Modules 1b-193
A14.100
Continue
Go To A14.9000
A14.101
Go To A13.9000
1b-194 Troubleshooting Modules
Continue
A14 Sweep Generator
A14.110
There is an open on the motherboard between XA14J2-23
and XA13J2-21. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A14.111
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A14 Sweep Generator
Troubleshooting Modules 1b-195
A14.200
Continue
Go To A14.9000
A14.201
Continue
Go To A7.9000
A14.210
W18 is open or damaged. Replace W18 and then go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
1b-196 Troubleshooting Modules
A14 Sweep Generator
A14.300
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42095 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #209 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A14.9000
Continue
A14.301
Continue
A14 Sweep Generator
Go To A15.9000
Troubleshooting Modules 1b-197
A14.310
There is an open on the motherboard between XA14J1-35
and XA15J1-35. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A14.311
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-198 Troubleshooting Modules
A14 Sweep Generator
A14.400
Do the following:
1. Set the line power switch to standby.
2. Unplug the line power cord.
3. Measure the resistance between XA14J1-78 and
ground (10 k
).
Continue
A14 Sweep Generator
Go To A14.9000
Troubleshooting Modules 1b-199
A14.401
Do the following:
1. Ensure the instrument is still disconnected from line
power.
2. Remove A14.
3. Measure the resistance between XA14J1-78 and
ground (10 k
).
Continue
1b-200 Troubleshooting Modules
Go To A14.9000
A14 Sweep Generator
A14.402
Do the following:
1. Ensure the instrument is still disconnected from line
power.
2. Remove the rear panel.
3. Disconnect the ribbon cable connecting A19 to the
motherboard (W31).
4. Measure the resistance between XA14J1-78 and
ground (10 k
).
Go To A22.9000
A14 Sweep Generator
Go To A19.9000
Troubleshooting Modules 1b-201
A14.500
Are all cables removed from the synthesizer including the
VSWP connection?
Continue
Go To A14.9000
A14.501
Remove all cables and go to ILT.105.
1b-202 Troubleshooting Modules
A14 Sweep Generator
A14.9000
A14 Sweep Generator
Perform the \Sweep Ramp" adjustment. If this does not
cure the fault, replace the A14 assembly.
Troubleshooting Modules 1b-203
A15 CPU Troubleshooting
A15.000
1b-204 Troubleshooting Modules
Message Displayed on Synthesizer
Go to
Paragraph
A15 :
A15 :
A15 :
A15 :
A15 :
A15 :
A15 :
A15 :
A15 :
A15.100
A15.200
A15.300
A15.400
A15.500
A15.9000
A15.9000
A15.9000
A15.9000
I/O Address
I/O Strobe
I/O Data
ROM Tests
GPIB Interface Chips
ADC Circuitry
uProcessor Test
Peripheral/Timers
RAM Tests
A15 CPU
A15.100
Perform the following setup:
1. Set the line power switch to standby.
2. Completely remove the following assemblies:
A4 fractional-N.
A5 YO loop.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A10 ALC.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42315 4ENTER5.
7. Select Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A15 CPU
Go To A15.120
Troubleshooting Modules 1b-205
A15.101
Perform the following setup:
1. Set the line power switch to standby.
2. Replace all of the assemblies removed in the previous
step and reconnect all cables.
3. Carefully remove the A6 assembly. Be sure to
disconnect all exible and semi-rigid coax cables
before removing A6.
4. Set the line power switch to on.
5. Press 4PRESET5 4SERVICE5.
6. Select Selftest Menu .
7. Press 42315 4ENTER5.
8. Select Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
1b-206 Troubleshooting Modules
Go To A6.9000
A15 CPU
A15.102
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Replace the A6 assembly (removed in the previous
step) and reconnect all cables.
5. Using the disassembly instructions in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide, remove
the front panel and disconnect W2 (the ribbon cable
that connects the motherboard to A2).
6. Temporarily replace the front panel leaving W2 loose.
7. Reconnect line power (the power-on control is on A2
so the synthesizer will power up automatically, even
in standby).
8. Press 4PRESET5 4SERVICE5.
9. Select Selftest Menu .
10. Press 42315 4ENTER5.
11. Select Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A15 CPU
Go To A2.9000
Troubleshooting Modules 1b-207
A15.103
Perform the following setup:
1. Disconnect the line power cord.
2. Wait for all the indicators in the power supply section
to go out.
3. Remove the front panel.
4. Reconnect W2 to A2.
5. Disconnect W3 (the ribbon cable that connects A3 to
the motherboard).
6. Temporarily replace the front panel leaving the ribbon
cable loose.
7. Reconnect the line power cord.
8. Set the line power switch to on.
9. Observe the red indicators on A15.
Are all A15 indicators o?
Continue
WARNING
1b-208 Troubleshooting Modules
Go To A3.9000
When the instrument is connected to AC line power
or the A18 high voltage neon indicator is on, there
are voltages present that can cause personal injury
or death. Only trained, qualied personnel, who
are aware of the hazards involved, should perform
service on this instrument with its protective covers
removed.
A15 CPU
A15.104
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove the front panel and reconnect W3 (the
ribbon cable that connects A3 to the motherboard).
5. Reinstall the front panel.
6. Remove the rear panel and disconnect W31 (the
ribbon cable that connects the motherboard to A19).
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide as
needed.
7. Temporarily replace the rear panel leaving the ribbon
cable (W31) loose. Take great care to ensure that the
ribbon cable is not in contact with any line power
wires or connections.
8. Reconnect the line power cord.
9. Set the line power switch to on.
10. Press 4PRESET5 4SERVICE5.
11. Select Selftest Menu .
12. Press 42315 4ENTER5.
13. Select Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A15 CPU
Go To A19.9000
Troubleshooting Modules 1b-209
A15.105
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect W31 (the ribbon cable that connects A19
to the motherboard).
5. Remove the RF deck. Refer to the disassembly
procedures in the Agilent Technologies 8360 B-Series
Swept Signal Generator/L-Series Swept CW Generator
Service Guide as needed.
6. Reconnect the line power cord.
7. Set the line power switch to on.
8. Press 4PRESET5 4SERVICE5. Ignore all unleveled
indications.
9. Select Selftest Menu .
10. Press 42315 4ENTER5.
11. Select Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A15.8500
1b-210 Troubleshooting Modules
Go To A20.9000
A15 CPU
A15.120
One of the following assemblies is defective:
A4 fractional-n.
A5 YO loop.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A10 ALC.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
Replace any one of the assemblies and perform the
following test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42315 4ENTER5.
4. Select Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
If the test fails, the assembly just replaced is defective.
If the test does not fail, replace another assembly and
repeat test number 231. When the defective assembly is
identied, go to the 9000 paragraph for that assembly
for replacement instructions. For example, for A4, go to
A4.9000, for A5, go to A5.9000, and so on.
A15 CPU
Troubleshooting Modules 1b-211
A15.200
Perform the following setup:
1. Set the line power switch to on.
2. Press 4PRESET5 4SERVICE5.
3. Select Selftest Menu .
4. Press 42325 4ENTER5.
5. Select Log Output Menu When to Log Always
(asterisk on).
6. Press 4PRIOR5.
7. Select Do Test #232 .
8. Select Continue . Note the fail or pass status of each
strobe.
9. Use the following table to determine your next step.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNN
Strobes
Only strobe #0 fails
Only strobe #1 fails
Only strobe #2 fails
Only strobe #3 fails
Only strobe #4 fails
Only strobe #5 fails
Only strobe #6 fails
Only strobe #7 fails
All other strobe failures
WARNING
1b-212 Troubleshooting Modules
Go To
Paragraph
A15.210
A15.220
A15.230
A15.240
A15.250
A15.260
A15.270
A15.280
A15.8500
When the instrument is connected to AC line power
or the A18 high voltage neon indicator is on, there
are voltages present that can cause personal injury
or death. Only trained, qualied personnel, who
are aware of the hazards involved, should perform
service on this instrument with its protective covers
removed.
A15 CPU
A15.210
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove the rear panel and disconnect W31 (the
ribbon cable that connects the motherboard to A19).
(Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide as
needed.)
5. Temporarily replace the rear panel, leaving the
ribbon cable loose. Take great care to ensure that the
ribbon cable is not in contact with any line power
wires or connections.
6. Reconnect the line power cord.
7. Set the line power switch to on.
8. Press 4PRESET5 4SERVICE5.
9. Select Selftest Menu .
10. Press 42315 4ENTER5.
11. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A19.9000
A15.211
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect W31 (the ribbon cable that connects A19 to
the motherboard).
Go to A15.8500.
A15 CPU
Troubleshooting Modules 1b-213
A15.220
Perform the following:
1. Set the line power switch to standby.
2. Remove the A14 assembly.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42325 4ENTER5.
7. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A14.9000
A15.221
Perform the following:
1. Set the line power switch to standby.
2. Replace the A14 assembly.
Go to A15.8500.
1b-214 Troubleshooting Modules
A15 CPU
A15.230
Perform the following:
1. Set the line power switch to standby.
2. Remove the A11 and A12 assemblies.
3. Set line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42325 4ENTER5.
7. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A15.235
A15.231
Perform the following:
1. Set the line power switch to standby.
2. Replace the A11 and A12 assemblies.
Go to A15.8500.
A15 CPU
Troubleshooting Modules 1b-215
A15.235
Perform the following:
1. Set the line power switch to standby.
2. Replace the A11 assembly.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42325 4ENTER5.
7. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A11.9000
1b-216 Troubleshooting Modules
Go To A12.9000
A15 CPU
A15.240
Perform the following:
1. Set the line power switch to standby.
2. Remove the A9 and A10 assemblies.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42325 4ENTER5.
7. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A15.245
A15.241
Perform the following:
1. Set the line power switch to standby.
2. Replace the A9 and A10 assemblies.
Go to A15.8500.
A15 CPU
Troubleshooting Modules 1b-217
A15.245
Perform the following:
1. Set the line power switch to standby.
2. Replace the A9 assembly.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42325 4ENTER5.
7. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A9.9000
Go To A10.9000
A15.250
Perform the following:
1. Set the line power switch to standby.
2. Remove the A7 assembly (and the A8 assembly { Opt.
002).
3. Carefully remove the A6 assembly. Be sure to
disconnect all cables.
4. Set the line power switch to on.
5. Press 4PRESET5 4SERVICE5.
6. Select Selftest Menu .
7. Press 42325 4ENTER5.
8. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
1b-218 Troubleshooting Modules
Go To A15.255
A15 CPU
A15.251
Perform the following:
1. Set the line power switch to standby.
2. Replace the A6 and A7 assemblies (and the A8
assembly { Opt. 002).
Go To A15.8500.
A15.255
Perform the following for Option 002.
1. Set the line power switch to standby.
2. Replace the A8 assembly.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42325 4ENTER5.
7. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A8.9000
A15 CPU
Continue
Troubleshooting Modules 1b-219
A15.256
Perform the following:
1. Set the line power switch to standby.
2. Replace the A7 assembly.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42325 4ENTER5.
7. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A7.9000
Go To A6.9000
A15.260
Perform the following:
1. Set the line power switch to standby.
2. Remove the A4 and A5 assemblies.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42325 4ENTER5.
7. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
1b-220 Troubleshooting Modules
Go To A15.265
A15 CPU
A15.261
Perform the following:
1. Set the line power switch to standby.
2. Replace the A4 and A5 assemblies.
Go To A15.8500.
A15.265
Perform the following:
1. Set the line power switch to standby.
2. Replace the A4 assembly.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42325 4ENTER5.
7. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A4.9000
A15 CPU
Go To A5.9000
Troubleshooting Modules 1b-221
A15.270
Perform the following:
1. Set the line power switch to standby.
2. Using the disassembly instructions in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide, carefully
remove the RF deck.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42325 4ENTER5.
7. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A20.9000
A15.271
Perform the following:
1. Set the line power switch to standby.
2. Replace the A20 assembly.
Go To A15.8500.
1b-222 Troubleshooting Modules
A15 CPU
A15.280
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove the front panel and disconnect W2 and W3
(the ribbon cables connecting A2 and A3 to the
motherboard). Refer to the disassembly procedures in
the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service Guide
as needed.
5. Temporarily replace the front panel leaving the ribbon
cables loose.
6. Reconnect line power (the power-on control is on A2
so the synthesizer will power up automatically, even in
standby).
7. Observe the red indicators on A15.
Are all A15 indicators o?
Continue
Go To A15.285
A15.281
Perform the following:
1. Set the line power switch to standby.
2. Reconnect the ribbon cables for A2 and A3.
Go To A15.8500.
A15 CPU
Troubleshooting Modules 1b-223
A15.285
Perform the following:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect W3, the ribbon cable that connects the
motherboard to A3.
5. Temporarily replace the front panel.
6. Reconnect the line power cord.
7. Press 4PRESET5 4SERVICE5.
8. Select Selftest Menu .
9. Press 42325 4ENTER5.
10. Select Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A3.9000
1b-224 Troubleshooting Modules
Go To A2.9000
A15 CPU
A15.300
Perform the following setup:
1. Set the line power switch to standby.
2. Remove the following assemblies:
A4 fractional-n.
A5 YO loop.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A10 ALC.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Selftest Menu .
6. Press 42335 4ENTER5.
7. Select Do Test #233 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A15 CPU
Go To A15.320
Troubleshooting Modules 1b-225
A15.301
Perform the following:
1. Set the line power switch to standby.
2. Replace all of the assemblies removed in the previous
step.
3. Carefully remove the A6 assembly. Be sure to
disconnect all exible and semi-rigid coax cables
before removing A6.
4. Set the line power switch to on.
5. Press 4PRESET5 4SERVICE5.
6. Select Selftest Menu .
7. Press 42335 4ENTER5.
8. Select Do Test #233 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
1b-226 Troubleshooting Modules
Go To A6.9000
A15 CPU
A15.302
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Replace the A6 assembly removed in the previous
step.
5. Remove the front panel and disconnect W2 (the
ribbon cable that connects the motherboard to A2).
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide as
needed.
6. Temporarily replace the front panel leaving W2 loose.
7. Reconnect line power (the power-on control is on A2
so the synthesizer will power up automatically, even
in standby).
8. Press 4PRESET5 4SERVICE5.
9. Select Selftest Menu .
10. Press 42335 4ENTER5.
11. Select Do Test #233 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A15 CPU
Go To A2.9000
Troubleshooting Modules 1b-227
A15.303
Perform the following setup:
1. Disconnect the line power cord.
2. Wait for all the indicators in the power supply section
to go out.
3. Remove the front panel.
4. Reconnect W2 to A2. Disconnect W3 (the ribbon cable
that connects A3 to the motherboard).
5. Temporarily replace the front panel, leaving W3 loose.
6. Reconnect line power.
7. Set the line power switch to on.
8. Observe the red indicators on A15.
Are all A15 indicators o?
Continue
WARNING
1b-228 Troubleshooting Modules
Go To A3.9000
When the instrument is connected to AC line power
or the A18 high voltage neon indicator is on, there
are voltages present that can cause personal injury
or death. Only trained, qualied personnel, who
are aware of the hazards involved, should perform
service on this instrument with its protective covers
removed.
A15 CPU
A15.304
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove the front panel and reconnect W3 (the
ribbon cable that connects A3 to the motherboard).
5. Replace the front panel.
6. Remove the rear panel and disconnect W31 (the
ribbon cable that connects the motherboard to A19).
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide as
needed.
7. Temporarily replace the rear panel leaving W31 loose.
Take great care to ensure the ribbon cable is not in
contact with any line power wires or connections.
8. Reconnect line power.
9. Set the line power switch to on.
10. Press 4PRESET5 4SERVICE5.
11. Select Selftest Menu .
12. Press 42335 4ENTER5.
13. Select Do Test #233 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A15 CPU
Go To A19.9000
Troubleshooting Modules 1b-229
A15.305
Perform the following:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect the A19 assembly removed in the previous
step.
5. Remove the RF deck. Refer to the disassembly
procedures in the Agilent Technologies 8360 B-Series
Swept Signal Generator/L-Series Swept CW Generator
Service Guide as needed.
6. Reconnect line power.
7. Set the line power switch to on.
8. Press 4PRESET5 4SERVICE5.
9. Select Selftest Menu .
10. Press 42335 4ENTER5.
11. Select Do Test #233 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A15.8500
1b-230 Troubleshooting Modules
Go To A20.9000
A15 CPU
A15.320
One of the following assemblies is defective:
A4 fractional-N.
A5 YO loop.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A10 ALC.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
Replace any one of the assemblies and perform the
following test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42335 4ENTER5.
4. Select Do Test #233 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
If the test fails, the assembly just replaced is defective.
If the test does not fail, replace another assembly and
repeat test number 233. When the defective assembly is
identied, go to the 9000 paragraph for that assembly
for replacement instructions. For example, for A4, go to
A4.9000, for A5, go to A5.9000, and so on.
A15 CPU
Troubleshooting Modules 1b-231
A15.400
Perform the following:
1. Set the line power switch to on.
2. Press 4PRESET5 4SERVICE5.
3. Select Selftest Menu .
4. Press 42345 4ENTER5.
5. Select Log Output Menu When to Log Always
(asterisk on).
6. Press 4PRIOR5.
7. Select Do Test #234
8. Select Continue . Note the fail or pass status of the
EEROM tests (ignore all other pass/fails).
Did all EEROM tests pass?
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
Go To A15.8500
A15.401
Perform the following:
1. Set the line power switch to on.
2. Press 4PRESET5 4SERVICE5.
3. Select Selftest Menu .
4. Press 42355 4ENTER5.
5. Select Do Test #235 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Did all RAM tests pass?
Go To A15.9020
1b-232 Troubleshooting Modules
Continue
A15 CPU
A15.405
Perform the following:
Note
Take great care during these procedures not to short out
the one farad capacitor used as the back-up power supply
for the RAM.
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Very carefully remove the A15 assembly and place it
on an ESD mat.
4. Using plastic tools and taking great care not to
short out the battery backed-up RAM, remove and
replace the EEROMs (U14 and U62) on A15 with new
EEROMs.
5. Reinstall A15.
6. Reconnect line power.
7. Set the line power switch to on.
8. Press 4PRESET5 4SERVICE5.
9. Select Adjust Menu Calib Menu Cal Util Menu .
10. Select Save Cal yes .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNN
Were you able to save calibration constants from RAM to
EEROM successfully?
Go To A15.9020
A15 CPU
Continue
Troubleshooting Modules 1b-233
A15.406
Perform the following:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest (Full) .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Do all tests pass?
Continue
Go To A15.410
A15.407
The synthesizer indicates one or more self-test failures.
Go to the paragraph shown on the synthesizer for the
failure unless the message is A15 : ROM tests. In that
case, rather than the paragraph shown on the synthesizer,
go to A15.9020.
A15.410
When EEROM was lost, most of the calibration data was
saved by copying from backed-up RAM. However, two
types of data were not saved. These data were test
patches for the diagnostics and attenuator correction
data. Both sets of data will have to be recreated.
To recreate the attenuator correction data, refer to the
performance tests and adjustments. For the test patches
on the diagnostics, refer to the appropriate service or
installation notes.
1b-234 Troubleshooting Modules
A15 CPU
A15.500
When the GPIB diagnostic was performed, was the
synthesizer disconnected from all GPIB busses?
Continue
Go To A15.8500
A15.501
Remove all GPIB connections and restart the
troubleshooting process.
A15 CPU
Troubleshooting Modules 1b-235
A15.1100
Perform the following setup:
1. Set the line power switch to standby.
2. Completely remove the following assemblies:
A4 fractional-N.
A5 YO loop.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A10 ALC.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
3. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
1b-236 Troubleshooting Modules
Go To A15.1120
A15 CPU
A15.1101
Perform the following setup:
1. Set the line power switch to standby.
2. Replace all of the assemblies removed in the previous
step and reconnect all cables.
3. Carefully remove the A6 assembly. Be sure to
disconnect all exible and semi-rigid coax cables
before removing A6.
4. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
A15 CPU
Go To A6.9000
Troubleshooting Modules 1b-237
A15.1102
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Replace the A6 assembly (removed in the previous
step) and reconnect all cables.
5. Using the disassembly instructions in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide, remove
the front panel and disconnect W2 (the ribbon cable
that connects the motherboard to A2).
6. Temporarily replace the front panel leaving W2 loose.
7. Reconnect line power (the power-on control is on A2
so the synthesizer will power up automatically, even in
standby) and observe the indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
1b-238 Troubleshooting Modules
Go To A2.9000
A15 CPU
A15.1103
Perform the following setup:
1. Disconnect the line power cord.
2. Wait for all the indicators in the power supply section
to go out.
3. Remove the front panel.
4. Reconnect W2 to A2.
5. Disconnect W3 (the ribbon cable that connects A3 to
the motherboard).
6. Temporarily replace the front panel leaving the ribbon
cable loose.
7. Reconnect the line power cord.
8. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
WARNING
A15 CPU
Go To A3.9000
When the instrument is connected to AC line power
or the A18 high voltage neon indicator is on, there
are voltages present that can cause personal injury
or death. Only trained, qualied personnel, who
are aware of the hazards involved, should perform
service on this instrument with its protective covers
removed.
Troubleshooting Modules 1b-239
A15.1104
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove the front panel and reconnect W3 (the ribbon
cable that connects A3 to the motherboard).
5. Replace the front panel.
6. Remove the rear panel and disconnect W31 (the ribbon
cable that connects the motherboard to A19). Refer to
the disassembly procedures in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept
CW Generator Service Guide as needed.
7. Temporarily replace the rear panel leaving the ribbon
cable loose. Take great care to ensure the ribbon
cable is not in contact with any line power wires or
connections.
8. Reconnect the line power cord.
9. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
1b-240 Troubleshooting Modules
Go To A19.9000
A15 CPU
A15.1105
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect W31 (the ribbon cable that connects A19 to
the motherboard).
5. Remove the RF deck. Refer to the disassembly
procedures in the Agilent Technologies 8360 B-Series
Swept Signal Generator/L-Series Swept CW Generator
Service Guide as needed.
6. Reconnect the line power cord.
7. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Go To A15.8500
A15 CPU
Go To A20.9000
Troubleshooting Modules 1b-241
A15.1120
One of the following assemblies is defective:
A4 fractional-N.
A5 YO loop.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A10 ALC.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
1. Set the line power switch to standby.
2. Replace an assembly.
3. Set the line power switch to on.
4. Check the display's operation. If the display or the
indicators on A15 begin to operate incorrectly, the
assembly just replaced is defective. If the display does
not fail, replace another assembly and repeat the
process. When the defective assembly is identied,
go to the 9000 paragraph for that assembly for
replacement instructions. For example, for A4, go to
A4.9000, for A5, go to A5.9000, and so on.
1b-242 Troubleshooting Modules
A15 CPU
A15.1200
Perform the following setup:
1. Set the line power switch to on and observe the 12
LEDs on the top edge of A15.
2. When the 4 left-most LEDs (DS1) display 0010, observe
and record the state of the right 8 LEDs (DS2 and
DS3).
3. Find the state of the right 8 LEDs in the following
table and go to the indicated paragraph.
LEDs
X1XX XXXX
1XXX XXXX
11XX XXXX
All Else
Go To
Paragraph
A15.1201
A15.1201
A15.1201
A15.8500
X = don't care
A15 CPU
Troubleshooting Modules 1b-243
A15.1201
An EEROM failure has occurred. There is some chance
that the EEROM data can be partially recovered
from RAM. This test determines if any data might be
recovered.
1. Set the line power switch to standby and then set it to
on and observe the 12 LEDs on the top edge of A15.
2. When the 4 left-most LEDs (DS1) display 0010, observe
and record the state of the right 8 LEDs (DS2 and
DS3).
3. Find the state of the right 8 LEDs in the following
table and go to the indicated paragraph.
LEDs
X1XX XXXX
1XXX XXXX
11XX XXXX
All Else
Go To
Paragraph
A15.1201
A15.1201
A15.1201
A15.8500
X = don't care
1b-244 Troubleshooting Modules
A15 CPU
A15.1205
Perform the following:
Note
Take great care during these procedures not to short out
the one farad capacitor used as the back-up power supply
for the RAM.
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Very carefully remove the A15 assembly and place it
on an ESD mat.
4. Using plastic tools and taking great care not to short
out the backed-up RAM, remove the EEROMs (U14
and U62) on A15 and install new EEROMs.
5. Reinstall A15.
6. Reconnect line power.
7. Set the line power switch to on.
8. Press 4PRESET5 4SERVICE5.
9. Select Adjust Menu Calib Menu Cal Util Menu .
10. Select Save Cal yes .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNN
Were you able to save calibration constants from RAM to
EEROM successfully?
Go To A15.9020
A15 CPU
Continue
Troubleshooting Modules 1b-245
A15.1206
Perform the following:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest (Full) .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Do all tests pass?
Continue
Go To A15.1210
A15.1207
The synthesizer indicates one or more self-test failures.
Go to the paragraph shown on the synthesizer for the
failure unless the message is A15 : ROM tests. In that
case, rather than the paragraph shown on the synthesizer,
go to A15.9020.
A15.1210
When EEROM was lost, most of the calibration data was
saved by copying from backed-up RAM. However, two
types of data were not saved. These data were test
patches for the diagnostics and attenuator correction
data. Both sets of data will have to be recreated.
To recreate the attenuator correction data, refer to the
performance tests and adjustments. For the test patches
on the diagnostics, refer to the appropriate service or
installation notes.
1b-246 Troubleshooting Modules
A15 CPU
A15.1300
WARNING
A15 CPU
Perform the following setup:
1. Set the line power switch to on and observe the 12
LEDs on the top edge of A15.
2. When the 4 left-most LEDs (DS1) display 0011, observe
and record the state of the right 8 LEDs (DS2 and
DS3).
3. Find the state of the right 8 LEDs in the following
table and go to the indicated paragraph.
LEDs
Go To
Paragraph
0000 0001
0000 0010
0000 0100
0000 1000
0001 0000
0010 0000
0100 0000
1000 0000
All Else
A15.1310
A15.1320
A15.1330
A15.1340
A15.1350
A15.1360
A15.1370
A15.1380
A15.8500
When the instrument is connected to AC line power
or the A18 high voltage neon indicator is on, there
are voltages present that can cause personal injury
or death. Only trained, qualied personnel, who
are aware of the hazards involved, should perform
service on this instrument with its protective covers
removed.
Troubleshooting Modules 1b-247
A15.1310
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove the rear panel and disconnect W31 (the ribbon
cable that connects the motherboard to A19). Refer to
the disassembly procedures in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept
CW Generator Service Guide as needed.
5. Temporarily replace the rear panel leaving the ribbon
cable loose. Take great care to ensure the ribbon
cable is not in contact with any line power wires or
connections.
6. Reconnect the line power cord.
7. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
Go To A19.9000
A15.1311
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect W31 (the ribbon cable that connects A19 to
the motherboard).
Go to A15.8500.
1b-248 Troubleshooting Modules
A15 CPU
A15.1320
Perform the following setup:
1. Set the line power switch to standby.
2. Remove the A14 assembly.
3. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
Go To A14.9000
A15.1321
Perform the following:
1. Set the line power switch to standby.
2. Replace the A14 assembly.
Go to A15.8500.
A15.1330
Perform the following setup:
1. Set the line power switch to standby.
2. Remove the A11 and A12 assemblies.
3. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
A15 CPU
Go To A15.1335
Troubleshooting Modules 1b-249
A15.1331
Perform the following:
1. Set the line power switch to standby.
2. Replace the A11 and A12 assemblies.
Go to A15.8500.
A15.1335
Perform the following setup:
1. Set the line power switch to standby.
2. Replace the A11 assembly.
3. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Go To A11.9000
Go To A12.9000
A15.1340
Perform the following setup:
1. Set the line power switch to standby.
2. Remove the A9 and A10 assemblies.
3. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
1b-250 Troubleshooting Modules
Go To A15.1345
A15 CPU
A15.1341
Perform the following:
1. Set the line power switch to standby.
2. Replace the A9 and A10 assemblies.
Go to A15.8500.
A15.1345
Perform the following setup:
1. Set the line power switch to standby.
2. Replace the A9 assembly.
3. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Go To A9.9000
Go To A10.9000
A15.1350
Perform the following setup:
1. Set the line power switch to standby.
2. Remove the A7 assembly.
3. Carefully remove the A6 assembly. Be sure to
disconnect all cables.
4. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
A15 CPU
Go To A15.1355
Troubleshooting Modules 1b-251
A15.1351
Perform the following:
1. Set the line power switch to standby.
2. Replace the A6 and A7 assemblies.
Go To A15.8500.
A15.1355
Perform the following setup:
1. Set the line power switch to standby.
2. Replace the A7 assembly.
3. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Go To A7.9000
Go To A6.9000
A15.1360
Perform the following setup:
1. Set the line power switch to standby.
2. Remove the A4 and A5 assemblies.
3. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
1b-252 Troubleshooting Modules
Go To A15.1365
A15 CPU
A15.1361
Perform the following:
1. Set the line power switch to standby.
2. Replace the A4 and A5 assemblies.
Go To A15.8500
A15.1365
Perform the following setup:
1. Set the line power switch to standby.
2. Replace the A4 assembly.
3. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Go To A4.9000
Go To A5.9000
A15.1370
Perform the following setup:
1. Set the line power switch to standby.
2. Using the disassembly instructions in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide, carefully
remove the RF deck (A20).
3. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
A15 CPU
Go To A20.9000
Troubleshooting Modules 1b-253
A15.1371
Perform the following:
1. Set the line power switch to standby.
2. Replace the A20 assembly.
Go To A15.8500.
A15.1380
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove the front panel and disconnect W2 and W3
(the ribbon cables connecting A2 and A3 to the
motherboard). Refer to the disassembly procedures in
the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service Guide
as needed.
5. Temporarily replace the front panel leaving the ribbon
cables loose.
6. Reconnect line power (the power-on control is on A2
so the synthesizer will power up automatically, even in
standby) and observe the indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
Go To A15.1385
A15.1381
Perform the following:
1. Set the line power switch to standby.
2. Reconnect the ribbon cables for A2 and A3.
Go To A15.8500.
1b-254 Troubleshooting Modules
A15 CPU
A15.1385
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect W3, the ribbon cable that connects the
motherboard to A3.
5. Temporarily replace the front panel.
6. Reconnect the line power cord.
7. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Go To A3.9000
A15 CPU
Go To A2.9000
Troubleshooting Modules 1b-255
A15.1400
Perform the following setup:
1. Set the line power switch to standby.
2. Completely remove the following assemblies:
A4 fractional-N.
A5 YO loop.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A10 ALC.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
3. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
1b-256 Troubleshooting Modules
Go To A15.1420
A15 CPU
A15.1401
Perform the following setup:
1. Set the line power switch to standby.
2. Replace all of the assemblies removed in the previous
step and reconnect all cables.
3. Carefully remove the A6 assembly. Be sure to
disconnect all exible and semi-rigid coax cables
before removing A6.
4. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
A15 CPU
Go To A6.9000
Troubleshooting Modules 1b-257
A15.1402
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Replace the A6 assembly (removed in the previous
step) and reconnect all cables.
5. Using the disassembly instructions in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide, remove
the front panel and disconnect W2 (the ribbon cable
that connects the motherboard to A2).
6. Temporarily replace the front panel leaving the ribbon
cable loose.
7. Reconnect line power (the power-on control is on A2
so the synthesizer will power up automatically, even in
standby) and observe the indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
1b-258 Troubleshooting Modules
Go To A2.9000
A15 CPU
A15.1403
Perform the following setup:
1. Disconnect the line power cord.
2. Wait for all the indicators in the power supply section
to go out.
3. Remove the front panel.
4. Reconnect W2 to A2.
5. Disconnect W3 (the ribbon cable that connects A3 to
the motherboard).
6. Temporarily replace the front panel leaving the ribbon
cable loose.
7. Reconnect the line power cord.
8. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
WARNING
A15 CPU
Go To A3.9000
When the instrument is connected to AC line power
or the A18 high voltage neon indicator is on, there
are voltages present that can cause personal injury
or death. Only trained, qualied personnel, who
are aware of the hazards involved, should perform
service on this instrument with its protective covers
removed.
Troubleshooting Modules 1b-259
A15.1404
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove the front panel and reconnect W3 (the ribbon
cable that connects A3 to the motherboard).
5. Replace the front panel.
6. Remove the rear panel and disconnect W31 (the ribbon
cable that connects the motherboard to A19). Refer to
the disassembly procedures in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept
CW Generator Service Guide as needed.
7. Temporarily replace the rear panel leaving the ribbon
cable loose. Take great care to ensure the ribbon
cable is not in contact with any line power wires or
connections.
8. Reconnect the line power cord.
9. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Continue
1b-260 Troubleshooting Modules
Go To A19.9000
A15 CPU
A15.1405
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect W31 (the ribbon cable that connects A19 to
the motherboard).
5. Remove the RF deck. Refer to the disassembly
procedures in the Agilent Technologies 8360 B-Series
Swept Signal Generator/L-Series Swept CW Generator
Service Guide as needed.
6. Reconnect the line power cord.
7. Repeat the power-on sequence and observe the
indicators on A15.
Did all the indicators turn on temporarily and then turn
o?
Go To A15.8500
A15 CPU
Go To A20.9000
Troubleshooting Modules 1b-261
A15.1420
One of the following assemblies is defective:
A4 fractional-N.
A5 YO loop.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A10 ALC.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
Replace the assemblies one at a time. Then check the
display's operation. If the display begins to operate
incorrectly, the assembly just replaced is defective. If the
test does not fail, replace another assembly and repeat
the process. When the defective assembly is identied, go
to the 9000 paragraph for that assembly for replacement
instructions. For example, for A4, go to A4.9000, for A5,
go to A5.9000, and so on.
1b-262 Troubleshooting Modules
A15 CPU
A15.8500
Perform the following:
1. Set the line power switch to standby.
2. Replace any remaining assemblies that had been
removed.
3. Remove and replace A15 (this resets the edge
connector).
4. Set the line power switch to on.
5. Press 4PRESET5 4SERVICE5.
6. Select Selftest Menu .
7. Press 42285 4ENTER5.
8. Select Do Test #228 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A15.9000
Continue
A15.8501
Removing and replacing A15 has apparently xed the
problem. Most likely, it was an intermittent problem
associated with the edge connector or IC sockets on A15.
Record this situation for future reference. If the problem
recurs, or if this is a recurrence, then replace A15 (go to
A15.9000). Otherwise you are done.
A15 CPU
Troubleshooting Modules 1b-263
A15.9000
Perform the following:
1. Set the line power switch to standby.
2. Remove the A15 assembly.
3. Install a new A15 assembly.
4. Set the line power switch to on.
5. Press 4PRESET5 4SERVICE5.
6. Select Selftest Menu .
7. Press 42285 4ENTER5.
8. Select Do Test #228 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A15.9005
Continue
A15.9001
The calibration data stored in RAM and EEROM on
the failed A15 assembly appears intact. The following
procedure retains the calibration data by transferring
the EEROMs to the new A15 assembly. However, the
replacement of the EEROMs on A15 is somewhat
complex. Do not rush through this procedure. A single
error could cause you to lose all the calibration data. This
data requires several days to recreate. Carefully follow
these steps:
1. Set the line power switch to standby.
2. Remove the line power cord.
3. Very carefully remove the defective A15 assembly
and place it on an ESD mat.
4. Using appropriate tools, and taking great care not
to damage the EEROMs (U14 and U62), remove
the EEROMs from the defective A15 assembly and
install the EEROMs on the new A15 assembly. If
the defective A15 assembly had only one EEROM
(U14) and the new A15 assembly has two EEROMs
(U14 and U62), install U14 in the U14 socket on the
replacement A15 assembly.
1b-264 Troubleshooting Modules
A15 CPU
5.
6.
7.
8.
9.
Install the new A15 assembly in the instrument.
Reconnect line power.
Set the line power switch to on.
Press 4PRESET5 4SERVICE5.
Select Adjust Menu Calib Menu Cal Util Menu
Recall Cal yes .
10. Select Selftest Menu .
11. Press 42285 4ENTER5.
12. Select Do Test #228 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A15.9020
Continue
A15.9002
To retain traceability, perform the ADC Adjustment
using the automated tests software supplied with
the synthesizer. An HP 9000 series 200/300 desktop
computer and HP BASIC are required in addition to the
software. Follow the procedure given in \Automated
Tests" in the Agilent Technologies 8360 B-Series Swept
Signal Generator/L-Series Swept CW Generator Service
Guide. After completing the adjustment, go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A15.9005
This new A15 assembly is defective also. Remove this
A15 assembly and reinstall the original (defective) A15
assembly. You must have the original A15 assembly
because it contains all the calibration data for the
instrument.
Go to A15.9000 and replace A15 again. If the new A15
is not defective, you will be instructed to transfer the
calibration data to that assembly.
A15 CPU
Troubleshooting Modules 1b-265
A15.9020
You have lost both EEROM and backed-up RAM. This
means that all hardware conguration data and all
rmware correction are lost. Before the instrument will
perform properly you must complete the following steps
in the order given.
1. Replace the A15 assembly.
2. Install any rmware diagnostic patches as required
(the installation instructions for A15 should indicate
which patches are required and how to install them).
3. Using the instrument level troubleshooting (ILT.000),
run the diagnostics to isolate any additional problems.
4. Recreate the hardware conguration data (you will
need to contact Agilent Technologies for instructions
or assistance).
5. Run the diagnostics and solve any additional problems
as required.
6. Recreate all the calibration data (use the performance
tests and adjustments).
1b-266 Troubleshooting Modules
A15 CPU
A16, A17, A18 Power Supply Troubleshooting
WARNING
A16, A17, A18 Power Supply
When the instrument is connected to AC line power
or the A18 high voltage neon indicator is on, there
are voltages present that can cause personal injury
or death. Only trained, qualied personnel, who
are aware of the hazards involved, should perform
service on this instrument with its protective covers
removed. An isolation transformer must be used
during all these procedures.
Observe all safety practices. Remove all
jewelry/metal that can short to ground.
Troubleshooting Modules 1b-267
A16.000
Troubleshooting power supplies is dangerous. Be extra
cautious. Perform a complete visual inspection of the
instrument and resolve any safety issues as required.
Continue to A16.100.
A16.100
Do the following:
1. Set the line power switch to standby.
2. Disconnect the AC line power cord.
3. Remove the instrument's top cover.
4. Wait for all the indicators in the power supply section
to go out.
5. Completely remove the following assemblies:
A16 post regulator.
A17 rectier and lter.
A18 switching regulator.
6. Inspect the line fuse on the rear of the instrument.
Replace it, if necessary.
7. Connect the instrument to AC line power using an
isolation transformer. Do not turn the instrument on.
8. Listen and watch. The instrument should remain
inactive.
9. Disconnect the AC line power cord.
10. Inspect the line fuse (it should be undamaged).
Does the instrument remain inactive and is the line fuse
undamaged?
Go To A16.200
1b-268 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.101
Inspect A17 and A18 for signs of physical damage. On
the A18 assembly, look closely at the large resistors
underneath and adjacent to the large heat sinks on A18.
Check the fuses on A17 and A18 (one each). If they are
open, replace them. Then, using the following table, go
to the indicated paragraph.
Either
Fuse Open?
Either A17 or
A18 Damaged?
Go To
Paragraph
Yes
Yes
No
No
Yes
No
Yes
No
A16.321
A16.321
A16.206
A16.102
A16.102
Continue with the following setup:
1. With AC line power disconnected, install A17 and A18.
2. Connect the instrument to AC line power using an
isolation transformer. Do not turn the instrument on.
3. Observe the indicators on A18 and the amber standby
light on the front panel of the instrument. Compare
their status to the following list:
Amber standby light (front panel) { ON.
A18 neon high voltage indicator (DS2) { ON.
A18 green +13.6 V LED (DS1) { ON.
A18 amber preregulator shutdown LED (DS7) { ON.
All other A18 LEDs { OFF.
Were all indicators correct and does the instrument still
appear safe to operate?
Go To A16.300
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-269
A16.103
1. Turn the instrument on and make the following
observations during power up.
Amber standby light (front panel) { OFF.
Green power-on light (front panel) { ON.
A18 neon high voltage indicator (DS2) { ON.
A18 green +13.6 V LED (DS1) { ON.
A18 amber preregulator shutdown LED (DS7) { OFF.
All other A18 LEDs { OFF.
2. Turn the instrument to standby.
Were all indicators correct and does the instrument still
appear safe to operate?
Go To A16.500
1b-270 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.104
1. Verify that the line switch is in standby.
2. Disconnect the AC line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Install A16.
5. Reconnect AC line power through an isolation
transformer.
6. Observe the amber standby light and the green
power-on light on the front panel of the instrument.
Also check the indicators on A16 and A18. Compare
their status to the following list:
Amber standby light { ON.
Green power-on light { OFF.
A18 neon high voltage indicator (DS2) { ON.
A18 green +13.6 V LED (DS1) { ON.
A18 amber preregulator shutdown LED (DS7) { ON.
Other A18 LEDs { OFF.
A16 green +22 V standby LED { ON.
Other A16 LEDs { OFF.
Were all indicators correct and does the instrument still
appear safe to operate?
Go To A16.600
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-271
A16.105
1. Turn the line power switch to on and make the
following observations during power up:
Amber standby light { OFF (front panel).
Green power-on light { ON (front panel).
A18 neon high voltage indicator (DS2) { ON.
A18 green +13.6 V LED (DS1) { ON.
A18 amber preregulator shutdown LED (DS7) { OFF.
All other A18 LEDs { OFF.
A16 green LEDs (from left to right, component side
or from right to left when facing the front of the
instrument):
+22 V STBY { ON.
+5 V { ON.
+8 V { ON.
+15 V { ON.
+5 VHD { ON.
05 V { ON.
015 V { ON.
040 V { ON.
A16 red LEDs { OFF.
The fan is operating.
2. Ignore any activity on the front panel display.
3. Turn the line power switch OFF.
Were all the indicators correct and does the instrument
appear safe to operate?
Go To A16.700
1b-272 Troubleshooting Modules
Go To ILT.000
A16, A17, A18 Power Supply
A16.200
Do the following:
1. Disconnect the AC line power cord.
2. Wait for all the indicators in the power supply section
to go out.
3. Remove the rear panel completely (refer to the
disassembly and replacement procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide as
required).
4. Disconnect and inspect the 8-pin line switch connector,
AC voltage selection switch, line module, fuse
holder and other attached hardware for damage or
discoloration.
5. Inspect the motherboard.
Do the parts appear damaged?
Continue
A16, A17, A18 Power Supply
Go To A16.207
Troubleshooting Modules 1b-273
A16.201
Measure the resistance of the three line power
connections (high, low and ground) with reference to
the instrument chassis. High line and low line resistance
to ground should be 1 M
. The ground connection
resistance to instrument chassis should be 0.1 .
Go To A16.207
Continue
A16.202
Measure the resistance between high line and low line.
Go To A16.208
1b-274 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.203
Reconnect the rear panel, 8-pin line switch connector
to the motherboard (A22J9). Measure the resistance
between high line and low line.
Continue
A16, A17, A18 Power Supply
Go To A16.207
Troubleshooting Modules 1b-275
A16.204
WARNING
Direct connections to line voltages will be exposed
during this and subsequent steps. Ensure that line
power is completely removed.
Ensure that all power is disconnected and all capacitors
are discharged. Remove the small red cover (high voltage
cover) at the bottom rear of the instrument. The cover
is held in place with three screws. Two screws are
located on either side of XA18J1 (A18 motherboard
connector) and are accessed from the top of the
motherboard. The third screw is located at the rear edge
of the motherboard. You may have to remove the rear
panel to access this third screw. Inspect the line power
traces on the motherboard. Look for signs of shorting,
discoloration, or other signs of damage.
Are any of the line power traces on the motherboard
damaged?
Continue
Go To A16.209
A16.205
Inspect A17 and A18. Check for signs of physical
damage. On the A18 assembly, look closely at the large
resistors underneath and adjacent to the large heat sinks
on A18. Check the fuses on A17 and A18 (one each). If
they are open replace them.
Do A17 and A18 appear damaged?
Continue
1b-276 Troubleshooting Modules
Go To A16.210
A16, A17, A18 Power Supply
A16.206
If the problem was open fuses on either A17 or A18, it is
unlikely that replacing the fuses will solve the problem
completely. Typically, open fuses are an indication of
other failures. However, you may want to replace the
fuses and restart troubleshooting at A16.000. Otherwise,
do the following:
Replace the following:
1. AC voltage selection switch/wiring harness.
2. FL1 line module-ltered.
3. Fuse and fuse holder.
4. Other line-related hardware that shows any amount of
damage.
Inspect and replace, if damaged, the following:
1. A17 rectier/lter.
2. A18 switching regulator.
3. A16 post regulator.
4. A22 motherboard (inspect A22 closely before
replacing).
Refer to the disassembly instructions and replaceable
parts information in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept
CW Generator Service Guide as necessary. Restart
troubleshooting at A16.0000.
A16.207
Replace the following:
FL1, line module - ltered.
AC voltage selection switch/wiring harness.
Fuse and fuse holder.
Any other damaged or discolored parts or assemblies.
Replace the motherboard if damaged.
Restart troubleshooting at A16.000.
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-277
A16.208
Replace FL1, line module - ltered and AC voltage
selection switch/wiring harness and then restart
troubleshooting at A16.000.
A16.209
The A22 motherboard has a defect in the traces carrying
line power. Do not attempt to repair A22. Replace A22
(go to A22.9000). Inspect A17 and A18. Check for signs
of physical damage. On the A18 assembly, look closely
at the large resistors underneath and adjacent to the
large heat sinks on A18. Check the fuses on A17 and
A18 (one each). If they are open, replace them. Restart
troubleshooting with A16.000.
A16.210
Do not attempt to repair either assembly. Replace A17
and A18 as required. Reassemble the instrument and
restart troubleshooting from the beginning of instrument
level troubleshooting. If you have already taken this
action, refer to A16.206 for additional information.
1b-278 Troubleshooting Modules
A16, A17, A18 Power Supply
A16.300
Are any A18 indicators on?
Go To A16.302
Continue
A16.301
Select the rst correct condition and go to the indicated
paragraph.
Neon
HIGH VLT
Green
+13.6 V
Amber
PRERGSHTDWN
Go To
Paragraph
OFF
ON
ON
ON
{
OFF
ON
ON
{
{
OFF
ON
A18.9000
A16.320
A16.360
A16.380
A dash ( { ) indicates a don't care condition.
A16.302
Set the line power switch to standby. Disconnect the AC
line cord and check the line fuse.
Is the line fuse good?
Go To A16.400
A16, A17, A18 Power Supply
Go To A16.204
Troubleshooting Modules 1b-279
A16.320
Do the following:
1. Disconnect the instrument from line power.
2. Wait for all the indicators in the power supply section
to go out.
3. Carefully remove A18 and discharge all the large
capacitors.
4. Check the fuse on A18 (A18F1).
Is A18F1 good?
Continue
Go To A18.9000
A16.321
Reinstall A16. Then measure the resistance of XA16J1-36
to ground.
Continue
1b-280 Troubleshooting Modules
Go To A18.9000
A16, A17, A18 Power Supply
A16.322
Remove A16. Then measure the resistance of XA16J1-36
to ground.
Continue
Go To A16.9000
A16.323
Remove the front panel completely. Refer to the
disassembly procedures in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept
CW Generator Service Guide. Measure the resistance of
XA16J1-36 to ground.
Go To A16.329
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-281
A16.324
Connect W2 from the source module interface assembly
(A2) to the motherboard (A22). Then measure the
resistance of XA16J1-36 to ground.
Go To A2.9000
1b-282 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.325
Do the following:
1. Connect W3 from the front panel processor (A3) to the
motherboard (A22).
2. Disconnect the two ribbon cables (W1, W4) that
connect the A3 front panel processor to the A21
display.
3. Measure the resistance of XA16J1-36 to ground.
Go To A3.9000
Go To A21.9000
A16.329
Since all of the connections to the +13.6 V power supply
have been removed and the resistance measurement is
still less than 100 , there is a short on the motherboard.
Go to A22.9000 (replace the motherboard).
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-283
A16.360
Do the following:
1. Set the line power switch to standby.
2. Disconnect the instrument from line power and wait
until all A18 indicators are o.
3. Remove A18.
4. With the line switch in the standby position, measure
the resistance of XA18J1-25 to ground. Pin 25 is
accessible from the component side (top) of the
motherboard. It is the pin at the left rear corner of
connector XA18J1 as viewed with the instrument
front panel facing towards you.
Continue
1b-284 Troubleshooting Modules
Go To A18.9000
A16, A17, A18 Power Supply
A16.361
Measure the resistance of A22J1-33 to ground with the
power switch in standby. Note that the numbering on the
A22J1 connector may be incorrect. Pin 33 is the left-rear
corner of A22J1.
Continue
Go To A16.365
A16.362
Remove the front panel and check the seating of
the ribbon cables connecting the front panel to the
motherboard. If no seating problem is found, check the
ribbon cable and replace it if damaged. Otherwise, go to
A2.9000.
A16.365
An open exists between XA18J1-25 and A22J1-33. Do
not attempt to repair this open. Go to A22.9000, and
replace the motherboard.
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-285
A16.380
Select the rst correct condition and go to the indicated
paragraph.
Red (DS6) Red (DS5) Red (DS4) Red (DS3) Go To
CURR LIMIT OVERVOLT OVERCURR OVERTEMP Paragraph
OFF
ON
ON
OFF
OFF
OFF
{
{
{
ON
ON
OFF
{
{
{
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
A16.381
A16.383
A16.384
A16.384
A16.384
A16.390
A dash ( { ) indicates a don't care condition.
A16.381
Has the instrument overheated (is the instrument very
warm to the touch)?
Go To A18.9000
1b-286 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.382
There are several things that could cause overheating.
Two things to check are: the air ow and environment.
For instance, is the fan blocked? Is the airow on the
sides of the instrument blocked? If the instrument is in
a racked system, is the direction of airow the same as
other instruments in the system? If these conditions do
not exist, take the following action:
1. Check all fuses on A16. There are six small plug-in
fuses and two solder-in fuses. All the fuses are close
to the bottom of the board.
2. Check the fan connection to the motherboard (remove
the rear panel and possibly the RF deck to gain
access). See the disassembly instructions in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide for more
information.
3. If these don't x the problem, then consider one or
more of the following:
a. Replace the fan (refer to the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series
Swept CW Generator Service Guide for replacement
instructions).
b. Replace A16 (go to A16.9000).
c. Replace A17 (go to A17.9000).
A16.383
Refer to A16.382. In addition, consider A18 for
replacement (go to A18.9000). Finally, return to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-287
A16.384
Perform the following:
1. Set the line power switch to standby.
2. Disconnect power and wait for all indicators in the
power supply to go out.
3. Remove A17 and A18.
Go to A16.205.
A16.385
In this case, change both A18 and A17. Go to A17.9000,
then A18.9000. Then restart troubleshooting at A16.000.
When you are condent that the power supply is good,
begin troubleshooting at ILT.000.
A16.390
Do the following:
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Remove A15.
4. Connect the instrument to AC line power using an
isolation transformer and set the line power switch to
on.
Is the A18 +5 VHD OVER CURRENT indicator on?
Go To A15.9000
1b-288 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.391
Do the following:
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Install A15.
5. Install A16.
6. Remove the front panel and disconnect the ribbon
cables W2 and W3 that connect the front panel to the
motherboard.
7. Connect the instrument to AC line power using an
isolation transformer and set the line power switch to
on.
Is the A18 +5 VHD OVER CURRENT indicator on?
Continue
Go To A16.395
A16.392
Do the following:
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect W2.
5. Connect the instrument to AC line power through an
isolation transformer and set the line power switch to
on.
Is the A18 +5 VHD OVER CURRENT indicator on?
Go To A3.9000
A16, A17, A18 Power Supply
Go To A2.9000
Troubleshooting Modules 1b-289
A16.395
Do the following:
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Install A15.
5. Remove A14.
6. Connect the instrument to AC line power using an
isolation transformer and set the line power switch to
on.
Is the A18 +5 VHD OVER CURRENT indicator on?
Go To A14.9000
1b-290 Troubleshooting Modules
Go To A16.385
A16, A17, A18 Power Supply
A16.400
Do the following:
1. Replace the line fuse.
2. Remove the rear panel.
3. Disconnect A22J10 wiring harness from the
motherboard. This wiring harness connects the 22 V
toroidal transformer to the motherboard.
4. Ensure that the 22 V wiring harness is out of the way
and then replace the rear panel.
5. Connect the instrument to AC line power using an
isolation transformer. Do not turn on the instrument.
Are any A18 indicators on?
Go To A16.205
Continue
A16.401
Replace the 22 volt transformer and then go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-291
A16.500
Select the rst correct condition and go to the indicated
paragraph.
Neon
HIGH VLT
Green
+13.6 V
Amber
PREREGSHTDWN
Go To
Paragraph
OFF
ON
ON
{
OFF
ON
{
{
{
A16.205
A16.560
A16.380
A dash ( { ) indicates a don't care condition.
A16.560
Do the following:
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Install A16.
5. Remove the front panel and disconnect the ribbon
cables W2 and W3 that connect the front panel to the
motherboard.
6. Connect the instrument to AC line power using an
isolation transformer and set the line power switch to
on.
Is the +13.6 V LED (green, DS1) on?
Go To A16.320
1b-292 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.561
Do the following:
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect W2.
5. Connect the instrument to AC line power using an
isolation transformer and set the line power switch to
on.
Is the +13.6 V LED (green, DS1) on?
Go To A2.9000
Continue
A16.562
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect W3.
5. Disconnect the two ribbon cables (W1, W4) that
connect the A3 front panel processor to the A21
display.
6. Connect the instrument to AC line power using an
isolation transformer and set the line power switch to
on.
Is the +13.6 V LED (green, DS1) on?
Go To A3.9000
A16, A17, A18 Power Supply
Go To A16.1000
Troubleshooting Modules 1b-293
A16.600
Were the A18 indicators correct in the previous step?
Go To A16.9000
Go To A16.5000
A16.700
Were all A18 indicators correct?
Go To A16.720
Go To A16.701
A16.701
Did the fan turn properly when power was turned on?
Go To A16.710
Continue
A16.702
Are any red A16 LEDs on?
Continue
1b-294 Troubleshooting Modules
Go To A16.4000
A16, A17, A18 Power Supply
A16.703
Measure the voltage of the +13.6 Vdc supply at
XA16J1-36 to ground.
Continue
Go To A16.9000
A16.704
Either an open exists on the motherboard between
XA16J1-36 and XA18P1-49, or A18 is faulty. Verify the
open with an ohmmeter. If an open does exist, do not
attempt to repair it but go to A22.9000. If no open exists,
go to A18.9000.
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-295
A16.710
Do the following:
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
5. Remove the rear panel and disconnect the fan.
6. Check all fuses on A16. There are six small plug-in
fuses and two solder-in fuses. All the fuses are close
to the bottom of the board.
7. Replace any fuses that are open.
8. Reinstall A16.
9. Connect the instrument to AC line power using an
isolation transformer and set line power to ON (the fan
should still be disconnected).
Continue with A16.711.
A16.711
Measure the voltage at XA16J1-1.
Go To A16.718
1b-296 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.712
Wait 2 to 3 minutes. Measure the voltage at XA16J1-41
for a positive voltage greater than 2.0 Vdc. This voltage
may increase in value while the measurement is taken.
Go To A16.718
Continue
A16.713
Measure the voltage at A22J11-3. This connector is
located at the right-rear of the instrument (by the fan).
Go To A16.716
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-297
A16.714
Wait 2 to 3 minutes. Measure the voltage at A22J11-1 for
a positive voltage greater than 2.0 Vdc. This voltage may
increase in value while the measurement is taken. This
connector is located at the right-rear of the instrument
(by the fan).
Go To A16.716
Continue
A16.715
The fan is either defective or the instrument has an
intermittent connection. Replace the fan and then go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
1b-298 Troubleshooting Modules
A16, A17, A18 Power Supply
A16.716
Reconnect the fan.
There is an open in the motherboard between one of the
following two points.
XA16J1-1 and A22J11-3.
XA16J1-41 and A22J11-1.
Is a jumper wire on the motherboard an acceptable
repair?
Go To A22.9000
Continue
A16.717
Repair the motherboard and go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
A16.718
Do the following:
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect the fan.
Go to A16.9000.
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-299
A16.720
Do the following:
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Reconnect the fan.
5. Remove A18.
6. Check fuse A18F1.
Is the fuse damaged?
Go To A16.9000
1b-300 Troubleshooting Modules
Go To A16.703
A16, A17, A18 Power Supply
A16.1000
With the line power switch set to on and the top cover
removed, check the A16 power supply LEDs in the order
shown. Choose the rst LED that is o and go to the
indicated paragraph. If all LEDs are on, go to A16.1001.
LED Name
040V
+5VHD
+22V STBY
015V
05V
+5V
+8V
+15V
Go To
Paragraph
A16.4200
A16.9000
A16.4300
A16.4400
A16.4500
A16.4600
A16.4700
A16.4800
A16.1001
Is the red A16 PRS LED (post regulator shutdown) on?
Continue
Go To A16.9000
A16.1002
Is the red A16 PRA LED (post regulator alert) on?
Continue
A16, A17, A18 Power Supply
Go To A16.4002
Troubleshooting Modules 1b-301
A16.2000
Note
Measure the power supply voltages in the order given.
Measure all of the voltages at the test points on the top
edge of A16. If a voltage is out of specication, go to the
paragraph indicated.
These power supply voltages and tolerances rely on a
DC voltmeter accuracy of better than 6 0.5%. If your
voltmeter is less accurate, compensate accordingly.
Power Supply
Name
Nominal
Voltage
Tolerance
Go To
Paragraph
040V
040 Vdc
+22V STBY
015V
05V
+5V
+8V
+15V
+5VHD
H+5VAUp
+22 Vdc
015.07 Vdc
05.2 Vdc
+5.2 Vdc
+8 Vdc
+15.12 Vdc
TTL Hi
TTL Hi
60.8 Vdc
60.4 Vdc
60.3 Vdc
60.1 Vdc
60.1 Vdc
60.2 Vdc
60.3 Vdc
A16.9000
A16.9000
A16.9000
A16.9000
A16.9000
A16.9000
A16.9000
A17.9000
A16.9000
TTL Hi
TTL Hi
If no errors occur, go to \Special Cases" or restart
troubleshooting with ILT.000.
1b-302 Troubleshooting Modules
A16, A17, A18 Power Supply
A16.4000
Is the red A16 PRS LED (post regulator shutdown) o?
Go To A16.4100
Continue
A16.4001
Are all green LEDs on the A16 assembly on?
Go To A16.9000
Continue
A16.4002
Do the following:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A15.
5. Reconnect the instrument to line power using an
isolation transformer.
6. Set the line power switch to on.
Is the red A16 PRA LED (post regulator alert) on?
Go To A15.9000
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-303
A16.4003
Do the following:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Install A15.
5. Remove the front panel and disconnect ribbon cable
W3 from the motherboard.
6. Reconnect the instrument to line power using an
isolation transformer.
7. Set the line power switch to on.
Is the red A16 PRA LED still on?
Go To A3.9000
1b-304 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4004
Do the following:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
Measure the resistance from XA16J1-78 to ground.
Go To A22.9000
A16, A17, A18 Power Supply
Go To A16.4900
Troubleshooting Modules 1b-305
A16.4100
With the line power switch set to on and the top cover
removed, check the A16 power supply LEDs in the order
given. Choose the rst LED that is o and go to the
indicated paragraph. If all LEDs are on, go to A16.9000.
LED Name
040V
+5VHD
+22V STBY
015V
05V
+5V
+8V
+15V
Go To
Paragraph
A16.4200
A16.9000
A16.4300
A16.4400
A16.4500
A16.4600
A16.4700
A16.4800
A16.4200
Measure the 040 Vdc unregulated supply at XA16J1-23
and 63.
Continue
1b-306 Troubleshooting Modules
Go To A16.4202
A16, A17, A18 Power Supply
A16.4201
Do the following:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
Measure the 040 Vdc unregulated supply from A17 to
A16 at XA16J1-23 and 63.
Go To A17.9000
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-307
A16.4202
Do the following if not already performed:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
Measure the resistance of the 040 Vdc supply to ground
(XA16J1-62 to ground).
Continue
1b-308 Troubleshooting Modules
Go To A16.4220
A16, A17, A18 Power Supply
A16.4203
Remove the following assemblies:
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
Measure the resistance of the 040 Vdc supply to ground
(XA16J1-62 to ground).
Continue
A16, A17, A18 Power Supply
Go To A16.4210
Troubleshooting Modules 1b-309
A16.4204
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the RF deck. Measure the resistance of the 040 Vdc
supply to ground (XA16J1-62 to ground).
Go To A22.9000
1b-310 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4205
Reinstall the RF deck in the service position. Refer to
the disassembly procedures in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept CW
Generator Service Guide. Remove the ribbon cables that
connect the microcircuits to the RF deck.
Measure the resistance of the 040 Vdc supply to ground
(XA16J1-62 to ground).
Go To A20.9000
Continue
A16.4206
Reconnect the microcircuit ribbon cables one at a time
while measuring the resistance of the 040 Vdc to ground
(XA16J1-62 to ground). Replace the microcircuit that
causes a resistance measurement of < 100 . Also,
check the 040 V fuse on A16 and replace it if open. If
no microcircuit causes a low resistance measurement,
you may have removed the defect in the disassembly
process or the problem may be intermittent. Go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-311
A16.4210
Reinstall the previously removed assemblies one at a time
while measuring the resistance of the 040 Vdc supply to
ground (XA16J1-62 to ground). Replace the assembly
that causes a resistance measurement of < 100 . Also
check the 040 V fuse on A16 and replace it if defective.
If no assembly causes a low resistance measurement,
you may have removed the defect in the disassembly
process or the problem may be intermittent. Go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A16.4220
Check the 040 V fuse on A16.
Is the fuse defective?
Go To A16.7000
Continue
A16.4221
Do the following:
1. Replace the defective fuse.
2. Install A16.
3. Connect the instrument to line power using an
isolation transformer.
4. Set the line power switch to on.
Is the green A16 040 V LED on?
Go To A16.7000
Continue
Replacing the fuse seems to have xed the problem, but
this simple solution is suspect. You may want to monitor
1b-312 Troubleshooting Modules
A16, A17, A18 Power Supply
the instrument for several minutes with the covers on to
insure that an intermittent problem does not exist. Go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
A16.4300
Do the following if not already performed:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
Measure the resistance of the +22 Vdc supply to ground
(XA16J1-2, 42 to ground).
Go To A23.9000
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-313
A16.4301
Do the following if not already performed:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
Measure the resistance of the +22 Vdc supply to ground
(XA16J1-43 to ground).
Continue
1b-314 Troubleshooting Modules
Go To A16.9000
A16, A17, A18 Power Supply
A16.4302
Remove A12. Measure the resistance of +22 Vdc to
ground (XA16J1-43 to ground).
Go To A22.9000
A16, A17, A18 Power Supply
Go To A12.9000
Troubleshooting Modules 1b-315
A16.4400
Measure the voltage of the 015 Vdc unregulated supply
from A17 to A16 at XA16J1-27, 28, 67, and 68.
Continue
WARNING
1b-316 Troubleshooting Modules
Go To A16.4402
When the instrument is connected to AC line power
or the A18 high voltage neon indicator is on, there
are voltages present that can cause personal injury
or death. Only trained, qualied personnel, who
are aware of the hazards involved, should perform
service on this instrument with its protective covers
removed. An isolation transformer must be used
during all these procedures.
Observe all safety practices. Remove all
jewelry/metal that can short to ground.
A16, A17, A18 Power Supply
A16.4401
Do the following:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
5. Connect the instrument to line power using an
isolation transformer.
6. Set the line power switch to on.
Measure the 015 Vdc unregulated supply from A17 to
A16 at XA16J1-27, 28, 67, and 68.
Go To A17.9000
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-317
A16.4402
Do the following if not already performed:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
Measure the resistance of the 015 Vdc supply to ground
(XA16J1-25, 26, 65, and 66 to ground).
Continue
1b-318 Troubleshooting Modules
Go To A16.4420
A16, A17, A18 Power Supply
A16.4403
Remove the following assemblies:
A4 fractional-N.
A5 YO phase detector.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
A15 microprocessor.
A6 sampler.
Note
Be sure to disconnect the rigid cable connected to the
input of A6 before removing A6. Otherwise damage to
the cable, A6, and possibly the lter (FL2) can occur.
Measure the resistance of the 015 Vdc supply to ground
(XA16J1-25, 26, 65, and 66 to ground).
Continue
A16, A17, A18 Power Supply
Go To A16.4410
Troubleshooting Modules 1b-319
A16.4404
Follow the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the RF deck.
Measure the resistance of the 015 Vdc supply to ground
(XA16J1-25, 26, 65, and 66 to ground).
Go To A16.4430
1b-320 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4405
Reinstall the RF deck in the service position. Refer to
the disassembly procedures in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept CW
Generator Service Guide as needed. Remove the ribbon
cables that connect the microcircuits to the RF deck.
Measure the resistance of the 015 Vdc supply to ground
(XA16J1-25, 26, 65, and 66 to ground).
Go To A20.9000
Continue
A16.4406
Reconnect the microcircuit ribbon cables one at a time
while measuring the resistance of the 015 Vdc supply
to ground (XA16J1-25, 26, 65, and 66 to ground).
Replace the microcircuit that causes a < 75 resistance
measurement. Also, check the 015 V fuse on A16 and
replace it if open.
Did a microcircuit cause a low resistance measurement?
Go To A16.4408
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-321
A16.4407
Go to the paragraph indicated below to replace the faulty
microcircuit.
Microcircuit
A29 amp/lter
A28 amp/multiplier
A26 YO
A24 low band
A31 attenuator
A32 amp/doubler
A33 amp switch
A38 dual modulator
A38 AM modulator (Opt. 006)
A42 pulse mod switched lter
Go To
Paragraph
RF.2990
RF.2890
RF.2690
RF.2490
RF.3190
RF.3290
RF.3390
RF.3890
RF.3890
RF.4290
A16.4408
You may have removed the defect in the disassembly
process or the problem may be intermittent. Also check
the 015 V fuse on A16 and replace it if open. Go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A16.4410
Reinstall the previously removed assemblies one at a
time while measuring the resistance of the 015 Vdc
to ground (XA16J1-25, 26, 65, and 66 to ground). If
the assembly does not fail (a failure is a resistance
measurement of < 75 ), reinstall another assembly and
repeat the measurement. When the defective assembly
is identied, go to the 9000 paragraph for that assembly
for replacement instructions. For example, for A4, go to
A4.9000; for A5, go to A5.9000, and so on.
If no assembly causes a low resistance measurement,
you may have removed the defect in the disassembly
1b-322 Troubleshooting Modules
A16, A17, A18 Power Supply
process or the problem may be intermittent. Also check
the 015 V fuse on A16 and replace it if open. Go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A16.4420
Check the 015 V fuse on A16.
Is the fuse open?
Go To A16.7000
Continue
A16.4421
Do the following:
1. Replace the defective fuse.
2. Install A16.
3. Connect the instrument to line power using an
isolation transformer.
4. Set the line power switch to on.
Is the green 015 V LED on?
Go To A16.7000
Continue
Replacing the fuse seems to have xed the problem, but
this simple solution is suspect. You may want to monitor
the instrument for several minutes with the covers on to
insure that an intermittent problem does not exist. Go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-323
A16.4430
Follow the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the rear panel and disconnect ribbon cable, W31 from the
motherboard. Measure the resistance of the 015 Vdc
supply to ground (XA16J1-25, 26, 65, and 66 to ground).
Go To A22.9000
1b-324 Troubleshooting Modules
Go To A19.9000
A16, A17, A18 Power Supply
A16.4500
Measure the voltage of the 05 Vdc unregulated supply
from A17 to A16 at XA16J1-20, 21, 60, and 61.
Continue
A16, A17, A18 Power Supply
Go To A16.4502
Troubleshooting Modules 1b-325
A16.4501
Do the following:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
5. Connect the instrument to line power using an
isolation transformer.
6. Set the line power switch to on.
Measure the voltage of the 05 Vdc unregulated supply
from A17 to A16 at XA16J1-20, 21, 60, and 61.
Go To A17.9000
1b-326 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4502
Do the following if not already performed:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
Measure the resistance of the 05 Vdc supply to ground
(XA16J1-18, 19, 58, and 59 to ground).
Continue
A16, A17, A18 Power Supply
Go To A16.4520
Troubleshooting Modules 1b-327
A16.4503
Remove the following assemblies:
A4 fractional-N.
A5 YO phase detector.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
A15 microprocessor.
A6 sampler.
Note
Be sure to disconnect the rigid cable connected to the
input of A6 before removing A6. Otherwise damage to
the cable, A6, and possibly the lter (FL2) can occur.
Measure the resistance of the 05 Vdc supply to ground
(XA16J1-18, 19, 58, and 59 to ground).
Continue
1b-328 Troubleshooting Modules
Go To A16.4510
A16, A17, A18 Power Supply
A16.4504
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the RF deck.
Measure the resistance of the 05 Vdc supply to ground
(XA16J1-18, 19, 58, and 59 to ground).
Go To A16.4530
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-329
A16.4505
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide and reinstall
the RF deck in the service position. Remove the ribbon
cables that connect the microcircuits to the RF deck.
Measure the resistance of the 05 Vdc supply to ground
(XA16J1-18, 19, 58, and 59 to ground).
Go To A20.9000
Continue
A16.4506
Reconnect the microcircuit ribbon cables one at a time
while measuring the resistance of the 05 Vdc supply
to ground (XA16J1-18, 19, 58, and 59 to ground). Also
check the 05 V fuse on A16 and replace it if open.
Does a microcircuit cause a resistance measurement of
< 75 ?
Go To A16.4508
1b-330 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4507
Go to the paragraph indicated to replace the faulty
microcircuit.
Microcircuit
A29 amp/lter
A28 amp/multiplier
A26 YO
A24 low band
A31 attenuator
A32 amp/doubler
A33 amp switch
A38 dual modulator
A38 AM modulator
(Opt. 006)
A42 pulse mod
switched lter
Go To
Paragraph
RF.2990
RF.2890
RF.2690
RF.2490
RF.3190
RF.3290
RF.3390
RF.3890
RF.3890
RF.4290
A16.4508
You may have removed the defect in the disassembly
process or the problem may be intermittent. Also check
the 05 V fuse on A16 and replace it if open. Go to
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-331
A16.4510
Reinstall the previously removed assemblies one at a
time while measuring the resistance of the 05 Vdc
supply to ground (XA16J1-18, 19, 58, 59 to ground).
If the assembly does not fail (a failure is a resistance
measurement of < 75 ), reinstall another assembly and
repeat the measurement. When the defective assembly
is identied, go to the 9000 paragraph for that assembly
for replacement instructions. For example, for A4, go to
A4.9000; for A5, go to A5.9000, and so on.
If no assembly causes a low resistance measurement, you
may have removed the defect in the disassembly process
or the problem may be intermittent. Also check the 05 V
fuse on A16 and replace it if open. Go to Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
A16.4520
Check the 05 V fuse on A16.
Is the fuse open?
Go To A16.7000
1b-332 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4521
Do the following:
1. Replace the defective fuse.
2. Install A16.
3. Connect the instrument to line power using an
isolation transformer.
4. Set the line power switch to on.
Is the green 05 V LED on?
Go To A16.7000
Continue
Replacing the fuse seems to have xed the problem, but
this simple solution is suspect. You may want to monitor
the instrument for several minutes with the covers on to
insure that an intermittent problem does not exist. Go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-333
A16.4530
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the rear panel and disconnect ribbon cable, W31, from
the motherboard. Measure the resistance of the 05 Vdc
supply to ground (XA16J1-18, 19, 58, and 58 to ground).
Go To A22.9000
1b-334 Troubleshooting Modules
Go To A19.9000
A16, A17, A18 Power Supply
A16.4600
Measure the voltage of the +5 Vdc unregulated supply
from A17 to at XA16J1-15, 16, 55, and 56.
Continue
A16, A17, A18 Power Supply
Go To A16.4602
Troubleshooting Modules 1b-335
A16.4601
Do the following:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
5. Connect the instrument to line power using an
isolation transformer.
6. Set the line power switch to on.
Measure the voltage of the +5 Vdc unregulated supply
from A17 to A16 at XA16J1-15, 16, 55, and 56.
Go To A17.9000
1b-336 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4602
Do the following if not already performed:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
Measure the resistance of the +5 Vdc supply to ground
(XA16J1-13, 14, 39, 40, 53, 54, 79, and 80 to ground).
Continue
A16, A17, A18 Power Supply
Go To A16.4620
Troubleshooting Modules 1b-337
A16.4603
Remove the following assemblies:
A4 fractional-N.
A5 YO phase detector.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
A15 microprocessor.
A6 sampler.
Note
Be sure to disconnect the rigid cable connected to the
input of A6 before removing A6. Otherwise damage to
the cable, A6, and possibly the lter (FL2) can occur.
Measure the resistance of the +5 Vdc supply to ground
(XA16J1-13, 14, 39, 40, 53, 54, 79, and 80 to ground).
Continue
1b-338 Troubleshooting Modules
Go To A16.4610
A16, A17, A18 Power Supply
A16.4604
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide and remove
the RF deck.
Measure the resistance of the +5 Vdc supply to ground
(XA16J1-13, 14, 39, 40, 53, 54, 79, and 80 to ground).
Go To A16.4630
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-339
A16.4605
Reinstall the RF deck in the service position. Refer to
the disassembly procedures in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept CW
Generator Service Guide. Remove the ribbon cables that
connect the microcircuits to the RF deck.
Measure the resistance of the +5 Vdc supply to ground
(XA16J1-13, 14, 39, 40, 53, 54, 79, and 80 to ground).
Go To A20.9000
Continue
A16.4606
Reconnect the microcircuit ribbon cables one at a time
while measuring the resistance of the +5 Vdc supply
to ground (XA16J1-13, 14, 39, 40, 53, 54, 79, and 80 to
ground). Finally, check the +5 V fuse on A16 and replace
it if open.
Did a microcircuit cause a resistance measurement of
< 75 ?
Go To A16.4608
1b-340 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4607
Go to the paragraph indicated to replace the faulty
microcircuit.
Microcircuit
A29 amp/lter
A28 amp/multiplier
A26 YO
A24 low band
A31 attenuator
A32 amp/doubler
A33 amp switch
A38 dual modulator
A38 AM modulator
(Opt. 006)
A42 pulse mod
switched lter
Go To
Paragraph
RF.2990
RF.2890
RF.2690
RF.2490
RF.3190
RF.3290
RF.3390
RF.3890
RF.3890
RF.4290
A16.4608
You may have removed the defect in the disassembly
process or the problem may be intermittent. Also check
the +5 V fuse on A16. Replace it if defective. Go to
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-341
A16.4610
Reinstall the previously removed assemblies one at a time
while measuring the resistance of the +5 Vdc supply
to ground (XA16J1-13, 14, 39, 40, 53, 54, 79, and 80
to ground). If the assembly does not fail (a failure is a
resistance measurement of < 75 ), reinstall another
assembly and repeat the measurement. When the
defective assembly is identied, go to the 9000 paragraph
for that assembly for replacement instructions. For
example, for A4, go to A4.9000; for A5, go to A5.9000,
and so on.
If no assembly causes a low resistance measurement, you
may have removed the defect in the disassembly process
or the problem may be intermittent. Also check the 05 V
fuse on A16 and replace it if open. Go to Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
A16.4620
Check the +5 V fuse on A16.
Is the fuse defective?
Go To A16.7000
1b-342 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4621
Do the following:
1. Replace the defective fuse.
2. Install A16.
3. Connect the instrument to line power using an
isolation transformer.
4. Set the line power switch to on.
Is the green +5 V LED on?
Go To A16.7000
Continue
Replacing the fuse seems to have xed the problem, but
this simple solution is suspect. You may want to monitor
the instrument for several minutes with the covers on to
insure that an intermittent problem does not exist. Go to
the Troubleshooting Foldout, block 1 (located just prior to
the \Special Cases" tab).
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-343
A16.4630
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the rear panel and disconnect ribbon cable, W31 from
the motherboard. Measure the resistance of the +5 Vdc
supply to ground (XA16J1-13, 14, 39, 40, 53, 54, 79, and
80 to ground).
Go To A22.9000
1b-344 Troubleshooting Modules
Go To A19.9000
A16, A17, A18 Power Supply
A16.4700
Measure the voltage of the +8 Vdc unregulated supply
from A17 to A16 at XA16J1-9, 10, 49, and 50.
Continue
A16, A17, A18 Power Supply
Go To A16.4702
Troubleshooting Modules 1b-345
A16.4701
Do the following:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
5. Connect the instrument to line power using an
isolation transformer.
6. Set the line power switch to on.
Measure the voltage of the +8 Vdc unregulated supply
from A17 to A16 at XA16J1-9, 10, 49, and 50.
Go To A17.9000
1b-346 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4702
Do the following if not already performed:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
Measure the resistance of the +8 Vdc supply to ground
(XA16J1-7, 8, 47, and 48 to ground).
Continue
A16, A17, A18 Power Supply
Go To A16.4720
Troubleshooting Modules 1b-347
A16.4703
Remove the following assemblies:
A4 fractional-N.
A5 YO phase detector.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
A15 microprocessor.
A6 sampler.
Note
Be sure to disconnect the rigid cable line connected to
the input of A6 before removing A6. Otherwise damage
to the cable, A6, and possibly the lter (FL2) can occur.
Measure the resistance of the +8 Vdc supply to ground
(XA16J1-7, 8, 47, and 48 to ground).
Continue
1b-348 Troubleshooting Modules
Go To A16.4710
A16, A17, A18 Power Supply
A16.4704
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the RF deck.
Measure the resistance of the +8 Vdc supply to ground
(XA16J1-7, 8, 47, and 48 to ground).
Go To A16.4730
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-349
A16.4705
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide and reinstall
the RF deck in the service position. Remove the ribbon
cables that connect the microcircuits to the RF deck.
Measure the resistance of the +8 Vdc supply to ground
(XA16J1-7, 8, 47, and 48 to ground).
Go To A20.9000
Continue
A16.4706
Reconnect the microcircuit ribbon cables one at a time
while measuring the resistance of the +8 Vdc supply to
ground (XA16J1-7, 8, 47, and 48 to ground). Also check
the +8 V fuse on A16. If defective, replace it.
Did a microcircuit cause a resistance measurement
< 10 k
?
Go To A16.4708
1b-350 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4707
Go to the paragraph indicated to replace the faulty
microcircuit.
Microcircuit
A29 amp/lter
A28 amp/multiplier
A26 YO
A24 low band
A31 attenuator
A32 amp/doubler
A33 amp switch
A38 dual modulator
A38 AM modulator
(Opt. 006)
A42 pulse mod
switched lter
Go To
Paragraph
RF.2990
RF.2890
RF.2690
RF.2490
RF.3190
RF.3290
RF.3390
RF.3890
RF.3890
RF.4290
A16.4708
You may have removed the defect in the disassembly
process or the problem may be intermittent. Also check
the +8 V fuse on A16. Replace it if defective. Go to the
Troubleshooting Foldout, block 1.
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-351
A16.4710
Reinstall the previously removed assemblies one at a
time while measuring the resistance of the +8 Vdc
supply to ground (XA16J1-7, 8, 47, and 48 to ground).
If the assembly does not fail (a failure is a resistance
measurement of < 10 k
), reinstall another assembly and
repeat the measurement. When the defective assembly
is identied, go to the 9000 paragraph for that assembly
for replacement instructions. For example, for A4, go to
A4.9000; for A5, go to A5.9000, and so on.
If no assembly causes a low resistance measurement,
you may have removed the defect in the disassembly
process or the problem may be intermittent. Also check
the +8 V fuse on A16. If defective, replace it. Go to
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A16.4720
Check the +8 V fuse on A16.
Is the fuse defective?
Go To A16.7000
1b-352 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4721
Do the following:
1. Replace the defective fuse.
2. Install A16.
3. Connect the instrument to line power using an
isolation transformer.
4. Set the line power switch to on.
Is the green +8 V LED on?
Go To A16.7000
Continue
Replacing the fuse seems to have xed the problem, but
this simple solution is suspect. You may want to monitor
the instrument for several minutes with the covers on to
insure that an intermittent problem does not exist. Go to
the Troubleshooting Foldout, block 1.
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-353
A16.4730
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the rear panel and disconnect ribbon cable W31 from
the motherboard. Measure the resistance of the +8 Vdc
supply to ground (XA16J1-7, 8, 47, and 48 to ground).
Go To A22.9000
1b-354 Troubleshooting Modules
Go To A19.9000
A16, A17, A18 Power Supply
A16.4800
Measure the voltage of the +15 Vdc unregulated supply
from A17 to A16 at XA16J1-32, 33, 72, and 73.
Continue
A16, A17, A18 Power Supply
Go To A16.4802
Troubleshooting Modules 1b-355
A16.4801
Do the following:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
5. Connect the instrument to line power using an
isolation transformer.
6. Set the line power switch to on.
Measure the voltage of the +15 Vdc unregulated supply
from A17 to A16 at XA16J1-32, 33, 72, and 73.
Go To A17.9000
1b-356 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4802
Do the following if not already performed:
1. Set line power switch to standby.
2. Disconnect the instrument from line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
Measure the resistance of the +15 Vdc supply to ground
(XA16J1-30, 31, 70, and 71 to ground).
Continue
A16, A17, A18 Power Supply
Go To A16.4820
Troubleshooting Modules 1b-357
A16.4803
Remove the following assemblies:
A4 fractional-N.
A5 YO phase detector.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
A15 microprocessor.
A6 sampler.
Note
Be sure to disconnect the rigid cable connected to the
input of A6 before removing A6. Otherwise damage to
the cable, A6 and possibly the lter (FL2) can occur.
Measure the resistance of the +15 Vdc supply to ground
(XA16J1-30, 31, 70, and 71 to ground).
Continue
1b-358 Troubleshooting Modules
Go To A16.4810
A16, A17, A18 Power Supply
A16.4804
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the RF deck.
Measure the resistance of the +15 Vdc supply to ground
(XA16J1-30, 31, 70, and 71 to ground).
Go To A16.4830
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-359
A16.4805
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide and reinstall
the RF deck in the service position. Remove the ribbon
cables that connect the microcircuits to the RF deck.
Measure the resistance of the +15 Vdc supply to ground
(XA16J1-30, 31, 70, and 71 to ground).
Go To A20.9000
Continue
A16.4806
Reconnect the microcircuit ribbon cables one at a time
while measuring the resistance of the +15 Vdc supply
to ground (XA16J1-30, 31, 70, and 71 to ground). Also
check the +15 V fuse on A16. If defective, replace it.
Did a microcircuit cause a resistance measurement of
< 10 k
?
Go To A16.4808
1b-360 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4807
Go to the paragraph indicated to replace the faulty
microcircuit.
Microcircuit
A29 amp/lter
A28 amp/multiplier
A26 YO
A24 low band
A31 attenuator
A32 amp/doubler
A33 amp switch
A38 dual modulator
A38 AM modulator
(Opt. 006)
A42 pulse mod
switched lter
Go To
Paragraph
RF.2990
RF.2890
RF.2690
RF.2490
RF.3190
RF.3290
RF.3390
RF.3890
RF.3890
RF.4290
A16.4808
You may have removed the defect in the disassembly
process or the problem may be intermittent. Also check
the +15 V fuse on A16. If defective, replace it.
Go to Troubleshooting Foldout, block 1.
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-361
A16.4810
Reinstall the previously removed assemblies one at a
time while measuring the resistance of the +15 Vdc
supply to ground (XA16J1-30, 31, 70, and 71 to ground).
If the assembly does not fail (a failure is a resistance
measurement of < 10 k
), reinstall another assembly and
repeat the measurement. When the defective assembly
is identied, go to the 9000 paragraph for that assembly
for replacement instructions. For example, for A4, go to
A4.9000; for A5, go to A5.9000, and so on.
If no assembly causes a low resistance measurement,
you may have removed the defect in the disassembly
process or the problem may be intermittent. Also check
the +15 V fuse on A16. If defective, replace it. Go to
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A16.4820
Check the +15 V fuse on A16.
Is the fuse defective?
Go To A16.7000
1b-362 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4821
Do the following:
1. Replace the defective fuse.
2. Install A16.
3. Connect the instrument to line power using an
isolation transformer.
4. Set the line power switch to on.
Is the green +15 V LED on?
Go To A16.7000
Continue
Replacing the fuse seems to have xed the problem, but
this simple solution is suspect. You may want to monitor
the instrument for several minutes with the covers on to
insure that an intermittent problem does not exist. Go to
the Troubleshooting Foldout, block 1.
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-363
A16.4830
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the rear panel and disconnect ribbon cable W31 from the
motherboard. Measure the resistance of the +15 Vdc
supply to ground (XA16J1-30, 31, 70, and 71 to ground).
Go To A22.9000
1b-364 Troubleshooting Modules
Go To A19.9000
A16, A17, A18 Power Supply
A16.4900
Do the following:
1. Set line power switch to standby.
2. Disconnect the AC line power cord.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove A16.
5. Measure the resistance of the +5 VAUp to ground
(XA16J1-76 to ground).
Continue
A16, A17, A18 Power Supply
Go To A16.9000
Troubleshooting Modules 1b-365
A16.4901
Remove the following assemblies:
A4 fractional-N.
A5 YO phase detector.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
A15 microprocessor.
Measure the resistance of the +5 VAUp to ground
(XA16J1-76 to ground).
Continue
1b-366 Troubleshooting Modules
Go To A16.4910
A16, A17, A18 Power Supply
A16.4902
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the RF deck. Also remove A6.
Note
Be sure to disconnect the rigid cable connected to the
input of A6 before removing A6. Otherwise damage to
the cable, A6 and possibly the lter (FL2) can occur.
Measure the resistance of the +5 VAUp to ground
(XA16J1-76 to ground).
Go To A16.4930
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-367
A16.4905
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide and reinstall
the RF deck in the service position. Remove the ribbon
cables that connect the microcircuits to the RF deck.
Measure the resistance of the +5 VAUp to ground
(XA16J1-76 to ground).
Go To A20.9000
Continue
A16.4906
Reconnect the microcircuit ribbon cables one at a time
while measuring the resistance of the +5 VAUp to ground
(XA16J1-76 to ground).
Did a microcircuit cause a resistance measurement of
< 1 k
?
Go To A16.4908
1b-368 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.4907
Go to the paragraph indicated to replace the faulty
microcircuit.
Microcircuit
A29 amp/lter
A28 amp/multiplier
A26 YO
A24 low band
A31 attenuator
A32 amp/doubler
A33 amp switch
A38 dual modulator
A38 AM modulator
(Opt. 006)
A42 pulse mod
switched lter
Go To
Paragraph
RF.2990
RF.2890
RF.2690
RF.2490
RF.3190
RF.3290
RF.3390
RF.3890
RF.3890
RF.4290
A16.4908
Reinstall A6. Measure the resistance of the +5 VAUp to
ground (XA16J1-76 to ground). If A6 causes a resistance
measurement of < 1 k
, go to A6.9000. If not, you may
have removed the defect in the disassembly process or
the problem may be intermittent. Go to Troubleshooting
Foldout, block 1.
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-369
A16.4910
Reinstall the previously removed assemblies one at a
time while measuring the resistance of the +5 VAUp to
ground (XA16J1-76 to ground). If the assembly does not
fail (a failure is a resistance measurement of < 1 k
),
reinstall another assembly and repeat the measurement.
When the defective assembly is identied, go to the 9000
paragraph for that assembly for replacement instructions.
For example, for A4, go to A4.9000; for A5, go to
A5.9000, and so on.
If no assembly causes a low resistance measurement,
you may have removed the defect in the disassembly
process or the problem may be intermittent. Go to
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A16.4930
Refer to the disassembly procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide to remove
the rear panel and disconnect ribbon cable W31 from the
motherboard. Measure the resistance of the +5 VAUp to
ground (XA16J1-76 to ground).
Is the resistance > 1 k
?
Go To A22.9000
1b-370 Troubleshooting Modules
Go To A19.9000
A16, A17, A18 Power Supply
A16.5000
1. Remove A16.
2. Check the +22 V plug-in style fuse. Replace the fuse
if required.
3. Reinstall A16.
Continue to the next step.
A16.5001
Is the A16 +22 V STBY LED on?
Go To A16.9000
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-371
A16.5002
Do the following:
1. Set the line power switch to standby.
2. Remove A16.
3. Connect the instrument to line power using an
isolation transformer.
4. Set the line power switch to on.
5. Measure the voltage of the +22 Vdc supply at
XA16J1-4 and 44.
Is the measured voltage between +23 and +55 Vdc with
less than 2 Vdc ripple?
Go To A17.9000
1b-372 Troubleshooting Modules
Continue
A16, A17, A18 Power Supply
A16.5003
Reinstall A16. Measure the voltage of the +22 Vdc
supply at XA16J1-4 and 44.
Is the measured voltage between +23 and +55 Vdc with
less than 2 Vdc ripple?
Continue
Go To A16.9000
A16.5004
The problem is most likely A16 (go to A16.9000).
However, some chance exists that A17 is unable to supply
sucient current. If replacing A16 does not solve the
problem, then replace A17 (go to A17.9000). Then go to
Troubleshooting Foldout, block 1.
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-373
A16.7000
The most probable fault is A16. However, some chance
exists that the supply in question could be loaded by an
assembly only when power is applied. If you suspect this
type of loading, continue with A16.7001; otherwise, go to
A16.9000.
A16.7001
The following is a general procedure. You will have to
adapt this procedure to your own situation. If you are
unsure how to proceed, or you have questions about
safety, do not continue with this procedure. Instead,
refer the instrument to qualied service personnel.
WARNING
When the instrument is connected to AC line power
or the A18 high voltage neon indicator is on, there
are voltages present that can cause personal injury
or death. Only trained, qualied personnel, who
are aware of the hazards involved, should perform
service on this instrument with its protective covers
removed. An isolation transformer must be used
during all these procedures.
Observe all safety practices. Remove all
jewelry/metal that can short to ground.
The power supply interconnect tables, located in \Special
Cases," are useful in determining where to make your
measurements.
Continue with A16.7002.
1b-374 Troubleshooting Modules
A16, A17, A18 Power Supply
A16.7002
1. Set the line power switch to standby.
2. Remove the following assemblies:
A4 fractional-N.
A5 YO phase detector.
A7 reference.
A8 modulation generator (Opt. 002).
A9 pulse.
A11 FM driver.
A12 multiplier/lter driver.
A13 YO driver.
A14 sweep generator.
A15 microprocessor.
3. Set the line power switch to on.
4. Measure the previously-failed voltage.
Continue
A16, A17, A18 Power Supply
Go To A16.7010
Troubleshooting Modules 1b-375
A16.7003
1. Set the line power switch to standby.
2. Replace all previously removed assemblies.
3. Remove A6.
Note
Be sure to disconnect the rigid cable connected to the
input of A6 before removing A6. Otherwise damage to
the cable, A6, and possibly the lter (FL2) can occur.
4. Set the line power switch to on.
5. Measure the previously-failed voltage.
Continue
Go To A6.9000
A16.7004
1. Set the line power switch to standby.
2. Replace A6.
3. Remove the RF deck. Refer to the disassembly and
replacement procedures in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept
CW Generator Service Guide as required.
4. Set the line power switch to on.
5. Measure the previously-failed voltage.
Continue
1b-376 Troubleshooting Modules
Go To A16.7020
A16, A17, A18 Power Supply
A16.7005
1.
2.
3.
4.
5.
6.
7.
8.
Set the line power switch to standby.
Disconnect the instrument from AC line power.
Replace the RF deck.
Remove the front panel assembly. Refer to the
disassembly and replacement procedures in the Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide as
required.
Disconnect all ribbon cables between the motherboard
and the front panel.
Reconnect the line power cord.
Set the line power switch to on.
Measure the previously-failed voltage.
Continue
A16, A17, A18 Power Supply
Go To A16.7030
Troubleshooting Modules 1b-377
A16.7006
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Reinstall the front panel.
WARNING
When the instrument is connected to AC line power
or the A18 high voltage neon indicator is on, there
are voltages present that can cause personal injury
or death. Only trained, qualied personnel, who
are aware of the hazards involved, should perform
service on this instrument with its protective covers
removed. An isolation transformer must be used
during all these procedures.
Observe all safety practices. Remove all
jewelry/metal that can short to ground.
5. Remove the rear panel. Refer to the disassembly and
replacement procedures in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept
CW Generator Service Guide as required.
6. Disconnect W31 (the ribbon cable connecting the rear
panel interface, A19, to the motherboard, A22).
7. Reinstall the rear panel with the ribbon cable still
disconnected.
8. Reconnect the instrument to AC line power.
9. Set the line power switch to on.
10. Measure the previously-failed voltage.
Continue
1b-378 Troubleshooting Modules
Go To A19.9000
A16, A17, A18 Power Supply
A16.7007
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Wait for all the indicators in the power supply section
to go out.
4. Remove the rear panel. Refer to the disassembly and
replacement procedures in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept
CW Generator Service Guide as required.
5. Reconnect the ribbon cable, W31, between the rear
panel interface, A19 and the motherboard, A22.
6. Reinstall the rear panel.
Go To A16.9000
A16.7010
1.
2.
3.
4.
Set the line power switch to standby.
Reinstall one of the previously removed assemblies.
Set the line power switch to on.
Remeasure the voltage. If the voltage now fails, the
assembly just installed is faulty. When the defective
assembly is identied, go to the 9000 paragraph for
that assembly for replacement instructions. For
example, for A4, go to A4.9000; for A5, go to A5.9000,
and so on.
5. Repeat this procedure until the problem has been
isolated or until no more assemblies exist.
If no more assemblies exist, go to \Special Cases".
A16, A17, A18 Power Supply
Troubleshooting Modules 1b-379
A16.7020
1. Lift the RF deck up into the service position. Refer
to the disassembly and replacement procedures in
the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service Guide
as required.
2. Set the line power switch to standby.
3. Remove all ribbon cables connecting the microcircuits
to the RF interface board (A20).
4. Set the line power switch to on.
5. Measure the previously-failed voltage.
Go To A20.9000
Continue
A16.7021
1. Lift the RF deck up into the service position. Refer
to the disassembly and replacement procedures in
the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service Guide
as required.
2. Set the line power switch to standby.
3. Select a microcircuit, attenuator, or other assembly on
the RF deck and reconnect the ribbon cable for that
assembly.
4. Set the line power switch to on.
5. Remeasure the voltage. If the voltage now fails, this
assembly is faulty.
6. Go to RF.xx90 where xx is the assembly number. For
example, if the assembly is A29, then go to RF.2990.
7. Repeat this procedure until the problem has been
isolated or until no more microcircuits exist.
If no more microcircuits exist, go to \Special Cases".
1b-380 Troubleshooting Modules
A16, A17, A18 Power Supply
A16.7030
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Reconnect only W2 (the ribbon cable connecting
the source module interface assembly, A2, to the
motherboard, A22).
4. Reconnect the instrument to AC line power.
5. Set the line power switch to on.
6. Measure the previously-failed voltage.
Go To A2.9000
Continue
A16.7031
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Reconnect W3 (the ribbon cable connecting the front
panel processor, A3, to the motherboard, A22).
4. Disconnect the ribbon cables connecting the front
panel processor (A3) to the display (A21) and the
keyboard (A1).
5. Reconnect the instrument to AC line power.
6. Set the line power switch to on.
7. Measure the previously-failed voltage.
Go To A3.9000
A16, A17, A18 Power Supply
Continue
Troubleshooting Modules 1b-381
A16.7032
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Reconnect W1 and W4 (the cables connecting the front
panel processor, A3, to the display, A21).
4. Reconnect the instrument to AC line power.
5. Set the line power switch to on.
6. Measure the previously-failed voltage.
Go To A21.9000
Continue
A16.7033
1. Set the line power switch to standby.
2. Disconnect the instrument from AC line power.
3. Reconnect W5 (the ribbon cable connecting the front
panel processor, A3, to the keyboard, A1).
4. Reconnect the instrument to AC line power.
5. Set the line power switch to on.
6. Measure the previously-failed voltage.
Go To A1.9000
Continue
A16.7034
The problem may be intermittent. Go to \Special Cases"
if you need additional assistance.
1b-382 Troubleshooting Modules
A16, A17, A18 Power Supply
A16.9000
A16, A17, A18 Power Supply
Replace the A16 assembly.
Troubleshooting Modules 1b-383
A17 Rectier/Filter Replacement
A17.000
A17.9000
1b-384 Troubleshooting Modules
If you think the problem with your instrument may
originate on the A17 assembly, go to \Instrument-Level
Troubleshooting."
Replace the A17 assembly and go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special
Cases" tab). A17 and A18 are never completely isolated.
If replacing A17 does not resolve your problem, try
replacing A18.
A17 Rectier/Filter
A18 Preregulator Replacement
A18.000
A18.9000
A18 Preregulator
If you think the problem with your instrument may
originate on the A18 assembly, go to \Instrument-Level
Troubleshooting."
Replace the A18 assembly and go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special
Cases" tab). A17 and A18 are never completely isolated.
If replacing A18 does not resolve your problem, try
replacing A17.
Troubleshooting Modules 1b-385
A19 Rear Panel Interface Troubleshooting
A19.000
1b-386 Troubleshooting Modules
Message Displayed on Synthesizer
Go to
Paragraph
A19 :
A19 :
A19 :
A19 :
A19.100
A19.200
A19.300
A19.9000
Control Latch
SMI Control Latch
SMI Sensing Circuit
Switched STD Supply
A19 Rear Panel Interface
A19.100
The A22J8 connector is located at the back of the
motherboard.
Go To A19.1300
A19 Rear Panel Interface
Continue
Troubleshooting Modules 1b-387
A19.101
Loop self-test #232:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42325 4ENTER5.
4. Select Loop Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A19.1305
1b-388 Troubleshooting Modules
Continue
A19 Rear Panel Interface
A19.102
Loop self-test #233:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42335 4ENTER5.
4. Select Loop Do Test #233 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A19.131
A19 Rear Panel Interface
Continue
Troubleshooting Modules 1b-389
A19.103
Loop self-test #231:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42315 4ENTER5.
4. Select Loop Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Signal
Location
AB0
AB1
AB4
AB5
AB6
A22J8-57
A22J8-58
A22J8-55
A22J8-56
A22J8-54
If one or more signals do not have TTL pulses, the test
has failed. If all signals have TTL pulses, the test has
passed.
Go To A19.1315
1b-390 Troubleshooting Modules
Go To A19.8000
A19 Rear Panel Interface
A19.200
Loop self-test #233:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42335 4ENTER5.
4. Select Loop Do Test #233 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Signal
Location
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
A22J8-52
A22J8-51
A22J8-50
A22J8-49
A22J8-48
A22J8-47
A22J8-46
A22J8-45
If one or more signals do not have TTL pulses, the test
has failed. If all signals have TTL pulses, the test has
passed.
Go To A19.1320
A19 Rear Panel Interface
Go To A19.8000
Troubleshooting Modules 1b-391
A19.300
Go To A19.1325
Continue
A19.301
Go To A19.1330
1b-392 Troubleshooting Modules
Go To A19.8000
A19 Rear Panel Interface
A19.1300
Go To A16.9000
Continue
A19.1301
There is an open on the motherboard between A22J8-42
and A16J-39, 40, 79, or 80. Verify this with an ohmmeter.
Is jumpering an acceptable repair?
Go To A22.9000
Continue
A19.1302
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A19 Rear Panel Interface
Troubleshooting Modules 1b-393
A19.1305
Go To A15.9000
Continue
A19.1306
There is an open on the motherboard between A22J8-60
and XA15J1-44. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A19.1307
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1b-394 Troubleshooting Modules
A19 Rear Panel Interface
A19.1310
Go To A15.9000
Continue
A19.1311
There is an open on the motherboard between A22J8-49
and XA15J1-53. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A19.1312
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A19 Rear Panel Interface
Troubleshooting Modules 1b-395
A19.1315
Check the following locations for TTL activity.
Signal
Location
AB0
AB1
AB4
AB5
AB6
XA15J1-7
XA15J1-47
XA15J1-9
XA15J1-49
XA15J1-10
If one or more signals do not have TTL pulses, the test
has failed. If all signals have TTL pulses, the test has
passed.
Go To A15.9000
Continue
A19.1316
There is an open on the motherboard between XA15J1
and A22J8. Verify this with an ohmmeter. Is jumpering
an acceptable repair?
Go To A22.9000
1b-396 Troubleshooting Modules
Continue
A19 Rear Panel Interface
A19.1317
Select the failing signals and install jumpers as required.
Signal
A19
Location
A15
Location
AB0
AB1
AB4
AB5
AB6
A22J8-57
A22J8-58
A22J8-55
A22J8-56
A22J8-54
XA15J1-7
XA15J1-47
XA15J1-9
XA15J1-49
XA15J1-10
After you repair the opens, go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
A19 Rear Panel Interface
Troubleshooting Modules 1b-397
A19.1320
Check all signals listed below for TTL pulses at XA15J1.
Signal
Location
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
XA15J1-12
XA15J1-52
XA15J1-13
XA15J1-53
XA15J1-14
XA15J1-54
XA15J1-15
XA15J1-55
If one or more signals do not have TTL pulses, the test
has failed. If all signals have TTL pulses, the test has
passed.
Go To A15.9000
Continue
A19.1321
There is an open on the motherboard data bus between
A22J8 and XA15J1. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
1b-398 Troubleshooting Modules
Continue
A19 Rear Panel Interface
A19.1322
Select the failing signals and install jumpers as required.
Signal
A19
Location
A15
Location
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
A22J8-52
A22J8-51
A22J8-50
A22J8-49
A22J8-48
A22J8-47
A22J8-46
A22J8-45
XA15J1-12
XA15J1-52
XA15J1-13
XA15J1-53
XA15J1-14
XA15J1-54
XA15J1-15
XA15J1-55
After you repair the opens, go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
A19.1325
Go To A16.9000
A19 Rear Panel Interface
Continue
Troubleshooting Modules 1b-399
A19.1326
There is an open on the motherboard between A22J8-4
and A16J1-30, 31, 70, or 71. Verify this with an
ohmmeter. Is jumpering an acceptable repair?
Go To A22.9000
Continue
A19.1327
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A19.1330
Go To A16.9000
1b-400 Troubleshooting Modules
Continue
A19 Rear Panel Interface
A19.1331
There is an open on the motherboard between A22J8-8
and A16J1-18, 19, 58, or 59. Verify this with an
ohmmeter. Is jumpering an acceptable repair?
Go To A22.9000
Continue
A19.1332
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A19 Rear Panel Interface
Troubleshooting Modules 1b-401
A19.8000
Perform the following:
1. Turn the synthesizer o.
2. Unplug the line power cord.
3. Remove the 8 screws that hold the rear panel.
4. Lower the rear panel (there is no need to disconnect it
completely).
5. Completely remove W31 (W31 connects A19 to the
motherboard).
6. Using an ohmmeter, check W31.
Is W31 Faulty?
Go To A19.9000
Continue
A19.8100
Replace W31. You may also want to replace A19. Then
go to the Troubleshooting Foldout, block 1 (located just
prior to the \Special Cases" tab).
1b-402 Troubleshooting Modules
A19 Rear Panel Interface
A19.9000
A19 Rear Panel Interface
Replace the A19 assembly.
Troubleshooting Modules 1b-403
A20 RF Interface Troubleshooting
A20.000
1b-404 Troubleshooting Modules
Message Displayed on Synthesizer
Go to
Paragraph
A20 : RF Interface +8V
A20.100
A20 RF Interface
A20.100
Perform the following voltage checks. If any
measurement fails, the test has failed. If all
measurements pass, the test has passed.
Name
+15VDC
015VDC
040VDC
+5VA
+5VD
+5VAUp
+8VDC
Limits
+14.7 to +15.5
014.5 to 015.6
039.4 to 040.6
+5.0 to +5.3
+5.0 to +5.3
TTL High
+7.75 to +8.25
Go To A20.120
A20 RF Interface
Location
XA20J1-24, 25, 59, 60
XA20J1-26, 61
XA20J1-27, 62
XA20J1-31, 32, 66, 67
XA20J1-13, 48
XA20J1-68
XA20J1-14, 15, 49, 50
Continue
Troubleshooting Modules 1b-405
A20.101
Perform the following setup:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42315 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #231 .
6. Check for TTL activity at the points listed in the
following table.
7. If any measurement fails, the test has failed. If all
measurements pass, the test has passed.
8. To exit the test, select Loop (asterisk o).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
Go To A20.125
1b-406 Troubleshooting Modules
Signal
Location
AB2
AB3
AB4
AB5
AB6
XA20J1-44
XA20J1-8
XA20J1-43
XA20J1-7
XA20J1-42
Continue
A20 RF Interface
A20.102
Perform the following:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42335 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #233 .
6. Check for TTL activity at the points listed in the
following table.
7. If any measurement fails, consider the test failed. If
all measurements pass, consider the test passed.
8. To exit the test, select Loop (asterisk o).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
Go To A20.130
A20 RF Interface
Signal
Location
DB0
DB1
DB2
DB3
DB4
DB5
XA20J1-5
XA20J1-39
XA20J1-4
XA20J1-38
XA20J1-3
XA20J1-37
Continue
Troubleshooting Modules 1b-407
A20.103
Perform the following setup:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42325 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #232 .
6. After making the following measurement, to exit the
test, select Loop (asterisk o).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
Go To A20.135
1b-408 Troubleshooting Modules
Continue
A20 RF Interface
A20.104
Perform the following setup:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42555 4ENTER5.
4. Select Log (asterisk on).
5. Select Output Menu When to Log Always (asterisk
on).
6. Press 4PRIOR5.
7. Select Do Test #255 .
8. After making the following measurement, to exit the
test, select Loop (asterisk o).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
Continue
A20 RF Interface
Go To A20.140
Troubleshooting Modules 1b-409
A20.105
Following the disassembly and replacement procedures
in the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service Guide,
lift the RF deck up into the service position. Check
the ribbon cable that connects the YO (A26) to the RF
interface board (A20). If it is loose, then reseat the cable.
Correct any other obvious faults.
Perform the following test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42665 4ENTER5.
4. Select Do Test #266 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
If the test fails, go to RF.2690. Otherwise, go to the
Troubleshooting Foldout, block 1, (located just prior to
the \Special Cases" tab).
1b-410 Troubleshooting Modules
A20 RF Interface
A20.120
There is an open on the motherboard between the RF
interface board (A20) and the post-regulator (A16).
Consult the following table to determine the exact
location of the open. Verify this with an ohmmeter.
Name
A16 Post Regulator
A20 RF
Interface Board
+15VDC
015VDC
040VDC
+5VA
+5VD
+5VAUp
+8VDC
XA16J1-30, 31, 70, 71
XA16J1-25, 26, 65, 66
XA16J1-22, 62
XA16J1-13, 14, 53, 54
XA16J1-39, 40, 79, 80
XA16J1-76
XA16J1-6, 7, 8, 46, 47, 48
XA20J1-24, 25, 59, 60
XA20J1-26, 61
XA20J1-27, 62
XA20J1-31, 32, 66, 67
XA20J1-13, 48
XA20J1-68
XA20J1-14, 15, 49, 50
Is jumpering the open an acceptable repair?
Go To A22.9000
Continue
A20.121
Install a jumper. Then go to the Troubleshooting Foldout,
block 1, (located just prior to the \Special Cases" tab).
A20 RF Interface
Troubleshooting Modules 1b-411
A20.125
There is an open on the motherboard between the RF
interface board (A20) and the processor (A15). Consult
the following table to determine the exact location of the
open. Verify this with an ohmmeter.
Name
AB2
AB3
AB4
AB5
AB6
A15
Processor
A20 RF
Interface Board
XA15J1-8
XA15J1-48
XA15J1-9
XA15J1-49
XA15J1-10
XA20J1-44
XA20J1-8
XA20J1-43
XA20J1-7
XA20J1-42
Is jumpering the open an acceptable repair?
Go To A22.9000
Continue
A20.126
Install a jumper. Then go to the Troubleshooting Foldout,
block 1, (located just prior to the \Special Cases" tab).
1b-412 Troubleshooting Modules
A20 RF Interface
A20.130
There is an open on the motherboard between the RF
interface board (A20) and the processor (A15). Consult
the following table to determine the exact location of the
open.
Name
DB0
DB1
DB2
DB3
DB4
DB5
A15
Processor
A20 RF
Interface Board
XA15J1-12
XA15J1-52
XA15J1-13
XA15J1-53
XA15J1-14
XA15J1-54
XA20J1-5
XA20J1-39
XA20J1-4
XA20J1-38
XA20J1-3
XA20J1-37
Is jumpering the open an acceptable repair?
Go To A22.9000
Continue
A20.131
Install a jumper. Then go to the Troubleshooting Foldout,
block 1, (located just prior to the \Special Cases" tab).
A20 RF Interface
Troubleshooting Modules 1b-413
A20.135
Continue
Go To A15.9000
A20.136
There is an open on the motherboard between XA20J1-57
and XA15J1-41. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A20.137
Install a jumper. Then go to the Troubleshooting Foldout,
block 1, (located just prior to the \Special Cases" tab).
1b-414 Troubleshooting Modules
A20 RF Interface
A20.140
Continue
Go To A15.9000
A20.141
There is an open on the motherboard between XA20J1-33
and XA15J2-59. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
Continue
A20.142
Install a jumper. Then go to the Troubleshooting Foldout,
block 1, (located just prior to the \Special Cases" tab).
A20 RF Interface
Troubleshooting Modules 1b-415
A20.9000
1b-416 Troubleshooting Modules
Replace the A20 assembly.
A20 RF Interface
A21 Display Troubleshooting
A21.000
When the full self-tests are run (from the service menu),
the display test is not run. Only the display to A3
interface is tested. To test the display, run the following
test.
Perform the following key sequence:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42575 4ENTER5.
4. Select Do Test #257 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
You will see a fast-moving cursor moving from side to
side and line to line, and a walking character set on each
line. In this way you can check each segment and the
display's logic in presenting the characters.
To exit the test, press 4PRESET5.
Note
A21 Display
If the message POWER SUPPLY FAILURE or CHECK
INSTRUMENT appears on the display, this is a sign that the
front panel processor (A3) was not able to communicate
with the main processor (A15). In this case, the display is
not at fault. Go to ILT.000.
Troubleshooting Modules 1b-417
A21.9000
1b-418 Troubleshooting Modules
Replace the A21 assembly.
A21 Display
A22 Motherboard Replacement
A22 Motherboard
A22.000
There are no motherboard-specic self-tests. If you think
the problem with your instrument may originate on the
A22 assembly, go to \Instrument-Level Troubleshooting."
A22.9000
If you suspect an open trace, verify it with an ohmmeter
before replacing A22.
To replace the motherboard assembly, see \Disassembly
and Replacement Procedures" in the Agilent Technologies
8360 B-Series Swept Signal Generator/L-Series Swept CW
Generator Service Guide. Then go to the Troubleshooting
Foldout, block 1 (located just prior to the \Special Cases"
tab).
Troubleshooting Modules 1b-419
A23 10 MHz Reference Replacement
A23.000
1b-420 Troubleshooting Modules
The 10 MHz reference standard is shipped with a cable
(W30). When replacing the reference standard, verify
that this cable is correct. If necessary, remove this cable
and solder cable W30 from your old reference standard in
its place. The disassembly and replacement procedures
show this cable.
Go to A23.9000 for A23 replacement.
A23 10 MHz Reference
A23.9000
A23 10 MHz Reference
Replace the A23 assembly.
Troubleshooting Modules 1b-421
1c
RF and System Troubleshooting
This chapter contains the following two sections. The
page number of each section is also listed.
RF Troubleshooting : : : : : : : : : : : : : : : : : : : : : : : : 1c-2
System Troubleshooting : : : : : : : : : : : : : : : : : : 1c-24
A23 10 MHz Reference
RF and System Troubleshooting
1c-1
RF Troubleshooting
RF.000
1c-2 RF and System Troubleshooting
Message Displayed on Synthesizer
Go to
Paragraph
RF : YO Amplier Bias
RF : LOBAND Tuning Voltage
RF : LOBAND Locked Check
RF : Dual Modulator
RF : Amp/Multiplier
RF : Amp/Filter
RF : Amplier/Switch
RF : LOBAND Output Level
RF : Mod{Split Prelevel Det
RF : Amplier/Detector
RF : Doubler
RF : Option 006 Pulse
RF.100
RF.200
RF.300
RF.400
RF.500
RF.600
RF.700
RF.800
RF.900
RF.900
RF.900
RF.900
A23 10 MHz Reference
RF.100
Following the disassembly and replacement procedures
in the Service manual, lift the RF deck into the service
position. Check the ribbon cable that connects the YO
(A26) to the RF interface board (A20). If it is loose, then
reseat the cable. Correct any other obvious faults.
Perform the following test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42665 4ENTER5.
4. Select Do Test #266 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
If the test fails, go to RF.2690. Otherwise, go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A23 10 MHz Reference
RF and System Troubleshooting
1c-3
RF.200
Go To A7.9000
Continue
RF.201
Continue
1c-4 RF and System Troubleshooting
Go To RF.203
A23 10 MHz Reference
RF.202
Replace W20 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
RF.203
Using the disassembly and replacement procedures in
the Service manual, lift the RF deck into the service
position. Check the ribbon cable that connects the
low band assembly (A24) to the RF interface board
(A20). If it is loose, reseat the cable. Correct any other
obvious physical faults. Reassemble the RF deck into the
instrument.
Perform the following test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42685 4ENTER5.
4. Select Do Test #268 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To RF.2490
RF.204
A23 10 MHz Reference
Continue
The failure appears to be corrected. Go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
RF and System Troubleshooting
1c-5
RF.300
Perform the following test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42695 4ENTER5.
4. Select Loop (asterisk on).
5. Select Do Test #269 .
6. After making the following measurement, to exit the
test, select Loop (asterisk o).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
Continue
RF.301
1c-6 RF and System Troubleshooting
Go To RF.305
A20 is the most likely failure. However, some chance
exists that the low band microcircuit was unable to drive
the out-of-lock circuitry to its limits. Replace A20 (go to
A20.9000), then retest. If you get the same failure again,
replace the low band microcircuit (go to RF.2490).
A23 10 MHz Reference
RF.305
Continue
RF.306
There is an open on the motherboard between XA20J1-55
and XA15J1-80. Verify this with an ohmmeter. Is
jumpering the open an acceptable repair?
Go To A22.9000
RF.307
A23 10 MHz Reference
Go To A15.9000
Continue
Install a jumper. Then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
RF and System Troubleshooting
1c-7
RF.400
Using the disassembly and replacement procedures, lift
the RF deck into the service position.
For instruments with Option 006 installed:
Check the ribbon cable that connects the AM
modulator (A38) to the RF interface board (A20).
Check the exible coaxial cable that connects the AM
modulator to the motherboard (A22).
If any cables are loose, reseat them. Correct any obvious
faults.
If all cable connections are good, replace the A38 AM
modulator (RF.3890).
For instruments without Option 006 installed:
Check the ribbon cable that connects the dual
modulator (A38) to the RF interface board (A20).
Check the exible coaxial cables that connect the dual
modulator to the ALC (A10) and to the motherboard
(A22).
If any cables are loose, reseat them. Correct any obvious
faults.
Perform the following test and log the results to the
display:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42775 4ENTER5.
4. Select Output Menu When to Log Always (asterisk
on).
5. Select PRIOR , then select Log (asterisk on).
6. Select Do Test #277 .
7. Note the result of each measurement in the test.
Select Cont to go on to the next measurement until
the test is complete.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
1c-8 RF and System Troubleshooting
A23 10 MHz Reference
If all the measurements are within specications, the
test passes. Go to the Troubleshooting Foldout, block 1
(located just prior to the \Special Cases" tab).
If only the \Detector Output" test fails, go to RF.401. If
any other measurement fails, go to RF.3890.
RF.401
1. Press 4PRESET5.
2. Press 4CW5 455 4GHz5 4POWER LEVEL5 4255 4dBm5.
Continue
A23 10 MHz Reference
Go To A10.9000
RF and System Troubleshooting
1c-9
RF.402
Continue
1c-10 RF and System Troubleshooting
Go To RF.405
A23 10 MHz Reference
RF.403
Set up for power measurement:
1. Set the line power switch to standby.
2. Remove W56 (the cable that connects the
amp/multiplier, A28, to the dual modulator, A38).
3. Set the line power switch to on.
4. Press 4PRESET5 4CW5 455 4GHz5.
Continue
A23 10 MHz Reference
Go To RF.3890
RF and System Troubleshooting 1c-11
RF.404
Set up for power measurement:
1. Set the line power switch to standby.
2. Remove W49 (the cable that connects the diode
switch, A41, to the amp/multiplier, A28).
3. Set the line power switch to on.
4. Press 4PRESET5 4CW5 455 4GHz5.
5. Make sure power is > 6 dBm.
Set up for frequency measurement:
1. Press 455 4GHz5.
2. The measured frequency should be 5 GHz plus and
minus the frequency counter accuracy.
Go To RF.4190
RF.405
Go To RF.2890
Replace W22 (the cable that connects the dual modulator
detector output to the A10 assembly) and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
1c-12 RF and System Troubleshooting
A23 10 MHz Reference
RF.500
Using the disassembly and replacement procedures, lift
the RF deck into the service position. Check the ribbon
cable that connects the amp/multiplier (A28) to the RF
interface board (A20). If it is loose, reseat the cable.
Correct any other obvious physical faults.
Perform the following test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42755 4ENTER5.
4. Select Do Test #275 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
If the test fails, go to RF.2890. Otherwise, go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A23 10 MHz Reference
RF and System Troubleshooting 1c-13
RF.600
Using the disassembly and replacement procedures,
lift the RF deck into the service position. Check the
ribbon cable that connects the amp/lter (A29) to the
RF interface board (A20). If it is loose, reseat the cable.
Correct any other obvious physical faults.
Perform the following test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42765 4ENTER5.
4. Select Do Test #276 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
If the test fails, go to RF.2990. Otherwise, go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
1c-14 RF and System Troubleshooting
A23 10 MHz Reference
RF.700
Using the disassembly and replacement procedures, lift
the RF deck into the service position. Check the ribbon
cable that connects the amp/switch (A33) to the RF
interface board (A20). If it is loose, reseat the cable.
Correct any other obvious physical faults.
Perform the following test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42715 4ENTER5.
4. Select Do Test #271 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
If the test fails, go to RF.3390. Otherwise, go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A23 10 MHz Reference
RF and System Troubleshooting 1c-15
RF.800
Using the disassembly and replacement procedures, lift
the RF deck into the service position. Check the ribbon
cable that connects the low band assembly, A24, to the
RF interface board, A20. If it is loose, reseat the cable.
Correct any other obvious physical faults.
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42705 4ENTER5.
4. Select Do Test #270 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
RF.801
Go To RF.805
Do the following:
1. Set the line power switch to standby.
2. Disconnect W50 from A41.
3. Set the line power switch to on.
4. Press 4PRESET5 4SERVICE5.
5. Select Tools Menu ViewHdwr Menu YO Freq/Harm .
6. Press 4CW5 4105 4MHz5.
Use the RPG knob to vary the CW frequency over a range
of 10 MHz to 1.99 GHz.
Measure the power and frequency over this range as
shown in the following gure.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1c-16 RF and System Troubleshooting
A23 10 MHz Reference
Go To RF.4190
RF.802
Press 4PRESET5 4CW5.
Measure the DC voltage at 100 MHz, 500 MHz, 1 GHz, and
2 GHz.
Continue
A23 10 MHz Reference
Continue
Go To A10.9000
RF and System Troubleshooting 1c-17
RF.803
Measure the DC voltage at 100 MHz, 500 MHz, 1 GHz, and
2 GHz.
Go To RF.2490
RF.804
Continue
Replace W24 and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
1c-18 RF and System Troubleshooting
A23 10 MHz Reference
RF.900
A23 10 MHz Reference
These self-tests apply to instruments of an earlier
vintage than documented in this manual. Refer to the
Assembly-Level Repair manual (part number 08360-90060)
for troubleshooting.
RF and System Troubleshooting 1c-19
Microcircuit Assembly Replacement
RF.2490
The low band assembly (A24) is the most-likely failure.
There is a small chance that A20 has failed.
Has the low band assembly (A24) been replaced?
Continue
Go To A20.9000
RF.2491
Following the disassembly and replacement procedures
in the Service manual, replace the low band assembly
(A24). Then perform the appropriate adjustments and
performance tests and restart troubleshooting.
RF.2690
The YO (A26) is the most-likely failure. However, there is
a small chance that the failure is A20.
Has the YO (A26) been replaced?
Continue
RF.2691
Go To A20.9000
Following the disassembly and replacement procedures in
the Service manual, replace the YO (A26). Then perform
the appropriate adjustments and performance tests and
restart troubleshooting.
1c-20 RF and System Troubleshooting
A23 10 MHz Reference
RF.2890
The amp/multiplier (A28) is the most-likely failure.
However, there is a small chance that the failure is A20.
Has the amp/multiplier (A28) been replaced?
Continue
Go To A20.9000
RF.2891
Following the disassembly and replacement procedures
in the Service manual, replace the amp/multiplier
(A28). Then perform the appropriate adjustments and
performance tests and restart troubleshooting.
RF.2990
The amp/lter (A29) is the most-likely failure. However,
there is a small chance that the failure is A20 (the RF
interface assembly) or W57 (the cable that connects A29,
the amp/lter, to A38, the dual modulator).
Has the amp/lter (A29) been replaced?
Continue
Go To A20.9000
RF.2991
Following the disassembly and replacement procedures in
the Service manual, replace the amp/lter (A29). Then
perform the appropriate adjustments and performance
tests and restart troubleshooting.
RF.3090
If you have an HP/Agilent 83620B/22B/30B/40B/50B or
an HP/Agilent 83630L/40L/50L, the A30 bridge detector
has failed. Replace it and perform the appropriate
adjustments and performance tests. If you have an
HP/Agilent 83623B/24B and 83623L, the detector, (CR1,
part of A30) has failed. Replace it and its bias board
A23 10 MHz Reference
RF and System Troubleshooting 1c-21
together. The directional coupler rarely fails, however
replace it at this time also only if it has failed.
RF.3190
The most likely failure is the step attenuator, A31.
However, it is possible that the RF interface assembly,
A20, or the ribbon cable connecting A31 to A20, W40,
has failed. Replace the step attenuator using the
disassembly and replacement procedures in the Service
manual. Perform the appropriate adjustments and restart
troubleshooting.
RF.3290
Replace the amp/doubler, A32, using the disassembly and
replacement procedures in the Service manual. Perform
the appropriate adjustments and restart troubleshooting.
RF.3390
Replace the amp/switch, A33, using the disassembly and
replacement procedures in the Service manual. Perform
the appropriate adjustments and restart troubleshooting.
RF.3890
Replace the dual modulator (or the AM modulator for
instruments with Option 006), A38, using the disassembly
and replacement procedures in the Service manual.
Perform the appropriate adjustments and restart
troubleshooting.
RF.3990
Replace the directional coupler, A39, using the
disassembly and replacement procedures in the Service
manual. Perform the appropriate adjustments and restart
troubleshooting.
RF.4090
Replace the DC block, A40, using the disassembly and
replacement procedures in the Service manual. Perform
the appropriate adjustments and restart troubleshooting.
1c-22 RF and System Troubleshooting
A23 10 MHz Reference
RF.4190
Replace the diode switch, A41, using the disassembly and
replacement procedures in the Service manual. Perform
the appropriate adjustments and restart troubleshooting.
RF.4290
Replace the pulse modulation switched lter, A42, using
the disassembly and replacement procedures in the
Service manual. Perform the appropriate adjustments and
restart troubleshooting.
A23 10 MHz Reference
RF and System Troubleshooting 1c-23
System Troubleshooting
SYS.000
Message Displayed on Synthesizer
Go to
Paragraph
SYS : YO Loop Locking
SYS : LBAND Modulators
SYS : LBAND Leveling
SYS : HBAND Modulators
SYS : HBAND Leveling
SYS : YTM Tracking
SYS : YTM Biasing
SYS.100
SYS.200
SYS.300
SYS.400
SYS.500
SYS.600
SYS.700
1c-24 RF and System Troubleshooting
A23 10 MHz Reference
SYS.100
Perform the following setup:
1. Press 4PRESET5 SYSTEM 4MENU5.
2. Select Security Menu Clear Memory .
3. Press 415 4ENTER5.
4. Press 4SERVICE5.
5. Select Selftest Menu .
6. Press 42825 4ENTER5.
7. Select Do Test #282 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
If the test fails, go to SYS.101. Otherwise, go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
A23 10 MHz Reference
RF and System Troubleshooting 1c-25
SYS.101
Perform the following:
1. Set the line power switch to standby.
2. Disconnect W14 from A5J3.
3. Set the line power switch to on.
4. Press 4PRESET5 4START5 435 4GHz5 4STOP5 475 4GHz5.
5. Press 4SWEEP TIME5 4155 4msec5. (Ignore the UNLOCK
message.)
6. Set the oscilloscope as follows:
Trigger on negative edge.
Sweep time 15 ms.
7. Compare the waveform on the oscilloscope to the one
shown. Ignore the amplitude of the pulses. Look for
A5 sweeping to lock.
8. Reconnect W14 to A5J3.
Go To A5.9000
1c-26 RF and System Troubleshooting
Continue
A23 10 MHz Reference
SYS.102
Perform the following setup:
1. Set the line power switch to standby.
2. Disconnect W14 from the YO (A26J2). Ensure that the
cable does not short out anything else.
3. Set the line power switch to on.
4. Press 4PRESET5 4START5 435 4GHz5 4STOP5 475 4GHz5.
5. Press 4SWEEP TIME5 4155 4msec5. (Ignore the UNLOCK
message.)
6. Set the oscilloscope as follows:
Trigger on negative edge.
Sweep time 10 ms.
7. Compare the waveform on the oscilloscope to the one
shown. Ignore the amplitude of the pulses. Look for
A5 sweeping to lock.
8. Reconnect W14 to A26J2.
Go To SYS.120
A23 10 MHz Reference
Continue
RF and System Troubleshooting 1c-27
SYS.104
Perform the following setup:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42825 4ENTER5.
4. Select Log (asterisk on).
5. Select Output Menu When to Log Always (asterisk
on).
6. Press 4PRIOR5.
7. Select Do Test #282 .
8. Note the data points that fail and select CONT until
the test is complete.
The \YO Driver Gain and Linearity" adjustment is the
most likely cause of failure of the previous test. Other
YO-related adjustments can also be contributing to the
failures.
If the adjustments don't resolve the failure, or if you
have good reason to suspect another assembly rather
than the adjustments, use the following table. The table,
used with the pass/fail data obtained from the previous
test, indicates which assembly is the most likely cause of
failure. Each paragraph indicates several possible causes
of failure in order of most probable cause listed rst.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
Data Point Failures
2.303 GHz only
5.7499 GHz only
6.8009 GHz only
7.4 GHz only
Switching Test only
2.303 GHz and 6.8009 GHz only
All Other Combinations
1c-28 RF and System Troubleshooting
Go To
Paragraph
SYS.105
SYS.106
SYS.106
SYS.107
SYS.108
SYS.109
SYS.110
A23 10 MHz Reference
SYS.105
1.
2.
3.
4.
SYS.106
1. Sampler adjustments.
2. Sampler (A6).
3. YO (A26).
SYS.107
1. YO adjustments.
2. RF path from the directional coupler (A39) to the
sampler (A6). This path includes FL2, W51, and AT3.
3. YO (A26).
4. YO driver (A13).
SYS.108
1. YO phase detector (A5).
2. YO driver (A13).
3. YO (A26).
SYS.109
1. Sampler (A6).
2. Sampler adjustments.
SYS.110
Using the troubleshooting block diagram located at the
end of \Special Cases", examine the YO loop for the
cause of failure:
1. RF path from the directional coupler (A39), FL2, W51,
and AT3 to the sampler (A6).
2. YO, sampler, and YO phase detector adjustments.
3. Sampler or YO (A26).
4. YO phase detector (A5) or YO driver (A13).
SYS.120
Replace W14. Then go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A23 10 MHz Reference
YO adjustments.
Sampler adjustments.
Sampler (A6).
YO (A26).
RF and System Troubleshooting 1c-29
SYS.200
1. Check W33 (A22J4 to A24J6) for poor connection or
damage.
2. Reseat the pulse assembly (A9).
3. Replace the pulse assembly (A9) or the low band
microcircuit (A24).
1c-30 RF and System Troubleshooting
A23 10 MHz Reference
SYS.300
A23 10 MHz Reference
1. Check all cabling and connections associated with the
ALC (A10) and low band (A24) assemblies.
2. Perform the low band (A24) and ALC (A10)
adjustments.
RF and System Troubleshooting 1c-31
SYS.400
1. Check W32 for poor connection or for damage. (W32
connects A22J3 to A38J3 or it connects A22J3 to
A42J3 in instruments with Option 006.)
2. Reseat the pulse board (A9).
3. Replace either the pulse board (A9) or the dual
modulator microcircuit (A38). In instruments with
Option 006, replace either the pulse board (A9) or the
pulse modulation switched lter (A42).
1c-32 RF and System Troubleshooting
A23 10 MHz Reference
SYS.500
A23 10 MHz Reference
1. Check all cabling and connections associated with A10
(the ALC assembly) and A38 (the dual modulator or, in
instruments with Option 006, the AM modulator).
2. Perform the \Modulator Oset and Gain" and ALC
adjustments.
3. Replace the dual modulator if it has not already been
replaced. For instruments with Option 006, replace
the AM modulator if it has not already been replaced.
4. Replace the RF interface (A20).
5. Replace the ALC assembly (A10).
RF and System Troubleshooting 1c-33
SYS.600
Perform the following setup:
1. Set the line power switch to on.
2. Press 4CW5 445 4GHz5 4ALC5 Leveling Mode ALCoff .
3. Press 4USER CAL5 Tracking Menu Peak RF Once .
4. Press 4POWER LEVEL5 and adjust the synthesizer rotary
knob for a +5 dBm RF output as measured by the
power meter.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
SYS.601
Go To SYS.640
Instrument Description
Go To
Paragraph
83640B/L or 83650B/L (Frequency doubler)
8360 B-Series Option 006 (Fast pulse, no frequency doubler)
83623B or 83624B (High power not Option 006)
83623L (High power)
83620B or 83622B (Not Option 006)
83630B/L (Not Option 006)
1c-34 RF and System Troubleshooting
SYS.602
SYS.610
SYS.620
RF.2990
SYS.690
SYS.690
A23 10 MHz Reference
SYS.602
Perform the following:
1. Connect the power meter to the doubler's output
A32J4.
2. Press 4CW5 445 4GHz5 4ALC5 Leveling Mode ALCoff .
3. Press 4POWER LEVEL5 and adjust the synthesizer rotary
knob for a +5 dBm RF output as measured by the
power meter.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
SYS.603
Is Option 006 installed?
Go To SYS.690
A23 10 MHz Reference
Go To SYS.636
Continue
RF and System Troubleshooting 1c-35
SYS.610
Perform the following:
1. Connect the power meter to the output of the pulse
modulation switched lter, A42J6.
2. Press 4CW5 445 4GHz5 4ALC5 Leveling Mode ALCoff .
3. Press 4POWER LEVEL5 and adjust the synthesizer rotary
knob for a +5 dBm RF output as measured by the
power meter.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To SYS.690
SYS.611
Continue
Is the instrument an 83640B/L or 83650B/L?
Go To SYS.636
1c-36 RF and System Troubleshooting
Go To RF.3290
A23 10 MHz Reference
SYS.620
Perform the following:
1. Connect the power meter to the amplier's output
A33J4.
2. Press 4CW5 445 4GHz5 4ALC5 Leveling Mode ALCoff .
3. Press 4POWER LEVEL5 and adjust the synthesizer rotary
knob for a +5 dBm RF output as measured by the
power meter.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To SYS.690
Go To SYS.635
SYS.635
The problem is either the input cable to the coupler
(W45) or the coupler (A30). Visually inspect the
cable and the coupler. Especially check for damaged
connectors. Replace the damaged component (if in doubt,
replace the cable rst).
SYS.636
The problem is either the input cable to the bridge
detector (W45) or the bridge detector (A30). Visually
inspect the cable and the bridge detector. Especially
check for damaged connectors. Replace the damaged
component (if in doubt, replace the cable rst).
A23 10 MHz Reference
RF and System Troubleshooting 1c-37
SYS.640
Disconnect W25 from A10J7. Measure the detector
voltage at the output of the cable and adjust the
synthesizer power level for 050 mV.
Continue
SYS.641
Go To A10.9000
On all models except the 83623B/24B and 83623L,
disconnect W25 from the bridge detector. On the
83623B/24B and 83623L, disconnect W25 from CR1.
Measure the detector voltage at the output of the
detector and adjust the synthesizer power level for
050 mV.
Continue
1c-38 RF and System Troubleshooting
Go To SYS.643
A23 10 MHz Reference
SYS.642
For all models except the 83623B/24B and 83623L, the
problem is most likely the bridge detector A30. Replace
A30.
For the 83623B/24B and 83623L, the problem is most
likely the detector (CR1). Replace CR1. If that does not
x the problem, replace the coupler (A30).
SYS.643
Replace W25.
SYS.690
Perform the following:
1. Connect the power meter to the amp/lter output
A29J3.
2. Press 4CW5 445 4GHz5 4ALC5 Leveling Mode ALCoff .
3. Press 4POWER LEVEL5 and adjust the synthesizer rotary
knob for a +4 dBm RF output as measured by the
power meter.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Continue
A23 10 MHz Reference
Go To SYS.692
RF and System Troubleshooting 1c-39
SYS.691
Perform the following:
1. Connect the power meter to the dual modulator
output A38J16. In instruments with Option 006,
connect the power meter to the output of the AM
modulator, A38J9.
2. Press 4CW5 445 4GHz5 4ALC5 Leveling Mode ALCoff .
3. Press 4POWER LEVEL5 and adjust the synthesizer rotary
knob for a +3 dBm RF output as measured by the
power meter.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To RF.3890
SYS.692
Go To RF.2990
Instrument Description
Go To
Paragraph
83640B/L or 83650B/L (Frequency Doubler not Option 006)
8360 B-Series Option 006 (Fast Pulse)
83623B or 83624B (High Power not Option 006)
83620B or 83622B (Not Option 006)
83630B/L (Not Option 006)
1c-40 RF and System Troubleshooting
RF.3290
RF.4290
RF.3390
RF.3090
RF.3090
A23 10 MHz Reference
SYS.700
1. If rmware has been replaced recently, delete all
self-test patches. Press 4SERVICE5 Adjust Menu
TestPatch Menu . Select Delete Patch until the
patch list is empty.
2. Check the cabling associated with the amp/multiplier
(A28).
3. Replace the amp/multiplier (go to RF.2890).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
A23 10 MHz Reference
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
RF and System Troubleshooting 1c-41
1c-42 RF and System Troubleshooting
A23 10 MHz Reference
1. After Replacement or Repair
Run Instrument-Level Self-Tests
Did a
self-test
fail?
Do applicable
performance test(s)
(refer to table 8-1
in the Service Guide)
No
Yes
Is
this failure
the same as
the original
failure?
No
Go to
"Special Cases."
Paragraph SC.000
Yes
Follow the instructions
displayed on the synthesizer.
2. After Adjustment Only
Run Instrument-Level Self-Tests
Did a
self-test
fail?
You are through
Troubleshooting.
No
Yes
Is
this failure
the same as
the original
failure?
No
Follow the
instructions
displayed on
the synthesizer.
Yes
Go to paragraph
AX.9000
fo731
Troubleshooting
Foldout
1d
Special Cases
A23 10 MHz Reference
Special Cases 1d-1
SC.000 Introduction
1d-2 Special Cases
If you have not used the \Instrument Level
Troubleshooting" section yet, go to ILT.000 before
continuing with \Special Cases". The \Instrument Level
Troubleshooting" section contains help with hard failures,
performance test and adjustment failures, as well as some
system failures.
\Special Cases" is not a step-by-step process. It is a
collection of routines, techniques, and information
describing the block diagram. It deals with failures and
situations not covered in the previous troubleshooting
sections. This information is intended to be used with
the overall block diagram at the end of this section. In
using this section you will be required to select and
develop your own testing processes and make your own
judgments in analyzing the results of your tests.
A23 10 MHz Reference
SC.100 Safety Considerations
Warning
When the instrument is connected to ac line power
or the A18 high voltage neon indicator is on, there
are voltages present that can cause personal injury
or death. Only trained, qualied personnel, who
are aware of the hazards involved, should perform
service on this instrument with its protective covers
removed. An isolation transformer must be used
during all power supply troubleshooting procedures.
Observe all safety practices. Remove all
jewelry/metal that can short to ground.
Line power is located at the rear of the instrument under
the red plastic protective cover. However, dangerous
voltages exist outside this area especially in the covered
power supply section and the cable harnesses located at
the rear of the instrument. Before removing the power
supply cover, servicing any of the cables or harnesses,
or working in the proximity of these parts, completely
disconnect line power and wait for all power supply
indicators to go o. Follow this procedure anytime
you install or remove assemblies or parts or otherwise
physically service the instrument.
If your instrument does not have a red, plastic WARNING
cover at the bottom rear of the motherboard, install one
before continuing. Completely disconnect line power
before doing any servicing with the warning cover
removed or damaged. Also, completely disconnect line
power before installing or removing the warning cover.
A23 10 MHz Reference
Special Cases 1d-3
SC.200 Classify Your Failure
Classify your failure using the following denitions:
Failure
System
Repeatable
Detected
1d-4 Special Cases
Denition
The failure has only been demonstrated
as a part of a system (a collection of
instruments). In general, the failure
cannot be repeated or characterized
without a system present.
The failure occurs each and every time
a particular circumstance or sequence
of events occurs. (The opposite of
repeatable is intermittent.)
The failure is reported by the rmware
diagnostics. If a failure is reported after
running the full self-tests, then the
failure is detected regardless of whether
or not the failure has been isolated.
(Don't use \Special Cases" unless
\Instrument Level Troubleshooting" did
not isolate the failure.)
A23 10 MHz Reference
After you have classied your failure, use this table to
determine which techniques to use to isolate your failure.
System
FAILURE
Repeatable
PARAGRAPHS
Detected
No
No
No
SC.210
SC.250
SC.230
SC.220
No
No
Yes
SC.210
SC.250
SC.230
No
Yes
No
SC.220
SC.230
SC.250
No
Yes
Yes
SC.220
SC.250
SC.230
Yes
Yes or No
Yes or No
SC.240
As an example, if an instrument has an intermittent loss
of RF power out the front panel (maybe it fails once
a day) that hasn't been detected by the diagnostics,
you would use the techniques explained in paragraphs
SC.210, SC.250, SC.230 and SC.220. This is because it is a
nonsystem failure, nonrepeatable (intermittent) failure,
and undetected by the diagnostics.
A23 10 MHz Reference
Special Cases 1d-5
SC.210 Looping and Logging
The service looping and logging techniques can be used
to localize an intermittent failure. Looping repeatedly
cycles the instrument through a series of states or tests.
Logging reports any detected failures. These techniques
work well with temperature cycling. Other techniques
that may be useful are frequency list mode and alternate
registers. The list mode and alternate registers lack a
logging feature but they can be used to exercise the
instrument in a customized fashion without the use of an
external controller or computer.
How to Loop and Log a Diagnostic Test
You may loop on the full self-tests (test #0), a group of
tests (for example test #47 tests the A5 assembly), or on
a single test. The following example loops on a single
diagnostic test:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4515 4ENTER5. This is the \IF Frequency Counter"
test.
4. Select Loop (asterisk on).
5. Select Do Test #51 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
The instrument will continuously repeat test #51. Each
time the test is completed the Number of PASSES or
Number of FAILS is updated on the display. The selftest
menu will be updated with the results of the last test.
(This can be useful in determining how often a failure
occurs.)
Continue with the following:
6. Select Loop (asterisk o). The looping should stop.
7. Select Do Test #51 .
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Notice that the test is run once and the pass/fail status
in the selftest menu is updated. Continue with the
following to log the results of test #51 to the display.
1d-6 Special Cases
A23 10 MHz Reference
8. Select Output Menu When to Log Always (asterisk
on).
9. Press 4PRIOR5.
10. Select Log (asterisk on).
11. Select Do test #51 .
12. Select Cont until the test is complete (the selftest
menu will return when the test is complete).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Selecting When to Log Always causes the results of
each measurement or group of measurements to be
reported. In many cases, this might be too much data.
To reduce the amount of data, and how often you have
to select Cont , you can select When to Log OnFail .
In this case, only failures are logged to the display. To
continually run test #51 and report only failures to the
display, loop and log to the display as shown in the
following sequence:
13. Select Output Menu When to Log OnFail (asterisk
on).
14. Press 4PRIOR5.
15. Select Loop (asterisk on). Log also has an asterisk
on.
16. Select Do test #51 .
17. To stop the looping, select Loop (asterisk o).
18. To restart the looping, select Loop (asterisk on) and
Do Test #51 .
19. Remove the instrument top cover and carefully
remove the coax cable from A5J1 (the left-most coax
cable connected to A5). Notice that the instrument
immediately begins to log the failures to the display.
20. Reconnect the cable and select Cont (you may have
to select Cont more than once). When the test is
complete, the instrument will begin logging to the
display until it encounters another failure.
21. To stop looping and logging, again select Loop and
Log (asterisks o).
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNN
A23 10 MHz Reference
Special Cases 1d-7
In the following example, you will run a test and log
all of the test results to a printer. As in logging to the
display, you can choose to log all of the data or fail-only
data. Logging data to a printer can be useful in situations
that require testing over a long period of time or during
temperature cycling.
22. Connect the printer to the synthesizer's GPIB port.
23. Set the printer to listen only and address 0.
24. Cycle the printer power.
25. Select Output Menu Log Data to Printer
(asterisk on).
26. Select When to Log Always (asterisk on).
27. Press 4PRIOR5.
28. Select Loop (asterisk o). Log also has an asterisk
on.
29. Select Do Test #51 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
The printer should print the results of test #51. To stop
the printing, select Loop (asterisk o).
NNNNNNNNNNNNNN
The following demonstrates logging only failures to the
printer.
30. Select Output Menu .
31. Select When to Log OnFail (asterisk on).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Log Data to Printer also has an asterisk on.
32. Press 4PRIOR5.
33. Select Loop (asterisk on). Log also has an asterisk
on.
34. Select Do Test #51 .
NNNNNNNNNNNNNN
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
The printer will not print unless the synthesizer fails this
test.
35. Remove the instrument top cover and carefully
remove the coax cable from A5J1 (the left-most
coax cable connected to A5). Notice that the printer
immediately begins to log the failures.
36. Reconnect the cable. The printer should stop logging.
37. To stop looping the test, select Loop (asterisk o).
NNNNNNNNNNNNNN
1d-8 Special Cases
A23 10 MHz Reference
Frequency List and Alternate Registers
These features may be used to replicate a problem.
Frequency list allows you to set up an arbitrary list of
frequencies, power levels, and dwell times. Alternate
registers causes the synthesizer to alternate on successive
sweeps between the present instrument state and a
second instrument state stored in an internal register.
See the \Operating and Programming Reference"
for additional information. Once you have created a
frequency list or have set up for alternating registers,
then exercise the instrument and check for unlock
failures.
The following example creates a frequency list that steps
from 200 to 500 MHz in 10 steps. The instrument will
dwell at each frequency for 500 ms. The list is saved to
register 1. The instrument's fault and unlock indicators
are monitored. Finally, a ramp sweep is alternated with a
list sweep.
1. Press 4PRESET5 FREQUENCY 4MENU5.
2. Select List Menu .
3. Select Delete Menu All (This clears any current
list.)
4. Select Auto Fill Start .
5. Press 42005 4MHz5.
6. Select Auto Fill Stop .
7. Press 45005 4MHz5.
8. Select Auto Fill #Pts .
9. Press 4105 4ENTER5.
10. Select Global Dwell .
11. Press 45005 4msec5.
12. Press SWEEP 4MENU5.
13. Select Sweep Mode List (asterisk on). (This starts
the list sweep mode.)
14. Press 4SAVE5 415 4ENTER5 (Saves the list to register 1.)
Now, to view the instrument's state:
15. Press 4SERVICE5.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
A23 10 MHz Reference
Special Cases 1d-9
16.
17.
18.
19.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Select Fault Menu .
Select any one of the three fault menus.
Press 4PRIOR5.
Select Unlock Info (asterisk on). You can now see
the state of any of the major loops (see SC.220 for
more information).
The following is an example of a setup for alternating
registers. One will be the frequency list saved to register
1 in the previous example, the other will be the preset
state of the instrument (an analog sweep).
20. Press 4PRESET5 SYSTEM 4MENU5 (the instrument should
be sweeping normally).
21. Select Alternate Regs (asterisk on).
22. You should now see the sweep indicator ashing as it
switches between the two setups.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1d-10 Special Cases
A23 10 MHz Reference
SC.220 Direct Control and Monitoring
Direct control and monitoring allow you to test or
monitor hardware in a particular state. Since you have
some control over the individual modules and loops, you
can verify whether a specic instrument state causes a
failure and you can check the apparent state (what the
processor thinks) of the hardware.
The following example sets up the fractional-N (A4) loop
at 50 MHz, looks at the fractional-N OOL line (Out Of
Lock), and views the YO and other frequencies.
Note
When the display indicates a loop value, this is the
frequency that the microprocessor has set up. The
frequency was not measured and reported. Therefore, if
the frequency displayed is dierent from real frequency
you have an indication of a problem.
1. Press 4PRESET5 4CW5 (CW keeps the fractional-N at one
frequency).
2. Press 4SERVICE5.
3. Select Tools Menu .
4. Select CntlPLL Menu (Control Phase Locked Loop).
5. Select Frac N Menu CW .
6. Press 4505 4Mhz5. (Sets the fractional-N to 50 MHz.)
7. Press 4PRIOR5 4PRIOR5.
8. Select ViewHdwr Menu (View Hardware).
9. Select PLLs Freqs (asterisk on). You can see the
fractional-N is set to 50 MHz.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
A23 10 MHz Reference
Special Cases 1d-11
NNNNNNNNNNNNNNNNNNNNNNNNNN
Interpret the ViewHdwr display as follows:
Label
Interpretation
FRAC-N(MHz)
The frequency of the fractional-N
(A4).
The frequency of the sampler
(A6).
The fractional-N frequency
divisor in the YO phase detector
(A5). This number should be 3 or
4.
The harmonic of the sampler
frequency.
The frequency band we are using
(0 through 4). This indicates the
harmonic of the YO to which the
amp/mult (A28) is tuned. [Except
in the case of band 0 where the
frequency of the YO is mixed
down using the low band (A24)
assembly.]
SAMPLER(MHz)
/
HARM
BAND
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Now select YO Freq/Harm (asterisk on). Interpret the
display as follows:
Label
Interpretation
CW(MHz)
BAND
The frequency of the YO.
The frequency band we are using (0
through 4). This indicates band 2
because the frequency is set to slightly
more than 10 GHz.
Just as you set the fractional-N frequency, you can
control the sampler (A6) frequency using 4SERVICE5
Tools Menu CntlPLL Menu Sampler Menu .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
In the sampler menu you can set the frequency of the
sampler.
1d-12 Special Cases
A23 10 MHz Reference
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Other useful softkeys in the CntlPLL Menu are
Loop Cntl Menu and NoPhase Lock . Loop Cntl Menu
allows you to control the phase lock loop frequency.
NoPhase Lock lets you open the YO loop which allows
you to tune the YO independent of the rest of the loop.
1. Select PLLs Freqs (asterisk o).
2. Press 4SERVICE5.
3. Select Unlock Info (asterisk on).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
The modules shown are checked for unlock failures. If no
unlock is found, OK is displayed.
Sometimes it is useful to open up the ALC loop
to keep it from railing. (Press 4ALC5 and select
Leveling Mode ALCoff .) An UNLVLED indicator comes
on because leveling (ALC action) is not functioning. In
normal operation this indicator means that the power
requested is not available.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SC.230 Exchanging Assemblies
Exchanging assemblies might be the only way to isolate
some problems. The following is a list of assemblies
and the adjustments that may be required to make the
synthesizer operational if the assembly is replaced. If the
adjustments are not performed, failures may occur such
as severe power loss or drop out, failure to lock or sweep
properly, squegging, and unleveled indications. Perform
the adjustments indicated in the following table in order
to verify that you have eliminated the problem assembly.
Then, to ensure that the synthesizer meets specications,
go to \Post Repair Procedures" and perform the required
adjustments and performance tests.
A23 10 MHz Reference
Special Cases 1d-13
Assembly Adjustments Required
for Operation
Diculty Equipment
Required
A15
Low
Medium
Low
Low
Low
Low
High
Low
Low
Low
Low
High
Low
Medium
A5
A6
A9
A12
A13
A28
A33
ADC
Move Memory (A15.9001)
YO Loop Gain
Sampler Assembly
Amplier Detector Oset
Pulse Delay
Amplier/Multiplier Adjustments
Low Power SRD Bias
YO Driver +10V Reference
YO Gain & Linearity
YO Delay
Amplier/Multiplier Adjustments
Power Flatness
Amplier Detector Gain
Minimal
None
None
None
None
Minimal
Extensive
Minimal
None
None
None
Extensive
Minimal
None
Calibration data specic to your instrument is stored
in the microprocessor (A15). If you are exchanging
assemblies, be sure you know which ones are the
originals. The original calibration data will not apply to
new assemblies. To avoid having to reacquire calibration
data through adjustments that can be lengthy, once you
have located the failed assembly ensure that you return
all of the other original assemblies to the instrument.
The calibration data for the instrument resides in RAM
and EEROM on A15. If A15 has failed, this data must be
transferred to the new A15 assembly. Be certain that
A15 has failed before attempting to move the calibration
data. An error in the procedure could cause all of this
information to be lost and recreating the information is a
very lengthy procedure. A15.9001 gives the procedure
for transferring the calibration data.
1d-14 Special Cases
A23 10 MHz Reference
SC.240 System Failures
System failures are failures that have only been
demonstrated as a part of a system (a collection of
instruments). In general, the failure cannot be repeated
or characterized without a system present. When
troubleshooting system failures, use the following
suggestions in the order given:
1. Ensure that you have the proper equipment for
troubleshooting. A spectrum analyzer and an
oscilloscope are usually required.
2. Run the diagnostic routines of all instruments in the
system. Eliminate any errors that are identied by the
diagnostics before continuing.
3. Determine the minimum system required to replicate
the problem. When eliminating portions of the system,
eliminate software rst, if possible.
4. Check the system for excessive cable lengths, poor
grounds and improper installation (overheating, air
blockage).
5. Verify that all instruments contain compatible versions
of rmware and software.
6. If the failure is also intermittent, check the
environment and timing of the failures. Note any
relationship to time of day, local maintenance
schedules, day of the month, weekends, season, or
local holidays. Also check any severe line power
problems or limitations (these may be related to local
production eorts).
SC.250 Block Diagram Notes
This section describes the YO loop RF path and the
two ALC loops, and gives help interpreting the block
diagram. Also, tables showing the interconnection of
data, addresses, and busses are given.
The YO loop phase lock is obtained using a feedback
path. The entire path (forward and feedback) is as
follows. Beginning with the YO (A26), the signal is passed
to the directional coupler (A39). The coupled output of
A23 10 MHz Reference
Special Cases 1d-15
the directional coupler is fed back through AT3, W51,
FL2, and W54 to the sampler (A6). Harmonic mixing
takes place in the sampler (A6) and then the heterodyned
output from the sampler (A6) is fed to the YO phase
detector. This signal is mixed with the divided output of
the fractional-N (A4) to obtain phase error information.
This phase error signal is amplied by the YO driver and
used to control the frequency of the YO (A26). Note that
the YO is driven by a low frequency path (via A13) and a
high frequency path out of the YO phase detector (A5). If
either path is broken, the YO will not lock.
Two ALC loops exist. One loop exists for band 0; the
other loop is for all other bands. The band 0 path
includes the sampled and detected output from the low
band (A24) via W24 to the ALC (A10). This voltage is
compared to a reference (from A14). The dierence
between these signals is an error signal that is amplied
and sent back to the low band (A24) modulator.
The second ALC loop begins with the bridge detector
(A30) or the coupler/detector in the HP/Agilent
83623B/24B and 83623L. Like band 0, this signal goes
to the ALC (A10) where it is compared to a reference.
The dierence between the reference and the detector
output voltage is used as an error signal. This error signal
is sent back to the dual modulator (A38) where it is used
to control the loop gain. And nally the level-corrected
signal out of the dual modulator (A38) is frequency
multiplied and ltered (A28).
Notice that the reference signal for level control in both
ALC loops is created by the sweep generator (A14). This
is specically the \LEVEL REF TO A10" exiting the
sweep generator. While it is not shown on the block
diagram, it does connect directly to the ALC (A10). If
this level reference is lost, the ALC loop will not be
controllable.
1d-16 Special Cases
A23 10 MHz Reference
The block diagram is intended to relate both physical and
electrical information. The following items will help you
interpret the block diagram:
PC assemblies shown with tabs are located in the
open card cage or in the in the covered power supply
cage (A17, A18) located at the left, rear corner of the
instrument.
The 22 V transformer shown next to the switching
regulator (A18) is located between the covered power
supply section and the rear panel. Dangerous voltages
exist in this area.
All components located on the RF deck are located
inside the heavy border labeled RF DECK.
Semi-rigid coax cables are shown with a double line
and are labeled with a reference designator (for
example, W46 from A38 to A28 on the RF deck).
Flexible coax cables are shown with a single line and
are labeled with a reference designator (for example,
W20 from A7J7 to A24).
All other lines are part of the motherboard.
All fuses are shown.
The rear panel line fuse is next to the switching
regulator (A18).
Eight fuses are located on the post regulator (A16).
Some of these fuses are soldered-in.
One fuse is located on the rectier/lter (A17).
One fuse is located on the switching regulator (A18).
This fuse has an LED located close by. If the LED is
on, the fuse is good.
One fuse is located on the RF Interface (A20, on the
RF deck).
Assemblies shown in the front or rear panels are
located in those panels including A2. However, part of
A2 is shown in the lower left-hand corner of the block
diagram. This portion of A2 contains the front panel
power switch and was positioned at this point on the
block diagram for convenience.
Signals are labeled with power and frequency limits
if appropriate. Signals not labeled are either TTL
(digital) signals or they are too complex or unique to
characterize for the purposes of the block diagram.
A23 10 MHz Reference
Special Cases 1d-17
Cables are labeled with reference designators.
Signals going from the RF interface (A20) to the RF
deck are actually ribbon cables. These ribbon cables
carry power supply voltages and signals required for
controlling the microcircuits.
1d-18 Special Cases
A23 10 MHz Reference
Data and Address Bus Connections
0
1
Data Bus
2
3
4
XA4J1
XA5J1
XA6J1
XA7J1
XA8J1
XA9J1
XA10J1
XA11J1
XA12J1
XA13J1
9
34
10
35
11
36
12
37
4
29
5
30
XA14J1
XA15J1
12
52
13
53
14
54
15
55
7
47
8
XA20J1
5
39
4
38
3
37
2
36
10
9
A22J1
22
21
20
19
18
17
16
15
{
A22J2
23
24
25
26
27
28
29
30
A22J8
52
51
50
49
48
47
46
46
A23 10 MHz Reference
5
6
7
0
1
Address Bus
2
3
4
5
6
6
31
7
48
9
49
10
44
8
43
7
42
{
28
27
26
25
23
14
15
16
17
18
19
20
57
58
{
{
55
56
54
Special Cases 1d-19
Strobes
1d-20 Special Cases
Source
Sinks
Strobe0
XA15J1{44
XA13J1{26
A22J8{60
Strobe1
Strobe2
XA15J1{4
XA14J1{44
XA15J1{43
XA11J1{26
XA12J1{26
XA14J1{43
Strobe3
XA15J1{3
XA9J1{26
XA10J1{26
XA14J1{3
Strobe4
XA15J1{42
XA6J1{26
XA7J1{26
XA8J1{26
XA14J1{42
Strobe5
XA15J1{2
XA4J1{26
XA5J1{26
XA14J1{2
Strobe6
XA15J1{41
XA14J1{41
XA20J1{57
Strobe7
XA15J1{1
A2J1{31
A3J2{12
XA14J1{1
A23 10 MHz Reference
Power Supply Connections (1 of 3)
XA4J1{
XA4J2{
XA5J1{
XA5J2{
XA6J1{
XA6J2{
XA7J1{
XA7J2{
XA8J1{
XA8J2{
A23 10 MHz Reference
05.2V
{
+8V
{
015V
{
{
{
{
{
11
12
41
42
16
17
46
47
{
{
{
{
{
16
17
46
47
{
{
{
{
{
16
17
46
47
{
{
{
{
{
16
17
46
47
{
{
{
16
17
46
47
08V
{
040V
{
+5.2VA +5.2VD
{
15
16
40
41
14
44
19
49
{
{
{
{
15
16
40
41
11
12
41
42
14
44
19
49
{
{
{
{
15
16
40
41
11
12
41
42
14
44
19
49
{
{
{
{
15
16
40
41
11
12
41
42
14
44
19
49
{
{
{
{
15
16
40
41
11
12
41
42
14
44
19
49
{
+15V
{
8
9
38
39
{
8
9
38
39
{
8
9
38
39
{
8
9
38
39
{
8
9
38
39
Special Cases 1d-21
Power Supply Connections (2 of 3)
XA9J1{
XA9J2{
XA10J1{
XA10J2{
XA11J1{
XA11J2{
XA12J1{
XA12J2{
XA13J1{
XA13J2{
1d-22 Special Cases
05.2V
{
+8V
{
015V
{
{
{
{
{
11
12
41
42
16
17
46
47
{
{
{
{
{
16
17
46
47
{
{
{
{
{
16
17
46
47
{
{
{
{
{
16
17
46
47
{
{
{
16
17
46
47
08V
{
040V
{
+5.2VA +5.2VD
{
15
16
40
41
14
44
19
49
{
{
{
{
15
16
40
41
11
12
41
42
14
44
19
49
{
{
{
{
15
16
40
41
11
12
41
42
14
44
19
49
{
{
{
{
15
16
40
41
11
12
41
42
14
44
19
49
{
{
{
{
15
16
40
41
11
12
41
42
14
44
19
49
{
+15V
{
8
9
38
39
{
8
9
38
39
{
8
9
38
39
{
8
9
38
39
{
8
9
38
39
A23 10 MHz Reference
Power Supply Connections (3 of 3)
XA14J1{
XA14J2{
XA15J1{
XA15J2{
XA16J1{
05.2V
{
+8V
{
015V
{
{
{
{
{
13
14
48
49
18
19
53
54
18
19
58
59
{
{
{
6
7
8
46
47
48
{
18
19
53
54
08V
{
040V
{
+5.2VA +5.2VD
{
18
19
58
59
16
51
21
56
{
{
{
{
18
19
58
59
13
14
48
49
25
26
65
66
16
51
21
56
{
22
62
13
14
53
54
39
40
79
80
+15V
{
10
11
45
46
{
10
11
45
46
30
31
70
71
XA17J1{
{
30
60
{
{
{
{
{
XA20J1{
29
64
27
62
13
48
{
{
2
{
31
32
66
67
29
{
{
{
J8{
8
{
14
15
49
50
9
10
11
12
1
2
3
5
26
61
J1{
34
35
69
70
6
{
{
42
4
A23 10 MHz Reference
17
18
47
48
Special Cases 1d-23
1e
Troubleshooting Block Diagrams
The block diagrams provided in this chapter apply to
instruments having serial number prex 3844A only.
If you require block diagrams for serial number prexes
< 3844A, you must order the following:
Description
Part Number
8360 B-Series Swept Signal Generator/
8360 L-Series Swept CW Generator
Obsolete Block Diagrams
A23 10 MHz Reference
08360-90179
Troubleshooting Block Diagrams
1e-1
so72bl
so73bl
so74bl
HP 83620B/22B/30B
OPTION 006
(Serial Prefix > 3844A)
HP 83623B/24B
OPTION 006
(Serial Prefix > 3844A)
so75bl
so76bl
HP 83640B/50B
OPTION 006
(Serial Prefix > 3844A)
so77bl
HP 83640L/50L Block Diagram
(Serial Prefix > 3844A
so78bl
HP 83640L/50L Block Diagram
(Serial Prefix > 3844A
so79bl
2
Instrument History
How to Use Instrument History
This manual documents the current production
versions of the \standalone" 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator.
This manual will be modied to apply to future versions
of these instrument models. Information provided in this
chapter will then allow you to adapt this manual to the
earlier versions. If your instrument is one of the earlier
versions, you may have to modify your manual using
the information in this chapter. Check the serial number
prex attached to your synthesizer's rear panel and then
locate it in the following tables. The tables tell you which
changes to make. Incorporate the changes in reverse
alphabetical order.
HP/Agilent
83620B/22B/23B/24B/30B/40B/50B
Serial Number Prex Required Changes
3844A
3722A and below
No Change Needed
A
HP/Agilent 83623L/30L/40L/50L
Serial Number Prex Required Changes
3844A
3722A and below
Agilent 8360
Troubleshooting
No Change Needed
A
Instrument History 2-1
Agilent Technologies Internal Use Only
PCO 3844A:11159
2-2 Instrument History
Agilent 8360
Troubleshooting
Change A
Change A
The A4 Fractional-N Assembly has Changed
All 8360 B-Series and 8360 L-Series instruments
with serial prex numbers 3722A and below have a
Fractional-N assembly that is dierent than the one
documented in this manual. As a result, you must apply
the changes described in this section in order for this
manual to conform to your instrument.
Instrument Level Troubleshooting
Use the information in this section instead of the
equivalent information provided in the \Instrument Level
Troubleshooting" chapter.
Calibration Constants
Table 2-1.
Assemblies and Corresponding Cal Constant ID
Numbers and Revisions
Assembly ID Number Revision Part Number
A4
Agilent 8360
Troubleshooting
None
#496
0
08360-60010
Description
Fractional{N
Instrument History 2-3
Change A
ILT.2000
Select the failing adjustment and go to the indicated
paragraph.
Failed Adjustment
ADC Calibration
10 MHz Standard
Fractionl-N VCO
Fractional-N Reference and API Spurs
Sweep Ramp
YO Driver +10V Reference
Modulation Generator
Sampler Assembly
YO Loop Gain
YO Driver Gain and Linearity
YO Delay
FM Gain
FM Gain, Opt. 002 installed
Modulator Oset and Gain
AM Delay
AM Delay, Opt. 002 installed
AM Accuracy
AM Accuracy, Opt. 002 installed
Power Flatness
ALC Power Level Accuracy
SYTM Tracking and Delay Compensation
Low Power SRD Bias
Square Wave Symmetry
Step Attenuator Flatness
ILT.2630
2-4 Instrument History
Go to Paragraph
A15.9000
A23.9000
A4.9000
A4.9000
A14.9000
A13.9000
A8.9000
ILT.2010
A5.9000
ILT.2030
ILT.2030
ILT.2100
ILT.2140
ILT.2110
ILT.2130
ILT.2150
ILT.2130
ILT.2150
ILT.2240
ILT.2240
RF.2890
RF.2890
A9.9000
ILT.2300
There are two types of non-harmonic, non-line related
spurious signals (spurs):
Crossing spurs. These are usually caused by poor
shielding, or by interaction between the YO loop phase
detector assembly (A5) and the sampler assembly (A6).
Another cause is 10 MHz or a harmonic of 10 MHz
getting into the sampler assembly. Check shielding,
Agilent 8360
Troubleshooting
Change A
grounds, ltering on the A6 assembly, and cable
routing.
Fixed oset spurs. These are the most common spurs.
They appear at a xed oset from the carrier.
The following table lists the most common oset spurs,
the their possible causes.
Note
If the fault is only in low band, the low band microcircuit
(A24) is also a possible cause.
Oset from Carrier
Most Likely Fault
60 kHz
Grounds, connections and shielding,
A16, A17, A18
120 kHz
A16, A17, A18
20 or 40 kHz
A3, A6 shielding/ltering
125 kHz
A4 API adjustment, shielding,
ltering; possibly reference
shielding, ltering.
Random Low Frequency Fan (B1)
10 or 20 MHz
Routing of cables to and from A7.
These problems are very dicult to isolate, and require
patience. Often, the quickest and most economical way
to isolate a problem is to substitute modules.
After taking action, go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
Agilent 8360
Troubleshooting
Instrument History 2-5
Change A
ILT.3112
Go To A7.9000
2-6 Instrument History
Continue
Agilent 8360
Troubleshooting
Change A
Assembly Level Troubleshooting: A4 Fractional-N
Use the information in this section instead of the
equivalent information provided in the \Assembly Level
Troubleshooting" chapter.
A4.000
Agilent 8360
Troubleshooting
Message Displayed on Synthesizer
Go to
Paragraph
A4 :
A4 :
A4 :
A4 :
A4 :
A4 :
A4 :
A4 :
A4 :
A4 :
A4.100
A4.200
A4.300
A4.400
A4.9000
A4.9000
A4.9000
A4.9000
A4.9000
A4.9000
Read Buers
03.25V Supply
Tuning Range
FNGO Control
D-REF Supply
FN Chip Registers
+2.2V Supply
Sweep Test
Switching Speed
Monotonicity
Instrument History 2-7
Change A
A4.100
Go To A4.1300
Continue
A4.101
Go To A4.1305
2-8 Instrument History
Continue
Agilent 8360
Troubleshooting
Change A
A4.102
Loop self-test #232:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42325 4ENTER5.
4. Select Loop Do Test #232 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A4.1310
Agilent 8360
Troubleshooting
Continue
Instrument History 2-9
Change A
A4.103
Loop self-test #231:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 42315 4ENTER5.
4. Select Loop Do Test #231 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A4.1315
2-10 Instrument History
Continue
Agilent 8360
Troubleshooting
Change A
A4.104
Go To A4.1320
Continue
A4.105
Go To A4.1325
Agilent 8360
Troubleshooting
Go To A4.9000
Instrument History 2-11
Change A
A4.200
Go To A4.1330
Continue
A4.201
Go To A4.1300
2-12 Instrument History
Go To A4.9000
Agilent 8360
Troubleshooting
Change A
A4.300
The pulse width is 10 to 20 ns. The frequency is 125 kHz.
The oscilloscope must present a 50
load. Do not use a
high impedance probe. The combination of low frequency
and narrow pulse width makes this a very dicult
pulse to see. Do not use a frequency counter to check
frequency, because of the tendency to count the second
harmonic.
Go To A4.320
Continue
A4.301
Perform the following setup:
1. Turn the synthesizer o.
2. Remove the A4 assembly.
3. Turn the synthesizer on.
4. Press 4PRESET5 4CW5 4SERVICE5.
5. Select Unlock Info .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Does FRACN indicate OK?
Go To A4.1335
Agilent 8360
Troubleshooting
Continue
Instrument History 2-13
Change A
A4.302
Perform the following setup:
1. Carefully short XA4J1-50 to ground (A4 should still be
removed).
2. Select Unlock Info Unlock Info (press
Unlock Info twice to reacquire data).
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Does FRACN indicate UNLOCK?
Go To A4.1335
Continue
A4.303
Perform the following setup:
1. Turn the synthesizer o.
2. Re-install the A4 assembly and reconnect the cables.
3. Turn the synthesizer on.
Loop self-test #35:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4355 4ENTER5.
4. Select Loop Do Test #35 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
2-14 Instrument History
Agilent 8360
Troubleshooting
Change A
Go To A4.9000
Continue
A4.304
Perform the following setup:
1. Press 4PRESET5 4SERVICE5.
2. Select Adjust Menu AssyAdj Menu .
3. Select A4 VCO Tune .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Is the adjustment needle in the middle third of the
synthesizer display?
Continue
Agilent 8360
Troubleshooting
Go To A4.9000
Instrument History 2-15
Change A
A4.305
Try to execute the A4 VCO tune adjustment (refer to
the Agilent Technologies 8360 B-Series Swept Signal
Generator/L-Series Swept CW Generator Service Guide)
and then continue.
Was the adjustment successful?
Go To A4.9000
Continue
A4.306
Do self-test #29:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4295 4ENTER5.
4. Select Do Test #29 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Did self-test #29 pass?
Go To A4.9000
Continue
A4.307
The adjustment may have repaired the A4 assembly. Go
to \Instrument Level Troubleshooting."
2-16 Instrument History
Agilent 8360
Troubleshooting
Change A
A4.320
The pulse width is 10 to 20 ns. The frequency is 125 kHz.
The oscilloscope must present a 50 load. Do not use a
high impedance probe. The combination of low frequency
and narrow pulse width makes this a very dicult
pulse to see. Do not use a frequency counter to check
frequency, because of the tendency to count the second
harmonic.
Go To A7.9000
Continue
A4.321
Replace W11 (A7J3 to A4J1) and go to the
Troubleshooting Foldout, block 1 (located just prior to the
\Special Cases" tab).
Agilent 8360
Troubleshooting
Instrument History 2-17
Change A
A4.400
Loop self-test #37:
1. Press 4PRESET5 4SERVICE5.
2. Select Selftest Menu .
3. Press 4375 4ENTER5.
4. Select Loop Do Test #37 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Go To A4.1340
2-18 Instrument History
Go To A4.9000
Agilent 8360
Troubleshooting
Change A
A4.1300
There is an open on the motherboard between XA4J1-15,
16, 40, or 41 and XA7J1-15, 16, 40, or 41. Verify this
with an ohmmeter. Is jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1301
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A4.1305
There is an open on the motherboard between XA4J1-43
and XA7J1-43. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1306
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
Agilent 8360
Troubleshooting
Instrument History 2-19
Change A
A4.1310
Go To A15.9000
Continue
A4.1311
There is an open on the motherboard between XA4J1-26
and XA15J1-2. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1312
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
2-20 Instrument History
Agilent 8360
Troubleshooting
Change A
A4.1315
Go To A15.9000
Continue
A4.1316
There is an open on the motherboard between XA4J1-4
and XA15J1-7. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1317
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
Agilent 8360
Troubleshooting
Instrument History 2-21
Change A
A4.1320
Go To A15.9000
Continue
A4.1321
There is an open on the motherboard between XA4J1-29
and XA15J1-52. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1322
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
2-22 Instrument History
Agilent 8360
Troubleshooting
Change A
A4.1325
Go To A15.9000
Continue
A4.1326
There is an open on the motherboard between XA4J1-31
and XA15J1-49. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1327
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
Agilent 8360
Troubleshooting
Instrument History 2-23
Change A
A4.1330
There is an open on the motherboard between XA4J2-11,
12, 41, or 42 and XA7J2-11, 12, 41, or 42. Verify this
with an ohmmeter. Is jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1331
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A4.1335
Using an ohmmeter, measure the resistance from
XA4J1-50 to XA15J1-77.
Is the resistance less than or equal to 2 ?
Continue
2-24 Instrument History
Go To A15.9000
Agilent 8360
Troubleshooting
Change A
A4.1336
There is an open on the motherboard between XA4J1-50
and XA15J1-77. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1337
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
A4.1340
Go To A14.9000
Agilent 8360
Troubleshooting
Continue
Instrument History 2-25
Change A
A4.1341
There is an open on the motherboard between XA4J1-2
and XA14J1-5. Verify this with an ohmmeter. Is
jumpering an acceptable repair?
Go To A22.9000
Continue
A4.1342
Install a jumper and go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
2-26 Instrument History
Agilent 8360
Troubleshooting
Change A
A4.9000
Agilent 8360
Troubleshooting
Replace the A4 assembly.
Instrument History 2-27
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