Motorola | Astro Digital Saber III | Service manual | Motorola Astro Digital Saber III Service manual

ASTRO Digital SABER
Portable Radios
Basic Service Manual
*68P81076C05*
FOREWORD
The information contained in this manual relates to all ASTRO Digital SABER radios, unless otherwise
specified.
SAFETY INFORMATION
The Federal Communications Commission (FCC), with its action in General Docket 79-144, March 13, 1985,
has adopted a safety standard for human exposure to radio frequency (RF) electromagnetic energy emitted by
FCC-regulated equipment. Motorola subscribes to the same safety standard for the use of its products. Proper
operation of this radio will result in user exposure substantially below FCC recommended limits.
•
DO NOT hold the radio with the antenna very close to, or touching, exposed parts of the body, especially the
face, ears, or eyes, while transmitting. Hold the radio in a vertical position with the microphone two to three
inches away from the lips.
•
DO NOT hold the transmit switch (PTT) on when not actually desiring to transmit.
•
DO NOT allow children to play with any radio equipment containing a transmitter.
•
DO NOT operate this equipment near electrical blasting caps or in an explosive
atmosphere. Under certain conditions, radios can interfere with blasting operations.
When you are in the vicinity of construction work, look for, and observe, signs cautioning
against radio transmissions. If radio transmission is prohibited, you must not transmit until
out of the area. Furthermore, you must turn off your radio to prevent any accidental
transmission.
•
DO NOT replace or charge batteries in a hazardous atmosphere. Contact sparking may
occur while installing or removing batteries and cause an explosion.
•
TURN THE RADIO OFF when removing or installing a battery.
MAEPF-1781
MAEPF-17813-A
Anyone intending to use a radio in a hazardous area is advised to become familiar with the subject of intrinsic
safety and with Section 70 of the National Fire Code, which is commonly referred to as Article 500 of the National
Electric Code. Use of anything but factory supplied components may affect the approval and safety of the radio.
Likewise, it is advised that servicing should be performed only by qualified personnel who adhere to the following
Factory Mutual (FM) required warning:
WARNING
Modification of FM approved intrinsically safe radios will negate Factory Mutual Research
Corporation (FMRC) approval.
MANUAL REVISIONS
Changes which occur after this manual is printed are described in “FMRs.” These FMRs provide complete
information on changes including pertinent parts listing data.
COMPUTER SOFTWARE COPYRIGHTS
The Motorola products described in this manual may include copyrighted Motorola computer programs stored in
semiconductor memories or other media. Laws in the United States and other countries preserve for Motorola certain
exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form the
copyrighted computer program. Accordingly, any copyrighted Motorola computer programs contained in the Motorola
products described in this manual may not be copied or reproduced in any manner without the express written
permission of Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly
or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Motorola,
except for the normal non-exclusive royalty free license to use that arises by operation of law in the sale of a product.
TM
™
Digital SABER™
Portable Radios
CONTENTS
TITLE
PAGE
FOREWORD...................................................................................................................................................inside front cover
LIST OF TABLES .....................................................................................................................................................................ii
LIST OF ILLUSTRATIONS .......................................................................................................................................................ii
RELATED PUBLICATIONS AVAILABLE SEPARATELY.........................................................................................................ii
PORTABLE RADIO MODEL NUMBERING SYSTEM.............................................................................................................iii
SPECIFICATIONS FOR VHF RADIOS ...................................................................................................................................iv
SPECIFICATIONS FOR UHF RADIOS....................................................................................................................................v
SPECIFICATIONS FOR 800MHz RADIOS .............................................................................................................................vi
SECTION I. INTRODUCTION
A.
B.
C.
General ...........................................................................................................................................................1
Radio Description............................................................................................................................................1
...............................................................................................................................................1
A.
B.
C.
Introduction to This Section ............................................................................................................................3
Preventive Maintenance .................................................................................................................................3
Handling Precautions......................................................................................................................................3
TM
SECTION II. BASIC MAINTENANCE
SECTION III. RECOMMENDED TEST EQUIPMENT,
SERVICE AIDS, AND TOOLS
A.
B.
C.
Recommended Test Equipment .....................................................................................................................5
Service Aids and Recommended Tools..........................................................................................................6
Field Programming Equipment .......................................................................................................................6
A.
B.
C.
Introduction to This Section ............................................................................................................................7
Setup...............................................................................................................................................................7
Test Mode .......................................................................................................................................................7
A.
B.
C.
D.
E.
F.
G.
Introduction to This Section ..........................................................................................................................11
General .........................................................................................................................................................11
Reference Oscillator Alignment ....................................................................................................................13
Transmit Power Alignment............................................................................................................................14
Transmit Deviation Balance (Compensation) Alignment ..............................................................................15
Transmit Deviation Limit Alignment ..............................................................................................................16
Front-End Filter Alignment (VHF/UHF Only).................................................................................................17
A.
B.
C.
Disassembly..................................................................................................................................................19
Servicing Major Subassemblies....................................................................................................................21
Reassembly ..................................................................................................................................................22
SECTION IV. PERFORMANCE CHECKS
SECTION V. RADIO ALIGNMENT PROCEDURE
SECTION VI. DISASSEMBLY/REASSEMBLY PROCEDURES
, Motorola, ASTRO, SABER, FLASHport, SMARTNET, Stat-Alert, SABER SI, CoveragePLUS, Private-Line,
and Digital Private Line are trademarks of Motorola, Inc.
© 1993 by Motorola, Inc., Radio Products Group
8000 W. Sunrise Blvd., Ft. Lauderdale, FL 33322
Printed in U.S.A. 5/93. All Rights Reserved.
Basic Service Manual
68P81076C05-O
CONTENTS (cont.)
TITLE
PAGE
SECTION VII. BASIC THEORY OF OPERATION
A.
B.
C.
D.
E.
F.
Introduction to This Section ..........................................................................................................................23
General Overview .........................................................................................................................................23
Analog Mode of Operation ............................................................................................................................23
ASTRO Mode of Operation...........................................................................................................................23
RF Board Basic Theory of Operation............................................................................................................23
Controller Board Basic Theory of Operation .................................................................................................24
A.
B.
C.
D.
Introduction to This Section ..........................................................................................................................25
Replacement Board Procedures...................................................................................................................25
Power-Up Error Codes..................................................................................................................................25
Operational Error Codes ...............................................................................................................................26
SECTION VIII. BOARD-LEVEL TROUBLESHOOTING
REPLACEMENT PARTS ORDERING ...........................................................................................................inside back cover
LIST OF TABLES
TABLE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
TITLE
PAGE
ASTRO Digital SABER Basic Features..................................................................................................................1
Recommended Test Equipment.............................................................................................................................5
Service Aids for Board-Level Troubleshooting.......................................................................................................6
Recommended Tools for Board-Level Troubleshooting.........................................................................................6
Initial Equipment Control Settings ..........................................................................................................................7
Test Environments .................................................................................................................................................7
Test Frequencies ...................................................................................................................................................8
Receiver Performance Checks ..............................................................................................................................9
Transmitter Performance Checks ........................................................................................................................10
Reference Oscillator Alignment............................................................................................................................13
Transmit Power Setting........................................................................................................................................14
Transmit Deviation Limit.......................................................................................................................................16
Torque Specifications...........................................................................................................................................22
Local Oscillator and First IF Frequencies.............................................................................................................24
Power-Up Error Code Displays ............................................................................................................................25
Operational Error Code Displays .........................................................................................................................26
Receiver Troubleshooting Chart ..........................................................................................................................26
Transmitter Troubleshooting Chart ......................................................................................................................27
LIST OF ILLUSTRATIONS
FIGURE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
TITLE
PAGE
Radio Alignment Test Setup ................................................................................................................................11
RSS Service Menu Layout ...................................................................................................................................12
Softpot Concept ...................................................................................................................................................12
Reference Oscillator Alignment Screen............................................................................................................13
Transmit Power Alignment Screen ...................................................................................................................14
Transmit Deviation Balance (Compensation) Alignment Screen......................................................................15
Transmit Deviation Limit Alignment Screen......................................................................................................16
Front-End Filter Alignment Screen ...................................................................................................................17
Functional Block Diagram.................................................................................................................................29
Connector Location Details...............................................................................................................................30
Control Top/PTT Flex and Connector Information............................................................................................31
Display Flex and Connector Information...........................................................................................................31
Speaker/Microphone Flex and Connector Information .....................................................................................32
Universal Flex and Connector Information .......................................................................................................32
Controller Board/RF Board Connector Information...........................................................................................33
Controller Board/Encryption Board Connector Information ..............................................................................33
Exploded View Diagram and Parts List ............................................................................................................34
RELATED PUBLICATIONS AVAILABLE SEPARATELY
TYPE OF MANUAL
MANUAL NUMBER
ASTRO Digital SABER User’s Guide ..........................................................................................................................68P81072C80
ASTRO Digital SABER Portable Radios Detailed Service Manual .............................................................................68P81076C10
ii
PORTABLE RADIO MODEL NUMBERING SYSTEM
Typical Model Number: H
Position: 1
0
2
4
3
U
4
C
5
F
6
Position 1 - Type of Unit
H=Hand-Held Portable
Positions 2 & 3 - Model Series
04=ASTRO
Position 4 - Frequency Band
A=Less than 29.7MHz P=336 to 410MHz
B=29.7 to 35.99MHz
Q=403 to 437MHz
C=36 to 41.99MHz
R=438 to 482MHz
D=42 to 50MHz
S=470 to 520MHz
F=66 to 80MHz
T=Product Specific
G=74 to 90MHz
U=806 to 870MHz
H=Product Specific
V=825 to 870MHz
J=136 to162MHz
W=896 to 941MHz
K=146 to178MHz
Y=1.0 to 1.6GHz
L=174 to 210MHz
Z=1.5 to 2.0GHz
M=190 to 235MHz
* Values given represent range only; they are
not absolute.
Position 5 - Power Level
A=0 to 0.7 Watts
B=0.7 to 0.9 Watts
C=1.0 to 3.9 Watts
D=4.0 to 5.0 Watts
E=5.1 to 6.0 Watts
F=6.1 to 10 Watts
Position 6 - Physical Packages
A=RF Modem Operation
B=Receiver Only
C=Standard Control; No Display
D=Standard Control; With Display
E=Limited Keypad; No Display
F=Limited Keypad; With Display
G=Full Keypad; No Display
H=Full Keypad; With Display
J=Limited Controls; No Display
K=Limited Controls; Basic Display
L=Limited Controls; Limited Display
M=Rotary Controls; Standard Display
N=Enhanced Controls; Enhanced Display
P=Low Profile; No Display
Q=Low Profile; Basic Display
R=Low Profile; Basic Display, Full Keypad
Position 7 - Channel Spacing
1=5kHz
5=15kHz
2=6.25kHz 6=20/25kHz
3=10kHz
7=30kHz
4=12.5kHz 9=Variable/Programmable
9
7
P
8
W
9
7
10
A
11
N
12
S
13
P
14
0
15
1
16
Positions 13 - 16
“SP” Model Suffix
Position 12 Unique Model Variations
C=Cenelec
N=Standard Package
Position 11 - Version
Version Letter (Alpha)-Major Change
Position 10 - Feature Level
1=Basic
6=Standard Plus
2=Limited Package
7=Expanded Package
3=Limited Plus
8=Expanded Plus
4=Intermediate
9=Full Feature/
5=Standard Package
Programmable
Position 9 - Primary System Type
A=Conventional
B=Privacy Plus®
C=Clear SMARTNET™
D=Advanced Conventional Stat-Alert™
E=Enhanced Privacy Plus®
F=Nauganet 888 Series
G=Japan Specialized Mobile Radio (JSMR)
H=Multi-Channel Access (MCA)
J=CoveragePLUS™
K=MPT1327*-Public
L=MPT1327*-Private
M=Radiocom
N=Tone Signalling
P=Binary Signalling
Q=Phonenet®
W=Programmable
X=Secure Conventional
Y=Secure SMARTNET™
* MPT=Ministry of Posts and Telecommunications
Position 8 - Primary Operation
A=Conventional/Simplex
B=Conventional/Duplex
C=Trunked Twin Type
D=Dual Mode Trunked
E=Dual Mode Trunked/Duplex
F=Trunked Type I
G=Trunked Type II
H=FDMA* Digital Dual Mode
J=TDMA** Digital Dual Mode
K=Single Sideband
L=Global Positioning Satellite Capable
M=Amplitude Companded Sideband (ACSB)
P=Programmable
* FDMA=Frequency Division Multiple Access
**TDMA=Time Division Multiple Access
iii
SPECIFICATIONS FOR VHF RADIOS
All specifications are per Electronic Industries Association (EIA) 316B unless otherwise noted.
GENERAL
FCC Designation:
Temperature Range:
Operating:
Storage:
RECEIVER
AZ489FT3770
Frequency Range:
Bandwidth:
–30°C to +60°C
–40°C to +85°C
Power Supply: Nickel-Cadmium Battery (NiCd)
or Nickel-Metal-Hydride Battery (NiMH)
Quieting Sensitivity (20dBQ):
TRANSMITTER
136–178MHz
42MHz
0.5µV Max.
RF Power:
136-174MHz
1Watt/5 Watts
174-178MHz
1Watt/4 Watts
Frequency Range:
136–178MHz†
Usable Sensitivity
(12dB SINAD):
0.35µV Max.
Intermodulation:
–70dB
Frequency Stability
(–30 to +60°C; 25°C ref.):
Battery Voltage:
Nominal:
Range:
7.5 Volts
6 to 9 Volts
± .00025%
Emission (Conducted and Radiated):
–66dBw
Selectivity
(30kHz Adjacent Channel):
Recommended Battery:
Medium Capacity NiCd:
NTN4593**
or Ultra–High Capacity NiCd:
NTN4595**
or Medium Capacity NiMH:
NTN7014
or High Capacity NiMH:
NTN7251
Optional FM (Factory Mutual) Battery :
High Capacity FM:
or Ultra-High Capacity FM:
*
NTN4538*/**
–70dB
(Companion Receiver):
Spurious Rejection:
Distortion:
(–30 to +60°C; 25°C reference):
Rated Audio:
± .00025%
Emissions Designators:
Distortion (At Rated Audio):
3% Typical
20K0F1E, 16K0F3E, 15K0F2D,
15K0F1D, and 8K10F1E
Channel Spacing:
30kHz
Dimensions (H x W x D)
Note: 2.64" = width at PTT; 2.94" = width at top
Less Battery:
5.20" x 2.64"/2.94"x 1.23"
(131.32mm x 67.05/74.67mm x 31.24mm)
With Medium Capacity NiCd Battery:
8.34" x 2.94" x 1.28"
(211.82mm x 74.67mm x 31.24mm)
With Ultra-High Capacity NiCd Battery:
9.10" x 2.94" x 1.23"
(231.12mm x 74.67mm x 31.24mm)
With High Capacity NiMH Battery:
8.34" x 2.94" x 1.23"
(211.82mm x 74.67mm x 31.24mm)
12.8oz. (366gm)
26.81oz. (759gm)
29.95oz. (849gm)
26.3oz. (746gm)
Specifications subject to change without notice.
iv
Modulation Limiting:
500mW
Groups A, B, C, and D
Weight: (w/Helical Antenna)
Less Battery:
With Medium Cap. NiCd :
With Ultra-High Cap. NiCd:
With High Cap. NiMH:
3% Typical
Frequency Stability
Groups D, F, and G
** FM Nonincendive: Class I, Division 2,
–45dB Typical
–70dB
NTN4596*/**
FM Intrinsically Safe: Class I, II, III, Division 1,
FM Hum and Noise
±5kHz
SPECIFICATIONS FOR UHF RADIOS
All specifications are per Electronic Industries Association (EIA) 316B unless otherwise noted.
GENERAL
FCC Designation:
Temperature Range:
Operating:
Storage:
RECEIVER
AZ489FT4783
–30°C to +60°C
–40°C to +85°C
TRANSMITTER
Frequency Range:
403-520MHz
Bandwidth:
70MHz Max.
Quieting Sensitivity (20dBQ):
Usable Sensitivity
(12dB SINAD):
Battery Voltage:
Nominal:
Range:
Intermodulation:
–70dB
Selectivity
(25kHz Adjacent Channel):
–70dB
0.35µV Max.
NTN4593**
or Ultra–High Capacity NiCd:
NTN4595**
or Medium Capacity NiMH:
NTN7014
or High Capacity NiMH:
NTN7251
Optional FM (Factory Mutual) Battery :
*
512-520MHz
1Watt/3 Watts
Frequency Range:
450-520MHz†
Frequency Stability
(–30 to +60°C; 25°C ref.):
± .00025%
–66dBw
FM Hum and Noise
Medium Capacity NiCd:
or Ultra-High Capacity FM:
1Watt/4 Watts
Emission (Conducted and Radiated):
Recommended Battery:
High Capacity FM:
450-512MHz
0.5µV Max.
Power Supply: Nickel-Cadmium Battery (NiCd)
or Nickel-Metal-Hydride Battery (NiMH)
7.5 Volts
6 to 9 Volts
RF Power:
NTN4538*/**
NTN4596*/**
FM Intrinsically Safe: Class I, II, III, Division 1,
Spurious Rejection:
450-512MHz
512-520MHz
–70dB
–65dB
(Companion Receiver):
Distortion:
Frequency Stability
(–30 to +60°C; 25°C reference):
Rated Audio:
Distortion (At Rated Audio):
± .00025%
500mW
3% Typical
Groups D, F, and G
Modulation Limiting:
–45dB Typical
3% Typical
±5kHz
Emissions Designators:
20K0F1E, 16K0F3E, 15K0F2D,
15K0F1D, and 8K10F1E
** FM Nonincendive: Class I, Division 2,
Channel Spacing:
25kHz
Groups A, B, C, and D
Dimensions (H x W x D)
Note: 2.64" = width at PTT; 2.94" = width at top
Less Battery:
5.20" x 2.64"/2.94"x 1.23"
(131.32mm x 67.05/74.67mm x 31.24mm)
With Medium Capacity NiCd Battery:
8.34" x 2.94" x 1.28"
(211.82mm x 74.67mm x 31.24mm)
With Ultra-High Capacity NiCd Battery:
9.10" x 2.94" x 1.23"
(231.12mm x 74.67mm x 31.24mm)
With High Capacity NiMH Battery:
8.34" x 2.94" x 1.23"
(211.82mm x 74.67mm x 31.24mm)
Weight: (w/Helical Antenna)
Less Battery:
With Medium Cap. NiCd :
With Ultra-High Cap. NiCd:
With High Cap. NiMH:
12.8oz. (366gm)
26.81oz. (759gm)
29.95oz. (849gm)
26.3oz. (746gm)
Specifications subject to change without notice.
v
SPECIFICATIONS FOR 800MHz RADIOS
All specifications are per Electronic Industries Association (EIA) 316B unless otherwise noted.
GENERAL
FCC Designation:
Temperature Range:
Operating:
Storage:
RECEIVER
AZ489FT5750
Frequency Range:
Bandwidth:
–30°C to +60°C
–40°C to +85°C
Power Supply: Nickel-Cadmium Battery (NiCd)
or Nickel-Metal-Hydride Battery (NiMH)
TRANSMITTER
851–870MHz
19MHz
RF Power:
Frequency Range:
3 Watts
806–825MHz
851–870MHz
Quieting Sensitivity (20dBQ):
0.5µV Max.
Frequency Stability
(–30 to +60°C; 25°C ref.):
Usable Sensitivity
(12dB SINAD):
0.35µV Max.
Intermodulation:
–70dB
± .00015%
Emission (Conducted and Radiated):
Battery Voltage:
Nominal:
Range:
7.5 Volts
6 to 9 Volts
FM Hum and Noise
Selectivity
(25kHz Adjacent Channel):
Recommended Battery:
Medium Capacity NiCd:
NTN4593**
or Ultra–High Capacity NiCd:
NTN4595**
or Medium Capacity NiMH:
NTN7014
or High Capacity NiMH:
NTN7251
Spurious Rejection:
(Companion Receiver):
–70dB
Frequency Stability
(–30+60°C; 25°C reference):
or Ultra-High Capacity FM:
*
NTN4538*/**
Rated Audio:
±.00015%
500mW
Distortion:
Groups D, F, and G
Distortion (At Rated Audio):
Channel Spacing:
3% Typical
25kHz
** FM Nonincendive: Class I, Division 2,
Groups A, B, C, and D
Dimensions (H x W x D)
Note: 2.64" = width at PTT; 2.94" = width at top
Less Battery:
5.20" x 2.64"/2.94"x 1.23"
(131.32mm x 67.05/74.67mm x 31.24mm)
With Medium Capacity NiCd Battery:
8.34" x 2.94" x 1.28"
(211.82mm x 74.67mm x 31.24mm)
With Ultra-High Capacity NiCd Battery:
9.10" x 2.94" x 1.23"
(231.12mm x 74.67mm x 31.24mm)
With High Capacity NiMH Battery:
8.34" x 2.94" x 1.23"
(211.82mm x 74.67mm x 31.24mm)
Weight: (w/Helical Antenna)
Less Battery:
With Medium Cap. NiCd :
With Ultra-High Cap. NiCd:
With High Cap. NiMH:
12.8oz. (366gm)
26.81oz. (759gm)
29.95oz. (849gm)
26.3oz. (746gm)
Specifications subject to change without notice.
vi
3% Typical
Modulation Limiting:
±5kHz
(821-824MHz):
±4kHz
Emissions Designators:
20K0F1E, 16K0F3E, 15K0F2D,
NTN4596*/**
FM Intrinsically Safe: Class I, II, III, Division 1,
–40dB
–70dB
Optional FM (Factory Mutual) Battery:
High Capacity FM:
–46dBw
15K0F1D, and 8K10F1E
SECTION I. INTRODUCTION
A. General
B. Radio Description
This manual includes all the information necessary
to maintain peak product performance and maximum
working-time using the board-replacement service
approach. This basic level of service (board-level) is
typical of some local service centers, self-maintained
customers, and some distributors. Included in this
manual are: radio specifications for each frequency
band; a general description of ASTRO™ Digital
SABER™ models; basic theory of operation; recommended test equipment, service aids, and tools; radio
alignment procedures; fundamental disassembly/
reassembly procedures; general maintenance recommendations; board-level troubleshooting information;
functional block diagram, connector information; and
an exploded view diagram with parts list of the ASTRO
Digital SABER portable radio. For details on the operation of the radio or component-level troubleshooting,
refer to the applicable manuals available separately.
To help you with your selection, a list is provided in
this manual, titled “Related Publications Available
Separately.”
The ASTRO Digital SABER radios are among the
most sophisticated two-way radios available. They are
available on VHF, UHF, and 800MHz bands.
Throughout the text in this publication, you will
notice the use of warnings, cautions, and notes. These
notations are used to emphasize that safety hazards
exist, and care must be taken and observed.
WARNING
An operational procedure, practice, or condition, etc., which may result in injury or death
if not carefully observed.
One of the newest in a long line of quality
Motorola products, the ASTRO Digital SABER radio
provides improved voice quality across more coverage
area. The digital process called “embedded signalling”
intermixes system signalling information with digital
voice, resulting in improved system reliability and the
capability of supporting a multitude of advanced features. Such features add up to better, more
cost-effective two-way radio communications.
ASTRO Digital SABER radios are available in
three basic models. Table 1 provides a description of
their basic features.
C.
TM
The ASTRO Digital SABER radio utilizes
Motorola’s revolutionary FLASHport technology.
FLASHport makes it possible to add software that
drives the radio’s capabilities both at the time of purchase and later on. Previously, changing a radio’s
features and capabilities meant significant modifications, or buying a new radio. But now, similar to how a
computer can be loaded with different software, the
radio’s features and capabilities can be upgraded with
FLASHport software.
CAUTION
An operational procedure, practice, or condition,
etc., which may result in damage to the equipment if not carefully observed.
NOTE
An operational procedure, practice, or condition,
etc., which is essential to emphasize.
Table 1. ASTRO Digital SABER Basic Features
Feature
Model I
Model II
Model III
Display
none
2 lines/
2 lines/
14 characters
14 characters
per line LCD
per line LCD
Keypad
none
3 x 2 button
3 x 6 button
Channel Capability
16/32
255
255
not available
available
available
not available
available
available
Dialing From
Prestored List
Programmable
Soft Keys
1
NOTES
2
SECTION II. BASIC MAINTENANCE
A. Introduction to This Section
This section of the manual describes preventive
maintenance, handling precautions, and some basic
repair procedures and techniques. Each of these topics provides information vital to the successful
operation and maintenance of your radio.
B. Preventive Maintenance
The ASTRO Digital SABER radios do not require
a scheduled preventive maintenance program; however, periodic visual inspection and cleaning is
recommended.
1. Inspection
Check that the external surfaces of the radio are
clean, and that all external controls and switches
are functional. A detailed inspection of the interior
electronic circuitry is not needed.
2. Cleaning
The following procedures describe the recommended cleaning agents and the methods to be
used when cleaning the external and internal surfaces of the radio. External surfaces include the
front cover, housing assembly, and battery case.
These surfaces should be cleaned whenever a
periodic visual inspection reveals the presence of
smudges, grease, and/or grime. Internal surfaces
should be cleaned only when the radio is disassembled for servicing or repair.
The only recommended agent for cleaning the
external radio surfaces is a 0.5% solution of a mild
dishwashing detergent, such as JOY®, in water.
The only factory recommended liquid for cleaning
the printed circuit boards and their components is
isopropyl alcohol (70% by volume).
CAUTION
The effects of certain chemicals and their
vapors can have harmful results on certain plastics. Aerosol sprays, tuner cleaners, and other
chemicals should be avoided.
a. Cleaning External Plastic Surfaces
(The detergent-water solution should be
applied sparingly with a stiff, non-metallic,
short-bristled brush to work all loose dirt away
from the radio. A soft, absorbent, lintless cloth
or tissue should be used to remove the solution and dry the radio. Make sure that no
water remains entrapped near the connectors,
cracks, or crevices.
b. Cleaning Internal Circuit Boards and
Components
Isopropyl alcohol may be applied with a stiff,
non-metallic, short-bristled brush to dislodge
embedded or caked materials located in hardto-reach areas. The brush stroke should direct
the dislodged material out and away from the
inside of the radio.
Alcohol is a high-wetting liquid and can carry
contamination into unwanted places if an
excessive quantity is used. Make sure that
controls or tunable components are not
soaked with the liquid. Do not use high-pressure air to hasten the drying process, since
this could cause the liquid to puddle and collect in unwanted places.
Upon completion of the cleaning process, use
a soft, absorbent, lintless cloth to dry the area.
Do not brush or apply any isopropyl alcohol to
the frame, front cover, or back cover.
NOTE
Always use a fresh supply of alcohol and a
clean container to prevent contamination by
dissolved material (from previous usage).
C. Handling Precautions
Complementary metal-oxide semiconductor
(CMOS) devices, and other high-technology devices,
are used in this family of radios. While the attributes of
these devices are many, their characteristics make
them susceptible to damage by electrostatic discharge
(ESD) or high-voltage charges. Damage can be latent,
resulting in failures occurring weeks or months later.
Therefore, special precautions must be taken to
prevent device damage during disassembly, troubleshooting, and repair. Handling precautions are
mandatory for this radio, and are especially important
in low-humidity conditions. DO NOT attempt to disassemble the radio without observing the following
handling precautions.
1. Eliminate static generators (plastics, Styrofoam,
etc.) in the work area.
2. Remove nylon or double-knit polyester jackets, roll
up long sleeves, and remove or tie back loose
hanging neckties.
3. Store and transport all static-sensitive devices in
ESD-protective containers.
4. Disconnect all power from the unit before ESDsensitive components are removed or inserted
unless otherwise noted.
3
5. Use a static-safeguarded workstation, which can
be accomplished through the use of an anti-static
kit (Motorola part number 01-80386A82). This kit
includes a wrist strap, two ground cords, a staticcontrol table mat and a static-control floor mat. For
additional information, refer to Service and Repair
Note SRN-F1052, “Static Control Equipment for
Servicing ESD Sensitive Products,” available from
Literature Distribution.
Motorola
Literature Distribution
2290 Hammond Drive
Schaumburg, IL 60173
(708) 576-2826
4
When these items are not readily available,
observing the following techniques will minimize
chance of damage.
•
If a static-sensitive device is to be temporarily
set down, use a conductive surface for placement of the device.
•
Make skin contact with a conductive work surface first and maintain this contact when the
device is set down or picked up.
6. Always wear a conductive wrist strap when servicing this equipment. The Motorola part number for
a replacement wrist strap that connects to the
table mat is 42-80385A59.
SECTION III. RECOMMENDED TEST EQUIPMENT,
SERVICE AIDS, AND TOOLS
A. Recommended Test Equipment
The list of equipment contained in Table 2 includes
all of the standard test equipment required for servicing two-way portable radios, as well as several unique
items designed specifically for servicing this family of
radios. The “Characteristics” column is included so
that equivalent equipment may be substituted; however, when no information is provided in this column, the
specific Motorola model listed is either a unique item
or no substitution is recommended.
Table 2. Recommended Test Equipment
Motorola
Model Number
Description
Characteristics
Application
R2600
System Analyzer
This monitor will substitute
for items with an asterisk (*).
Frequency/deviation meter and signal
generator for wide-range
troubleshooting and alignment
R1049A*
Digital Multimeter
R1150C*
Code Synthesizer
S1053D*
SKN6008A*
SKN6001A*
AC Voltmeter
Power Cable for Meter
Test Leads for Meter
1mV to 300V, 10-Megohm
input impedance
R1094A
Dual-Trace
Oscilloscope
20MHz bandwidth
5mV to 5V/division
Waveform measurements
S1350C*
ST1213B (VHF)*
ST1223B (UHF)*
Wattmeter
Plug-In Element
RF Dummy Load
50-ohm, ±5% accuracy
10 watts, maximum
0-1000MHz, 300W
Transmitter power output
measurements
Recommended for ac/dc voltage
and current measurements
Injection of audio and digital
signalling codes
Audio voltage measurements
R1065
Load Resistor
10-watt Broadband
For use with wattmeter
S1339A
RF Millivolt Meter
100µV to 3V RF
10kHz to 1.2GHz
RF-level measurements
R1013A*
SINAD Meter
S1347D or
S1348D (programmable)
DC Power Supply
Receiver sensitivity
measurements
0-20Vdc, 0-5 Amps
current limited
Bench supply for 7.5Vdc
* Any of the R2600 series system analyzers will substitute for items with an asterisk (*).
5
B. Service Aids and Recommended Tools
Refer to the following tables, “Service Aids for
Board-Level Troubleshooting” and “Recommended
Test Tools for Board-Level Troubleshooting,” for a listing and description of the service aids and tools
designed specifically for servicing this family of radios,
as well as the more common tools required to disassemble and properly maintain the radio. These kits
and/or parts are available from the Motorola Parts
Division offices listed in the “Replacement Parts
Ordering” section located on the inside back cover of
this manual.
The following table lists service aids recommended for working on this family of radios. While all of
these items are available from Motorola, most are
standard shop equipment items, and any equivalent
item capable of the same performance may be substituted for the item listed.
C. Field Programming Equipment
This family of radios can be aligned and programmed in the field. This requires specific equipment
and special instructions. Refer to the applicable “Radio
Service Software User's Guide” for complete field
programming information.
Table 3. Service Aids for Board-Level Troubleshooting
Motorola Part Number
RKN-4046A
RTL-4224A
REX-4200A
(contains REN-4014A
and REN-4011A)
RTX-4005B or both
RTX-4005A and RPX-4665A
Field Modification Kit
RLN-4008B
01-80357A57
01-80358A56
30-80369B71
or
30-80369B72
RVN-4100A
58-80348B33
Description
RIB/Radio/Test Set Cable
Battery Eliminator
Housing Eliminator/
Test Fixture
Portable Test Set
Radio Interface Box
Wall-Mounted Power Supply
Wall-Mounted Power Supply
Computer Interface Cable
Radio Service Software
SMA to BNC Adaptor
Application
Connects radio to RTX-4005B Test Box and RIB.
Interconnects radio to power supply.
Provides for troubleshooting of the radio when the housing
is removed. If you have REN-4011A or the
REX-4194A (SABER SITM Housing Eliminator), order REN-4014A only.
Enables connection to the universal connector.
Allows switching for radio testing.
Enables communications between the radio and the
computer's serial communications adapter.
Used to supply power to the RIB (120 Vac).
Used to supply power to the RIB (220 Vac).
Use B72 for the IBM PC AT. All other IBM models use B71.
Connects the computer's serial communications adaptor
to the RIB.
Software on 3-1/2 in. and 5-1/4 in. floppy disks.
Adapts radio’s antenna port to BNC cabling of test equipment.
Table 4. Recommended Tools for Board-Level Troubleshooting
Motorola Part Number
01-80386A82
RSX-4043A
66-80370B89
66-80321B86
66-80321B79
66-80371B03
66-80371B34
6
Description
Application
Anti-Static
Grounding Kit
Roto-Torq Adjustable
Torque Screwdriver
Slotted-Spanner
Nut Bit
#0 Phillips Bit
#1 Phillips Bit
Spanner Nut Bit
Spanner Nut Bit
Used during radio assembly and disassembly procedures.
Used during radio assembly and disassembly procedures.
Used during radio assembly and disassembly procedures.
Used during radio assembly and disassembly procedures.
Used during radio assembly and disassembly procedures.
Used during radio assembly and disassembly procedures.
Used during radio assembly and disassembly procedures.
SECTION IV. PERFORMANCE CHECKS
A. Introduction to This Section
This section covers performance checks used to
verify the radio meets published specifications. The
recommended test equipment listed in the previous
section approaches the accuracy of the manufacturing equipment, with a few exceptions. Accuracy of the
equipment must be maintained in compliance with the
manufacturer’s recommended calibration schedule.
b. Within 10 seconds after the “Self Test” is
complete, press side button 3 five times in
succession.
c.
After “RF TEST” appears, press the top programmable button (normally programmed as
the emergency button) once. “1 CSQ”
appears, indicating: test frequency 1, carrier
squelch mode.
d. Each additional press of side button 3 will
advance to the next test channel. (Refer to
Table 7.)
B. Setup
Supply voltage can be connected from the battery
eliminator. The equipment required for alignment procedures is connected as shown in the “Radio
Alignment Test Setup” diagram.
e. Pressing side button 2 will scroll through
and access test environments as shown in
Table 6.
Initial equipment control settings should be as
indicated in the following table, and should hold for all
alignment procedures except as noted in Table 5.
Transmit into a load when keying a radio
under test.
NOTE
Table 5. Initial Equipment Control Settings
System Analyzer
Test Set
Power Supply
Table 6. Test Environments
Display
Description
Function
Monitor Mode: Pwr Mon
Spkr set: A
Voltage: 7.5Vdc
CSQ
Carrier Squelch
RF Attn: –70dB
Spkr/load:
Speaker
PTT: OFF
(center)
DC on/standby:
Standby
Volt Range: 10Vdc
RX:unsquelch if carrier detected
TX: mic audio
TPL
Tone
Private-Line
RX:unsquelch if carrier and tone
(192.8 Hz) detected
TX: mic audio + tone (192.8 Hz)
AST
ASTRO
RX:none
TX: 1200Hz tone *
AM, CW, FM: FM
O'scope Source: Mod
O'scope Horiz: 10mSec/Div
O'scope Vert: 2.5kHz/Div
O'scope Trig: Auto
Monitor Image: Hi
Monitor BW: Nar
Monitor Squelch: mid CW
Monitor Vol: 1/4 CW
Current: 2.5Amps
* All deviation values are based on deviation tuning of this mode.
2. Control Top and Keypad Test Mode
C. Test Mode
1. RF Test Mode
When the ASTRO Digital SABER radio is operating in its normal environment, the radio's
microcomputer controls the RF channel selection,
transmitter key-up, and receiver muting. However, when the unit is on the bench for testing,
alignment, or repair, it is removed from its normal
environment. It cannot receive commands from
its system and, therefore, the internal microcomputer will not key the transmitter nor unmute the
receiver. This prevents the use of normal tune-up
procedures. To solve this problem a special routine, called TEST MODE or “air test,” has been
incorporated in the radio.
To enter the test mode:
a. Turn the radio on and adjust the volume for a
comfortable llistening level. The volume level
remains constant once in the test mode.
To check the display, the buttons, and the switches, perform the following tests:
a. Turn the radio on and adjust the volume for a
comfortable llistening level. The volume level
remains constant once in the test mode.
b. Within 10 seconds after the “Self Test” is
complete, press side button 3 five times in
succession.
c.
After “RF TEST” appears on the display,
press side button 1 once, “CH TEST”
(14-character radio) appears on the display.
d. Next, press and hold the top programmable
button; all segments on the display will light,
and the LED on the control top will illuminate
a red color.
e. Release the top programmable button; “3/0”
appears, which indicates that the top programmable button is in the open condition.
7
f.
Press the top programmable button again;
“3/1” appears, which indicates that the
top programmable button is in the closed
condition.
•
Press 4, “52/1” appears; release, “52/0”
appears.
•
Press 5, “53/1” appears; release, “53/0”
appears.
g. Rotate the mode/zone selector switch; “4/0”
through “4/15” appears, which indicates that
the selector switch is in mode/zone position
1 through 15.
•
Press 6, “54/1” appears; release, “54/0”
appears.
•
Press 7, “55/1” appears; release, “55/0”
appears.
•
Press 8, “56/1” appears; release, “56/0”
appears.
•
Press 9, “57/1” appears; release, “57/0”
appears.
h. Rotate the two-position (A/B) switch; “65/0”
and “65/1” appears.
i.
Rotate the two-position programmable switch
(concentric with the top programmable button); “67/3” and “67/0” appear.
j.
Rotate the volume control; “2/0” through
“2/255” appear.
•
Press *, “58/1” appears; release, “58/0”
appears.
k.
Press side button 1, “96/1” appears; release,
“96/0” appears.
•
Press #, “59/1” appears; release, “59/0”
appears.
l.
Press side button 2, “97/1”appears; release,
“97/0” appears.
•
Press
, “128/1” appears; release,
“128/0” appears.
m. Press side button 3, “98/1”appears; release,
“98/0” appears.
•
Press HOME, “129/1” appears; release,
“129/0” appears.
n. Press the PTT switch, “1/1” appears; release,
“1/0” appears.
•
Press
appears.
Keypad Checks:
•
Press the left-hand • key on the top row of
keys, “131/1” appears; release, “131/0”
appears.
, “130/1” appears; release, “130/0”
•
Press 0, “48/1” appears; release, “48/0”
appears.
•
Press 1, “49/1” appears; release, “49/0”
appears.
•
Press the center • key, “132/1” appears;
release, “132/0” appears.
•
Press 2, “50/1” appears; release, “50/0”
appears.
•
Press the right-hand • key, “133/1” appears;
release, “133/0” appears.
•
Press 3, “51/1” appears; release, “51/0”
appears.
Table 7. Test Frequencies
Test Channel
8
VHF
UHF Band 1
UHF Band 2
800MHz
TX #1
136.025
403.100
450.025
806.0125
RX #1
136.075
403.150
450.075
851.0625
TX #2
142.125
424.850
465.225
815.0125
RX #2
142.075
424.900
465.275
860.0625
TX #3
154.225
438.050
475.225
824.9875
RX #3
154.275
438.100
475.275
869.9375
TX #4
160.125
444.050
484.975
851.0125
RX #4
160.175
444.100
485.025
851.0625
TX #5
168.075
456.350
500.275
860.0125
RX #5
168.125
456.400
500.225
860.0625
TX #6
173.975
463.700
511.975
869.9875
RX #6
173.925
463.750
511.925
869.9375
TX #7
177.975
469.650
519.975
None
RX #7
177.925
469.700
519.925
None
Table 8. Receiver Performance Checks
Test
Name
System
Analyzer
Radio
Test Set
Comments
Frequency error to be ≤ ±600Hz
Reference
Frequency
Mode: PWR MON
4th channel test frequency❖
Monitor: Frequency error
Input at RF In/Out
TEST MODE,
4 CSQ
output at
antenna
PTT to continuous
(during the
performance check)
Rated Audio
Mode: GEN
Output level: 1.0mV RF
4th channel test frequency❖
Mod: 1kHz tone at
3kHz deviation
Monitor: DVM: ac Volts
TEST MODE,
4 CSQ
PTT to OFF (center), Set volume control to
meter selector to
3.74Vrms
Audio PA
Distortion
As above, except to
distortion
As above
As above
Distortion < 3.0%
Sensitivity
(SINAD)
As above, except SINAD,
lower the RF level for 12dB
SINAD
As above
PTT to OFF (center)
RF input to be < 0.35µV
Noise Squelch
Threshold
(only radios with
conventional
system need
to be tested)
RF level set to 1mV RF
As above
PTT to OFF (center), Set volume control to
meter selection to
3.74Vrms
Audio PA, spkr/load
to speaker
As above, except change
frequency to a conventional
system. Raise RF level from
zero until radio unsquelches.
Out of TEST
MODE; select a
conventional
system
As above
❖
Name
Unsquelch to occur at < 0.25µV
Preferred SINAD = 8-10dB
(See Table 7.)
9
Table 9. Transmitter Performance Checks
Test
Name
System
Analyzer
Radio
Test Set
Comments
Name
Reference
Frequency
Mode: PWR MON
4th channel test frequency❖
Monitor: Frequency error
Input at RF In/Out
TEST MODE,
4 CSQ
PTT to continuous
(during the
performance check).
Frequency error to be ≤ ±600Hz.
Power RF
As above
As above, 4 CSQ
As above
Refer to Maintenance Specifications page in front of manual.
Voice
Modulation
Mode: PWR MON
4th channel test frequency❖
atten to –70, input to RF In/Out,
Monitor: DVM, ac Volts
Set 1kHz Mod Out level for
0.025Vrms at test set,
80mVrms at ac/dc test set jack
As above, 4 CSQ
As above, meter
selector to mic
Deviation:
VHF, UHF, and 800MHz:
≥ 3.6kHz but ≤ 5.0kHz
Voice
Modulation
(internal)
Mode: PWR MON
4th channel test frequency❖
atten to –70, input to RF In/Out
TEST MODE,
4 CSQ,
output at antenna
Remove modulation
input
Press PTT switch on radio.
Say “four” loudly into the
radio mic. Measure deviation:
VHF, UHF, and 800MHz:
≥ 3.8kHz but ≤ 5.0kHz
PL
Modulation
(radios with
conventional,
clear mode,
coded squelch
operation only)
Change frequency to a
conventional transmit
frequency, BW to narrow
Conventional coded
squelch personality
(clear mode
operation)
4 TPL
As above
Deviation:
VHF, UHF, and 800MHz:
≥ 500Hz but ≤ 1000Hz
Talkaround
Modulation
(radios with
conventional,
clear mode,
talk-around
operation only)
Change frequency to conventional talk-around frequency.
Mode: PWR MON
deviation, attenuation to –70,
input to RF In/Out
Monitor: DVM, ac volts
Set 1kHz Mod Out level for
25mVrms at test set.
Conventional
talk-around
personality
(clear mode
operation)
1 CSQ
As above
Deviation:
UHF and 800MHz: ≥ 3.8kHz
but ≤ 5.0kHz
Talkaround
Modulation
(radios with
conventional,
secure mode,
talk-around
operation only)
(**)
Change frequency to conventional talk-around frequency.
Mode: PWR MON
deviation, attenuation to –70,
input to RF In/Out
Monitor: DVM, ac volts
Mod: 1kHz out level for
25mVrms at test set.
Conventional
talk-around
personality
(secure mode
operation)
Load key into
radio
1 sec.
As above
Deviation:
UHF and 800MHz: ≥ 3.6kHz
but ≤ 4.4kHz
* 800MHz radios only
** The secure mode, talkaround modulation test is only required for trac mode radios which do not have clear mode talkaround capability.
❖
See Table 7.
10
SECTION V. RADIO ALIGNMENT PROCEDURE
A. Introduction to This Section
B. General
This section describes both receiver and transmitter radio alignment procedures.
An IBM personal computer (PC) and radio service
software (RSS) are required to align the radio. Refer
to the applicable RSS manual for installation and
setup procedures for the software. To perform the
alignment procedures, the radio must be connected to
the PC, radio interface box (RIB), and a universal test
set as shown in Figure 1.
30 dB PAD
SYSTEM ANALYZER
OR COUNTER
30 dB PAD
WATTMETER
TRANSMIT
BNC
RF GENERATOR
SMA-BNC
58-80348B33
RECEIVE
SET TO APPROX. 450mV FOR Tx
BATTERY
ELIMINATOR
RTL-4224A
AUDIO IN TX
TEST SET
RTX-4005B
RADIO
PROGRAM/TEST CABLE
RKN-4046A
RX
AUDIO GENERATOR
SINAD METER
AC VOLTMETER
MEASURE 80mV FOR Tx
COMPUTER
DATA
BUSY
GND
RIB
RLN-4008B
MAEPF-23413-O
RIB POWER SUPPLY
01-80357A57 (120V)
COMPUTER INTERFACE
CABLE
30-80369B71
30-80369B72 (IBM "AT" ONLY)
Figure 1. Radio Alignment Test Setup
11
All service and tuning procedures are performed
from the SERVICE menu, which is selected by pressing F2 from the MAIN MENU. Figure 2 illustrates how
the RSS alignment SERVICE screens are organized.
The SERVICE screens introduce the concept of
the “softpot,” an analog SOFTware controlled POTentiometer used for adjusting all transceiver alignment
controls.
Each SERVICE screen provides the capability to
increase or decrease the ‘softpot’ value with the
keyboard UP/DOWN arrow keys respectively. A
graphical scale is displayed indicating the minimum,
maximum, and proposed value of the softpot, as
shown in Figure 3.
SERVICE
F2 - TRANSMITTER ALIGNMENT MENU
0
15
F1 - HELP
F2 - REFERENCE OSCILLATOR ALIGNMENT
F3 - TRANSMIT POWER ALIGNMENT
F4 - TRANSMIT DEVIATION BALANCE
(COMPENSATION) ALIGNMENT
Min.
Value
Max.
Value
MAEPF-22858-O
MAEPF 22858 O
Figure 3. Softpot Concept
F5 - TRANSMIT DEVIATION LIMIT ALIGNMENT
F10 - EXIT, RETURN TO SERVICE MENU
F3 - RECEIVER ALIGNMENT MENU
F2 - FRONT END BANDPASS FILTER ALIGNMENT
MAEPF-23414-O
Figure 2. RSS Service Menu Layout
All SERVICE screens read and program the radio
codeplug directly; you do NOT have to use the RSS
GET/SAVE functions to use the SERVICE menus.
CAUTION
Do NOT switch radios in the middle of any SERVICE procedure. Always use the EXIT key to
return to the MAIN menu screen before disconnecting the radio. Improper exits from the
SERVICE screens may leave the radio in an
improperly configured state and result in seriously degraded radio or system performance.
12
Adjusting the softpot value sends information to
the radio to increase (or decrease) a dc voltage in the
corresponding circuit. For example, pressing the UP
arrow key at the Reference Oscillator screen instructs
the radio’s microcomputer to increase the voltage
across a varactor in the reference oscillator, which
increases the frequency.
In ALL cases, the softpot value is just a relative
number corresponding to a digital-to-analog (D/A)
generated voltage in the radio.
Perform the following procedures in the
sequence indicated.
NOTE
Some of the following screens may vary depending
upon the radio under test and the version of radio
service software you are using. Refer to your radio
service software user’s guide.
3. Press Tab (or Enter or Return) to select a frequency field (starting with the highest frequency
shown). Then, press F6 to key the radio. The
screen will indicate that the radio is transmitting.
4. Measure the transmit frequency on your service
monitor.
5. Use the UP/DOWN arrow keys to adjust the reference oscillator softpot value. See Table 10.
C. Reference Oscillator Alignment
6. Press F6 again to dekey the radio.
Adjustment of the reference oscillator is critical for
proper radio operation. Improper adjustment will result
not only in poor operation, but also in a misaligned
radio that will interfere with other users operating on
adjacent channels. For this reason, the reference
oscillator should be checked every time the radio is
serviced. The frequency counter used for this procedure must have a stability of 0.1 ppm (or better).
7. Press F8 to program the new softpot value.
8. Repeat steps 3-7 for the remaining frequencies.
9. Press F10 once to return to the TRANSMITTER
ALIGNMENT MENU, or press F10 twice to return
to the SERVICE MENU.
1. From the SERVICE MENU, press F2 to select the
TRANSMITTER ALIGNMENT MENU.
2. Press F2 again to select the REFERENCE
OSCILLATOR alignment screen. See Figure 4.
MOTOROLA Radio Service Software
ASTRO
Model: H04UCH9PW7AN
Use UP/DOWN Arrows To Adjust Softpot.
MAIN:SERVICE:TX ALIGN:REF OSC
REFERENCE OSCILLATOR
Frequency
Current Value
869.9875
150
New Softpot Value ....................150
Transmitter........On
0
Min
F1
HELP
255
Max
F2
F3
F4
F5
F6
TOGGLE
PTT
F7
F8
PROGRAM
VALUE
F9
F10
EXIT
Figure 4. Reference Oscillator Alignment Screen
Table 10. Reference Oscillator Alignment
Band
Target
VHF
±150Hz
UHF
±150Hz
800MHz
±150Hz
13
D. Transmit Power Alignment
3. Press Tab (or Enter or Return) to select a frequency field (starting with the highest frequency
shown). Then, press F6 to key the radio. The
screen will indicate that the radio is transmitting.
NOTE
•
All power measurements are to be made at the
antenna port.
•
The transmitter power setting keeps the radiated power at or below the level specified in the
exclusionary clause for low power devices of
IEEE Standard C95.1-1991.
4. Use the UP/DOWN arrow keys to adjust the transmit power per the values shown in Table 11.
5. Press F6 to dekey the radio.
1. From the SERVICE MENU, press F2 to select the
TRANSMITTER ALIGNMENT MENU.
2. Press F3 to select the TRANSMIT POWER alignment screen. The screen will indicate the transmit
frequencies to be used. See Figure 5.
6. Press F8 to program the value.
7. Repeat steps 3-6 for the remaining frequencies.
8. Press F10 once to return to the TRANSMITTER
ALIGNMENT MENU, or press F10 twice to return
to the SERVICE MENU.
Use UP/DOWN Arrows To Adjust Softpot.
MOTOROLA Radio Service Software
ASTRO
Model: H04UCH9PW7AN
MAIN:SERVICE:TX ALIGN:TX POWER
TRANSMIT POWER
Frequency
806.00000
815.00000
824.00000
851.00000
860.00000
869.00000
Current Value
High Pwr Low Pwr
35
35
42
42
50
50
60
60
70
70
80
80
New Softpot Value
High Pwr Low Pwr
10
23
11
28
20
33
33
40
43
45
58
58
Transmitter..........On
0
Min
F1
HELP
127
Max
F2
F3
F4
F5
F6
TOGGLE
PTT
F7
F8
PROGRAM
VALUE
F9
Figure 5. Transmit Power Alignment Screen
Table 11. Transmit Power Setting
Test Frequencies
VHF Power Level
136-174MHz
174-178MHz
1W
1.2 -1.4
1.2 - 1.4
5W
5.2 - 5.4
4.2 - 4.4
UHF Power Level
450-512MHz
512-520MHz
1W
1.2 -1.4
1.2 - 1.4
4W
4.2 - 4.4
3.2 - 3.4
Test Frequencies
800MHz Power Level
3W
14
All Test Frequencies
3.2 -3.4
F10
EXIT
E. Transmit Deviation Balance
(Compensation) Alignment
Compensation alignment balances the modulation
sensitivity of the VCO and reference modulation (synthesizer low-frequency port) lines. The compensation
algorithm is critical to the operation of signalling
schemes that have very-low-frequency components
(for example, DPL) and could result in distorted waveforms if improperly adjusted.
1. From the SERVICE MENU, press F2 to select the
TRANSMITTER ALIGNMENT MENU.
4. Press F4. This will cause the radio to key and the
radio’s DSP IC to inject an 80Hz tone into the RF
board.
5. Measure the deviation and record this value.
6. Press F4 to dekey the radio.
7. Press F6. This will cause the radio’s DSP IC to
change the injection tone to 3kHz, 100mVrms.
Use the UP/DOWN arrow keys to adjust the deviation to within ±2% of the value recorded in step 5.
8. Repeat steps 4-7 until the 3kHz tone deviation is
within ±2% of the 80Hz tone deviation.
2. Press F4 to select the TRANSMIT DEVIATION
BALANCE (COMPENSATION) alignment screen.
The screen will indicate the transmit frequencies
to be used. See Figure 6.
10. Press F8 to program the new softpot value.
3. Press Tab (or Enter or Return) to select a frequency field (starting with the lowest frequency
shown).
12. Press F10 once to return to the TRANSMITTER
ALIGNMENT MENU, or press F10 twice to return
to the SERVICE MENU.
MOTOROLA Radio Service Software
ASTRO
Model: H04UCH9PW7AN
9. Press F6 again to dekey the radio.
11. Repeat steps 3-10 for the remaining frequencies.
Use UP/DOWN Arrows To Adjust Softpot.
MAIN:SERVICE:TX ALIGN:BAL ATTN
TRANSMIT DEVIATION BALANCE (COMPENSATION)
Current
Value
30
30
30
45
45
45
Frequency
450.62500
465.22500
475.22500
484.97500
500.27500
511.97500
New Softpot Value
30
30
30
45
45
45
Transmitter ..............Off
0
Min
F1
HELP
63
Max
F2
F3
F4
TOGGLE LOW
TONE PTT
F5
F6
TOGGLE HIGH
TONE PTT
F7
F8
PROGRAM
VALUE
F9
F10
EXIT
Figure 6. Transmit Deviation Balance (Compensation) Alignment Screen
15
F. Transmit Deviation Limit Alignment
IMPORTANT NOTE
Put the radio in the RF test mode and scroll to the
ASTRO test environment, indicated by “AST” on
the display (refer to the "Performance Checks" section for details). All other deviation values are
derived from the ASTRO test environment mode
transmit deviation limit.
3. Press Tab (or Enter or Return) to select a frequency field (starting with the lowest frequency
shown).
4. Press F6 to key the radio. Then use the
UP/DOWN arrow keys to adjust for a deviation per
the values shown in Table 12.
5. Press F6 again to dekey the radio.
1. From the SERVICE MENU, press F2 to select the
TRANSMITTER ALIGNMENT MENU.
6. Press F8 to program the softpot value.
2. Press F5 to select the TRANSMIT DEVIATION
LIMIT alignment screen. The screen will indicate
the transmit frequencies to be used. See Figure 7.
8. Press F10 once to return to the TRANSMITTER
ALIGNMENT MENU, or press F10 twice to return
to the SERVICE MENU.
MOTOROLA Radio Service Software
ASTRO
Model: H04UCH9PW7AN
7. Repeat steps 3-6 for the remaining frequencies.
Use UP/DOWN Arrows To Adjust Softpot.
MAIN:SERVICE:TX ALIGN:VCO ATTN
TRANSMIT DEVIATION LIMIT
Frequency
Current
Value
450.02500
465.22500
475.22500
484.97500
500.27500
511.97500
175
175
180
180
180
180
New Softpot Value
175
175
180
180
180
180
Transmitter ..............Off
0
Min
F1
HELP
255
Min
F2
F3
F4
F5
F6
TOGGLE
PTT
F7
F8
PROGRAM
VALUE
Figure 7. Transmit Deviation Limit Alignment Screen
Table 12. Transmit Deviation Limit
16
Band
Deviation (Hz)
VHF
2785-2885
UHF
2785-2885
800MHz
2785-2885
F9
F10
EXIT
4. Set the RF test generator to the first receive
frequency +150Hz. Set the RF level at the
radio standard antenna port to 4.0µV with no
modulation.
G. Front-End Filter Alignment (VHF/UHF Only)
NOTE
This procedure is only required for tuning the frontend filter varactors in the VHF and UHF models.
The 800MHz models utilize a fixed front-end filter.
1. From the SERVICE MENU, press F3 to select the
RECEIVER ALIGNMENT MENU.
2. Press F2 to select the FRONT END FILTER
ALIGNMENT screen. The screen will indicate the
receive frequencies at which the filter is to be
aligned. See Figure 8.
3. Press Tab (or Enter or Return) to select a frequency field.
MOTOROLA Radio Service Software
ASTRO
Model: H04UCH9PW7AN
5. Adjust the UP/DOWN arrow keys to obtain a peak
value in the RSSI (receive signal strength indicator) field. Note F4 must be pressed to obtain each
RSSI reading after adjustment.
6. Press F8 to program the new softpot value.
7. Repeat steps 3-6 for the remaining frequencies.
8. Press F10 once to return to the RECEIVER
ALIGNMENT MENU, or press F10 twice to return
to the SERVICE MENU.
Use UP/DOWN Arrows To Adjust Softpot.
MAIN:SERVICE:RX ALIGN:FE FL
FRONT END FILTER ALIGNMENT
Frequency
450.02500
465.22500
475.22500
484.97500
500.27500
511.97500
519.97500
Current
Value
New Softpot Value
0
0
0
0
0
0
0
0
0
0
0
0
0
0
RSSI. . . .0
0
Min
F1
HELP
255
Max
F2
F3
F4
READ
RSSI
F6
F5
F7
F8
PROGRAM
VALUE
F9
F10
EXIT
Figure 8. Front-End Filter Alignment Screen
17
NOTES
18
SECTION VI. DISASSEMBLY/REASSEMBLY PROCEDURES
3.
CAUTION
Before attempting any disassembly or reassembly of the radio, observe the handling
precautions described in the “Basic Maintenance” section of this manual.
Loosen the two slotted-spanner nuts on the
bottom of the radio using the ROTO-TORQ
adjustable torque screwdriver with bit No.
66-80370B89. When loosened, the slotted-spanner nuts are captive and will spin freely without
separating from the baseplate.
A. Disassembly
DESCRIPTION
SYSTEM ASTRO DIGITAL SABER
UHF LOOSEN SPANNER NUTS
(Refer to the following diagrams and the exploded
view diagram located in the back of this manual.)
LETTERING SIZE:
REQUIRES:
ON/OFF/VOLUME
CONTROL
DATE
EH
11/10/92
EDITOR
DATE
JWB
11/20/92
O
MAEPF-23373-O created
1. Turn off the radio by rotating the on/off/volume
control fully counterclockwise until you hear a
click. Remove the accessory connector cover or
any accessory connected to the radio before
beginning disassembly.
ILLUSTRATOR
MA
DRAWN: A
ISS
RE
66-80370B89
SLOTTED-SPANNER NUT BIT
EN
CH
LETTERING
REQUIRES
SLOTTED-SPANNER
NUTS
A
B
MAEPF-23373-O
RSX-4043A
ROTO-TORQ ADJUSTABLE
TORQUE SCREWDRIVER
MAEPF-23373-O
4.
Remove the chassis from the radio housing by
grasping the antenna at its base and pulling it
gently upward. Do not depress the PTT switch
during removal and do not push on the slottedspanner nuts to remove the chassis.
LETTERING SIZ
REQUIRES:
MAEPF-23372-O
2. Remove the battery from the baseplate on the
bottom of the radio housing by pushing the springloaded battery latch toward the top of the radio,
and sliding the battery away from the latch until it
clears the baseplate.
BATTERY
MAEPF-23374-O
BASE OF
ANTENNA
REMOVAL
DIRECTION
BASEPLATE
BATTERY
LATCH
INSERTION
DIRECTION
MAEPF-20185-O
19
5. Gently push the center bottom edge of the front
shield assembly and lift it away from the bottom
of the chassis. If necessary, use a small slotted
screwdriver to disengage the two retaining clips
near the bottom outer edges. Next, pull the front
shield assembly out from under the plastic top
panel. Be careful not to pull against the flexible circuits connecting to the controller board.
7. Using a ROTO-TORQ adjustable screwdriver tool
with a Phillips bit #0 point size (Motorola part number 66-80321B86), remove the four controller
shield screws. Next, gently pry the controller
shield up and out of the chassis by inserting the
tip of a thin slotted screwdriver between the chassis and the controller shield at each of the three
thin-walled chassis points (see diagram below).
FRONT SHIELD
ASSEMBLY
TOP PANEL
CAUTION
To avoid damage to the control top/PTT flexible
circuit, DO NOT insert the screwdriver tip near
the flexible circuit connector or the dual-function
switch. Insert the tip of the slotted screwdriver
only at the thin-walled chassis points shown
below.
CHASSIS
CASTING THIN
WALL POINTS (3)
CHASSIS
ASSEMBLY
MAEPF-23375-O
6. Disconnect the display flexible circuit (Models II
and III only) and the speaker/microphone flexible circuit from the controller board by pulling the
respective connector plugs out and away from the
controller board and shield assembly. The connector plugs are covered with a protective rubberized
pad. Also, disconnect the control top/PTT flexible circuit from the controller board by pulling up
and rotating the flex connector plug out and away
from the controller board and shield assembly.
The connector plug is covered with a protective
rubberized pad.
DISPLAY FLEXIBLE CIRCUIT
CONNECTOR PLUG (MODELS II AND III)
SPEAKER/MICROPHONE
FLEXIBLE CIRCUIT
CONNECTOR PLUG
MAEPF-23376-O
20
MAE
CONTROL TOP/ PTT
FLEXIBLE CIRCUIT
CONNECTOR PLUG
CONTROLLER
SHIELD
CONTROLLER
BOARD
(UNDER SHIELD)
66-80321B86
PHILLIPS BIT
15-PIN
CONNECTOR
(THIS END)
DUAL-FUNCTION
SWITCH HOUSING
CONTROLLER SHIELD
SCREWS (4)
MAEPF-23377-O
After the controller shield is freed, remove
the controller board from the chassis by gently
applying upward pressure on the black 15-pin
connector.
8. Remove the center shield from the chassis by
inserting a thin slotted screwdriver between each
of five center-shield release clips and the corresponding chassis-retaining tabs.
2. Housing Assembly
•
The housing assembly includes many parts
that are not replaceable or repairable.
•
The insulator on the universal connector can,
and should, be replaced if the old insulator
has been torn. When replacing the insulator
take care to keep it out of the main-seal
O-ring's seating area.
•
The PTT lever can be replaced by prying out
the old part with a soft plastic tool. The plastic
housing around the lever may be damaged if
a harder tool is used.
CAUTION
Use extreme caution to ensure that the release
clips are only deflected enough to disengage
the clip from the chassis. Too much pressure on
the clips could permanently damage the retaining feature.
CHASSIS WITH
RF BOARD ASSEMBLY
MAEPF-23378-O
3. Control Top Panel
CENTER SHIELD
RELEASE POINTS
(5)
The control top panel is fastened to the chassis by
the on/off/volume control, mode/zone selector
switch, programmable switch, and antenna switch;
it should be removed from the chassis only if
absolutely necessary.
4. Front Shield/Display Board Assembly
The ASTRO Digital SABER radio's display board
can be replaced, but the comments and cautions
in this manual must be strictly followed. To remove
the display board from the front shield assembly:
CENTER SHIELD
(UNDERNEATH)
MAEPF-23378-O
Once freed from the chassis at the five release
points, the center shield can be removed and the
RF board can be removed from the chassis.
CAUTION
The RF and ground contacts at the top of the RF
board are exposed when the board is removed
from the chassis. Special care must be taken to
avoid accidental damage to these contacts.
B. Servicing Major Subassemblies
a. ensure that all static safeguards are in effect;
b. turn the front shield/display board assembly
face down;
c.
d. push the LCD from its secured position
enough to grasp its edges, then pull firmly up
and out on the front shield/display board
assembly.
Refer to the exploded view diagram at the back of
this manual before attempting further disassembly or
repair.
CAUTION
Be very careful not to damage the keyswitch
overlay which is adhesively attached to the
LCD bezel.
1. Baseplate
•
•
All repairs to the baseplate assembly can, and
should, be made with the radio chassis inside
the radio.
After the slotted-spanner nuts are loosened,
the baseplate is held in place by the power
contact screw.
with slight upward pressure on the LCD bezel,
bend back each of the two plastic tabs that
hold the display board in place, and the bottom of the LCD will come loose;
5. Chassis
If you must lift or remove the control top/PTT flexible circuit for any reason, do not re-adhere it to the
chassis; the flexible circuit must be replaced.
6. Dual-Function Switch and Actuator Assembly
•
The retainers holding the slotted-spanner nuts
in place are not reusable. Replacement of the
retainers requires special insertion procedures; refer to the instruction sheet provided
with the slotted-spanner nut kit.
•
Before removing the switch, remove the knob
by gently separating the two arms of the
switch bracket (located between the switch
and the main O-ring seal) and pulling upward
on the knob.
•
The "O-ring" portion of the elastomer seal
must be fully seated on the threaded bushing
before the baseplate is reassembled (the
bushing is part of the housing assembly).
•
Before re-inserting the knob, ensure that the
slot in the switch is properly aligned with the
blade on the knob's shaft.
21
•
When the knob is properly inserted, the arms
of the switch bracket will snap into position
(approximately 0.2 inches apart), the knob will
not be loose in the switch bracket, and the
bracket will hold the switch firmly against the
inside of the top control panel. If this is not the
case, replace the switch bracket.
C. Reassembly
4. that when installed, the four controller shield
screws are torqued per specifications;
5. that the control top/PTT flex plug, speaker/microphone flex plug, and display flex plug have all
properly mated with their corresponding connector
jacks;
6. that the keyswitch overlay is pressed firmly
against the LCD metal bezel of the front shield
assembly;
Reassemble the radio in the reverse order of
disassembly, referring to "Servicing Major Subassemblies" (paragraph B) and making certain:
7. that there is no foreign material on the main O-ring
or stud seals;
1. that the protruding block that functions as the PA
heatsink (inside back casting), is coated with a
thin film of thermal compound (Motorola part number 11-10022A55), which helps provide maximum
heat transfer;
Inspect the chassis stud seals and the control
top panel O-ring and replace if any damage
exists.
2. that the RF board is properly seated in the chassis, and that when inserted, the five locking tabs
on the center shield are engaged with the chassis;
3. that when the controller board is reinstalled over
the center shield and mated to the RF board, the
connector plug of the controller is pressed firmly
into the connector jack of the RF board (the two
boards should snap together);
CAUTION
8. to properly orient the completed chassis assembly
before inserting it into the radio housing;
9. that the PTT switch and monitor button are not
depressed while the chassis is being inserted into
the housing;
10. that the slotted-spanner nut closest to the battery
latch is torqued first, then torque the other to the
proper specification listed in Table 13.
Table 13. Torque Specifications
Application
RX/TX Switch Spanner Nut
Frequency Switch Spanner Nut
Power Contact Screws
Slotted-Spanner Nut (Baseplate)
Volume Pot Spanner Nut
Controller Shield Screws
22
Torque
(in -lbs)
20
8
2.5
6
8
2.8
Torque
(N•m)
2.27
0.91
0.28
0.68
0.91
0.32
Torque
Bit Part No.
66-80371B34
66-80371B03
66-80321B79
66-80370B89
66-80371B03
66-80321B86
SECTION VII. BASIC THEORY OF OPERATION
A. Introduction to This Section
The following theory will help isolate the problem
to a particular board. Using circuit board replacement
as the basic service approach will maximize workingtime of the radio.
B. General Overview
The ASTRO Digital SABER radio is a wideband,
synthesized, fixed-tuned radio available in the
VHF, UHF, and 800MHz bands. All ASTRO Digital
SABER radios are capable of both analog operation
and ASTRO mode (digital) in 12.5kHz or 25kHz
bandwidths.
The ASTRO Digital SABER radio consists of four
major assemblies. They are:
•
Controller Board - contains the microcontrol unit
(MCU) and its associated memory and memory
management integrated circuit (IC), the digital signal processor and its associated memories and
support IC, the audio power amplifier, and a
switching regulator.
•
RF Board - contains all transmit, receive, and frequency generation circuitry including the digital
receiver back-end IC and the reference oscillator.
•
Display/Keypad Assemblies - contain the internal microphone and speaker, a two-line liquid
crystal display (LCD), and a 3 x 6 keypad.
•
Control Top - contains switches for volume and
mode selection, push-to-talk (PTT), monitor, and
several function-selectable switches.
C. Analog Mode of Operation
When the radio is receiving, the signal comes from
the antenna/antenna-switch connector to the RF
board, passes through the RX/TX switch and the
receiver front end. The signal is then filtered, amplified, and mixed with the first local-oscillator signal
generated by the voltage-controlled oscillator (VCO).
The resulting intermediate frequency (IF) signal is fed
to the IF circuitry, where it is again filtered and amplified. This amplified signal is passed to the digital
back-end IC, where it is mixed with the second local
oscillator to create the second IF at 450kHz. It is then
converted to a digital bit stream and mixed a third time
to produce a baseband signal. This signal is passed to
the controller board through a current-driven differential output. On the controller board, the digitalsignal-processor-support IC digitally filters and dis-
criminates the signal, and passes it to the digital-signal
processor (DSP). The DSP decodes the information in
the signal and identifies the appropriate destination for
it. For a voice signal, the DSP will route the digital
voice data to the DSP-support IC for conversion to an
analog signal. The DSP-support IC will then present
the signal to the audio power amplifier, which drives
the speaker. For signalling information, the
DSP will decode the message and pass it to the
microcontrol unit.
When the radio is transmitting, microphone audio
is passed from the audio power amplifier (PA) to the
DSP-support IC, where the signal is digitized. The
DSP-support IC passes digital data to the DSP, where
pre-emphasis and low-pass (splatter) filtering are
done. The DSP returns this signal to the DSP-support
IC, where it is reconverted into an analog signal and
scaled for application to the voltage-controlled oscillator as a modulation signal. Transmitted signalling
information is accepted by the DSP from the microcontrol unit, coded appropriately, and passed to the
DSP-support IC, which handles it the same as a voice
signal. Modulation information is passed to the synthesizer along the modulation line. A modulated carrier is
provided to the RF PA, which transmits the signal
under dynamic power control.
D. ASTRO Mode of Operation
In the ASTRO mode (digital mode) of operation,
the transmitted or received signal is limited to a discrete set of deviation levels, instead of continuously
varying. The receiver handles an ASTRO-mode signal
identically to an analog-mode signal up to the point
where the DSP decodes the received data. In the
ASTRO receive mode, the DSP uses a specifically
defined algorithm to recover information. In the
ASTRO transmit mode, microphone audio is processed identically to an analog mode with the
exception of the algorithm the DSP uses to encode the
information. This algorithm will result in deviation levels that are limited to discrete levels.
E. RF Board Basic Theory of Operation
The receiver front end consists of a preselector,
an RF amplifier, a second preselector, and a mixer.
Both preselectors in the VHF and UHF radios are varactor-tuned, two-pole filters controlled by the
microcontrol unit through the digital/analog (D/A) IC.
On the 800MHz receiver front end, these filters are
fixed-tuned. The RF amplifier is a dual-gate, galliumarsenide based IC. The mixer is a double-balanced,
23
active mixer coupled by transformers. Injection is provided by the VCO through an injection filter. See Table
14 for local oscillator (LO) and first IF information.
The frequency generation function is performed by
three ICs and associated circuitry. The reference oscillator provides a frequency standard to the
synthesizer/prescaler IC, which controls the VCO IC.
The VCO IC actually generates the first LO and transmit-injection signals and buffers them to the required
power level. The synthesizer/prescaler circuit module
incorporates frequency-division and comparison circuitry to keep the VCO signals stable. The
synthesizer/prescaler IC is controlled by the microcontrol unit through a serial bus. Most of the synthesizer
circuitry is enclosed in rigid metal cans on the RF
board to reduce microphonic effects.
The receiver back end consists of a two-pole crystal filter, an IF amplifier, a second two-pole crystal
filter, and the digital back-end IC. The two-pole filters
are wide enough to accommodate 5kHz modulation.
Final IF filtering is done digitally in the DSP-support
IC.
The digital back-end IC consists of an amplifier,
the second mixer, an IF analog-to-digital converter, a
baseband down-converter, and a 2.4MHz synthesis
circuit to provide a clock to the DSP-support IC on the
controller board. The second LO is generated by discrete components external to the IC. The output of the
digital back-end IC is a digital bit stream that is current
driven on a differential pair for a reduction in noise
generation.
The transmitter consists of an RF PA IC that gets
an injection signal from the VCO. Transmit power is
controlled by two custom ICs that monitor the output of
a directional coupler and adjust PA control voltages
correspondingly. The signal passes through a RX/TX
switch that uses PIN diodes to automatically provide
an appropriate interface to transmit or receive signals.
Antenna selection is done mechanically in the control
top.
F. Controller Board Basic Theory of Operation
The controller board contains the radio’s microcontrol unit with its memory and support circuits,
voltage regulators, audio, DSP, and power control circuits. Connected to the controller board are the
display board, RF board, and control top.
The microcontrol unit controls receive/transmit frequencies, power levels, display, and other radio
functions, using either direct logic control or serial
communications paths to the devices.The microcontrol
unit executes a stored program located in the FLASH
ROM. Data is transferred to and from memory by the
microcontrol unit data bus. The memory location from
which data is read, or to which data is written, is
selected by the address lines.
The support-logic IC acts as an extension of the
microcontrol unit by providing logic functions such as
lower address latch, reset, memory address decoding,
and additional control lines for the radio. The microcontrol unit controls the crystal-pull circuit to adjust the
crystal oscillator’s frequency on the microcontrol unit,
so that the E-clock’ s harmonics do not cause interference with the radio’s receive channel.
The regulator and power-control circuits include
an unswitched +5V discrete circuit and the
regulator/power-control IC. Switched +5V is used for
all circuits on the controller board except the audio PA,
which is sourced from 7.5V. The regulator automatically provides 5V when the radio is turned on. The
regulator’s power-down mode is controlled by the
microcontrol unit, which senses the position of the
on/off switch.
The DSP performs signalling and voice encoding
and decoding as well as audio filtering and volume
control. This IC performs Private-Line®/Digital Private
Line™ (PL/DPL) encode and alert-tone generation.
The IC transmits pre-emphasis on analog signals and
applies a low-pass (splatter) filter to all transmitted signals. It requires a 33MHz crystal to function. An 8kHz
interrupt signal generated by the DSP-support IC is
also required for functionality. It is programmed using
parallel programming from the microcontrol unit and
the DSP-support IC.
The DSP-support IC performs analog-to-digital
and digital-to-analog conversions on audio signals. It
contains attenuators for volume, squelch, deviation,
and compensation, and it executes receiver filtering
and discrimination. The IC requires a 2.4MHz clock to
function (generated by the digital back-end IC) and is
programmed by the microcontrol unit SPI bus.
Table 14. Local Oscillator and First IF Frequencies
LO Frequency Range
First IF Frequency
24
VHF
UHF
800MHz
181.15-223.15MHz
329.65-446.65MHz
732.65-796.65MHz
45.15MHz
73.35MHz
73.35MHz
SECTION VIII. BOARD-LEVEL TROUBLESHOOTING
A. Introduction to This Section
This section of the manual contains troubleshooting charts, error codes, a functional block diagram,
interconnect diagrams, and flexible circuit information.
This section will help you isolate a problem to the
board level. Board-level troubleshooting does not
attempt to isolate problems to the component level.
Component-level service information can be found in
the “ASTRO Digital SABER Portable Radios Detailed
Service Manual.” (Refer to “Related Publications Available Separately” list located in the front section of this
manual.)
NOTE
To access the various connector pins, use the
housing eliminator/test fixture along with the diagrams found in this section of the manual. (Refer to
the “Service Aids for Board-Level Troubleshooting”
table for the appropriate Motorola housing eliminator/test fixture part number.)
B. Replacement Board Procedures
Once a problem has been narrowed down to a
specific board, it is important to get the customer’s
radio back in service as quickly as possible. This can
be done several ways:
2. Order a replacement board from Worldwide System and Aftermarket Products Division at
1-800-422-4210.
3. Troubleshoot the defective board using the
“ASTRO Digital SABER Portable Radios Detailed
Service Manual.” (Refer to the “Related Publications Available Separately” list located in the front
section of this manual for the specific manual
number.)
C. Power-Up Error Codes
When the radio is turned on (power-up), the radio
performs cursory tests to determine if its basic electronics and software are in working order. Problems
detected during these tests are presented as error
codes on the radio’s display. The presence of an error
should prompt the user that a problem exists and that
a service technician should be contacted.
Self-test errors are classified as either fatal or nonfatal. Fatal errors will inhibit user operation; non-fatal
errors will not. Use Table 15 to aid in understanding
particular power-up error code displays.
1. Install a good board from your inventory into the
customer’s radio.
Table 15. Power-Up Error Code Displays
Error Code
Description
Corrective Action
01/81
ROM Checksum Failure
Reprogram the FLASH memory.
01/02
External EEprom Checksum Non-Fatal Error
Reprogram codeplug.
01/82
External EEprom Checksum Failure
Reprogram the codeplug.
01/88
RAM Failure - Note: not a checksum failure
Turn the radio off, then on.
01/90
General Hardware Failure
Turn the radio off, then on.
01/92
Internal EEPROM Checksum Failure
Reprogram the codeplug.
02/10
DSP support IC checksum Non-Fatal Error
Turn the radio off, then on.
02/81
DSP ROM Checksum Failure
Reprogram the FLASH memory.
02/88
DSP RAM Failure - Note: not a checksum failure
Turn the radio off, then on.
02/90
General DSP Hardware Failure
Turn the radio off, then on.
(DSP startup message not received correctly)
Note: If the corrective action does not fix the failure, replace the controller board.
25
D. Operational Error Codes
During radio operation, the radio performs dynamic tests to determine if the radio is working properly.
Problems detected during these tests are presented
as error codes on the radio’s display. The presence of
an error code should prompt a user that a problem
exists and that a service technician should be contacted. Use Table 16 to aid in understanding particular
operational error codes.
Table 16. Operational Error Code Displays
Error Code
FAIL 001
Description
Synthesizer Out-of-Lock
Corrective Action
a. Reprogram codeplug
b. Replace RF Board
FAIL 002
Selected Mode/Zone Codeplug Checksum Error
Reprogram codeplug
Table 17. Receiver Troubleshooting Chart
Symptom
Radio Dead;
Display Does
Not Light Up
Correction or Test (Measurements Taken at Room Temperature)
1. Dead Battery
2. Blown Fuse
3. On/Off Switch
Replace with charged battery.
Check see-through fuse on RF board near the B+ connector.
With the radio on, check for B+ SENSE at P901 pin 10 of the control top/
PTT flex; if not there, check for UNSW B+ at pin 19 of RF board connector;
if not there, replace the RF board; if there, replace the controller
board.
4. Regulators
Check for +5V at P901 pin 5 of the control top/PTT flex;
if not there, replace the controller board.
Radio Dead;
Display
1. Controller
Board
Check board for communication with RSS. If no communication,
replace controller board.
Lights Up
2. RF Board
Check the ODC (output data clock) at pin 8 of the RF board
connector for 2.4MHz. If not there, replace RF board.
No Receiver
Audio or
Receiver Does
Not Unmute
1. Programming
a. Does the transmitted signal match the receiver
configuration (PL, DPL, etc.)?
b. With the monitor function enabled, can the radio be unmuted?
Audio Distorted
or Not Loud
Enough
1. Synthesizer
Not On
Frequency
Check synthesizer frequency by measuring the transmitter frequency;
if off by more than ±250Hz, realign.
RF Sensitivity
Poor
1. Synthesizer
Not On
Frequency
Check synthesizer frequency by measuring the transmitter frequency;
if off by more than ≤ ±600Hz, realign.
2. Antenna Switch
Visually check for proper mechanical positioning of the antenna switch
to the RF board; re-position if necessary. Then, check for electrical
continuity between the center pin of the antenna connector and the
RF board; replace defective item.
3. Receiver
Front-End
Tuning
(VHF/UHF only)
Check RF front-end tuning for optimum sensitivity using the RSS.
1. Controller
Board
Does B+ SENSE at P901 pin 10 of the control top/PTT flex switch on and
off as the on/off switch is operated? If not, replace the controller board.
Radio Will
Not Turn Off
26
Possible Cause
Table 18. Transmitter Troubleshooting Chart
Symptom
Possible Cause
Correction or Test (Measurements Taken at Room Temperature)
No RF Power
Out
1. TX Power Level
or Frequency
Check TX power level and frequency programming (from RSS).
2. No PTT From
Control Top
With the PTT switch depressed (radio transmitting/keyed), check for INT PTT
at P901 pin 6 of the control top/PTT flex;
if not there, replace the control top/PTT flex.
3. No Injection To
Power Amplifier
Check LOCK DETECT at pin 13 of the RF board connector;
if not between 1.0 and 4.5V, replace the RF board.
No Modulation;
1. Programming
Check deviation and compensation settings using the RSS.
Distorted
Modulation
2. Controller
Board
With a 1kHz tone at 80mVrms injected at the external microphone, is the
output of the controller board to RF board connector pin 15 distorted?
If so, replace the controller board.
Bad Microphone
Sensitivity
1. Check
Deviation and
Compensation
Realign if necessary.
2. Microphone
Speaking loudly into the microphone, monitor the output voltage (INT MIC)
at the speaker microphone flex connector, P701 pin 4.
If not 2mVrms, replace the speaker/microphone and front shield assembly.
No/Low
Signalling
1. Check
Programming
(PL, DPL, MDC)
2. Controller
Board
Check for proper modulation at the RF board to controller board
connector pin 15; if not there, replace the controller board.
Can’t Set
Compensation
1. RF Board
If maximum deviation can be set to > 5.0kHz, but compensation
cannot be set, replace the RF board.
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NOTES
28
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