Service Manual
761x (VHF)
764x (UHF)
Conventional Mobile
VHF 146-174 MHz
45 Watts
Part No. 242-7610-0xx
UHF 400-430, 450-470, 470-490,
490-512 MHz
35 Watts
Part No. 242-7640-0xx
First Printing
November 1998
761x (VHF)
764x (UHF)
CONVENTIONAL
FM TWO-WAY RADIO
VHF 146-174 MHz
45 Watts
UHF 400-430, 450-470, 470-490, or 490-512 MHz
35 Watts
Copyright© 1998 by Transcrypt International Incorporated
Transcrypt offers communication solutions in two core areas: land mobile radio products
and systems, and information security. EFJohnson land mobile radios and systems provides wireless communication for a variety of markets including government, public safety,
and commercial users. Transcrypt’s information security devices utilize sophisticated
scrambling and encryption techniques to protect sensitive voice and data transmissions.
Viking Head/EFJohnson logo and Call Guard® are registered trademarks of Transcrypt
International Incorporated. Smartrunk II™ is a trademark of Smartrunk Systems Inc. All
other company and/or product names used in this manual are trademarks and/or registered trademarks of their respective manufacturer.
Information in this manual is subject to change without notice.
TABLE OF CONTENTS
1
GENERAL INFORMATION
1.1
1.2
SCOPE OF MANUAL . . . . . . . . . . . . . . . . . . . .1-1
TRANSCEIVER DESCRIPTION . . . . . . . . . . .1-1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.3
PRODUCT WARRANTY . . . . . . . . . . . . . . . . .1-1
1.4
PART NUMBER BREAKDOWN . . . . . . . . . . .1-1
1.5
TRANSCEIVER IDENTIFICATION. . . . . . . . .1-1
1.6
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1.7
FACTORY CUSTOMER SERVICE. . . . . . . . .1-1
1.8
FACTORY RETURNS. . . . . . . . . . . . . . . . . . . .1-2
1.9
REPLACEMENT PARTS . . . . . . . . . . . . . . . . .1-3
1.10 INTERNET HOME PAGE . . . . . . . . . . . . . . . . .1-3
2
INSTALLATION AND DISASSEMBLY
2.1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Scope of Instructions. . . . . . . . . . . . . . . . . . . . . . 2-1
Performance Tests. . . . . . . . . . . . . . . . . . . . . . . . 2-1
Transceiver Programming. . . . . . . . . . . . . . . . . . 2-1
Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
TRANSCEIVER INSTALLATION . . . . . . . . . .2-1
Selecting Mounting Location . . . . . . . . . . . . . . . 2-1
Installing Mounting Bracket . . . . . . . . . . . . . . . . 2-2
Installing Microphone Hanger . . . . . . . . . . . . . . 2-2
POWER CABLE INSTALLATION . . . . . . . . .2-2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Cable Installation . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Power Cable Fuses . . . . . . . . . . . . . . . . . . . . . . . 2-3
USING AN EXTERNAL SPEAKER . . . . . . . .2-3
ACCESSORY CABLE INSTALLATION . . . .2-3
TRANSCEIVER DISASSEMBLY . . . . . . . . . .2-4
2-TONE/5-TONE MODULE
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . .2-5
Installation Procedure . . . . . . . . . . . . . . . . . . . . . 2-5
2-Tone Programming . . . . . . . . . . . . . . . . . . . . . 2-5
5-Tone Programming . . . . . . . . . . . . . . . . . . . . . 2-5
2.2
2.3
2.4
2.5
2.6
2.7
3
OPERATION
3.1
3.2
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
CONTROLS AND DISPLAY . . . . . . . . . . . . . .3-2
Front Panel Controls . . . . . . . . . . . . . . . . . . . . . . 3-2
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
BASIC OPERATION . . . . . . . . . . . . . . . . . . . . .3-2
Turning Power On and Off . . . . . . . . . . . . . . . . . 3-2
Entering a Password . . . . . . . . . . . . . . . . . . . . . . 3-3
Volume Level Adjustment . . . . . . . . . . . . . . . . . 3-3
Power-On Menu . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Channel Selection . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.3
November 1998
Part No. 001-7600-001
3.4
3.5
3.6
4
PROGRAMMING
4.1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programming Setup. . . . . . . . . . . . . . . . . . . . . . .
Programming Cables . . . . . . . . . . . . . . . . . . . . . .
Programming Software . . . . . . . . . . . . . . . . . . . .
STARTING THE PROGRAM . . . . . . . . . . . . .
SPECIAL KEYS AND FUNCTIONS . . . . . . .
MENU FLOW . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
File Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Screen Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program Menu. . . . . . . . . . . . . . . . . . . . . . . . . . .
Print Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2
4.3
4.4
ii
Adjusting Squelch Level . . . . . . . . . . . . . . . . . . .
Bank Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Scan Enable . . . . . . . . . . . . . . . . . . . .
Backlight On-Off. . . . . . . . . . . . . . . . . . . . . . . . .
Beep On-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RECEIVING AND PLACING CALLS . . . . . .
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiving a Call . . . . . . . . . . . . . . . . . . . . . . . . .
Placing a Call . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitoring Before Transmitting . . . . . . . . . . . . .
Time-Out Timer . . . . . . . . . . . . . . . . . . . . . . . . .
PROGRAMMABLE FUNCTIONS . . . . . . . . .
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Backlight On-Off. . . . . . . . . . . . . . . . . . . . . . . . .
Bank Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Beep On-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Guard Tone Select . . . . . . . . . . . . . . . . . . . .
Channel Select. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTMF Number Select . . . . . . . . . . . . . . . . . . . . .
Emergency Key . . . . . . . . . . . . . . . . . . . . . . . . . .
Lock Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitor Mode Select. . . . . . . . . . . . . . . . . . . . . .
Output Power Select . . . . . . . . . . . . . . . . . . . . . .
Priority Channel Select . . . . . . . . . . . . . . . . . . . .
Receive Attenuate . . . . . . . . . . . . . . . . . . . . . . . .
Scan Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scan List Programming . . . . . . . . . . . . . . . . . . . .
Talk-Around Select . . . . . . . . . . . . . . . . . . . . . . .
2-Tone Calling Features . . . . . . . . . . . . . . . . . . .
5-Tone Calling Features . . . . . . . . . . . . . . . . . . .
Wide/Narrow Band Select. . . . . . . . . . . . . . . . . .
CHANNEL SCAN . . . . . . . . . . . . . . . . . . . . . . .
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scan Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Priority Channel Sampling . . . . . . . . . . . . . . . . .
3-3
3-4
3-4
3-4
3-4
3-4
3-4
3-4
3-4
3-4
3-5
3-5
3-5
3-5
3-5
3-5
3-6
3-6
3-6
3-6
3-6
3-6
3-6
3-6
3-6
3-6
3-7
3-7
3-7
3-7
3-7
3-7
3-7
3-7
3-8
4-1
4-1
4-1
4-1
4-2
4-2
4-2
4-2
4-2
4-3
4-3
4-3
4-3
4-4
TABLE OF CONTENTS (CONT’D)
4.5
4.6
UNIQUE PMR (EUROPEAN) SCREENS . . 4-15
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Unique PMR Screens . . . . . . . . . . . . . . . . . . . . 4-15
CLONING (PROGRAMMING ONE
TRANSCEIVER WITH ANOTHER) . . . . . 4-16
5A
VHF (7610) CIRCUIT DESCRIPTION
5.1
VHF RECEIVER CIRCUIT . . . . . . . . . . . . . . . . 5-1
Antenna Switching Circuit . . . . . . . . . . . . . . . . . 5-1
RF Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
First Mixer And First IF Circuits . . . . . . . . . . . . 5-1
Second IF and Demodulator Circuits . . . . . . . . . 5-1
Audio Amplifier Circuit . . . . . . . . . . . . . . . . . . . 5-2
Receiver Mute Circuit . . . . . . . . . . . . . . . . . . . . 5-2
VHF TRANSMITTER CIRCUIT . . . . . . . . . . . . 5-3
Microphone Amplifier Circuit . . . . . . . . . . . . . . 5-3
Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . 5-3
Transmit Driver Circuit . . . . . . . . . . . . . . . . . . . 5-3
Power Amplifier Module . . . . . . . . . . . . . . . . . . 5-3
APC Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
VHF PLL CIRCUIT . . . . . . . . . . . . . . . . . . . . . .5-4
PLL Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
VCO Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
VHF IC PIN DESCRIPTIONS . . . . . . . . . . . . . 5-5
VHF Power Supply. . . . . . . . . . . . . . . . . . . . . . . 5-5
VHF CPU IC1 Port Allocation. . . . . . . . . . . . . . 5-5
VHF I/O Expander IC5 (Main Unit) . . . . . . . . . 5-6
VHF Port Expander IC11 (Main Unit) . . . . . . . . 5-6
5.2
5.3
5.4
6
ADJUSTMENT PROCEDURE
6.1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Suggested Test Equipment . . . . . . . . . . . . . . . . . 6-1
Test Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Test Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Computer-Aided Tuning. . . . . . . . . . . . . . . . . . . 6-3
Reprogramming if EEPROM is Replaced or
Error Occurs . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
PRELIMINARY SETUP. . . . . . . . . . . . . . . . . . .6-4
PLL ADJUSTMENT (VHF MODELS). . . . . . .6-4
TRANSMITTER ADJUSTMENTS
(VHF MODELS). . . . . . . . . . . . . . . . . . . . . . . .6-4
Reference Frequency . . . . . . . . . . . . . . . . . . . . . 6-4
Output Power Adjust. . . . . . . . . . . . . . . . . . . . . . 6-5
FM Deviation Adjust . . . . . . . . . . . . . . . . . . . . . 6-5
DTCS Waveform Adjust. . . . . . . . . . . . . . . . . . . 6-6
RECEIVER ADJUSTMENTS
(VHF MODELS) . . . . . . . . . . . . . . . . . . . . . . .6-6
Bandpass Filter Adjust . . . . . . . . . . . . . . . . . . . . 6-6
Squelch Adjust . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Beep Tone Level . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
PLL ADJUSTMENT (UHF MODELS) . . . . . .6-8
TRANSMITTER ADJUSTMENTS
(UHF MODELS). . . . . . . . . . . . . . . . . . . . . . . .6-8
Reference Frequency . . . . . . . . . . . . . . . . . . . . . 6-8
Output Power Adjust. . . . . . . . . . . . . . . . . . . . . . 6-8
FM Deviation Adjust . . . . . . . . . . . . . . . . . . . . . 6-8
DTCS Waveform Adjust. . . . . . . . . . . . . . . . . . . 6-9
RECEIVER ADJUSTMENTS
(UHF MODELS). . . . . . . . . . . . . . . . . . . . . . .6-10
Bandpass Filter Adjust . . . . . . . . . . . . . . . . . . . 6-10
Squelch Adjust . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Beep Tone Level . . . . . . . . . . . . . . . . . . . . . . . . 6-10
6.2
6.3
6.4
6.5
6.6
6.7
6.8
5B
UHF (7640) CIRCUIT DESCRIPTION
5.5
UHF RECEIVER CIRCUIT . . . . . . . . . . . . . . . . 5-7
Antenna Switching Circuit . . . . . . . . . . . . . . . . . 5-7
RF Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
First Mixer And First IF Circuits . . . . . . . . . . . . 5-7
Second IF and Demodulator Circuits . . . . . . . . . 5-7
Audio Amplifier Circuit . . . . . . . . . . . . . . . . . . . 5-8
Receiver Mute Circuit . . . . . . . . . . . . . . . . . . . . 5-8
UHF TRANSMITTER CIRCUIT. . . . . . . . . . . . 5-9
Microphone Amplifier Circuit . . . . . . . . . . . . . . 5-9
Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . 5-9
Transmit Driver Circuit . . . . . . . . . . . . . . . . . . . 5-9
Power Amplifier Module . . . . . . . . . . . . . . . . . . 5-9
APC Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
UHF PLL CIRCUIT . . . . . . . . . . . . . . . . . . . . .5-10
PLL Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
VCO Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
UHF Power Supply. . . . . . . . . . . . . . . . . . . . . . 5-11
UHF CPU IC1 Port Allocation. . . . . . . . . . . . . 5-11
UHF I/O Expander IC12 (Main Unit) . . . . . . . 5-12
UHF Port Expander IC13 (Main Unit) . . . . . . . 5-12
5.6
5.7
7
PARTS LIST
VHF (761x) Models
Main Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Front Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18
Chassis Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20
Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . .7-21
UHF (764x) Models
Main Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
Front Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18
Chassis Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20
Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . .7-22
iii
November 1998
Part No. 001-7600-001
TABLE OF CONTENTS (CONT’D)
8
SCHEMATIC DIAGRAMS AND
COMPONENT LAYOUTS
LIST OF FIGURES
2-1
2-2
2-3
2-4
2-5
2-6
2-7
3-1
4-1
4-2
5-1
5-2
5-3
5-4
5-5
5-6
6-1
6-2
6-3
6-4
6-5
6-6
VHF (761x) Models
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Transistor and Diode Basing. . . . . . . . . . . . . . . . .8-2
Main Unit Board Bottom View. . . . . . . . . . . . . . .8-3
Main Unit Board, Top View . . . . . . . . . . . . . . . . .8-4
Main Unit Schematic . . . . . . . . . . . . . . . . . . . . . .8-5
Front Unit PC Board . . . . . . . . . . . . . . . . . . . . . .8-10
Front Unit Schematic . . . . . . . . . . . . . . . . . . . . .8-11
UHF (764x) Models
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .8-6
Transistor and Diode Basing. . . . . . . . . . . . . . . .8-12
Main Unit Board Bottom View. . . . . . . . . . . . . . .8-7
Main Unit Board, Top View . . . . . . . . . . . . . . . . .8-8
Main Unit Schematic . . . . . . . . . . . . . . . . . . . . . .8-9
Front Unit PC Board . . . . . . . . . . . . . . . . . . . . . .8-10
Front Unit Schematic . . . . . . . . . . . . . . . . . . . . .8-11
LIST OF TABLES
1-1
3-1
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
6-1
6-2
75xx Accessories . . . . . . . . . . . . . . . . . . . . . . . .1-2
Option Key Programmable Functions . . . . . . . .3-5
Memory Channel Screen Description
(LMR Models) . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Key and Display Assign Screen Description . . .4-7
DTMF Autodial Screen Description . . . . . . . . . .4-9
Continuous Tone Screen Description . . . . . . . .4-10
Scan Function Screen Description . . . . . . . . . .4-10
2-Tone Code Channel Screen Description . . . .4-11
Common Screen Description . . . . . . . . . . . . . .4-13
Expert Screen Description . . . . . . . . . . . . . . . .4-14
VHF Test Frequencies . . . . . . . . . . . . . . . . . . . . .6-3
UHF Test Frequencies . . . . . . . . . . . . . . . . . . . . .6-3
November 1998
Part No. 001-7600-001
iv
Installation Components . . . . . . . . . . . . . . . . . . 2-1
Mounting Bracket Installation. . . . . . . . . . . . . . 2-2
Accessory Cable Installation . . . . . . . . . . . . . . . 2-3
Cover and Front Panel Removal . . . . . . . . . . . . 2-4
PC Board Screws. . . . . . . . . . . . . . . . . . . . . . . . 2-4
Removing PC Board . . . . . . . . . . . . . . . . . . . . . 2-4
2/5-Tone Module Installation . . . . . . . . . . . . . . 2-5
7600 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Programming Setup. . . . . . . . . . . . . . . . . . . . . . 4-1
Memory Channel Screen (PMR Models) . . . . 4-17
Second IF System IC3 (VHF) . . . . . . . . . . . . . . 5-2
Audio Switching and Amplifier Circuit (VHF) 5-2
PLL Circuit (VHF) . . . . . . . . . . . . . . . . . . . . . . 5-4
Second IF System IC1 (UHF) . . . . . . . . . . . . . . 5-8
Audio Switching and Amplifier Circuit (UHF) 5-8
PLL Circuit (UHF) . . . . . . . . . . . . . . . . . . . . . 5-10
Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Screen Display Example . . . . . . . . . . . . . . . . . . 6-2
Test Cable Schematic . . . . . . . . . . . . . . . . . . . . 6-2
VHF Adjustment Points . . . . . . . . . . . . . . . . . . 6-5
Beep Tone Level Adjustment . . . . . . . . . . . . . . 6-7
UHF Adjustment Points . . . . . . . . . . . . . . . . . . 6-9
GENERAL INFORMATION
SECTION 1 GENERAL INFORMATION
1.1 SCOPE OF MANUAL
1.4 PART NUMBER BREAKDOWN
This service manual contains operation, installation, programming, alignment, and service information
for the EFJohnson® 7610 and 7640 mobile transceivers.
The following is a breakdown of the part number
used to identify this transceiver.
242 - 7 6 x x - 0 x x
Config.
Band
1 = VHF
4 = UHF
1.2 TRANSCEIVER DESCRIPTION
1.2.1 GENERAL
7610 (VHF)
7640 (UHF)
mic
7 = w/o mic
Type
The 7600-series mobile transceivers operate on
conventional (non-trunked) channels. The 7610 operates in the VHF frequency range of 146-174 MHz, and
the 7640 operates in the UHF frequency range of
400-430, 450-470, 470-490, or 488-512 MHz. Up to
32 channels can be programmed. Power output is user
selectable or fixed for the following levels. Refer to
Section 3.1 for more information on features.
Model
2 = Std mic
3 = With DTMF
Freq Range
0 = Full band
1 = 400-430 (UHF)
3 = 146-174 (VHF)
450-470 (UHF)
4 = 470-490 (UHF)
5 = 488-512 (UHF)
0 = Half duplex, dual
IF, high power
Signaling
0 = Conventional only
NOTE: Not all configurations
are available.
High
Low 1
Low 2
1.5 TRANSCEIVER IDENTIFICATION
45W
35W
25W
20W
4.5W
3.5W
The transceiver identification number is printed
on a label that is attached to the chassis. The following
information is contained in the identification number:
These transceivers are digitally synthesized and
microprocessor controlled. Transceiver programming
is performed using a PC-compatible computer, a special EFJohnson programming cable, and programming software (see Table 1-1). The alignment procedure is performed using this same hardware setup, a
fabricated test cable, and special Adjust software
included with the programming software (see
Section 4).
Warranty
Revision Manufacture
Plant Number
Letter
Date
Model
From P.N.
76xx
8th Digit
of P.N.
0
A
Week No.
of Year
23 8
J
12345
J = Japan
Last Digit of Year
1.6 ACCESSORIES
1.3 PRODUCT WARRANTY
The accessories available for this transceiver are
listed in Table 1-1.
The warranty statement for this transceiver is
available from your product supplier or from the Warranty Department, EFJohnson, 299 Johnson Avenue,
P.O. Box 1249, Waseca, MN 56093-0514. This information may also be requested from the Warranty
Department by phone as described in Section 1.7. The
Warranty Department may also be contacted for Warranty Service Reports, claim forms, or any other questions concerning warranties or warranty service.
1.7 FACTORY CUSTOMER SERVICE
The Customer Service Department of EFJohnson
provides customer assistance on technical problems
and the availability of local and factory repair facilities. Regular Customer Service hours are 7:30 AM. -
1-1
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Part No. 001-7600-001
GENERAL INFORMATION
Table 1-1 75xx Accessories
5:30 PM. Central Time, Monday - Friday. The
Customer Service Department can be reached using
one of the following telephone numbers:
Accessory
Toll-Free: (800) 328-3911
(From within continental United States only)
International: (507) 835-6911
FAX: (507) 835-6969
E-Mail: First Initial/Last Name@efjohnson.com
(You need to know the name of the person you want to
reach. Example: jsmith@efjohnson.com)
NOTE: Emergency 24-hour technical support is also
available at the 800 and preceding numbers during off
hours, holidays, and weekends.
When your call is answered at EFJohnson, you
will hear a brief message informing you of numbers
that can be entered to reach various departments. This
number may be entered during or after the message
using a tone-type telephone. If you have a pulse-type
telephone, wait until the message is finished and an
operator will come on the line to assist you. When you
enter some numbers, another number is requested to
further categorize the type of information you need.
Mounting bracket
DC cable assembly
Mounting screws and fuses
585-7600-040
585-7600-029
585-7600-041
Microphone hanger
Mic hanger ground wire
Function name stickers
023-3514-001
023-7171-911
585-7600-042
Microphone, standard
Microphone, DTMF
585-7600-020
585-7600-022
2-Tone/5-tone module kit
5”, 4.7-ohm, 15W external speaker
Compact speaker
Accessory/data cable (DB-9 connector)
585-7600-026
250-0151-010
585-7600-023
585-7600-027
Programming Accessories
Programming software, 3-1/2 disk
Programming cable, computer-adapter
Adapter cable, prog cable-xcvr
Replication (cloning) cable
DB-9 M to DB-25 F adapter
585-7600-030
585-7500-031
585-7600-031
597-2002-200
515-9000-015
to the problem so that return of the equipment would
not be necessary.
You may also contact the Customer Service
Department by mail. Please include all information
that may be helpful in solving your problem. The mailing address is as follows:
Be sure to fill out a Factory Repair Request Form
#271 for each unit to be repaired, whether it is in or
out of warranty. These forms are available free of
charge by calling Customer Service (see Section 1.7)
or by requesting them when you send a unit in for
repair. Clearly describe the difficulty experienced in
the space provided and also note any prior physical
damage to the equipment. Then include a form in the
shipping container with each unit. Your telephone
number and contact name are important because there
are times when the technicians have specific questions
that need to be answered in order to completely identify and repair a problem.
EFJohnson
Customer Service Department
299 Johnson Avenue
P.O. Box 1249
Waseca, MN 56093-0514
1.8 FACTORY RETURNS
Repair service is normally available through local
authorized EFJohnson Land Mobile Radio Service
Centers. If local service is not available, the equipment
can be returned to the factory for repair. However, it is
recommended that you contact the Customer Service
Department before returning equipment because a service representative may be able to suggest a solution
November 1998
Part No. 001-7600-001
Part No.
When returning equipment for repair, it is also a
good idea to use a PO number or some other reference
number on your paperwork in case you need to call the
repair lab about your unit. These numbers are referenced on the repair order and it makes it easier and
faster to locate your unit in the lab.
1-2
GENERAL INFORMATION
nator (C512, for example) and the model number of
the equipment the part is from.
Return Authorization (RA) numbers are not necessary unless you have been given one by the Field
Service Department. RA numbers are required for
exchange units or if the Field Service Department
wants to be aware of a specific problem. If you have
been given an RA number, reference this number on
the Factory Repair Request Form sent with the unit.
The repair lab will then contact the Field Service
Department when the unit arrives.
You may also send your order by mail or FAX.
The mailing address is as follows and the FAX number
is shown in Section 1.7.
EFJohnson
Service Parts Department
299 Johnson Avenue
P.O. Box 1249
Waseca, MN 56093-0514
1.9 REPLACEMENT PARTS
Replacement parts can be ordered directly from
the Service Parts Department. To order parts by phone,
dial the toll-free number as described in
Section 1.7. When ordering, please supply the part
number and quantity of each part ordered. EFJohnson
dealers also need to give their account number. If there
is uncertainty about the part number, include the desig-
1.10 INTERNET HOME PAGE
EFJohnson has a site on the World Wide Web that
can be accessed for information on the company and
such things as products, systems, and regulations. The
address is http://www.efjohnson.com.
1-3
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GENERAL INFORMATION
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Part No. 001-7600-001
1-4
GENERAL INFORMATION
7610 (VHF) AND 7640 (UHF) MOBILE SPECIFICATIONS
The following are general specifications intended for use in testing and servicing this transceiver. For current
advertised specifications, refer to the specification sheet available from your sales representative. Values are
typical and are subject to change without notice.
GENERAL
Frequency Range
VHF: 146-174 MHz
UHF: 400-430 MHz, 450-470 MHz, 470-490 MHz, or 488-512 MHz (some
performance degradation from 488-490 MHz with 488-512 MHz models)
Operating Modes
Conventional (non-trunked), Tone and digital Call Guard® squelch
Channels
32 maximum (2 banks x 16 channels available)
Transmit/Receive Separation
Any frequency within the range
Channel Spacing (dual IF Models) VHF - 12.5 kHz (narrow band) and 30 kHz (wideband)
UHF - 12.5 kHz (narrow band) and 25 kHz (wideband)
Maximum Deviation
12.5/15 kHz channel spacing - 2.5 kHz maximum
25 kHz channel spacing - 5.0 kHz maximum
Frequency Stability
5.0 PPM (VHF), 2.5 PPM (UHF) from –22° to +140° F (–30° to +60° C)
Dimensions (w/o controls)
1.6” H x 5.5” W x 6.7” D (4.1 cm x 13.9 cm x 17.0 cm)
Weight
2 lb. 11 oz. (1.22 kg)
Supply Voltage
13.6 volts DC nominal (12-volt, negative ground vehicle electrical system)
Current Drain (maximum)
Standby - 200 mA standby
Receive (rated audio out) - 700 mA
Medium Tx Power - 6.0 A (VHF), 7.0 A (UHF)
High Tx Power - 15 A max/10 A typ (VHF), 11 A max/8 A typ (UHF)
FCC Compliance
Parts 15 and 90
RECEIVER
Sensitivity (12 dB SINAD)
Selectivity
Spurious and Image Rejection
Intermodulation
Hum and Noise
Maximum Frequency Spread
Audio Power Output
Audio Distortion
Audio Response
RF Input Impedance
0.25 µV
70 dB at 25 kHz, 60 dB at 12.5 kHz
70 dB
65 dB
46 dB at 25 kHz, 40 dB at 12.5 kHz
Any spread within the range
3.5 W into 4-ohm load
Less than 10% at 1 kHz with 60% deviation
+2, –8 dB at 6 dB per octave de-emphasis
50 ohms
TRANSMITTER
RF Power Output
VHF: 45W (high), 25W (low 1), 4.5W (low 2)
UHF: 35W (high), 20W (low 1), 3.5W (low 2)
Spurious and Harmonic Emissions 70 dB
FM Hum and Noise
46 dB at 25 kHz, 40 dB at 12.5 kHz
Audio Modulation
12.5 kHz - 11K0F3E, 25 kHz - 16K0F3E
Audio Distortion
Less than 5% at 1 kHz with 40% modulation
Audio Frequency Response
+2, –8 dB at 6 dB per octave pre-emphasis
Maximum Frequency Spread
Any spread within the band
RF Output Impedance
50 ohms
Duty Cycle
20% TIA
1-5
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Part No. 001-7600-001
GENERAL INFORMATION
NOTES
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Part No. 001-7600-001
1-6
INSTALLATION AND DISASSEMBLY
SECTION 2 INSTALLATION AND DISASSEMBLY
Optional Accessory Cable
P.N. 585-7600-027
External Spkr Jack
UHF-Type
Ant Jack
DB-9 Female
Red (+)
10-Ft. Power Cable
Black (–)
Optional External Speaker
P.N. 250-0151-010
20A Fuses
Figure 2-1 Installation Components
2.1 GENERAL
2.1.1 SCOPE OF INSTRUCTIONS
Since each installation is somewhat unique, the
following installation instructions are intended only as
a general guide to installing this transceiver.
2.1.2 PERFORMANCE TESTS
Although each transceiver is carefully tested at
the factory before shipment, it is good practice to verify proper operation before it is placed in service.
Important checks are receiver sensitivity and transmitter frequency, deviation, and power output.
2.1.3 TRANSCEIVER PROGRAMMING
The transceiver needs to be programmed before it
is placed in service. Programming instructions are
located in Section 4. Transceivers normally contain
factory test channels and other test parameters when
they are shipped. The included labels should be
attached to the option keys to indicate the function.
2.1.4 POWER SOURCE
This transceiver must be connected to a nominal
12 VDC, negative ground vehicle electrical system
(negative battery terminal connected directly to the
chassis). If the vehicle has some other type of electrical system, a suitable voltage converter is required.
2.2 TRANSCEIVER INSTALLATION
2.2.1 SELECTING MOUNTING LOCATION
This transceiver is designed for mounting in a
location within convenient reach of the operator such
as the dash, console, or floor. Since the mounting location can affect safe operation of the vehicle, observe
the following precautions:
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Part No. 001-7600-001
INSTALLATION AND DISASSEMBLY
Figure 2-2 Mounting Bracket Installation
WARNING
•
Do not mount the transceiver where it may interfere with the operation of vehicle controls.
•
Do not mount the transceiver where the user cannot easily reach the controls and view the
display.
•
Do not mount the transceiver where it may cause
additional injury in case of an accident.
•
2.2.3 INSTALLING MICROPHONE HANGER
Install the included microphone hanger in a convenient location. For proper operation of functions
such as monitoring and scanning, the hanger may need
to be connected to chassis ground. If required, ground
the hanger using the included grounding wire.
2.3 POWER CABLE INSTALLATION
2.3.1 GENERAL
Air bags inflate with great force. Therefore, do
not mount this transceiver in the deployment
area of an air bag. In addition, do not place other
objects in the deployment area or other locations
where they could unintentionally move into the
deployment area.
It is recommended that both wires of the power
cable be connected directly to the vehicle battery. Connection of either wire to other points may result in
increased interference from the vehicle’s electrical
system. If noise is still a problem, try installing a noise
filter.
2.2.2 INSTALLING MOUNTING BRACKET
2.3.2 CABLE INSTALLATION
Check the area behind the intended mounting
location for wiring, brake and gas lines, or other components that could be damaged when the mounting
screws are installed. Then install the bracket and transceiver as shown in Figure 2-2. Both standard and selftapping screws are included for installing the bracket.
November 1998
Part No. 001-7600-001
1. Before starting power cable installation, it is good
practice to remove the negative cable from the battery to prevent damage from accidental short
circuits.
2-2
INSTALLATION AND DISASSEMBLY
input that can be used to control the backlight (see
Section 3.3.9). This cable is installed as shown in
Figure 2-3.
2. Route the red and black wires from the transceiver
to the battery. Connect the red wire to the positive
(+) terminal and the black wire to the negative (–)
terminal.
This cable has a standard DB-9 female connector
for interfacing to external equipment. The pin numbering and functions are as follows:
3. Plug the cable into the pigtail coming from the transceiver and reconnect the negative battery cable.
4. Install the antenna according to the manufacturer’s
instructions. The transceiver has a standard UHF
connector. Check VSWR. Reflected power should
be less than 4% of forward power (VSWR less than
1.5 to 1).
DB-9 Female Connector
Outside View
DB-9 Pin
2.3.3 POWER CABLE FUSES
1
2
3
4
5
6
7
8
9
Each power cable wire is protected by a 20ampere fuse. These fuses are inspected and changed as
shown below. If a fuse blows, locate the cause if possible and replace it with one of the same rating.
Function
LCD backlight control in
AF out
Detected AF out
Modulation in
PTT control in
Horn drive control out
AF ground
Detected AF ground
Modulation ground
Changing 20-Ampere Power Cable Fuses
2.4 USING AN EXTERNAL SPEAKER
An external speaker can be plugged into the
external speaker jack on the back of the transceiver.
This speaker should have an impedance of 4-8 ohms
and a power handling capability of at least 3.5 watts.
The internal speaker is automatically disabled when a
speaker is plugged into this jack. The external speaker
jack is a standard 1/8-inch, two-conductor phone jack.
2.5 ACCESSORY CABLE INSTALLATION
Optional Accessory Cable, Part No. 585-7600027, can be used for connecting accessories such a
horn alert or modem to the transceiver. It also has an
Figure 2-3 Accessory Cable Installation
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INSTALLATION AND DISASSEMBLY
2.6 TRANSCEIVER DISASSEMBLY
Removing Bottom Cover and Front Panel
1. Remove the bottom cover by removing four screws
(A) as shown in Figure 2-4.
2. Remove the front panel by removing two screws
(B).
Figure 2-5 PC Board Screws
Figure 2-4 Cover and Front Panel Removal
Removing PC Board
3. Remove ten screws (C) and two clips (D) as shown
in Figure 2-5.
Figure 2-6 Removing PC Board
4. Remove shield (E).
5. Unsolder the antenna connector at three points (F).
6. Lift the front of the PC board assembly as shown in
Figure 2-6 and pull it out.
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2-4
INSTALLATION AND DISASSEMBLY
2.7 2-TONE/5-TONE MODULE INSTALLATION
Screen Menu - Select “Key & Display Assign” and
program an option key or the microphone hanger
for the monitor function so that the decoder can
be re-activated when the call is complete (see
Table 4-2).
2.7.1 INSTALLATION PROCEDURE
1. Turn power off and disconnect the power cable.
2.7.3 5-TONE PROGRAMMING
2. Remove the bottom cover by removing the four
screws (A) shown in Figure 2-5.
Program the transceiver for operation with a fivetone module as described in Section 4. Screens that
need to be programmed with five-tone decoder information are as follows. Refer to on-line help for information on parameters in these screens (press F1 with
parameter selected).
3. Install the module as shown in Figure 2-7. The
included foam pad is not used with this transceiver.
Model Menu - “PMR” must be selected (see
Section 4.4.6).
Select the following in the Screen Menu:
•
“Rx Code CH” and program the information in
the screen (see Section 4.5.2).
•
“Tx Code CH” and program the information in
the screen (see Section 4.5.2).
•
“User Tone” and program the information in the
screen (see Section 4.5.2).
•
“Memory CH” and program the parameters in
this screen that are related to 5-tone operation on
the channel (see Figure 4-2).
Figure 2-7 2/5-Tone Module Installation
2.7.2 2-TONE PROGRAMMING
Program the transceiver for operation with a twotone decoder as described in Section 4. Screens that
need to be programmed with two-tone decoder information are as follows. Refer to on-line help for more
information on parameters in these screens (press F1
with parameter selected).
NOTE: If performing the deviation adjustment in
the next section, the long tone must be turned on in
RPT/STN/ID on the Memory Channel screen.
•
Model Menu - “LMR” must be selected (see
Section 4.4.6).
Screen Menu - Select “2Tone Code CH” and
program the information in the screen (see
Table 4-6).
“Key & Display Assign” and program Tx Code
and Call switches for use in transmitting 5-tone
codes.
Setting 5-Tone Deviation
The only adjustment on the 2/5-tone module is a
potentiometer for setting the transmit tone deviation
for 5-tone operation. This control is factory preset and
should not require readjustment in the field. However,
if adjustment is required, proceed as follows:
Screen Menu - Select “Memory Channel” and program the information under “2Tone Dec” for
each channel on which the decoder will be used
(see Table 4-1).
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Part No. 001-7600-001
INSTALLATION AND DISASSEMBLY
4. Check channels on each end of the operating band to
make sure deviation is within the following
limits. If not, repeat preceding adjustment.
1. Monitor the transmit signal with a communications
monitor. Set it for HPF = Off, LPF = 20 kHz, Deemphasis = Off, and Level = (P-P)/2.
25 kHz Channel Spacing - ±3.0 to 5.0 kHz
20 kHz Channel Spacing - ± 2.4 to 4.0 kHz
12.5 kHz Channel Spacing - ±1.5 to 2.5 kHz
2. Select a channel near the center of the band and turn
a long tone on (see preceding “NOTE”) by pressing
the appropriate front panel key.
3. Adjust potentiometer R18 (DEV) on the module for
the following deviation:
NOTE: It is recommended that scanning not be used
with these options because in may cause part or all of
the tone burst to be missed.
25 kHz Channel Spacing - ±3.5 kHz
20 kHz Channel Spacing - ±2.8 kHz
12.5 kHz Channel Spacing - ±1.7 kHz
November 1998
Part No. 001-7600-001
2-6
OPERATION
SECTION 3 OPERATION
Volume
Down
Volume
Up
Microphone
Connector
Transmit
Indicator
Scan List
Indicator
Busy
Indicator
Bell
Indicator
Monitor
Indicator
Alphanumeric
Display
Channel
Up*
Programmable Option Switches
Channel
Down*
Power
Switch
* The Channel Up/Down switches can also be programmed for other functions.
Figure 3-1 7600 Front Panel
3.1 FEATURES
•
Up to 32 channels programmable
•
Multi-tone (CTCSS) and/or Multi-code (CDCSS)
Call Guard® squelch programmable
•
VHF and UHF, wideband and narrowband models
available
•
Up to 45 watts VHF and 35 watts UHF transmitter
power output
•
Seven-character alphanumeric display with backlight
•
Six programmable option keys
•
•
Normal and priority scan to ensure that calls are not
missed
•
Up to five different user programmable scan lists
selectable
•
Bank select available (up to two banks with sixteen
channels each)
•
User selectable power output available
•
DTMF microphone optional
•
2-tone/5-tone signaling optional
NOTE: Some of the preceding features are available
only if programmed.
Busy indicator
3-1
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Part No. 001-7600-001
OPERATION
3.2 CONTROLS AND DISPLAY
Monitor Indicator (
) - Indicates that the monitor
mode is enabled. This mode disables coded squelch
control so that all messages occurring on the channel
are heard. Refer Section 3.4.4 for more information.
3.2.1 FRONT PANEL CONTROLS
Power Switch (
) - Press this switch to turn power
on and press and hold it to turn power off. The transceiver may be programmed so that a password must be
entered to allow operation. Refer to Section 3.3.2 for
more information.
Display - This seven-character display indicates the
selected channel, status information, and error conditions. If information in this display begins flashing, an
error condition is indicated. Two possible causes are a
defective antenna or a battery voltage below 8 VDC.
Volume Up/Down Keys (
) - Adjust the volume level up or down in up to 32 steps. The minimum
selectable volume level can be set as described in
Section 3.3.3.
3.2.3 BACK PANEL
External Speaker Jack - Miniature phone jack for
connecting an optional 4-8 ohm external speaker. The
internal speaker is automatically disabled when a
speaker is plugged into this jack.
Up/Down Keys (
) - These keys may be programmed to select the next higher or lower channel or
for other functions. Refer to the descriptions in Section
3.5 for more information.
Antenna Jack - UHF-type jack for connecting the
antenna.
Microphone Connector - Connection point for the
microphone. Do not connect microphones other than
standard microphone P.N. 589-7600-020 and DTMF
microphone P.N. 589-7600-022 to this transceiver. The
pin assignments could be different and damage to the
microphone or transceiver may result.
DC Power Cable - Connects the transceiver to a nominal 12 VDC, negative ground vehicle power source.
Refer to Section 2-1 for more information.
Accessory Cable - This optional cable is used to connect accessories such as a horn alert and modem to the
transceiver. Refer to Section 2-1 for more information.
F1/F2/F3/F4 - These keys can be programmed to control any of the functions described in Section 3.5. Place
the applicable included label on the switch to indicate
its function.
Ext Speaker
Jack
Antenna
Jack
3.2.2 DISPLAY
Transmit Indicator (
) - Indicates that the transmitter is keyed or the 5-tone code is being sent (if applicable). If this indicator is flashing, the internal
temperature is high and the transmitter power output is
being cut back. Normal operation automatically
resumes when the temperature returns to the normal
range.
Optional
Accessory Cable
DC Power
Cable
Transceiver Back Panel
3.3 BASIC OPERATION
Busy Indicator (
) - Indicates the currently selected
channel is busy (see Section 3.4.4).
3.3.1 TURNING POWER ON AND OFF
Bell Indicator (
) - Appears or flashes when a
5-tone call is detected that the transceiver is
programmed to receive.
When power is turned on by pressing the
POWER switch, a tone sounds and an opening message is displayed if programmed. The transceiver is
November 1998
Part No. 001-7600-001
3-2
OPERATION
and then again to return to the normal channel
display.
then ready to be used. To turn power off, press and
hold the POWER switch until power turns off.
3.3.2 ENTERING A PASSWORD
F1 - Minimum volume level (see Section 3.3.3)
F2 - Key beep on-off (see Section 3.5.4)
F3 - Backlight on-off (see Section 3.5.2
F4 - Squelch adjust (see description which follows)
The transceiver may be programmed so that a
password must be entered before the transceiver can
be used. When power is then turned on, “PWORD” is
displayed and the four-digit passcode must be entered.
This code is entered using the F1-F4 and channel
down (
) keys. The number entered by each key is
as follows. The numbers in a block are detected as the
Key
F1
F2
F3
F4
Number
Entered
0
5
1
6
2
7
3
8
3. To return the F1-F4 keys to the programmed functions, turn transceiver power off and on again without
pressed.
3.3.5 CHANNEL SELECTION
4
9
Channel Scrolling - If the
keys are programmed as CH UP or CH DN keys, they can be
pressed to scroll up or down through the programmed
channels.
same. For example, “1234” is the same as “6789”. If
the “PWORD” indication does not turn off after entering four digits, you may have entered an incorrect
number. Cycle transceiver power and try again.
Direct Selection - The F1-F4 and
keys can
be programmed to directly select a specific channel.
These keys are then labeled CH 1 to CH 4 .
3.3.3 VOLUME LEVEL ADJUSTMENT
The volume can be adjusted in up to 32 steps by
pressing the volume up/down keys (
). A
graph in the alphanumeric display indicates the current
volume level. If equipped with a MONI option switch,
you may be able to press (or press and hold) that
switch to enable audio for use as a reference level.
3.3.6 ADJUSTING SQUELCH LEVEL
The squelch level is adjusted by programming or
selecting the power-on menu just described. Proceed
as follows to use the power-on menu:
1. Select a non-busy channel. Then select the poweron menu by turning power on with the up and down
keys pressed.
The minimum selectable volume level can be set
by the power-on menu described in Section 3.3.4.
Select this mode and then press F1 to display
“AFMIN”. Then press the volume up/down keys to
select the desired minimum level. The current level is
indicated by the bar graph, or receiver noise can be
enabled as described in Section 3.3.6.
2. Press the F4 option key to select the squelch adjust
mode indicated by “SQ xx”.
3. Press the down
key until noise is heard from
the speaker (adjust the volume if necessary). Then
press the up
key until the noise just mutes (the
“SQ xx” number indicates the relative squelch
level).
3.3.4 POWER-ON MENU
The power-on menu is a special menu that can be
selected at power on to control various functions.
Proceed as follows:
4. Reselect normal operation by turning power off and
on without the up and down keys pressed.
1. Select the power-on menu by turning power on with
the up and down
keys pressed.
NOTE: If weak messages are not heard or unsquelching occurs when no messages are present, slight readjustment up or down may be required.
2. The F1-F4 keys now control the following functions. Press the switch once to select the function
3-3
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Part No. 001-7600-001
OPERATION
3.3.7 BANK SELECT
a microphone with a telephone keypad, or up to seven
telephone numbers also may be preprogrammed and
then selected by pressing the DTMF key (see description in Section 3.5.7).
Two banks of up to 16 channels each can be programmed. Only the channels in the current bank are
then selectable. This would allow, for example, groups
of channels to be programmed for operation in different cities.
3.4.2 RECEIVING A CALL
1. Turn transceiver power on and set the volume level
as described starting in Section 3.3.1.
The BANK key is pressed to switch between
banks, and the current bank is indicated briefly in the
display as “BANK 1” or “BANK 2”. If bank select is
not used, a single block of up to 32 channels can be
programmed.
2. Select or scan the channel or channels on which you
want to receive the call. Refer to Section 3.6 for
more information on scanning.
3.3.8 AUTOMATIC SCAN ENABLE
3. When the message is received, take the microphone
off-hook and respond. Press the microphone pushto-talk (PTT) switch to talk and release it to listen.
The transceiver can be programmed so that scanning is automatically enabled whenever power is
turned on or the microphone is placed on-hook. Refer
to the scan description in Section 3.6 for more
information.
4. When the conversation is finished, place the microphone back on-hook. The microphone hanger may
control features such as scanning and monitoring
that are described later.
3.3.9 BACKLIGHT ON-OFF
3.4.3 PLACING A CALL
The following backlight modes can be selected
by the LITE option switch or by pressing F3 in the
power-on menu described in Section 3.3.4.
1. Turn transceiver power on and set the volume level
as described starting with Section 3.3.1.
2. Select the channel on which the call will be made as
described in Section 3.4.
LI ON - On continuously
LI OF - Always off
LI AT - Controlled by the voltage applied to pin 1
of the DB9 connector on the optional accessory
cable (see “Light” in Table 4-2).
3. Regulations require that the channel be monitored
before transmitting to make sure that it is not being
used by anyone else. If you were to transmit while
someone was talking, you would probably disrupt
their conversation. Refer to “Monitoring Before
Transmitting” description which follows for more
information.
3.3.10 BEEP ON-OFF
The key beep which sounds when keys are
pressed can be enabled and disabled by pressing the
BEEP option switch or pressing F2 in the power-on
menu described in Section 3.3.4. Either “BP ON” or
“BP OF” is displayed to indicate the current mode.
4. If the channel is not busy, press the microphone PTT
switch to talk and release it to listen.
5. When the conversation is finished, place the microphone back on-hook.
3.4 RECEIVING AND PLACING CALLS
3.4.1 INTRODUCTION
3.4.4 MONITORING BEFORE TRANSMITTING
The two calls which can be placed and received
are mobile-to-mobile and telephone calls. With telephone calls, the telephone number can be dialed using
November 1998
Part No. 001-7600-001
Use one of the following methods to monitor the
channel before transmitting a message:
3-4
OPERATION
•
Table 3-1 Option Key Programmable
Functions
Note if the busy indicator (
) on the front panel
is being displayed. If it is not, the channel is not busy
and a message can be transmitted.
Function
•
•
•
Taking the microphone off-hook disables coded
squelch control if it is programmed for the monitor
function. Take the microphone off-hook and the
indication should be displayed. If no messages are heard, the channel is not busy and a message
can be transmitted.
Backlight On-Off
If the monitor ( MONI ) option switch is programmed, pressing it disables coded squelch control
similar to taking the microphone off-hook. If no
messages are then heard, the channel is not busy and
a message can be transmitted. Press the switch again
to disable monitoring.
If the Transmit Disable On Busy feature is programmed on the channel, the transmitter is automatically disabled if the channel is busy. This is
indicated by the display flashing and a rapid beeping
when the PTT switch is pressed.
3.3.9
Bank Select
BANK
3.3.7
Beep on-off
BEEP
3.3.10
Call Guard Tone Select
TONE
3.5.7
Channel Select
CH UP CH DN
CH 1 CH 2
CH 3 CH 4
3.3.5
DTMF Number Select
DTMF
3.5.7
Emergency Switch
EMER
3.5.8
Lock enable/disable
LOCK
3.5.9
Monitor Mode Select
MONI
3.4.4
Output Power Select
HIGH LOW1
LOW2
3.5.11
Priority Channel Select
PRI A PRI B
3.6.3
Scan Select
Scan List Programming
Talk-Around Select
The time-out timer disables the transmitter if it is
keyed continuously for longer than the programmed
time. If the transmitter is disabled by this feature, the
transmit indicator (
) turns off and the display
flashes and a beeping tone is produced until the PTT
switch is released.
Description
Section No.
LITE
Receive Attenuate
3.4.5 TIME-OUT TIMER
Key Label
2-Tone, 5-Tone Calling
Wide/Narrow Band
Select
ATT
3.5.13
SCAN
3.6
TAG
3.6.2
TA
3.5.16
CALL CAL A
CAL B TX CH
CODE ID MR
W/N
3.5.18
3.5.19
One use of this feature is to prevent a channel
from being kept busy for an extended period by an
accidentally keyed transmitter. It can also prevent possible damage to the transceiver caused by transmitting
for an excessively long period.
Table 3-1. A sheet of labels is included with the transceiver, and the applicable label should be placed on the
key to indicate its function. Refer to the section listed
in the table for a description of the function.
There is also a penalty timer that may be programmed to prevent further transmissions for the programmed time after the transmitter is disabled.
3.5.2 BACKLIGHT ON-OFF
Refer to Section 3.3.9.
3.5.3 BANK SELECT
3.5 PROGRAMMABLE FUNCTIONS
Refer to Section 3.3.7.
3.5.1 INTRODUCTION
3.5.4 BEEP ON-OFF
The F1-F4 and
keys on the front panel
can be programmed for the functions shown in
Refer to Section 3.3.10.
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OPERATION
3.5.5 CALL GUARD TONE SELECT
transmission begins, the call cannot be canceled. Programming determines the channel on which the call is
transmitted and also if it is transmitted once or repeatedly until a control code is received.
If the transceiver has a TONE key, the Call
Guard (CTCSS) tone can be selected. This allows calls
to be placed to different mobiles or groups of mobiles
and received on different groups than is normal for the
channel. Proceed as follows:
3.5.9 LOCK KEY
Press and hold the LOCK key to lock all programmable keys except CALL MONI and EMER .
Either “LK ON” or “LK OF” is displayed to indicate
the current condition. If a locked key is pressed, all
that happens is “LOCK” is displayed.
1. Press the TONE key and “TON--x” is displayed.
2. Press the channel up/down (
) keys to
select the desired tone (“TON--1” to “TON--9”).
3. Press the TONE key again to exit this mode. Calls
are then placed on the current channel and other
channels using the new code until it is changed.
3.5.10 MONITOR MODE SELECT
4. To reselect the standard Call Guard squelch tone
programmed for the channel, select “TON--M”
using the same procedure.
3.5.11 OUTPUT POWER SELECT
Refer to Section 3.4.4.
The HIGH LOW1 and LOW2 keys can be used
to temporarily or permanently override the programmed power output for the channel. The programming of the “RF Power Selection” parameter in Table
4-2 determines operation. Pressing the key once
selects the level on the key and pressing it again
selects the programmed level.
3.5.6 CHANNEL SELECT
Refer to Section 3.3.5.
3.5.7 DTMF NUMBER SELECT
3.5.12 PRIORITY CHANNEL SELECT
If the transceiver has a DTMF key, up to seven
preprogrammed telephone numbers can be transmitted. Proceed as follows:
Pressing PRI A selects the priority A channel
and pressing PRI B selects the priority B channel.
The PRI A key can also be programmed so that pressing and holding the key makes the current channel the
priority A channel. Refer to Section 3.6.3 for more
information.
1. Press the DTMF key and the currently selected
number is indicated as “DTMF x”.
2. Press the channel up/down keys (
select a different number.
) to
3.5.13 RECEIVE ATTENUATE
3. To transmit the selected number on the current
channel, press and hold the DTMF key.
NOTE: The DTMF 6 number is used for emergency
calls and the DTMF 7 number is used for automatic
logging. Therefore, if these features are used, the
number may not be available for regular calls.
Pressing the ATT key turns receive signal
attenuation on and off. Either “AT ON” or “AT OF” is
displayed to indicate the current mode. The attenuator
can be turned on if nearby strong RF signals such as
commercial radio stations or pager transmitters are
causing distortion of the receive signal.
3.5.8 EMERGENCY KEY
3.5.14 SCAN SELECT
Press and hold the EMER key to transmit an
emergency call. To cancel this call before it is transmitted, press and hold this key again. Once emergency
Pressing the SCAN key turns the channel scan
feature on and off. Refer to Section 3.6 for more
information.
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3-6
OPERATION
3.5.15 SCAN LIST PROGRAMMING
display briefly indicates “WIDE” or “NARROW” to
indicate the current mode. Each channel can also be
programmed for wide or narrow band operation, and
this switch toggles that setting. However, the change is
only temporary because the programmed condition is
reselected if the channel is changed or power is cycled.
Pressing the TAG key changes the scan list status of the current channel. Refer to the scan list
description in Section 3.6.2 for more information.
3.5.16 TALK-AROUND SELECT
The talk-around mode causes transmissions to
occur on the receive frequency to permit direct
mobile-to-mobile communication when a repeater is
being used. The talk-around mode is turned on and off
by pressing the TA key. Either “AR ON” or “AR
OF” is briefly displayed to indicate the current mode.
Changing the channel or turning power off causes talkaround to revert to the off condition.
3.6 CHANNEL SCAN
3.6.1 INTRODUCTION
The channel scan feature monitors the channels in
the current scan list. When a message is detected that
the transceiver is programmed to receive, scanning
stops and the message is received. Shortly after the
message is complete, scanning resumes (after the
resume timer counts down). The selected channel
changes to that of the call.
3.5.17 2-TONE CALLING FEATURES
If the optional 2-tone signaling option is used,
pressing the CALL key transmits the 2-tone codes on
the selected channel or on a non-busy channel if
pressed while scanning.
If the microphone is taken off-hook or the transmitter is keyed while scanning, scanning resumes
when the auto reset timer selected for the channel
counts down. Scanning does restart if this timer is disabled or if the Scan A key is programmed with poweron scan disabled (see Tables 4-2 and 4-5).
3.5.18 5-TONE CALLING FEATURES
If the optional 5-tone signaling option is used, the
following keys may be programmed to control various
functions.
Scanning is turned on and off by the SCAN key.
The transceiver also may be programmed so that scanning automatically turns on whenever power is turned
on or the microphone is placed on-hook. The microphone must be on-hook for scanning to occur.
CALL CAL A CAL B - Transmit the 5-tone call.
Depending on your signaling system, call transmission
may be necessary before you call another station. The
CAL A and CAL B keys may be programmed when
selective Individual/Group calls are used.
The decimal point in the display flashes when the
scan mode is enabled. Then when scanning is actually
occurring, either the scan list identification (see next
section) or the rapidly cycling channel identification is
displayed as the channels are scanned. Programming
determines which occurs (see Table 4-5).
TX CH - Selects the 5-tone code to be transmitted. To
change the contents of the station code, push and hold
this key and then press the
keys.
CODE
- Selects the transmit code directory.
3.6.2 SCAN LISTS
- Recalls last five codes received. Press and
hold to erase all codes. To scroll, press
.
MR CH
Up to five scan lists can be selected by pressing
and holding the SCAN key until the scan list identification appears and then pressing the
keys.
Press the SCAN key again to exit this mode (this also
occurs automatically in about 30 seconds) and again to
enable scanning (if desired).
3.5.19 WIDE/NARROW BAND SELECT
Pressing the W/N key switches the receiver
between narrowband and wideband operation. The
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OPERATION
messages on other channels. If priority sampling is
used, a priority A channel is designated by programming. If the PRI A key is available, pressing that key
selects the priority A channel. This key also may be
programmed so that if it is pressed and held, the priority A channel changes to the current channel.
The scan lists are user programmable if the
key is available. Pressing this key changes the
status of the displayed channel in the current scan list
only. The display indicates “SC ON” if the channel
was just added to the scan list and “SC OF” if it was
just deleted. In addition, the scan list status is indicated
by the decimal point in the display. This indicator is on
when the displayed channel is scanned. The decimal
point flashes when scanning is occurring.
TAG
Sampling of the priority A channel occurs only
when scanning is enabled. It does not occur while
transmitting. When the priority channel is sampled
while listening to a message on another channel, a
series of “ticks” are heard. These ticks are brief interruptions of the audio signal that occur while the transceiver changes channels to check the priority channel.
The scan list status of a channel can be changed
while scanning only when listening to a message on
the channel. The current status of all the lists is stored
in memory. Therefore, the status of the various scan
lists does not change when power is turned off.
Another priority channel also can be programmed
that can be quickly selected by the PRI B key. This
channel is programmed only to allow quick selection
and is not sampled while listening to a non-priority
channel.
3.6.3 PRIORITY CHANNEL SAMPLING
Priority channel sampling ensures that messages
on priority channels are not missed while listening to
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3-8
PROGRAMMING
SECTION 4 PROGRAMMING
Programming Cable
(Includes Level Convert. Circuit)
P.N. 585-7500-031
Female DB9 Plug To Computer
Adapter Cable
P.N. 585-7600-031
Figure 4-1 Programming Setup
4.1 GENERAL
connect the computer to the transceiver. The programming cable has a female DB9 connector which plugs
into the serial port of the computer. In this connector is
a level converter circuit which converts the RS-232
levels of the computer to the logic levels required by
the transceiver. The other end of the cable plugs into
the adapter cable which adapts the miniature phone
plug to the modular-style microphone connector on the
transceiver. Turn transceiver power on after these
cables are connected.
4.1.1 PROGRAMMING SETUP
The following items are required to program this
transceiver. The part numbers of the programming
cable and software are shown in Table 1-1. A printer is
also recommended for making a hard copy record of
the information programmed into the transceiver. The
programming setup is shown above.
•
•
•
•
IBM® PC AT or PS/2 compatible computer with
one available serial port
MS-DOS® version 5.02 or higher or equivalent
E.F. Johnson programming cable (includes required
level converter circuit) and adapter cable
E.F. Johnson programming software
4.1.3 PROGRAMMING SOFTWARE
The programming software is distributed on a
3-1/2” 1.44 M diskette. This diskette includes the main
executable program RP7600.EXE and several ancillary files it requires to run. These files total approximately 430k in size. Also included on this disk is the
ADJUST program used to tune the transceiver. This
program and other files it requires to run total about
180k in size and are located in a separate subdirectory
4.1.2 PROGRAMMING CABLES
Programming Cable, Part No. 585-7500-031, and
Adapter Cable, Part No. 585-7600-031, are required to
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Part No. 001-7600-001
PROGRAMMING
on the disk called ADJ. The use of this program is
described in Section 5.
These are DOS programs, so Windows® 3.x, 95,
or NT are not required to run them. If the program
does not run properly in Windows, run it in the DOS
mode.
•
The Space or backspace key toggle the setting.
•
Use the File menu to save the data and exit the
program.
4.4 MENU FLOW
4.4.1 INTRODUCTION
Before you use the program, the files on the diskette should be copied to your hard disk or a programming disk. Do not use the distribution disk for programming or transceiver tuning because it should be
kept as a backup in case something happens to the program on the working disk.
The menu bar along the top of the screen is used
to select the various menus that are used to program
this transceiver. Press the ALT or ESC key to enable
this menu bar. Then to move horizontally to select a
menu, use the arrow (← → ) keys or type the highlighted letter in the title. Then to display the menu and
highlight the desired item, use the arrow (↓ ↑) keys
and then press ENTER to select it. The following
describes each of the menus that can be selected.
4.2 STARTING THE PROGRAM
Proceed as follows:
1. Start the computer in the DOS mode. If the program
is not installed on a hard drive, insert the programming disk in drive A.
4.4.2 FILE MENU
2. Make the directory of the program the current directory. Then start the program by typing RP7600
(Enter).
3. The Memory Channel screen described in Section
4.4.3 is then displayed. Set or modify the data as
desired. Make sure to scroll right using the → key so
the right-most screen parameters can be
programmed.
Load - Loads data from a previously saved data file.
To display the directory, press (Enter) again.
4.3 SPECIAL KEYS AND FUNCTIONS
•
Save - Saves the current data to the specified file. The
extension “.ICF” is automatically added to the file
name.
Information on the various parameters is available
in the form of help screens. To display information
on the currently highlighted function or setting,
press F1.
•
Pressing ALT or ESC selects the menu on top or
returns to the previous screen.
•
↑ ↓ keys or highlighted character keys move the
cursor.
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Part No. 001-7600-001
Delete - Deletes the current file.
Dos - Allows you to go to the DOS mode to perform a
function in DOS such as copying a file. To return to
the previous screen, type EXIT.
Exit - Quits the program and exits to DOS.
4-2
PROGRAMMING
4.4.3 SCREEN MENU
Common - Displays the screen shown in Table 4-7
which programs miscellaneous information such as
various timer settings.
Expert - Displays the screen shown in Table 4-8
which programs various timers and other information.
Normally, the default value in this screen should not
be changed.
4.4.4 PROGRAM MENU
LMR (U.S.) Format
NOTE: The Screen menu for PMR (European) models
is slightly different than the LMR version shown
above. Refer to Section 4.5 for more information on
PMR models.
Read ← TR - Reads the data programmed in the connected transceiver.
Memory Channel - Displays the screen shown in
Table 4-1 which is used to program channel parameters such as frequency, Call Guard (CTCSS/DCTS)
coding, and power output. The screen in Table 4-1 is
for LMR models; refer to Section 4.5 for information
on the PMR version.
Write → TR - Programs the connected transceiver
with the current data.
Information - Displays information on the connected
transceiver such as the model, revision, and the “Program Comment” programmed in the Common screen
(see Table 4-7).
Key and Display Assign - Displays the screen shown
in Table 4-2 which assigns functions to the
programmable keys.
4.4.5 PRINT MENU
DTMF Autodial - Displays the screen shown in Table
4-3 which programs five DTMF code channels (prestored telephone or other numbers). Up to 24 characters can be programmed in each location.
Continuous Tone - Displays the screen shown in
Table 4-4 which programs nine user selectable Call
Guard (CTCSS) tones.
Current - Prints the currently displayed data.
Scan List - Displays the screen shown in Table 4-5
which programs various parameters for each scan list.
All - Prints all data for the selected file.
4.4.6 MODEL MENU
2-Tone Code Channel - Displays the screen shown in
Table 4-6 which programs transceiver operation with a
2-tone option. The optional 2/5-Tone Decoder Kit,
Part No. 585-7500-026, is required to use the 2-tone
function. This screen is displayed with LMR models
only (see Section 4.4.6).
LMR - Selects LMR (U.S.A.) models. Selecting this
model displays unique parameters in various screens
for programming a 2-tone option. The differences are
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PROGRAMMING
Refer to Section 4.5 for more information on PMR
models.
4.4.7 SETUP MENU
in the Screen menu (see Section 4.4.3), Memory
Channel screen (see Table 4-1), and DTMF Autodial
screen (see Table 4-3).
PMR - Selects PMR (European) models. Selecting
this model displays unique parameters for programming a 5-tone option. As with the LMR selection,
unique parameters are displayed in the Screen menu
and Memory Channel and DTMF Autodial screens.
Display Type - Select the color or monochrome 1 or 2
display modes.
RS-232C - Selects the computer serial port being used
to connect the computer to the transceiver.
Table 4-1 Memory Channel Screen Description (LMR Models)
Parameter
Description
NOTE: To display this part of the screen, scroll over using the → arrow key.
Bank Select
Up to 32 channels or two banks of 16 channels can be programmed. To program the channels as two banks, first
program the “MR-CH Bank/Free” parameter in the Key and Display Assign screen for “Bank” as described in Table 4-2. In
addition, a “Bank” option switch must be programmed in this screen to select banks. To switch between banks when
programming channels, press the PgUp/PgDn keys.
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PROGRAMMING
Table 4-1 Memory Channel Screen Description (LMR Models) (Continued)
Parameter
Ch Atr
(Channel
Attribute)
Description
Press (Enter) to display the menu which selects one of the following choices:
A: Priority A - The channel is selected when the Prio A key is pressed, and it is monitored during priority scan.
In addition, the microphone hanger can be programmed so that this channel is automatically selected whenever an off-hook condition occurs (see Table 4-2).
B: Priority B - The channel is quick selected when the Prio B key is pressed. It is not monitored during priority
scan.
E: Emergency Channel - Transmission occurs on the channel when the Emergency switch is pressed.
Emergency Off - Deletes the emergency designation on current channel if applicable. If no emergency channel
is designated, transmission occurs on the currently selected channel.
SmarTrunk II™ On/Off - Toggles the SmarTrunk function on and off on the bank. This function is not
available with this transceiver.
Channel Insert - Inserts a blank channel by pushing the other channel information down one line.
Channel Delete - Deletes the programming information on the current line and moves the channel information
below it up one line.
Return - Exits the menu and returns to the main screen.
Frequency Enter the desired frequency for the channel. Enter a frequency within the frequency range of the transceiver:
(Rx/Tx) VHF = 136-155 or 146-174 MHz, UHF = 400-430, 450-470, 470-490, or 488-512 MHz. Channel steps in multiples of 5.0, 6.25, or 7.5 kHz only. If no receive frequency is entered, no other data can be programmed on the
line. Other special functions associated with frequency are as follows:
Rx Freq - Press the backspace key to toggle between wide and narrowband. Narrowband is indicated by “n” to
the right of the frequency. Press the spacebar to toggle receive inhibit on and off indicated by “i” to the left
of the frequency. This limits the channel to priority or emergency use only (it is not available as a regular
channel).
Tx Freq - To enter the same frequency as the receive frequency, enter nothing or “=”. The “←” symbol means
same as receive frequency. Enter a space to disable transmitting on the channel (“Inhibit” is then displayed).
F8 and F9 can be used to cut and paste frequencies. Press (Enter) when the desired frequency has been
entered.
CTCSS/ Enters the receive and transmit tone (CTCSS) Call Guard® frequency or digital (DTCS) Call Guard code. Press
(Enter) to display the tone selection table. Select a tone by scrolling to it and pressing (Enter). Press the spaceDTCS
(Rx/Tx) bar or backspace key to increase or decrease the entered frequency. The “←” symbol means same as receive
code.
The length of the CTCSS reverse burst can be set by the “CTCSS Reverse Burst” parameter on the Common
Screen (see Table 4-7). A non-standard CTCSS tone from 60.1 to 300.1 Hz can be specified on the Expert
screen and then selected by “USER”. If a CTCSS tone is selected by the TONE option switch, it overrides the
channel programming until “TON--M” is reselected.
Digital codes must always be entered directly (there is no table) and tone frequencies can be entered directly. Be
sure to enter the tone decimal point or the number is interpreted as a digital code. To toggle the polarity of digital codes, press the spacebar or backspace key. The N or I indicates Normal or Inverted polarity. In
addition, the polarity of digital Call Guard signaling for all channels is set on the Expert screen.
Text
Programs the 7-character alpha tag that is displayed when a channel is selected. If no text is programmed, the
channel number is displayed as CH-xx. Allowable characters are A-Z (upper or lower case), 0-9, ’ * , + $ ’ ( ) –
/ < = > ? @ [ \ ] _ { | } ~. However, some characters, especially lower case letters, may be difficult to see. The tx
up arrow is displayed by “:” , and the rx down arrow by “;”. Special characters may be programmed in the
Expert screen (see Table 4-8) and used for the positions 3-7 only (positions 1 and 2 can display only regular
characters). To enter a special character, press PgUp/PgDn to scroll through and select characters A-P.
TOT
Disables the transmitter on that channel if it is keyed continuously for longer than the programmed time. The
(Time-Out times for this timer and other related functions are programmed in the Common Screen (see Table 4-7).
Timer)
Smartrunk II™ is a trademark of Smartrunk Systems Inc.
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PROGRAMMING
Table 4-1 Memory Channel Screen Description (LMR Models) (Continued)
Parameter
Description
RF PWR
Programs the RF power output for the channel (High, Low1, Low2). This setting can be temporarily or permanently overridden by the HIGH, LOW1, or LOW2 power option switch if it is programmed (see Table 4-2).
Lockout Transmit Disable On Busy. The following conditions can be programmed:
Off - No restrictions; the transmitter can be keyed even while receiving a signal.
Busy - Transmitting is inhibited if the channel is busy (carrier present).
Repeater 1 - Transmission is permitted only when (1) receiving a signal on the programmed Call Guard tone or
code (CTCSS/ DCTS) or (2) when no carrier is being detected.
Repeater 2 - Transmission is permitted when (1) receiving any Call Guard tone or code (CTCSS/DCTS) or (2)
when no carrier is being detected.
NOTE: If an attempt is made to transmit in a lockout condition, transmitting is inhibited for the “Lockout
Penalty Time” programmed on Common screen (see Table 4-7).
Scan
Assigns the channel to up to five scan lists and also programs if the scan list status can be changed by the scan
list programming key (TAG). Press the spacebar to enter or delete all lists or press 1-5 to toggle the status of a
list. Press the backspace key to toggle the inhibit status. Scan list programming is inhibited when parentheses
are displayed around the numbers (or underline characters).
Auto Reset If PWR ON Scan is enabled in the Scan screen (see Table 4-5), this selects the time delay before scanning
resumes after a call is complete (the signal disappears) or a key is pressed. Either Timer A or Timer B can be
selected. These timers are programmed in the Common Screen (see Table 4-7). Auto reset can be turned off by
setting the timer to “Off” (0).
2-Tone
Enables 2-tone operation on the channel and specifies the 2-tone code used. The 2-tone codes are programmed
in the 2-Tone Code Ch screen (see Table 4-6). This requires the optional 2/5-tone module.
Log On/Off Specifies if the DTMF ID code is transmitted when the PTT switch is pressed and released. The DTMF code is
specified on the Log/ID line of the DTMF Autodial screen (Table 4-3). In the Common screen, if “TOT Timer
ID Out” is “Yes”, this ID is also transmitted just before the transmitter is disabled by the time-out timer. The
following conditions can be programmed:
OFF (blank) - No ID code is transmitted.
Log In - The ID code is transmitted when the PTT switch is pressed.
Log Off - The ID code is transmitted when the PTT switch is released.
Both - The ID code is transmitted when the PTT switch is pressed and again when it is released.
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PROGRAMMING
Table 4-2 Key and Display Assign Screen Description
KEY ASSIGN PARAMETERS
The
and F1-F4 option keys can be programmed for the following functions. Press the (Enter) key and then
PgUp/PgDn to display and then select the desired function.
Parameter
Key
Label
Null
CH Up
CH Down
MR-CH 1
MR-CH 2
MR-CH 3
MR-CH 4
Bank
--CH UP
CH DN
CH 1
CH 2
CH 3
CH 4
BANK
Scan A
SCAN
Scan B
Start/Stop
Scan Add/ TAG
Delete
Prio A
PRI A
Prio A (Re) PRI A
PRI B
Prio B
Moni
(Audi)
MONI
Description
No function (key disabled).
Scroll up or down through the programmed channels. Holding the key down causes the function to
repeat.
Directly selects Channels 1, 2, 3, or 4, respectively.
Toggles the current bank between Bank 1 and Bank 2. This key can be programmed only if the “MRCH Bank/Free” parameter in this screen is programmed “Bank”.
Pressing this key toggles scanning on and off. In addition, pressing and holding the key enables the
scan list select mode. The current scan list is indicated, and it is changed by pressing the up/down
keys. Either the Scan A or Scan B mode or both can be programmed. Operation is as follows:
Scan A
Power-On Scan “Off” (see Table 4-5) - It starts and stops scanning with no auto restart. If the transmitter is keyed during scanning, the scan mode is exited.
Power-On Scan “On” - It stops scanning only until the Auto Reset Timer expires (see Table 4-7). If
the transmitter is keyed during scanning, scan automatically resumes when the Auto Reset Timer
expires.
Scan B
Power-On Scan “Off” or “On” - It starts and stops scanning with auto restart. If the transmitter is
keyed during scanning, scan automatically resumes when the Auto Reset Timer expires.
Scan list programming key. Pressing this key changes the scan list status of the current channel in the
current scan list (see Section 3.6.2).
Pressing a Prio A key selects the Priority A channel, and pressing a Prio B key selects the Priority B
channel. Pressing a Prio A (Rewrite) key also selects the Priority A channel. In addition, if it is held, the
current channel is made the Priority A channel. Priority channel sampling is programmed in the Scan
List screen (see Table 4-5).
Toggles the monitor mode on and off. This mode deactivates the Call Guard (CTCSS/DTCSS) or
2-tone mute functions (see Section 3.4.4). Pressing and holding this key unsquelches the receiver for as
long as it is held.
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Table 4-2 Key and Display Assign Screen Description (Continued)
Parameter
Key
Label
RF ATT
Lock
ATT
LOCK
Beep
Light
Bank Up
High
Low 1
Low 2
BEEP
LITE
HIGH
LOW1
LOW2
C. Tone
CH Ent
TONE
Talk
Around
Wide/
Narrow
TA
Description
Toggles the receive attenuate function on and off (see Section 3.5.13).
Locks/unlocks all programmable keys except CALL, MONI, and EMER to prevent them from being
accidentally pressed (see Section 3.5.9).
Toggles the key beep function on and off (see Section 3.3.10).
Turns the LCD backlight on and off (see Section 3.3.9).
Selects the other bank of sixteen channels if applicable.
Changes the power output for the current channel to the level programmed of the key. Pressing the key
again reselects the preprogrammed power level for the channel. The change may be temporary or permanent for that channel depending on the programming of the “RF PWR Selection” parameter later in
this screen (see description which follows).
(Continuous Tone Memory Channel) This key selects the continuous tone mode which allows the Call
Guard (CTCSS) tone to be selected from the front panel (see Section 3.5.5). These tones are programmed by the Continuous Tone screen described in Table 4-4.
Toggles the talk-around mode on and off (see Section 3.5.16).
Temporarily toggles between the wide and narrow band modes (see Section 3.5.19). When the channel
is changed or power is cycled, the wide/narrow mode programmed for the channel frequency specified
in the memory Channel screen is again selected.
DTMF
DTMF Pressing this key enables the DTMF autodial mode. After pressing this key, the number to be dialed is
selected by the up/down
keys. Then press and hold this key to transmit the number (see SecAutodial
tion 3.5.7). The available DTMF numbers are programmed by the DTMF Autodial screen described in
Table 4-3.
Emergency EMER Pressing this key transmits an emergency call. If “Single” is programmed, it is transmitted only once; if
“Repeat” is programmed, it is transmitted repeatedly with LMR models, or until the proper 5-tone code
Single
is received with PMR models. The emergency channel is specified by the CH Atr parameter on the
Repeat
Memory Channel screen described in Table 4-1. A DTMF code is transmitted if it is entered on the
“Emergency” line of the DTMF Autodial screen (see Table 4-3). Additional emergency parameters are
programmed in the Expert screen described in Table 4-8.
OPTx Out OPT1 A “OPT1-OPT3 Out” key switches the respective pin of the 30-pin option connector high or low (this
OPT2 connector is located inside the transceiver, and is used, for example, by the optional 2/5-tone module).
OPT3 A “OPT1-OPT3 Momentary Out” key produces a high or low pulse on the respective pin of this 30-pin
OPTx
connector.
Mom Out
Call
CALL When equipped with the optional 2/5-tone module, transmits the 2-tone or 5-tone code.
Call A/B CALL PMR mode w/5-tone option only. Transmits code using channel 30 (A) or 29 (B).
Tx Code/ TX CH PMR mode w/5-tone option only. Selects transmit 5-tone code.
CH Up/Dn
ID MR
ID MR PMR mode w/5-tone option only. Recalls and erases stored codes that have been received
Select
This switch is for a SmarTrunk function, so it is not available with this transceiver.
Trunking GRP
Group
Switch
OTHER MENU PARAMETERS
Any or none of the following hanger functions can be programmed:
Hanger
Action
Monitor - Disables CTCSS/DCTS Call Guard signaling on off-hook and re-enables it when back on-hook.
Scan - Automatically enables scanning when placed on-hook.
Prio A - Automatically selects the priority A channel when taken off-hook.
Beep On/ Enables or disables the key press beep. This programming can be overridden by the power-on menu (see Section
3.3.4) or BEEP key (see Section 3.3.10).
Off
W/N
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Table 4-2 Key and Display Assign Screen Description (Continued)
Parameter
Description
Enables or disables the display and key backlight. This programming can be overridden by the power-on menu
(see Section 3.3.4) or LITE key (see Section 3.3.9). The “Auto” configuration allows it to be controlled by pin 1
of the DB9 connector on the optional accessory cable. The on condition is selected by 0 volts (low) and off by 12
volts (high).
RF Power This can be programmed for one of the following configurations:
Selection MR CH Individual - The power output selected by the HIGH, LOW1, LOW2 keys (see preceding description)
is only temporary. Power returns to the level programmed for the channel when the channel is changed or
transceiver power is cycled.
Override - The power output selected by above power keys overrides the channel programming. The selected
level is permanent on the channel (changing the channel or cycling power does not change the selected power
level). Pressing the key again on the channel reselects the preprogrammed level.
MR-CH
Free - Select if banks are not used. One block of up to 32 channels is programmed.
Bank/Free Bank - Select if channels are to be programmed as two banks with up to 16 channels each. The BANK option
switch must be programmed to select the banks (see Section 3.3.7).
Opening If text is entered, it is displayed and a tone sounds for 2 seconds when power is turned on. If no text is programmed, no tone sounds and no message is displayed. The characters and other information described for
Text
“TEXT” in Table 4-1 also applies to this text.
Light
Table 4-3 DTMF Autodial Screen Description
This screen is used to program the DTMF autodial codes that can be transmitted by pressing the DTMF key (see Table
4-2). Each location can contain up to 16 characters. Allowable characters are 0-9, A-D, *, and #. Press the INS key to toggle
between the insert and overwrite modes. To clear a location, press the spacebar and then (Enter). Press ALT or ESC to cancel
the entered codes before input. The code on the “Emergency” line is transmitted when the Emergency key is pressed (see
Table 4-2). Likewise, the code on the “Log/ID” line is transmitted when the Log/ID channel parameter is enabled (see Table
4-1) and when the time-out timer expires (see Table 4-7). With PMR models, “4” and “5” are displayed in place of “Emergency” and “Log/ID”.
Parameter
Description
Sets the time interval in seconds for each code emission and interval.
DTMF
Timer
1st Timer Sets the tone period in seconds for the first DTMF code. This period is affected by the scanning period and
power saver function delays of receiving transceivers.
[*] [#] Timer Sets the tone period in seconds for the * character (same as “E”) and # (same as “F”). These codes can be used
for control codes on some systems. NOTE: When these special codes are used for the first code, the “1st
Timer” has priority over this setting.
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Table 4-4 Continuous Tone Screen Description
Description
The continuous tones programmed in this screen are selected by pressing the C.Tone CH Ent function key (see
Table 4-2) and then pressing the up/down
keys. This allows the user to select the continuous tone being transmitted
and received on the current channel. To transmit or receive using the codes programmed for the channel in the channel screen
(see Table 4-1), select “TON--M” using the
keys.
Table 4-5 Scan Function Screen Description
Parameter
Description
This screen is used to configure each of the up to five scan lists that can be selected. Channels are assigned to a scan list
in the Memory Channel screen described in Table 4-1 and by the TAG key described in Table 4-2. Scanning is turned on and
off and a specific scan mode is selected by the SCAN key also described in Table 4-2. Scanning may be enabled at power on
(see following) and by placing the microphone on-hook (see “Hanger Action” in Table 4-2).
Scan Mode The following conditions are programmable:
Scan Off - Deactivates that scan list so that it cannot be selected.
M1 (Normal) - Selects normal (non-priority) scanning from the lowest to highest channel.
M2 (Prio A) - Selects scanning from the lowest to highest channel while checking the Priority A channel. If
scanning is turned off while receiving a message in the scan mode, the transceiver switches to that channel.
M 3 (Prio A) - Same as Mode 2 except that if scanning is turned off while receiving a message, the Priority A
channel is selected.
Programs the text that is displayed while scanning with that scan list selected. If “OFF” is programmed, the text
Text
is not displayed. Instead, the alpha tag (or channel number) programmed for each channel is displayed as the
channel is scanned. The characters and other information described for “TEXT” in Table 4-1 also applies to this
text.
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Table 4-5 Scan Function Screen Description (Continued)
Parameter
Description
Stop Timer When Mode 2 or 3 above is programmed (priority scanning), this sets how often in seconds the priority channel
is checked while receiving a message on some other channel.
Resume This sets the scan resume delay in seconds. This is the time that elapses before scanning resumes after a
message is received.
Timer
PWR ON If this function is programmed “On”, scanning starts automatically when transceiver power is turned on. The
“Hanger Action” parameter in Table 4-2 should also be programmed for “Scan” if power-on scan is used. If
Scan
scanning halts to transmit a message, the timer selected for Auto Reset parameter in the channel screen (see
Table 4-1) determines the delay before scanning resumes. See also Scan A/B function in Key Assign screen
(Table 4-2), “Scan” column in 2-Tone Code CH screen (Table 4-6), “Timer A/B” in Common screen
(Table 4-7), and “Fast/Slow Scan Timer” in Expert screen (Table 4-8).
Auto CH The parameter is displayed only in the PMR (European) mode, and is used with the 5-tone option. If “On” is
programmed, pressing the CALL key (1) starts scanning, (2) detects a non-busy channel, and (3) transmits the
Call
5-tone codes.
Table 4-6 2-Tone Code Channel Screen Description
NOTE: Optional
2/5-Tone Module,
P.N. 585-7500026, is required to
utilize the twotone feature.
Parameter
Description
Rx Freq Sets the frequencies for the first and second tones from 250-3300 Hz. The closest tone is selected.
1st/2nd
Group Call Programs if the 1st or 2nd tone is used for the group code.
Programs the text that is displayed when a matched 2-tone is received. The characters and other information
Text
described for “TEXT” in Table 4-1 also applies to this text.
Selects the bell indicator condition when receiving a matched 2-tone. The following conditions can be
Bell
programmed:
Null - The bell indicator condition is not changed, even when a matched code is received.
Off - The bell indicator goes off.
On - The bell indicator appears until a key is pressed.
Blink - The bell indicator blinks until a key is pressed.
Turns the Answer Back function on and off. This function transmits a 1 kHz single tone for 2 seconds when
ANS
receiving a matched 2-tone code.
“On” activates an external alert such as a horn or buzzer when a matching 2-tone code is received. The activaEXO
tion time is set by “EXO Timer” in the Rx Code Common screen (see below). The optional accessory cable is
required to utilize this feature.
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Table 4-6 2-Tone Code Channel Screen Description (Continued)
Parameter
Description
Beep
Emits (or turns off) the following beeps when receiving a matched 2-tone:
Null - Beep emission (or non-emission) is retained even when receiving a matched 2-tone.
Off - Repeater beep emission is turned off.
Pi (Single) - One high beep once.
PiPi (Single) - Two high beeps once.
PiRo (Single) - One high and one low beep three times.
Pi (Repeat) - One high beep repeated at selected intervals.
PiPi (Repeat) - Two high beeps repeated at selected intervals.
Sets the transceiver to the transmit condition (by activating the microphone PTT) when receiving a matched
2-tone code. This transmit time can be set in the Auto Tx Timer parameter in the Rx Code Common screen (see
below).
When a matched 2-tone is received, the transceiver is set to the following condition that is programmed:
Off - The transceiver can be used continuously.
Kill - The transceiver cannot be used. Reprogramming is required to re-activate the transceiver.
Stun - The power-on password prompt is displayed. To use the transceiver, the correct password must be
entered. See also “User Password” and “Pwr On Password” in Common screen (Table 4-7). Password entry is
required regardless of the Pwr On Password setting.
When a matched 2-tone is received, scan is set to the following condition that is programmed:
Null - Scan condition is not affected.
Cancel - Scan is cancelled.
Start - Scan is started.
See also “Scan” key in Table 4-2 and “Power On Scan” in Table 4-5.
Auto Tx
Stun
Scan
Parameter
Description
Rx Code Common Screen
Notone This item sets the acceptable period between 2 tones. When received tones are interrupted for longer than this
setting, the transceiver does not detect the code.
Timer
Programs the 2-tone decoding period in seconds. When the received tone is longer than this setting, the transGroup
ceiver detects the tone as a group code.
Timer
EXO Timer When the EXO function is programmed “On” (see EXO above), the horn drive out pin of the optional accessory
cable is grounded for this period when receiving a matched 2-tone code.
Beep Repeat When “Repeat” is selected for the above “Beep” parameter, beeps are repeated at this period in seconds.
Timer
Auto Tx When the Auto TX function above is programmed “On”, the transceiver transmits for this set period when
receiving a matched 2-tone code.
Timer
Tx Code Screen
Code Type Selects the “Individual” or “Group” code type.
1st/2nd Tone Sets the frequencies for the first and second tones from 250-3300 Hz. The closest tone is selected.
Frequency
1st/2nd Tone Sets the period of the first and second tones.
Period
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PROGRAMMING
Table 4-7 Common Screen Description
Parameter
Description
Programs the password that must be entered at power on if the following “PWR ON Password” parameter is
User
Password “On” or to cancel the “STUN” condition described in Table 4-6. Any four-digit number from 0000-9999 can be
programmed. The password is entered as described in Section 3.3.2.
Program Allows a comment to be programmed in the file for use in quickly identifying the contents of a transceiver.
Comment When a transceiver is connected to the computer, the comment can be checked without reading all programmed
data by selecting “Information” in the Program menu (see Section 4.4.4).
AF Min Sets the minimum audio level that can be selected by the user. The level can be set in 32 steps with 0 the lowest
level. This setting can be overridden by pressing the F1 in the power-on menu (see Section 3.3.4).
Level
SQL Level Sets the squelch level in up to 255 steps (0 sets the maximum unsquelched level). This adjustment can be more
accurately made by pressing F4 in the power-on menu (see Section 3.3.4).
This parameter can be used to disable the high-pass filter that removes the Call Guard (CTCSS/DTCS) signal
Rx AF
from the audio. It should be programmed “On” if Call Guard squelch is used.
Switch
Auto Reset These timer settings are used by the “Auto Reset” parameter in the channel screen (see Table 4-1). These times
Timer A/B set the delay in returning to the mute mode or “Power On Scan” after receiving a message or pressing a key. To
disable the Auto Reset function, set one of these timers to “Off” (0) and select it in the channel screen.
Inactive This feature is available with the PMR (European) mode only. It sets the time in seconds to return to the
“Inaudible” mode after the “Audible” mode is selected. To turn off the inactive timer function, do not assign
Timer
“Inactive” in the channel screen.
Programs the time-out timer time in seconds. If the transmitter is keyed continuously for longer than this time,
TOT
the transmitter is disabled. The time-out timer is enabled or disabled for each channel by the TOT parameter in
Timer
the channel screen (see Table 4-1).
TOT Penalty This programs the time in seconds that the transmitter is disabled by the time-out timer. The transmitter cannot
be keyed again until this time expires.
Timer
TOT ID Out If this parameter is enabled, an DTMF ID code is automatically transmitted just before the time-out timer
disables the transmitter. This ID code is set on the Log/ID line of the DTMF Autodial screen (see Table 4-3).
TOT Beep If this parameter is enabled, warning beeps are transmitted 10 seconds before time out occurs.
Lockout This is the time that the transmitter is disabled if the user attempts to transmit while in the lockout (Transmit
Penalty Disable On Busy) condition. Transmitting is disabled for the Lockout Penalty Time even if the lockout condition is cleared. The lockout feature is programmed on the channel screen (see Table 4-1).
Timer
CTCSS If CTCSS (tone Call Guard) signaling is programmed on the channel, this sets the length of the reverse burst
Reverse that is transmitted when the PTT switch is released. The reverse burst prevents the “squelch tail” (noise burst) in
the transceiver receiving the signal.
Burst
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Table 4-7 Common Screen Description (Continued)
Parameter
Description
Power On This turns the password function on and off. When it is turned on, “PWoRd” is displayed when power is turned
Password on and a four-digit password must be entered to enable the transceiver (see Section 3.3.2). The password is programmed in “User Password” above. If the STUN function disables the transceiver (see Table 4-6), password
input is required even if this parameter is programmed “Off”.
Specifies the six-digit code that must be entered to access the following dealer set mode.
Dealer
Passcode
Set Mode This enables/disables the Dealer Set Mode which allows one transceiver to clone another with identical information. If the transceiver will not be used for cloning, the dealer set mode is not used and this parameter should
Access
be programmed “Inhibit”.
Transceiver Enables or inhibits the downloading of transceiver programming data using the programming software or when
Data Out programming one transceiver with another (cloning). This prevents the unauthorized duplication of programming data. This does not inhibit overwriting of programming data, so reprogramming is still possible with this
enabled.
Table 4-8 Expert Screen Description
Parameter
Description
Fast Scan Sets the period in seconds that each channel not programmed for CTCSS/DTCS (Call Guard) squelch is
scanned. NOTE: An appropriate time is set by default and if a time less than the default is programmed, busy
Timer
channels may not be detected.
Slow Scan Sets the period in seconds that each channel programmed for CTCSS/DTCS (Call Guard) squelch is scanned.
NOTE: An appropriate time is set by default and if a time less than the default is programmed, busy channels
Timer
may not be detected.
Tx DTCS Selecting “Inverse” selects the opposite transmit digital DTCS (Call Guard) code polarity specified for the
Inverse channel (see Table 4-1) and selecting “Normal” does not change that setting. For example, if the channel is programmed “I” (inverse), selecting “Inverse” here results in “Normal” DTCS. For DTCS signaling to work properly, the polarity of the code in the transmitting and receiving transceivers must be the same.
Rx DTCS Functions the same as the preceding “Tx DTCS Inverse” parameter to change the receive DTCS polarity.
Inverse
User CTCSS A non-standard CTCSS (Call Guard) tone from 60.1-300.1 Hz can be programmed. It is then selected by programming “USER” for the CTCSS code in the channel screen (see Table 4-1).
Freq.
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PROGRAMMING
Table 4-8 Expert Screen Description (Continued)
Parameter
Description
Emer Sw Sets the period in seconds that the Emergency function key must be pressed to activate the emergency function.
On Timer An emergency call is initiated by pressing the Emergency key for longer than this time.
Emer Sw Sets the period in seconds that the Emergency function switch must be pressed to cancel an emergency call.
Off Timer This must be done before the call is transmitted because once it is transmitted, it cannot be canceled.
Programs the delay and interval period in seconds for emergency calls. When the emergency switch is pressed
Emer
Start/Repeat and held, the emergency call is transmitted after this delay period. If the Emergency Repeat function key is programmed (see Table 4-2), the transceiver then transmits repeatedly at this interval until an “Emergency Cancel”
code is received.
Rx EXO Sets the condition of the horn output (pin 6) of the optional accessory cable in the receive mode. OFF = Horn
drive control out, ON = Send (to ground when signal is received). One use of the “ON” condition may be for
some type of simplified repeater system.
Rx EXO When Rx EXO is programmed “On”, pin 6 of the optional accessory cable is grounded for this period when
receiving a signal. Normally this parameter is set to “0”.
PTT
EXPTT Sets the period that the transmitter stays on after the receive signal disappears.
Delay Timer
Tone Mute Enables or disables the CTCSS/DTCS (Call Guard) function with an external PTT signal. “On” disables and
EXPTT “Off” enables CTCSS/DTCS.
Low Beep Sets the low beep tone frequency for 400 - 2998 Hz. The nearest available frequency is automatically selected.
Frequency
High Beep Sets the high beep tone frequency for 400 - 2998 Hz. The nearest available frequency is automatically selected.
Frequency
Character Special characters can be designed using this function by enabling the available 14 segments in any combination desired. The special characters created then can be entered when programming the “Text” parameters in the
Editor
various screens. Up to 16 characters can be programmed and stored in locations A-P. To enter a special character when programming text, press the PgUp or PgDn keys to scroll through and select the desired character.
Special characters can be displayed in positions 3-7 (1 and 2 must be standard characters).
4.5 UNIQUE PMR (EUROPEAN) SCREENS
Screen Menu - The LMR menu is described in Section 4.4.3, and the PMR version is shown below.
.
4.5.1 GENERAL
Selecting LMR or PMR in the Model menu (see
Section 4.4.6) affects what parameters are displayed in
some screens and also what additional screens are displayed. Basically, selecting the LMR (U.S.A.) model
displays parameters for the 2-tone option, and selecting PMR (European) displays parameters for the
5-tone option.
NOTE: Optional 2/5-Tone Kit, Part No. 585-7500026, is required to have the 5-tone function.
Memory Channel Screen - The LMR version of this
screen is shown in Table 4-1, and the PMR version is
shown in Figure 4-2. Refer to on-line help for information on unique PMR parameters (press F1 with the
parameter highlighted).
4.5.2 UNIQUE PMR SCREENS
The following menus and screens are different
for LMR and PMR models:
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4.6 CLONING (PROGRAMMING ONE
TRANSCEIVER WITH ANOTHER)
The following screens selected in the preceding
Screen menu are unique to PMR models. Refer to online help for information on parameters in these
screens.
One transceiver can be used to program another
with identical data. Replication Cable, Part No. 5972002-200 is required to connect the transceivers
together (see Table 1-1). The master (source) transceiver must have the following Common screen (see
Table 4-7) parameters programmed to perform
cloning:
Rx Code Channel - This screen is shown below and it
programs the receive 5-tone code information.
•
Transmit Data Out = Enabled. If this parameter is
not enabled, the transceiver does not go into the
clone mode. The programming of this parameter
does not affect the ability to receive data. Therefore,
it can be in either mode in the slave (target)
transceiver.
•
Set Mode Access = Enabled. This must be programmed to allow the Dealer Set mode to be
accessed so that cloning can be enabled.
•
Dealer Passcode. This six-digit code must be
known to enable the Dealer Set mode.
Tx Code Channel - This screen is shown below and it
programs the transmit 5-tone code information.
Proceed as follows to program one transceiver
with another:
1. Select the Dealer Set mode in the Master (source)
transceiver by turning power on with the F1 and up
key pressed.
2. The display then indicates “DEALR” which is the
prompt to enter the six-digit Dealer Passcode. Enter
this code using the F1-F4 and down
key. The
numbers represented by each key are as follows.
When the correct number is entered, “SETMODE is
displayed. If six digits have been entered and this is
not displayed, an incorrect number may have been
entered. Repeat starting with step 1. Refer to Section
3.3.2 for more information.
User Tone Format - This screen is shown below and
it programs special tone frequencies and the 5-tone
format information.
Key
F1
F2
F3
F4
Number
Entered
0
5
1
6
2
7
3
8
3. Press the F4 key to select the clone mode. The
display should indicate “CLONE”.
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PROGRAMMING
6. When cloning is complete, CLONE is displayed by
the master and CLONE OK by the slave.
4. Connect the master transceiver to the slave (target)
transceiver by plugging the cloning cable into the
microphone jack of each.
7. To clone another transceiver, repeat this procedure
starting with step 4.
5. Turn the slave transceiver on. Then momentarily
press the POWER switch of the master transceiver
to begin the data transfer.
8. To return both the transceivers to normal operation,
reconnect the microphone and cycle power.
.
Figure 4-2 Memory Channel Screen (PMR Models)
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VHF (7610) CIRCUIT DESCRIPTION
SECTION 5A VHF (7610) CIRCUIT DESCRIPTION
5.1 VHF RECEIVER CIRCUIT
frequency of the RF passband. This gives a wide bandwidth receiver good image response rejection. The
diodes are controlled by the CPU IC1 via level
controller IC5.
5.1.1 ANTENNA SWITCHING CIRCUIT
5.1.3 FIRST MIXER AND FIRST IF CIRCUITS
The antenna switching circuit functions as a lowpass filter while receiving and a resonator circuit while
transmitting. This prevents the transmit signal from
entering the receiver in the transmit mode.
The first mixer circuit converts the received signal to a fixed frequency first IF signal of 31.050 MHz.
The RF signal from the bandpass filter is applied to the
first mixer Q13. This signal is mixed with the first LO
signal from VCO Q7/Q8 and buffers Q6-Q4 to produce the IF signal.
NOTE: A VHF transceiver block diagram is located
on page 8-1.
Received signals enter the antenna connector and
pass through a low-pass filter consisting of L1-L3, C1C3, C8-C10, and C11-C13. The filtered signal is then
fed through a quarter-wave type antenna switching circuit formed by D13, D14, and L13 and applied to the
receiver RF circuit.
The 31.050 MHz first IF signal then passes
through a pair of crystal filters (FI1A/B) which suppress out-of-band signals. The filtered signal is then
amplified by first IF amplifier Q14 and applied to second IF circuit IC3.
5.1.2 RF CIRCUIT
5.1.4 SECOND IF AND DEMODULATOR
CIRCUITS
The RF circuit amplifies the frequencies that are
within the receive band range and attenuates out-ofband signals.
The second mixer circuit converts the 31.050
MHz first IF signal to a 450 kHz second IF signal. A
double-conversion superheterodyne receiver like this
improves the image rejection ratio and provides a
stable receiver gain.
The signal from the antenna switching circuit
passes through attenuator D13/D14. The attenuator
circuit functions only when the attenuator function is
assigned to a programmable key. It is enabled to minimize RF amplifier distortion caused by excessively
strong receive signals.
FM IF system IC3 contains second mixer, limiter
amplifier, quadrature detector, active filter and noise
amplifier circuits (see Figure 5-1). The first IF signal
from IF amplifier Q14 is applied to IC3, pin 16 which
is the input to the second mixer section. The 31.050
MHz first IF signal is mixed with the 30.600 MHz second LO signal to produce the 450 kHz second IF signal. The PLL reference frequency of 15.300 MHz is
doubled to produce the 30.600 MHz second LO signal.
When the attenuator function is turned on, CPU
IC1, pin 32 switches the voltage level of the “RF
ATT” line from high to low and then controls the
attenuator switch Q35. The D13/D14 current then
increases and D13/D14 act as an attenuator.
This signal is then applied to a two-stage tunable
bandpass filter controlled by D16 and D17. The filtered signals are amplified by RF amplifier Q12 and
applied to another two-stage bandpass filter controlled
by D18-D21. These filters attenuate unwanted signals.
The filtered signal is then applied to the first mixer
Q13.
The second IF signal is fed out of IC3 on pin 3
and applied to ceramic filters FI3 and FI4 with narrow
band operation or only FI4 with wideband operation
(bypassing FI3). It is then fed back into IC3 on pin 5
and applied to the limiter amplifier and quadrature
detector. The quadrature detector demodulates the
audio signal contained in the second IF signal. Components connected to pins 10 and 11 including X3
The tunable bandpass filters controlled by D16D21 employ varactor diodes to tune them to the center
5A-1
November 1998
Part No. 001-7600-001
VHF (7610) CIRCUIT DESCRIPTION
Figure 5-1 Second IF System IC3 (VHF)
Figure 5-2 Audio Switching and Amplifier Circuit (VHF)
vided by R145 and C182. The audio signal is then
applied to pin 16 of level controller IC5. This device
allows the CPU to control the speaker volume level.
The level controlled signal is fed out of IC5 on pin 15
and applied to low-pass filter IC6b. It is then applied
to AF switching circuit IC4 on pin 8, and the switched
output is on pin 9. This signal is buffered by IC6d and
then amplified by AF amplifier IC10 to provide drive
to the speaker.
are part of the quadrature detector. The audio signal is
fed out on pin 9 (IC3) and applied to the AF amplifier
circuit.
5.1.5 AUDIO AMPLIFIER CIRCUIT
The AF (audio frequency) amplifier circuit provides drive to the speaker (a block diagram is shown in
Figure 5-2). The audio signal from IC3, pin 9 is
applied to AF amplifier IC7A and then fed to pin 1 of
AF switching circuit IC4. The switched output signal
on IC4, pin 2 is then applied to high-pass filter IC8A/
B. The cut-off frequency of this filter is controlled by
the “AFHPF” line. When “AFHPF” is high, the cut-off
frequency is shifted higher to attenuate the Call Guard
(CTCSS or DTCS) signals.
5.1.6 RECEIVER MUTE CIRCUIT
Noise Squelch
The noise squelch circuit turns off the audio signal when no RF signal is being received. The squelch
circuit is controlled by the amount of noise present in
the audio signal.
The filtered output signal on IC8, pin 7 is applied
to limiter IC7b and buffer IC7c. De-emphasis is pro-
November 1998
Part No. 001-7600-001
5A-2
VHF (7610) CIRCUIT DESCRIPTION
Part of the AF signal from pin 9 of FM IF circuit
IC3 is applied to pin 24 of level controller IC5. This
device allows the CPU to control the squelch threshold
level. The level-controlled output signal on pin 23 is
applied to IC3, pin 8 which is the input of an internal
filter (see Figure 5-1). Noise frequencies of about 10
kHz are passed and then fed out on pin 7 and also
applied to an internal noise detector.
The signal is then fed to IC7b and IC7c which
provide buffering and amplification. Deviation limiting is then provided by level controller IC5. The input
to this device is pin 16 and the output is pin 15. The
signal is then fed to splatter filter IC6b and switch IC4.
The input is on pin 11 and the output is on pin 10. The
modulation signal is then applied to the PLL circuit as
“MOD”.
The detected noise signal is rectified and fed out
on pin 13 without smoothing. The noise signal (NOIS)
is then applied to pin 19 of CPU IC1. The CPU analyzes the noise condition and outputs the RMUT signal via I/O expander IC11. This signal controls AF
mute switches IC4a and c (see Figure 5-2).
Narrow band/wideband switch Q21 is connected
to the input of the splatter filter IC6b and switched by
the “NWC” signal from the I/O expander IC11. When
“NWC” is high, Q21 shifts the filter cut-off frequency
for narrow band deviation selection.
5.2.2 MODULATION CIRCUIT
Call Guard (CTCSS/DTCS) Operation
The microphone audio signal modulates the frequency of VCO Q7/Q8. The “MOD” signal from
switch IC4, pin 10 changes the reactance of diode D9
which frequency modulates the VCO frequency. The
modulated VCO signal is amplified by buffer amplifiers Q6, Q5, and Q4 and applied to the transmit driver
circuit.
The tone Call Guard squelch circuit detects AF
signals and opens the squelch only when receiving a
signal containing a matching subaudible tone or code
(CTCSS or DTCS). When tone squelch is in use and a
signal with a mismatched or no subaudible tone is
received, the tone squelch circuit mutes the AF signals
even when noise squelch is open.
5.2.3 TRANSMIT DRIVER CIRCUIT
A portion of the audio signal from amplifier IC7a
passes through low-pass filter Q5 in the front unit to
remove voice signals. It is then applied to CPU IC1 on
pin 97 via the “CTCIN” line. The CPU detects the
CTCSS or DTCS signaling and controls the AF mute
switch via I/O expander IC11.
The transmit driver circuit amplifies the VCO
oscillating signal to the level required by the power
amplifier module. The RF signal from buffer amplifier
Q4 passes through the T/R switch D5 and is amplified
by the buffer-amplifiers Q3 and Q2 and driver Q1. The
signal is then applied to the power amplifier module
IC1.
5.2 VHF TRANSMITTER CIRCUIT
5.2.4 POWER AMPLIFIER MODULE
5.2.1 MICROPHONE AMPLIFIER CIRCUIT
The microphone amplifier circuit amplifies the
microphone audio signal to the level required by the
modulation circuit and also provides pre-emphasis.
The power amplifier module amplifies the driver
signal to the output power level. The RF signal from
the driver Q1 is applied to the power module which
produces 45 watts of output power at the antenna jack.
The microphone audio signal is amplified by
IC7d, with R172 and C295 on the output providing
pre-emphasis. The microphone audio signal is then fed
to switch IC4 on pin 4 and the switched output signal
is on pin 3. This signal is then applied to high-pass filter IC8a/b which attenuates frequencies in the Call
Guard (CTCSS/DTCS) range. This is the same filter
used for receive audio filtering.
The amplified signal is fed through antenna
switching circuit D3 and D4, a low-pass filter and
APC detector, and is then applied to the antenna jack.
The collector voltage of driver Q1 and the control
voltage on pin 2 of the power module IC1 come from
APC transistors Q17 and Q18. Transmit switch Q23
turns off Q17 and Q18 when the transmitter is
disabled.
5A-3
November 1998
Part No. 001-7600-001
VHF (7610) CIRCUIT DESCRIPTION
Figure 5-3 PLL Circuit (VHF)
5.2.5 APC CIRCUIT
5.3 VHF PLL CIRCUIT
The APC (Automatic Power Control) circuit protects the power amplifier from damage caused by a
mismatched antenna load, and provides a stable power
output.
5.3.1 PLL CIRCUIT
The PLL (Phase-Locked-Loop) circuit provides a
stable (± 5 PPM) receive first injection and transmit
frequency. The PLL circuit consists of PLL circuit
IC2, a loop filter, and reference oscillator. A block diagram of the PLL circuit is shown in Figure 5-3.
Detector D2 detects forward signals, and D1
detects reverse signals. The combined voltage is at
minimum level when a matched antenna load of 50
ohms is present and then increases as it becomes mismatched. The detected voltage is applied to pin 9 of
inverse amplifier IC6c. Power setting voltage T4 is
applied to the other input (pin 10) as a reference.
The signal from VCO (Voltage-Controlled Oscillator) Q7/Q8 is buffered by Q6 and Q5 and then
applied to pin 2 of IC2. The prescaler in IC2 divides
the VCO signal down so that it is within the frequency
range of the programmable counter.
A reference frequency generated by reference
oscillator and controlled by crystal X1 is applied to pin
15 of IC1. This signal is divided down by a programmable divider and provides the reference input to the
phase detector. When the VCO is oscillating at the
correct frequency, the VCO-derived input to the phase
detector is the same frequency as the reference input.
When antenna impedance is mismatched, the
detected voltage exceeds the power setting voltage.
The output voltage on pin 8 then decreases which
turns Q18 off slightly. Q17 then turns off slightly and
lowers the voltage applied to the collector of Q1 and
the power control input of IC1. This reduces the output
power produced by these devices.
November 1998
Part No. 001-7600-001
5A-4
VHF (7610) CIRCUIT DESCRIPTION
5.4.2 VHF CPU IC1 PORT ALLOCATION
The phase detector determines the phase difference between these signals and then produces output
pulses on pin 8 which are filtered by the loop filter.
This filter consists of R43-R45, C60, and C61. The
output of this filter is the DC control voltage applied to
the VCO. The phase detector increases or decreases
this control voltage to change the VCO frequency.
Pin
No.
1
12
5.3.2 VCO CIRCUIT
13
The VCO signal is amplified by buffer amplifiers
Q6 and Q4 and is then applied to T/R switch D5 and
D6. The VCO receive injection signal is applied to
first mixer Q13 via bandpass filter L23, L24, and
C116-C118. Likewise, the VCO transmit signal is
applied to driver Q1 via buffer amplifiers Q2 and Q3.
Part of the Q6 output signal is fed back to PLL IC2 as
described in the preceding section.
14
16
17
18
19
26
32
5.4 VHF IC PIN DESCRIPTIONS
5.4.1 VHF POWER SUPPLY
Line
36
Description
37
VCC
HV
Unswitched input voltage to the transceiver.
VCC supply voltage switched by Q25 and Q26.
When the [POWER] switch is pressed, the CPU
outputs the “PWON” control signal to this circuit
to turn the HV supply on.
CPU5V Common 5V supply for the CPU produced from
the VCC supply by CPU5V regulator IC9. The
circuit outputs this voltage regardless of the
transceiver on-off condition.
8V
Common 8V supply produced from the HV
supply by 8V regulator Q36.
5V
Common 5V supply produced from the VCC
supply by 5V regulator Q29/Q30.
R5
Receive 5V supply produced by R5 regulator
Q27 using the “T5C” signal from I/O expander
IC IC11.
T5
Transmit 5V supply controlled by T5 regulator
Q28 using the “T5C” signal from I/O expander
IC11.
38
39
40
41
42
43
45,
46
4750
5A-5
Port
Name
Description
VIN
Input port for overvoltage detection from
the vehicle power source.
SCK
Outputs clock signal to EEPROM IC3,
PLL IC2 (main unit) and expanders IC5,
IC11 (main unit), etc.
SI
Input port for the data signal from
EEPROM IC3, etc.
SO
Outputs data signal to EEPROM IC3, PLL
IC2 (main unit) and expanders IC5, IC11
(main unit).
CLIN
Input port for cloning signal.
CLOUT Output port for cloning signal.
POSW Input for the POWER switch. Low =
POWER switch pushed.
NOIS
NOIS signal input port from the FM IF
IC3 (main unit) for noise squelch
operation.
PTT
Input port for the PTT switch. Low = PTT
switch pushed.
RFATT Outputs RF attenuator control signal to the
attenuator switch (Q35 on main unit).
Low = Attenuator function on.
UNLK Input port for PLL unlock signal from the
PLL IC2 (main unit). High = unlock.
PWON Outputs control signal for the power
switching circuit (Q25 on main unit) and
5V regulator Q29, Q30 (main unit).
DIM
Outputs control signal for LCD backlight.
Low = LCD backlight on.
EXTPTT Input port for the PTT switch from external connector J3 (main unit). Low = External PTT switch on.
DIM
Input port for the LCD backlight control
signal from external connector J3 (main
unit). Low = External dimmer switch on.
PLST
Outputs strobe signals for PLL IC2 (main
unit).
DAST
Outputs strobe signals for level controller
IC5 (main unit).
EXST
Outputs strobe signals for the I/O
expander IC11 (main unit).
KS1,
Output ports for the key matrix.
KS2
KR3Input ports for the key matrix.
KR10
November 1998
Part No. 001-7600-001
VHF (7610) CIRCUIT DESCRIPTION
Pin
No.
51
5254
55
90
91
9496
97
98
99
100
Port
Name
5.4.4 VHF PORT EXPANDER IC11 (MAIN UNIT)
Description
Pin
No.
BM
Outputs control signal for beep mute circuit Q10. High = Beep muted.
CTDA0- Output port for CTCSS/DTCS signals.
CTDA2
HANG Input port for the microphone hanger
detection signal. Low = Microphone on
hook.
MTONE Output port for beep audio while receiving
and 2/5 tone signals while transmitting.
TONED Outputs DTMF signals.
OPV3- Input port for option connector J2 state
OPV1
(main unit).
CTCIN Input port for the CTCSS/DTCS IN
decode signals.
SD
Input port for S-meter signal.
LVIN
Input port for PLL lock voltage.
TEMP Input port for the transceiver’s internal
temperature.
5.4.3 VHF I/O EXPANDER IC5 (MAIN UNIT)
Pin
No.
Port
Name
2, 3, T1-T3
10
11
T4
14
REF
Description
Output tunable bandpass filter control
signals.
Output port for tunable bandpass filter
control signal while receiving and power
control signal while transmitting.
Output port for reference frequency
control voltage.
November 1998
Part No. 001-7600-001
5A-6
Port
Name
4
T5C
5
TMUT
6
RM
7
MM
11
HORNO
12
AFON
13
AFHPF
14
NWC
Description
Outputs control signal for T5 and R5 regulator circuits Q27, Q28 (main unit). High =
Transmitting.
Outputs Tx mute switch Q19, Q23 (main
unit) control signal. High = Tx muted.
Outputs AF mute switch IC4 (main unit)
control signal for the receiver circuit. High
= No receive audio is emitted.
Outputs MIC mute control signal. High =
DTMF signals are output, etc.
Outputs external device control signal.
High = Matched 2/5-tone signals are
received.
Outputs control signal for the AF amplifier
regulator circuit. High = Squelch is open,
etc.
Outputs AF filter control signal. High =
Filter out CTCSS or DTCS frequency.
Outputs receive/transmit passband width
control signal. High = Narrow bandwidth
is selected.
UHF (7640) CIRCUIT DESCRIPTION
SECTION 5B UHF (7640) CIRCUIT DESCRIPTION
The tunable bandpass filters controlled by D7D10 employ varactor diodes to tune them to the center
frequency of the RF passband. This gives a wide
bandwidth receiver good image response rejection.
The diodes are controlled by the CPU IC1 via level
controller IC12.
NOTE: The UHF transceiver block diagram is located
on page 8-6.
5.5 UHF RECEIVER CIRCUIT
5.5.1 ANTENNA SWITCHING CIRCUIT
5.5.3 FIRST MIXER AND FIRST IF CIRCUITS
The antenna switching circuit functions as a lowpass filter while receiving and a resonator circuit
while transmitting. This prevents the transmit signal
from entering the receiver in the transmit mode.
The first mixer circuit converts the received signal to a fixed frequency first IF signal of 46.350 MHz.
The RF signal from the bandpass filter is applied to
the first mixer Q3. This signal is mixed with the first
LO signal from VCO Q23 and buffers Q28 and Q30 to
produce the IF signal.
Received signals enter the antenna connector and
pass through a low-pass filter consisting of L1-L3, C1,
C2, and C9-C12. The filtered signal is then fed
through a quarter-wave type antenna switching circuit
formed by D4, D5, and L15 and applied to the
receiver RF circuit.
The 46.350 MHz first IF signal then passes
through a pair of crystal filters (FI1A/B) which suppress out-of-band signals. The filtered signal is then
amplified by first IF amplifier Q4 and applied to
second IF system IC1.
5.5.2 RF CIRCUIT
5.5.4 SECOND IF AND DEMODULATOR
CIRCUITS
The RF circuit amplifies the frequencies that are
within the receive band range and attenuates out-ofband signals.
The second mixer circuit converts the 46.350
MHz first IF signal to a 450 kHz second IF signal. A
double-conversion superheterodyne receiver like this
improves the image rejection ratio and provides a
stable receiver gain.
The signal from the antenna switching circuit
passes through attenuator D4/D5. The attenuator circuit functions only when the attenuator function is
assigned to a programmable key. It is enabled to minimize RF amplifier distortion caused by excessively
strong receive signals.
FM IF system IC1 contains second mixer, limiter
amplifier, quadrature detector, active filter and noise
amplifier circuits (see Figure 5-4). The first IF signal
from IF amplifier Q4 is applied to IC1, pin 16 which
is the input to the second mixer section. The 46.350
MHz first IF signal is mixed with the 45.900 MHz
second LO signal to produce the 450 kHz second IF
signal. The PLL reference frequency of 15.300 MHz
is tripled to produce the 45.900 MHz second LO
signal.
When the attenuator function is turned on, CPU
IC1, pin 32 switches the voltage level of the “RF
ATT” line from high to low and then controls the
attenuator switch Q1. The D4/D5 current then
increases and D4/D5 act as an attenuator.
This signal is then applied to a two-stage tunable
bandpass filter controlled by D7 and D8. The filtered
signals are amplified by RF amplifier Q2 and applied
to another two-stage bandpass filter controlled by D9
and D10. These filters attenuate unwanted signals.
The filtered signal is then applied to the first mixer
Q3.
The second IF signal is fed out of IC1 on pin 3
and applied to ceramic filters FI2 and FI3 with narrow
band operation or only FI2 with wideband operation
(bypassing FI3). It is then fed back into IC1 on pin 5
5B-7
November 1998
Part No. 001-7600-001
UHF (7640) CIRCUIT DESCRIPTION
Figure 5-4 Second IF System IC1 (UHF)
Figure 5-5 Audio Switching and Amplifier Circuit (UHF)
The filtered output signal on IC6d, pin 14 is
applied to pin 8 of AF switching circuit IC11. The
switched output signal on IC11, pin 9 is then applied
to pin 16 of level controller IC12. This device allows
the CPU to control the speaker volume level. The volume controlled output on pin 15 is then applied to pin
2 of AF switching circuit IC11. The switched output
on pin 1 is applied to pin 4 of de-emphasis circuit
IC4a. The signal is then amplified by IC9 to provide
drive to the speaker.
and applied to the limiter amplifier and quadrature
detector. The quadrature detector demodulates the
audio signal contained in the second IF signal. Components connected to pins 10 and 11 including X1
are part of the quadrature detector. The audio signal is
fed out on pin 9 (IC1) and applied to the AF amplifier
circuit.
5.5.5 AUDIO AMPLIFIER CIRCUIT
5.5.6 RECEIVER MUTE CIRCUIT
The AF (audio frequency) amplifier circuit provides drive to the speaker (see block diagram in Figure
5-5). The audio signal from IC1, pin 9 is applied to AF
amplifier IC7b and then fed to high-pass filter IC6c/
IC6d. The cut-off frequency of this filter is controlled
by the “AFHPF” line. When “AFHPF” is high, the
cut-off frequency is shifted higher to attenuate the Call
Guard (CTCSS or DTCS) signals.
November 1998
Part No. 001-7600-001
Noise Squelch
The noise squelch circuit turns off the audio signal when no RF signal is being received. The squelch
circuit is controlled by the amount of noise present in
the audio signal.
5B-8
UHF (7640) CIRCUIT DESCRIPTION
Part of the AF signal from pin 9 of FM IF circuit
IC1 is applied to pin 24 of level controller IC12. This
device allows the CPU to control the squelch threshold
level. The level-controlled output signal on pin 23 is
applied to IC1, pin 8 which is the input of an internal
filter (see Figure 5-4). Noise frequencies are passed
and then fed out on pin 7 and also applied to an internal noise detector.
The output signal from IC11 on pin 10 is fed to
pin 16 of level controller IC12. This device provides
deviation control and is also used in the receive mode
to provide volume control. The level controlled output
on pin 15 is fed to pin 3 of switching circuit IC11. The
switched output (MOD) on pin 4 is then applied to the
PLL circuit (D21) where it frequency modulates the
transmit signal.
The detected noise signals are rectified and fed
out on pin 13 without smoothing. The noise signal
(NOIS) is then applied to pin 19 of CPU IC1. The
CPU analyzes the noise condition and outputs the
RMUT signal via I/O expander IC13. This signal controls AF mute switch IC11a (see Figure 5-5).
Narrow band/wideband switch Q35 is connected
to the input of the splatter filter IC7a and switched by
the “NWC” signal from the I/O expander IC13. When
“NWC” is high, Q35 shifts the filter cut-off frequency
for narrow band deviation selection.
5.6.2 MODULATION CIRCUIT
Call Guard (CTCSS/DTCS) Operation
The microphone audio signal modulates the frequency of transmit VCO Q25. The “MOD” signal
from switch IC11, pin 4 changes the reactance of
diode D21 and this modulates the frequency of transmit VCO Q25. The modulated VCO signal is amplified by buffer amplifiers Q28 and Q30 and applied to
the transmit driver circuit (Q21).
The tone Call Guard squelch circuit detects AF
signals and opens the squelch only when receiving a
signal containing a matching subaudible tone or code
(CTCSS or DTCS). When tone squelch is in use and a
signal with a mismatched or no subaudible tone is
received, the tone squelch circuit mutes the AF signals
even when noise squelch is open.
5.6.3 TRANSMIT DRIVER CIRCUIT
A portion of the audio signal from amplifier IC7b
passes through low-pass filter Q5 in the front unit to
remove voice signals. It is then applied to CPU IC1 on
pin 97 via the “CTCIN” line. The CPU detects the
CTCSS or DTCS signaling and controls the AF mute
switch via I/O I/O expander IC13.
The transmit driver circuit amplifies the VCO
oscillating signal to the level required by the power
amplifier module. The RF signal from buffer amplifier
Q30 passes through the T/R switch D18 and is amplified by the buffer amplifiers Q21, Q20, and driver
Q19. The signal is then applied to the power amplifier
module IC5.
5.6.4 POWER AMPLIFIER MODULE
5.6 UHF TRANSMITTER CIRCUIT
The power amplifier module amplifies the driver
signal to the output power level. The RF signal from
the driver Q19 is applied to the power module which
produces 35 watts of output power at the antenna jack.
5.6.1 MICROPHONE AMPLIFIER CIRCUIT
The microphone amplifier circuit amplifies the
microphone audio signal to the level required by the
modulation circuit and also provides pre-emphasis.
The amplified signal is fed through antenna
switching circuit D3, a low-pass filter and APC detector, and is then applied to the antenna jack. The collector voltage of driver Q19 and the control voltage on
pin 2 of the power module IC5 come from APC transistors Q17 and Q18. Transmit switch Q16 turns off
Q17 and Q18 when the transmitter is disabled.
The microphone audio signal is amplified by
IC8b and limited by IC8a. Pre-emphasis is provided
by R152 and C180. The signal is then fed to splatter
filter IC7a and then to pin 11 of switching circuit
IC11.
5B-9
November 1998
Part No. 001-7600-001
UHF (7640) CIRCUIT DESCRIPTION
Figure 5-6 PLL Circuit (UHF)
5.6.5 APC CIRCUIT
5.7 UHF PLL CIRCUIT
The APC (Automatic Power Control) circuit protects the power amplifier from damage caused by a
mismatched antenna load, and provides a stable power
output.
5.7.1 PLL CIRCUIT
One diode in D1 detects forward signals and the
other detects reverse signals. The combined voltage is
at minimum level when a matched antenna load of 50
ohms is present and then increases as it becomes mismatched. The detected voltage is applied to pin 6 of
inverse amplifier IC4b. Power setting voltage T4 is
applied to the other input (pin 5) as a reference.
When antenna impedance is mismatched, the
detected voltage exceeds the power setting voltage.
The output voltage on pin 7 then decreases which
turns Q17 off slightly. Transistor Q18 then turns off
slightly and lowers the voltage applied to the collector of Q19 and the power control input of IC5. This
reduces the output power produced by these devices.
November 1998
Part No. 001-7600-001
The PLL (Phase-Locked-Loop) circuit provides a
stable (± 2.5 PPM) receive first injection and transmit
frequency. The PLL circuit consists of PLL circuit
IC2, a loop filter, and reference oscillator. A block
diagram of the PLL circuit is shown in Figure 5-6.
The signal from VCOs (Voltage-Controlled
Oscillator) Q23 and Q25 is buffered by Q28 and Q29
and then applied to pin 2 of IC10. The prescaler in
IC10 divides the VCO signal down so that it is within
the frequency range of the programmable counter.
A reference frequency generated by reference
oscillator X2 is applied to pin 15 of IC1. This signal is
divided down by a programmable divider and provides the reference input to the phase detector. When
the VCO is oscillating at the correct frequency, the
VCO-derived input to the phase detector is the same
frequency as the reference input.
5B-10
UHF (7640) CIRCUIT DESCRIPTION
The phase detector determines the phase difference between these signals and then produces output
pulses on pin 8 which are filtered by the loop filter.
This filter consists of Q34, R180, R181, and C202C204. The output of this filter is the DC control voltage applied to the VCO. The phase detector increases
or decreases this control voltage to change the VCO
frequency.
5.7.4 UHF CPU IC1 PORT ALLOCATION
Pin
No.
1
12
5.7.2 VCO CIRCUIT
13
Separate receive and transmit VCOs are used.
The receive VCO consists of Q23/D20/D34 and the
transmit VCO consists of Q25/D22/D33. The signal
from these VCOs is amplified by buffer amplifiers
Q28 and Q29 and is then applied to T/R switch D18
and D19. The VCO receive injection signal is applied
to first mixer Q3, and the VCO transmit signal is
applied to driver Q21. Part of the Q28 output signal is
amplified by Q29 and fed back to PLL IC10, pin 2 as
described in the preceding section.
14
16
17
18
19
26
32
5.7.3 UHF POWER SUPPLY
Line
Description
36
VCC
HV
Unswitched input voltage to the transceiver.
VCC supply voltage switched by Q14 and Q15.
When the [POWER] switch is pressed, the CPU
outputs the “PWON” control signal to this circuit
to turn the HV supply on.
CPU5V Common 5V supply for the CPU produced from
the VCC supply by CPU5V regulator IC3. The
circuit outputs this voltage regardless of the
transceiver on-off condition.
8V
Common 8V supply produced from the HV
supply by 8V regulator IC2.
5V
Common 5V supply produced from the HV
supply by 5V regulator Q12/Q13.
R8
Receive 8V supply produced by R8 regulator
Q10/Q11 using the “TXC” signal from I/O
expander IC13.
T8
Transmit 8V supply controlled by T8 regulator
Q8/Q9 using the “TMUT” signal from I/O
expander IC13.
37
38
39
40
41
42
43
45,
46
4750
5B-11
Port
Name
Description
VIN
Input port for overvoltage detection from
the vehicle power source.
SCK
Outputs clock signal to EEPROM IC3,
PLL IC10 (main unit) and expanders
IC12, IC13 (main unit), etc.
SI
Input port for the data signal from
EEPROM IC3, etc.
SO
Outputs data signal to EEPROM IC3, PLL
IC10 (main unit) and expanders IC12,
IC13 (main unit).
CLIN
Input port for cloning signal.
CLOUT Output port for cloning signal.
POSW Input for the POWER switch. Low =
POWER switch pushed.
NOIS
NOIS signal input port from the FM IF
IC1 (main unit) for noise squelch
operation.
PTT
Input port for the PTT switch. Low = PTT
switch pushed.
RFATT Outputs RF attenuator control signal to the
attenuator switch (Q1 on main unit).
Low = Attenuator function on.
UNLK Input port for PLL unlock signal from the
PLL IC10 (main unit). High = unlock.
PWON Outputs control signal for the power
switching circuit (Q14/Q15 on main unit).
DIM
Outputs control signal for LCD backlight.
Low = LCD backlight on.
EXTPTT Input port for the PTT switch from external connector J5 (main unit). Low =
External PTT switch on.
DIM
Input port for the LCD backlight control
signal from external connector J5 (main
unit). Low = External dimmer switch on.
PLST
Outputs strobe signals for PLL IC10 (main
unit).
DAST
Outputs strobe signals for level controller
IC12 (main unit).
EXST
Outputs strobe signals for the I/O
expander IC13 (main unit).
KS1,
Output ports for the key matrix.
KS2
KR3Input ports for the key matrix
KR10
November 1998
Part No. 001-7600-001
UHF (7640) CIRCUIT DESCRIPTION
Pin
No.
51
5254
55
90
91
9496
97
98
99
100
Port
Name
5.7.6 UHF PORT EXPANDER IC13 (MAIN UNIT)
Description
Outputs control signal for beep mute circuit Q10. High = Beep muted.
CTDA0- Output port for CTCSS/DTCS signals.
CTDA2
HANG Input port for the microphone hanger
detection signal. Low = Microphone on
hook.
MTONE Output port for beep audio while receiving
and 2/5 tone signals while transmitting.
TONED Outputs DTMF signals.
OPV3- Input port for option connector J4 state
OPV1
(main unit).
CTCIN Input port for the CTCSS/DTCS IN
decode signals.
SD
Input port for S-meter signal.
LVIN
Input port for PLL lock voltage.
TEMP Input port for the transceiver’s internal
temperature.
Pin
No.
BM
4
TXC
5
TMUT
6
RM
7
MM
11
HORNO
12
AFON
13
AFHPF
14
NWC
5.7.5 UHF I/O EXPANDER IC12 (MAIN UNIT)
Pin
No.
Port
Name
2, 3, T1-T3
10
11
T4
14
REF
Description
Output tunable bandpass filter control
signals.
Output port for tunable bandpass filter
control signal while receiving and power
control signal while transmitting.
Output port for reference frequency
control voltage.
November 1998
Part No. 001-7600-001
Port
Name
5B-12
Description
Outputs control signal for R8 regulator
Q10/Q11 (main unit). High = Transmit
mode.
Outputs control signal for T8 regulator
Q8/Q9 (main unit). High = Transmitter
off.
Outputs AF mute switch IC11(main unit)
control signal for the receiver circuit. High
= No receive audio is emitted.
Outputs MIC mute control signal. High =
DTMF signals are output, etc.
Outputs external device control signal.
High = Matched 2/5-tone signals are
received.
Outputs control signal for the AF amplifier
regulator circuit. High = Squelch is open,
etc.
Outputs AF filter control signal. High =
Filter out CTCSS or DTCS frequency.
Outputs receive/transmit passband width
control signal. High = Narrow bandwidth
is selected.
ADJUSTMENT PROCEDURE
SECTION 6 ADJUSTMENT PROCEDURE
50 Ohm, 50W
Load
Wattmeter
Frequency
Monitor
13.6 Volt, 17A
Power Supply
Programming Cable
Part No. 585-7500-031
4.0 Ohm Speaker Load
Test Cable (Fabricated)
Figure 6-1 Test Setup
6.1 GENERAL
Equipment
FM deviation
meter
Audio generator
6.1.1 SUGGESTED TEST EQUIPMENT
The equipment that should be used to adjust this
transceiver is listed in the following table.
Equipment
DC power supply Output voltage
Current capacity
RF power meter Measuring range
Freq range
Impedance
SWR
Frequency counter Freq range
Freq accuracy
Sensitivity
Standard Signal
Generator (SSG)
Freq range
Measuring range
Freq range
Output level
Power atten.
Capacity
Freq range
Output level
DC voltmeter
Input impedance
Attenuator
Grade and Range
13.6 VDC
15A
1-50 W
146-512 MHz
50 ohms
Less than 1.2:1
0.1-500 MHz
±1 ppm or better
100 mV or better
Grade and Range
Oscilloscope
Freq range
Measuring range
AC millivoltmeter Measuring range
External Speaker Input Impedance
Power Capacity
6-1
DC-520 MHz
0 to ±10 kHz
67-3000 Hz
1-500 mV
50 or 60 dB
50W
146-520 MHz
0.1 µV-32 mV
(–127 to –17 dBm)
50kΩ/V DC or
better
DC-20 MHz
0.01-20V
10 mV - 10V
4Ω
5 watts min.
November 1998
Part No. 001-7600-001
ADJUSTMENT PROCEDURE
Supply Voltage
Internal Temp
PLL Lock Voltage
RSSI
DTCS Bal Level
Squelch Level
Selected Channel Info
IC5/IC12 D/A Outputs
RF Power Output
FM Deviation
DTCS Balance
Reference Frequency
Adjusts Current Vol Level
Rx Bandpass Filter
Squelch Level
NOTE: The above values for the various settings are examples only. Because of component
tolerances, the optimum setting for each transceiver will probably be different.
Figure 6-2 Screen Display Example
Programming Cable
Pin 2 (Clone)
Pin 4 (PTT)
Pin 8
Pin 1
PTT
Sw
To Transceiver
Mic In
To Computer
Pin 7 (Ground)
Pin 5 (MICE “+”)
Pin 6 (MIC “–”)
Figure 6-3 Test Cable Schematic
6.1.2 TEST CHANNELS
software described in Section 4. There are no fixed test
channels or test modes selectable with this transceiver.
NOTE: Before programming the test channels, download the current programming data in the transceiver
and save it to a disk file so that it can be reloaded after
the adjustments are complete.
6.1.3 TEST CABLE
The test cable shown Figure 6-3 in must be fabricated to perform transceiver alignment. This cable is
used in place of the adapter cable shown in Figure 4-1.
It is required because in addition to connecting the
computer to the microphone jack, a transmit audio and
keying (PTT) signal must be applied to that jack. If
desired, Replication Cable, Part No. 597-2002-200,
can be modified to provide the 8-pin modular-style
connector required for this test cable.
Test channels at the low, middle (VHF only), and
high ends of the operating band, and High, Low1, and
Low2 RF output power are required to perform the
adjustments in this section. These test channels are
listed in Tables 6-1 and 6-2, and they must be programmed as regular channels using the programming
November 1998
Part No. 001-7600-001
6-2
ADJUSTMENT PROCEDURE
Table 6-1 VHF Test Frequencies
Tx/Rx Freq
Call Guard
Power
Bandwidth [1]
(MHz)
Squelch
1
174.050
Low1
None
Narrow or wide
2
146.050
Low1
None
Narrow or wide
3
160.050
High
None
Narrow or wide
4
160.050
Low2
None
Narrow or wide
5
160.050
Low1
None
Narrow or wide
6
160.050
Low1
007N DTCS
Narrow or wide
7 [1]
160.050
Low1
None
Alternate
8 [1]
160.050
Low1
007 DTCS
Alternate
[1] If the transceiver operates on only narrow or wide band channels, program only channels 1-6, and program them for the type of channels used (narrow or wide band). If the
transceiver operates on both wide and narrow band channels, program additional
channels 7 and 8 for the other type of operation.
Test Channel
Table 6-2 UHF Test Frequencies
Model (see Section 1.4)
Call Guard
Power
Bandwidth [1]
Squelch
400-430 MHz 450-470 MHz 470-490 MHz 488-512 MHz
1
400.050
450.050
470.050
490.050
Low1
None
Narrow or wide
2
430.050
470.050
490.050
512.050
Low1
None
Narrow or wide
3
400.050
450.050
470.050
490.050
High
None
Narrow or wide
4
400.050
450.050
470.050
490.050
Low2
None
Narrow or wide
5
400.050
450.050
470.050
490.050
Low1
007N DTCS Narrow or wide
6 [1]
400.050
450.050
470.050
490.050
Low1
None
Alternate
7 [1]
400.050
450.050
470.050
490.050
Low1
007N DTCS Alternate
[1] If the transceiver operates on only narrow or wide band channels, program only channels 1-5, and program them for
the type of channels used (narrow or wide band). If the transceiver operates on both wide and narrow band channels,
program additional channels 6 and 7 for the other type of operation.
Test Channel
6.1.4 COMPUTER-AIDED TUNING
3. Start the computer in the DOS mode. Make the current directory the ADJ subdirectory and start the
program by typing the following:
To make most adjustments described in the following information, the computer setup used for programming (see Section 4) and special Adjust software
are required. The Adjust software is included on the
disk with the programming software in a separate subdirectory called ADJ. To set up the transceiver for use
with this equipment, proceed as follows:
ADJUST /X /Y
X = A - VHF (normal crystal), B - UHF (TCXO)
Y = 1 - Serial port 1, 2 - Serial port 2
1. Copy the Adjust software to the hard disk or a programming disk as described in Section 4.1.3
For example, if tuning a VHF transceiver and the
programming cable is connected to serial port 2 of the
computer, type ADJUST /A /2 (ENTER).
2. Turn transceiver power on and connect the computer to the transceiver microphone jack using the
programming cable and fabricated test cable
described in the preceding section (see Figure 6-1).
4. The tune data in the connected transceiver is then
downloaded and the adjustment screen shown in
Figure 6-2 is displayed. The information displayed
6-3
November 1998
Part No. 001-7600-001
ADJUSTMENT PROCEDURE
VHF ADJUSTMENTS
2. Select the MODEL menu and press the down arrow
( ↓ ) key. Type “RESERVE” and press (ENTER).
The “Reserved” indicator should begin flashing in
the upper right corner of the screen.
in the upper part of the screen is for the currently
selected channel.
5. To move the cursor between the parameters on the
left side of the bar graph, press the ↑ ↓ arrow keys.
To change a parameter, press the ← →, PgUp/PgDn,
backspace, or spacebar keys. Refer to the individual
adjustment descriptions for more information on the
functions performed using this screen.
3. Connect the computer to the transceiver that had the
EEPROM replaced or is displaying the error (see
Figure 4-1). Write the current data to that
transceiver.
6.1.5 REPROGRAMMING IF EEPROM IS REPLACED OR ERROR OCCURS
6.2 PRELIMINARY SETUP
When EEPROM IC3 is replaced or if the transceiver displays an error message and beeps, the following operation must be performed before making
any adjustments.
1. Preprogram the transceiver with test channels as
described in Section 6.1.2.
2. Connect the computer test setup using the test cable
described in Sections 6.1.3 and 6.1.4. Start the
program as described.
1. Using the programming software, read (download)
the data programmed in an exact same version of
the transceiver. Refer to Section 4.4.4 for more
information on reading data.
3. Connect a DC power supply and a 50-ohm, 50-watt
antenna load to the transceiver (see Section 6.1.1).
VHF ADJUSTMENTS
6.3 PLL ADJUSTMENT (VHF MODELS)
5. Select the channel on the low end of the band (Test
Ch. 2 - 146.050 MHz). The meter reading should be
0.9 – 1.9 volt in both the transmit and receive
modes. Replace the bottom cover.
1. Remove the bottom cover by removing four screws.
Connect a DC voltmeter to check point CP1 shown
in Figure 6-4.
6.4 TRANSMITTER ADJUSTMENTS (VHF
MODELS)
2. Select the channel on the high end of the band
(Test Ch. 1 - 174.050 MHz). This is done by pressing the ↑ ↓ arrow keys to highlight “Memory CH”
and then pressing the adjust keys (←/→, PgUp/
PgDn, or spacebar/backspace) to select the channel.
6.4.1 REFERENCE FREQUENCY
1. Select the channel on the high end of the band (Test
Ch. 1 - 174.050 MHz).
3. Key the transmitter using the switch on the test
cable and the meter reading should be 4.3 volts. If
this voltage is significantly different, adjust L14 (it
may be necessary to remove the VCO shield).
2. Scroll down to “TXF SET” on the screen and press
(Enter). Monitor the transmit signal with a frequency counter and key the transmitter using the
test cable switch.
4. Unkey the transmitter and the meter reading in the
receive mode should be 3.3 – 4.3 volts.
November 1998
Part No. 001-7600-001
3. Adjust for the displayed frequency by pressing the
computer adjust keys. Unkey the transmitter.
6-4
ADJUSTMENT PROCEDURE
VHF ADJUSTMENTS (CONT’D)
L14
PLL lock voltage
adjustment
CP1
PLL lock voltage
check point
Figure 6-4 VHF Adjustment Points
4. Press (Enter) again to select the second adjust channel. Key the transmitter and adjust for the displayed
frequency. Unkey the transmitter and press (Enter)
again to exit this function.
puter adjust keys to set the following power. Unkey
the transmitter. Repeat for the Low2 (Test Ch. 4)
and Low1 (Test Ch. 5) power levels.
High Power = 45 watts (Test Ch. 3)
Low2 Power = 25 watts (Test Ch. 4)
Low1 Power = 4.5 watts (Test Ch. 5)
6.4.2 OUTPUT POWER ADJUST
6.4.3 FM DEVIATION ADJUST
1. Select the high power channel in the middle of the
band (Test Ch. 3 - 160.050 MHz). Connect a power
meter to the antenna jack.
1. Connect an audio generator to the microphone
audio input of the test cable (pin 5 shown in Figure
6-3). Set the generator output for 1 kHz at 40 mV
rms.
2. Scroll to “Power (Hi)” on the screen and key the
transmitter using the test cable switch. Use the com-
6-5
November 1998
Part No. 001-7600-001
ADJUSTMENT PROCEDURE
VHF ADJUSTMENTS (CONT’D)
2. Connect an RF signal generator to the antenna jack.
Set the output for the channel frequency at a level of
3.2 µV (–97 dBm), modulated with 1 kHz at the
following deviation:
2. Select the low power channel in the middle of the
band (Test Ch. 5 - 160.050 MHz). On the computer
screen, scroll to “MOD N” if setting narrow band
deviation or “MOD W” if setting wideband
deviation.
Wideband (30 kHz) Models - 3.5 kHz
Narrowband (12.5 kHz) Models - 1.75 kHz
3. Monitor the transmit deviation with a communications monitor set as follows: HPF = Off, LPF = 20
kHz, De-Emphasis = Off, Detector = (P–P)/2.
3. Adjust the filters automatically or manually as
follows:
4. Key the transmitter using the test cable switch and
set the following maximum deviation by pressing
the adjust keys (←/→, PgUp/PgDn, or spacebar/
backspace). Unkey the transmitter.
Automatic Adjustment Method 1
(Adjusts all filters)
a. Select “BPF T1” on the screen and adjust for “0”.
Repeat for T2 – T4. Reselect “BPF T1”.
Wideband (30 kHz) Models - 4.2 kHz
Narrow Band (12.5 kHz) Models - 2.1 kHz
b. Press the F9 key and all filters are automatically
adjusted for peak levels.
5. If the transceiver operates on both narrow and wide
band channels, select Test Ch. 7 and also adjust the
deviation on that channel (see note in Table 6-1).
Automatic Adjustment Method 2
(Adjusts only one filter at a time)
6.4.4 DTCS WAVEFORM ADJUST
a. Select “BPF T1” and press F8 to automatically
adjust it for a peak level.
1. Select a channel in the middle of the band programmed for DTCS (Test Ch. 8 - 160.050 MHz). On
the computer screen, scroll to “DTCS N” if setting
a narrow band channel or “DTCS W” if setting a
wideband channel.
b. Repeat for the other three filters.
Manual Adjustment
2. Key the transmitter and view the demodulated signal on the CRT of a communications monitor.
a. Connect a SINAD meter with a 4-ohm load to the
external speaker jack (see Figure 6-4).
3. Press the adjust keys on the computer so that the
waveform appears as follows:
b. Select “BPF T1” and press the adjust keys (←/→,
PgUp/PgDn, or spacebar/backspace) to obtain
minimum distortion.
Set For
Flat
Waveform
c. Repeat for the other three filters.
6.5.2 SQUELCH ADJUST
4. If the transceiver operates on both narrow and wide
band channels, select Test Ch. 8 and also set the
waveform on that channel (see note in Table 6-1).
NOTE: The squelch level can also be set from the
front panel as described in Section 3.3.6.
6.5 RECEIVER ADJUSTMENTS (VHF MODELS)
6.5.1 BANDPASS FILTER ADJUST
1. Select the channel on the low end of the operating
band (Test Ch. 2 - 146.050 MHz).
1. Select the channel on the low end of the band (Test
Ch. 2 - 146.050 MHz).
2. Connect a SINAD meter with a 4-ohm load to the
external speaker jack.
November 1998
Part No. 001-7600-001
6-6
ADJUSTMENT PROCEDURE
VHF ADJUSTMENTS (CONT’D)
6.5.3 BEEP TONE LEVEL
3. Connect an RF signal generator to the antenna jack.
Set it to the channel frequency with an output modulated with 1 kHz at the following deviation:
This adjustment sets the volume of the beep tone
that is heard when keys are pressed and at other times
(if it is enabled). The computer setup used in the preceding steps is not required for this adjustment.
Proceed as follows:
Wideband (30 kHz) Models - 3.5 kHz
Narrowband (12.5 kHz) Models - 1.75 kHz
4. Scroll to “SQL” on the computer screen and press
the adjust keys to lower the displayed number so
that the receiver unsquelches (the 1 kHz tone is
heard). Also adjust the volume if necessary.
1. Unplug any cable that may be plugged into the
microphone jack and locate R60 inside this jack.
(see Figure 6-5).
5. Adjust the signal generator output to obtain 8 dB
SINAD.
2. Repeatedly press a front panel switch to enable the
beep tone and adjust R60 for the desired level.
6. Press the computer adjust keys to increase the displayed number to the point where the receiver
squelches. Then slowly adjust the number downward again until the receiver just unsquelches.
R60
Beep Tone
Level Adj
Figure 6-5 Beep Tone Level Adjustment
6-7
November 1998
Part No. 001-7600-001
ADJUSTMENT PROCEDURE
UHF ADJUSTMENTS
frequency. Unkey the transmitter and press (Enter)
again to exit this function.
NOTE: Perform the preliminary setup described in
Section 6.2 before proceeding with these adjustments.
6.6 PLL ADJUSTMENT (UHF MODELS)
6.7.2 OUTPUT POWER ADJUST
1. Remove the bottom cover by removing four screws.
Connect a DC voltmeter to check point CP1 shown
in Figure 6-6.
1. Select the high power channel at the low end of the
band (Test Ch. 3). Connect a power meter to the
antenna jack.
2. Select the channel at the low end of the band
(Test Ch. 1). This is done by pressing the ↑ ↓ arrow
keys to highlight “Memory CH” and then pressing
the adjust keys (←/→, PgUp/PgDn, or spacebar/
backspace) to select the channel.
2. Scroll to “Power (Hi)” on the screen and key the
transmitter using the test cable switch. Use the computer adjust keys to set the following power. Unkey
the transmitter. Repeat for the Low2 (Test Ch. 4)
and Low1 (Test Ch. 5) power levels.
High Power = 35 watts
Low2 Power = 20 watts
Low1 Power = 3.5 watts
3. In the receive mode, the meter reading should be 1.5
volts. If this voltage is significantly different, adjust
L23 (it may be necessary to remove the shield).
6.7.3 FM DEVIATION ADJUST
4. Key the transmitter using the switch on the test
cable and the meter reading also should be 1.5 volts.
If this voltage is significantly different, adjust L26.
1. Connect an audio generator to the microphone
audio input of the test cable (pin 5 shown in Figure
6-3). Set the generator output for 1 kHz at 40 mV
rms.
5. Unkey the transmitter and select the channel on the
high end of the band (Test Ch. 2). The meter reading
in the receive and transmit modes should be 3.5 –
5.5 volts. Replace the bottom cover.
2. Select the low power channel at the low end of the
band (Test Ch. 1). On the computer screen, scroll to
“MOD N” if setting narrow band deviation or
“MOD W” if setting wideband deviation.
6.7 TRANSMITTER ADJUSTMENTS (UHF
MODELS)
3. Monitor the transmit deviation with a communications monitor set as follows: HPF = Off, LPF = 20
kHz, De-Emphasis = Off, Detector = (P–P)/2.
6.7.1 REFERENCE FREQUENCY
1. Select the low power channel on the high end of the
band (Test Ch. 2).
4. Key the transmitter using the test cable switch and
set the following maximum deviation by pressing
the adjust keys (←/→, PgUp/PgDn, or spacebar/
backspace). Unkey the transmitter.
2. Scroll down to “TXF SET” on the screen and press
(Enter). Monitor the transmit signal with a frequency counter and key the transmitter using the
test cable switch.
Wideband (30 kHz) Models - 4.2 kHz
Narrow Band (12.5 kHz) Models - 2.1 kHz
3. Adjust for the displayed frequency by pressing the
computer adjust keys. Unkey the transmitter.
5. If the transceiver operates on both narrow and wide
band channels, select Test Ch. 6 and also adjust the
deviation on that channel (see note in Table 6-2).
4. Press (Enter) again to select the second adjust channel. Key the transmitter and adjust for the displayed
November 1998
Part No. 001-7600-001
6-8
ADJUSTMENT PROCEDURE
UHF ADJUSTMENTS (CONT’D)
CP1
PLL lock voltage
check point
L23
PLL lock voltage
adjustment
L26
PLL lock voltage
adjustment
Figure 6-6 UHF Adjustment Points
4. Press the adjust keys on the computer so that the
waveform appears as follows:
6.7.4 DTCS WAVEFORM ADJUST
1. Select the channel on the low end of the programmed for DTCS code 007N (Test Ch. 5).
Set For
Flat
Waveform
2. On the computer screen, scroll to “DTCS N” if setting a narrow band channel or “DTCS W” if setting
a wideband channel.
5. If the transceiver operates on both narrow and wide
band channels, select Test Ch. 7 and also set the
waveform on that channel (see note in Table 6-2).
3. Key the transmitter and view the demodulated signal on the CRT of a communications monitor.
6-9
November 1998
Part No. 001-7600-001
ADJUSTMENT PROCEDURE
UHF ADJUSTMENTS (CONT’D)
6.8 RECEIVER ADJUSTMENTS (UHF MODELS)
6.8.2 SQUELCH ADJUST
6.8.1 BANDPASS FILTER ADJUST
NOTE: The squelch level can also be set from the
front panel as described in Section 3.3.6.
1. Select the channel on the low end of the band (Test
Ch. 1).
1. Select the channel on the low end of the operating
band (Test Ch. 2). channel with LB models and the
150.050 MHz channel with HB models.
2. Connect an RF signal generator to the antenna jack.
Set the output for the channel frequency at a level of
3.2 µV (–97 dBm), modulated with 1 kHz at the
following deviation:
2. Connect a SINAD meter with a 4-ohm load to the
external speaker jack.
3. Connect an RF signal generator to the antenna jack.
Set it to the channel frequency with an output modulated with 1 kHz at the following deviation:
Wideband (25 kHz) Models - 3.5 kHz
Narrowband (12.5 kHz) Models - 1.75 kHz
Wideband (30 kHz) Models - 3.5 kHz
Narrowband (12.5 kHz) Models - 1.75 kHz
3. Adjust the filters automatically or manually as
follows:
4. Scroll to “SQL” on the computer screen and press
the adjust keys to lower the displayed number so
that the receiver unsquelches (the 1 kHz tone is
heard). Also adjust the volume if necessary.
Automatic Adjustment Method 1
(Adjusts all filters)
a. Select “BPF T1” on the screen and adjust for “0”.
Repeat for T2 – T4. Reselect “BPF T1”.
5. Adjust the signal generator output to obtain 8 dB
SINAD.
b. Press the F9 key and all filters are automatically
adjusted for peak levels.
6. Press the computer adjust keys to increase the displayed number to the point where the receiver
squelches. Then slowly adjust the number downward again until the receiver just unsquelches.
Automatic Adjustment Method 2
(Adjusts only one filter at a time)
a. Select “BPF T1” and press F8 to automatically
adjust it for a peak level.
6.8.3 BEEP TONE LEVEL
b. Repeat for the other three filters.
This adjustment sets the volume of the beep tone
that is heard when keys are pressed and at other times
(if it is enabled). The computer setup used in the preceding steps is not required for this adjustment. Proceed as follows:
Manual Adjustment
a. Connect a SINAD meter with a 4-ohm load to the
external speaker jack (see Figure 6-6).
1. Unplug any cable that may be plugged into the
microphone jack and locate R60 inside this jack.
(see Figure 6-5).
b. Select “BPF T1” and press the adjust keys (←/→,
PgUp/PgDn, or spacebar/backspace) to obtain
minimum distortion.
2. Repeatedly press a front panel switch to enable the
beep tone and adjust R60 for the desired level.
c. Repeat for the other three filters.
November 1998
Part No. 001-7600-001
6-10
PARTS LIST
SECTION 7 PARTS LIST
7610 (VHF) Main Unit
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&íëæ
&íëå
&íëä
&íêí
&íêì
&íêë
&íêê
&íêè
&íêç
&íêæ
&íêå
&íêä
&íéí
&íéì
&íéë
&íéê
&íéé
&íéè
&íéç
&HUDPý*50éëðçý&.ýíëí&ýèíí37 íëëðêäíçðæäè
&HUDPý*50éëðçý&+ýìåí-ýèíí37 íëëðêäíçðæää
&HUDPý&ìçíåý&+ýì+ýéæì-ð7ð$
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&HUDPLFý*50éíý&.ýí5è&ýèí37 íëëðêäíçðåìê
&HUDPLFý&ìçíåý&+ýì+ýéæì-ð7ð$ íëëðêäíçðëèë
&HUDPý*50éëðçý&+ýíåí'ýèíí37 íëëðêäíçðåìä
&HUDPý*50éëðçý&+ýìëí-ýèíí37 íëëðêäíçðæäç
&HUDPý*50éëðçý&+ýìèí-ýèíí37 íëëðêäíçðæäæ
&HUDPý*50éëðçý&+ýìåí-ýèíí37 íëëðêäíçðæää
&HUDý*50éëðçý:è5ýìíë.ýèíí37 íëëðêäíçðåíí
&HUDPLFý&ìçíåý&+ýì+ýéæì-ð7ð$ íëëðêäíçðëèë
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýéæì-ð7ð$ íëëðêäíçðëèë
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPý*50éëðçý&+ýìåí-ýèíí37 íëëðêäíçðæää
&HUDPý*50éëðçý&+ýìåí-ýèíí37 íëëðêäíçðæää
&HUDPLFý&ìçíåý&+ýì+ýìëí-ð7ð$ íëëðêäíçðíçç
&HUDPLFý&ìçíåý&+ýì+ýëæí-ð7ð$ íëëðêäíçðíçä
&HUDPLFý&ìçíåý&+ýì+ýìëí-ð7ð$ íëëðêäíçðíçç
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýéæì-ð7ð$ íëëðêäíçðëèë
&HUDPLFý&ìçíåý&+ýì+ýìåí-ð7ð$ý íëëðêäíçðíçå
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýéæì-ð7ð$ íëëðêäíçðëèë
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýíåí'ð7ð$ý íëëðêäíçðèäæ
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýìíí'ð7ð$ íëëðêäíçðèäå
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýìåí-ð7ð$ íëëðêäíçðíçå
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýìëí-ð7ð$ íëëðêäíçðíçç
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýíèí%ð7ð$ íëëðêäíçðçìí
&HUDPLFý&ìçíåý&+ýì+ýëëí-ð7ð$ íëëðêäíçðíçè
7-1
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&HUDPLFý&ìçíåý&+ýì+ýí5è%ð7ð$ íëëðêäíçðíåé
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýíëí%ð7ð$ íëëðêäíçðíåç
&HUDPLFý&ìçíåý&+ýì+ýì5è%ð7ð$ íëëðêäíçðíåæ
&HUDPLFý&ìçíåý8-ýì+ýèçí-ð7ð$ý íëëðêäíçðåìé
&HUDPLFý&ìçíåý8-ýì+ýêêí-ð7ð$ íëëðêäíçðåìç
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì&ýìíé.7ð1 íëëðêäíçðçìé
7DQWDOXPý(&67ì$<ëëè5
íëëðêäíçðçëç
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7DQWDOXPý(&67í-<ìíç5
íëëðêäíçðçëæ
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí
&HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí
&HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýíäí'ð7ð$ý íëëðêäíçðêéå
&HUDPLFý&ìçíåý&+ýì+ýíäí'ð7ð$ íëëðêäíçðêéå
&HUDPLFý&ìçíåý&+ýì+ýèçí-ð7ð$ íëëðêäíçðçíì
&HUDPLFý&ìçíåý&+ýì+ýìëí-ð7ð$ íëëðêäíçðíçç
&HUDPLFý&ìçíåý&+ýì+ýêêí-ð7ð$ íëëðêäíçðíæí
7DQWDOXPý(&67ì$<ëëè5
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&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPý*50éëðçý&+ýìåí-ýèíí37 íëëðêäíçðæää
&HUDPý*50éëðçý&+ýëëí-ýèíí37 íëëðêäíçðåìå
&HUDPLFý&ìçíåý&+ýì+ýíæí'ð7ð$ íëëðêäíçðèäç
&HUDPLFý&ìçíåý&+ýì+ýíéí%ð7ð$ íëëðêäíçðçíä
&HUDPLFý&ìçíåý&+ýì+ýì5è%ð7ð$ý íëëðêäíçðíåæ
&HUDPLFý&ìçíåý&+ýì+ýìíì-ð7ð$ý íëëðêäíçðíæë
&HUDPLFý&ìçíåý&+ýì+ýíìí%ð7ð$ íëëðêäíçðíåè
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
November 1998
Part No. 001-7600-001
PARTS LIST
7510 (VHF) Main Unit
7610
5HIý1Rï
&íäç
&íäæ
&íäå
&íää
&ìíí
&ìíì
&ìíë
&ìíê
&ìíé
&ìíè
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&ìíæ
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&ììí
&ììì
&ììë
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&ìëí
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&ìëë
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&ìëé
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&ìëæ
&ìëå
&ìëä
&ìêí
&ìêì
&ìêë
&ìêê
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&ìêè
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&ìéë
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3DUWý1Rï
5HIý1Rï
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&ìçë
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&ìçè
&ìçç
&ìçæ
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&ìåé
&ìåè
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&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýìíì-ð7ð$ý íëëðêäíçðíæë
&HUDPLFý&ìçíåý&+ýì+ýíçí%ð7ð$ý íëëðêäíçðçìè
&HUDPLFý&ìçíåý&+ýì+ýì5è%ð7ð$ íëëðêäíçðíåæ
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýíéí%ð7ð$ý íëëðêäíçðçíä
&HUDPLFý&ìçíåý&+ýì+ýìíì-ð7ð$ý íëëðêäíçðíæë
&HUDPLFý&ìçíåý&+ýì+ýíìí%ð7ð$ íëëðêäíçðíåè
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýìíì-ð7ð$ý íëëðêäíçðíæë
&HUDPLFý&ìçíåý&+ýì+ýíåí'ð7ð$ý íëëðêäíçðèäæ
&HUDPLFý&ìçíåý&+ýì+ýíèí%ð7ð$ íëëðêäíçðçìí
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýìèí-ð7ð$ íëëðêäíçðíçæ
&HUDPLFý&ìçíåý&+ýì+ýèçí-ð7ð$ íëëðêäíçðçíì
&HUDPLFý&ìçíåý&+ýì+ýìèí-ð7ð$ íëëðêäíçðíçæ
&HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýçåí-ð7ð$ íëëðêäíçðæäå
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý&+ýì+ýììí-ð7ð$ íëëðêäíçðçìê
&HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê
&HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê
&HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê
&HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê
&HUDPLFý&ìçíåý&+ýì+ýìíì-ð7ð$ íëëðêäíçðíæë
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì&ýêêê.ð7ð$ íëëðêäíçðêèì
&HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí
&HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê
&HUDPLFý&ëíìëý-)ýì&ýìíè=ð7ð$ íëëðêäíçðíæå
&HUDPLFý&ìçíåý-%ýì&ýìíé.7ð1 íëëðêäíçðçìé
&HUDPLFý&ìçíåý&+ýì+ýëëì-ð7ð$ íëëðêäíçðçíê
&HUDPLFý&ìçíåý&+ýì+ýëëì-ð7ð$ íëëðêäíçðçíê
&HUDPLFý&ìçíåý&+ýì+ýìíí'ð7ð$ íëëðêäíçðèäå
&HUDPLFý&ìçíåý&+ýì+ýìåí-ð7ð$ íëëðêäíçðíçå
&HUDPLFý&ìçíåý&+ýì+ýíéí%ð7ð$ íëëðêäíçðçíä
&HUDPLFý&ìçíåý&+ýì+ýìëí-ð7ð$ íëëðêäíçðíçç
&HUDPLFý&ìçíåý&+ýì+ýìèí-ð7ð$ íëëðêäíçðíçæ
November 1998
Part No. 001-7600-001
7-2
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3DUWý1Rï
&HUDPLFý&ìçíåý&+ýì+ýìíí'ð7ð$
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&HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$
&HUDPLFý&ìçíåý-%ýì&ýìíé.7ð1
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&HUDPLFý&ëíìëý-%ýì$ýìíè0ð7ð$
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íëëðêäíçðèäå
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íëëðêäíçðçìé
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íëëðêäíçðíçí
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íëëðêäíçðçëç
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íëëðêäíçðíçê
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íëëðêäíçðíçí
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íëëðêäíçðíåí
íëëðêäíçðíçê
íëëðêäíçðíçê
íëëðêäíçðíçê
PARTS LIST
7610 (VHF) Main Unit
5HIý1Rï
&ìäë
&ìäé
&ìäç
&ìäæ
&ìäå
&ìää
&ëíí
&ëíì
&ëíë
&ëíê
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&ëíè
&ëíç
&ëíæ
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&ëìë
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&ëëí
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&ëëë
&ëëê
&ëëé
&ëëè
&ëëç
&ëëæ
&ëëå
&ëëä
&ëêí
&ëêì
&ëêë
&ëêê
&ëêé
&ëêè
&ëêç
&ëêæ
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&ëéí
&ëéì
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&HUDPLFý&ìçíåý-%ýì&ýìíé.7ð1
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&HUDPLFý&ìçíåý-%ýì&ýìíé.7ð1
&HUDPLFý&ìçíåý-%ýì$ýëëé.ð7ð1
7DQWDOXPý(&67í-<ìíç5
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7-6
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7610 (VHF) Main Unit
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Part No. 001-7600-001
PARTS LIST
7640 (UHF) Main Unit
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November 1998
Part No. 001-7600-001
&ìéì
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PARTS LIST
7640 (UHF) Main Unit
5HIý1Rï
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November 1998
Part No. 001-7600-001
PARTS LIST
7640 (UHF) Main Unit
5HIý1Rï
/íë
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3DUWý1Rï
/ëæ
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03íì
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/ìæ
/ìå
/ìä
/ëí
/ëì
/ëë
/ëê
/ëé
/ëè
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November 1998
Part No. 001-7600-001
5HIý1Rï
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íëëðêäíçðäæè
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7-14
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íëëðêäíçðäåë
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PARTS LIST
7640 (UHF) Main Unit
5HIý1Rï
'HVFULSWLRQ
3DUWý1Rï
4êæ
4êå
4êä
4éí
4éì
4éë
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7UDQVLVWRUý'7$ìéé(8ý7ìíæ
5ííì
5ííë
5ííê
5ííé
5ííè
5ííç
5ííæ
5ííå
5ííä
5íìí
5íìì
5íìë
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5íìé
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5íëì
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5íëå
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5íêì
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5íêê
5íêé
5íêè
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5HVý(5-ê*(<-ýì5íý9ýõìýýRKPô íëëðêäíçðçåå
5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê
5HVý0&5ìí(=+-ýéæýýRKPýõéæíô íëëðêäíìðæåì
5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê
5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê
5HVý0&5ìí(=+-ýéæýýRKPýõéæíô íëëðêäíìðæåì
5HVý0&5èí-=+-ýëëíýýRKPýõëëìô íëëðêäíçðääè
5HVý0&5èí-=+-ýëëíýýRKPýõëëìô íëëðêäíçðääè
5HVý(5-ê*(<-ýéæëý9ýõéïæýNýRKPô íëëðêäíçðìçí
5HVý(5-ê*(<-ýëëéý9ýõëëíýNýRKPô íëëðêäíçðìæå
5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê
5HVý(5-ê*(<-ýëëéý9ýõëëíýNýRKPô íëëðêäíçðìæå
5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê
5HVý(5-ê*(<-ýéæêý9ýõéæýNýRKPô íëëðêäíçðìæì
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5HVý(5-ê*(<-ýëëëý9ýõëïëýNýRKPô íëëðêäíçðìèæ
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5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê
5HVý(5-ê*(<-ýëëéý9ýõëëíýNýRKPô íëëðêäíçðìæå
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5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê
5HVý(5-ê*(<-ýêêìý9ýõêêíýýRKPô íëëðêäíçðêåä
5HVý(5-ê*(<-ýêêìý9ýõêêíýýRKPô íëëðêäíçðêåä
5HVý(5-ê*(<-ýìëéý9ýõìëíýNýRKPô íëëðêäíçðìæç
5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê
5HVý(5-ê*(<-ýìëëý9ýõìïëýNýRKPô íëëðêäíçðêäí
5HIý1Rï
5íêå
5íêä
5íéí
5íéì
5íéë
5íéé
5íéè
5íéç
5íéæ
5íéå
5íéä
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5HVý(5-ê*(<-ýêêéý9ýõêêíýNýRKPô íëëðêäíçðìåí
5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè
5HVý(5-ê*(<-ýéæíý9ýõéæýýRKPô íëëðêäíçðìéì
5HVý(5-ê*(<-ýìèëý9ýõìïèýNýRKPô íëëðêäíçðìèè
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5HVý0&5ìí(=+-ýéïæýNýRKPýõéæëô íëëðêäíçðäåå
5HVý0&5ìí(=+-ýéïæýNýRKPýõéæëô íëëðêäíçðäåå
5HVý0&5ìí(=+-ýéïæýNýRKPýõéæëô íëëðêäíçðäåå
5HVý0&5ìí(=+-ýéïæýNýRKPýõéæëô íëëðêäíçðäåå
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5HVý(5-ê*(<-ýçåêý9ýõçåýNýRKPô íëëðêäíçðìæê
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5HVý(5-ê*(<-ýìèìý9ýõìèíýýRKPô íëëðêäíçðìéè
5HVý0&5ìí(=+-ýëïëýýRKPýõë5ëô íëëðêäíçðåéæ
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5íæê
5HVý(5-ê*(<-ýëëëý9ýõëïëýNýRKPô íëëðêäíçðìèæ
November 1998
Part No. 001-7600-001
PARTS LIST
7640 (UHF) Main Unit
5HIý1Rï
5íæé
5íæè
5íæç
5íææ
5íæå
5íæä
5íåí
5íåì
5íåë
5íåê
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5ììë
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5HIý1Rï
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5ìêí
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5ìèí
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5HVý(5-ê*(<-ýìíèý9ýõìý0ýRKPô íëëðêäíçðìåé
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5HVý(5-ê*(<-ýìíèý9ýõìý0ýRKPô íëëðêäíçðìåé
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5HVý(5-ê*(<-ýìíèý9ýõìý0ýRKPô íëëðêäíçðìåé
November 1998
Part No. 001-7600-001
PARTS LIST
7640 (UHF) Main Unit
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November 1998
Part No. 001-7600-001
PARTS LIST
Front Unit (All Models)
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November 1998
Part No. 001-7600-001
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íëëðêäíçðæçë
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MP7 (C)
J1 (C)
MP1 (C)
MAIN UNIT (Bottom side)
MP5 (C)
MP6 (C)
MP3 (M)
MP7 (C)
J5 (M)
W3 (F)
MP7 (C)
J1 (F)
W7 (M)
MP7 (C)
MP12 (M)
MP1 (F)
FRONT UNIT
MP4 (M)
MP11 (C)
EP2 (F)
MP1 (M)
MP9 (C)
DS1 (F)
MP6 (C)
MP2 (F)
MP5 (M)
SP1 (C)
WS1 (C)
MP2 (M)
MP3 (C)
MP2 (C)
MP8 (C)
MP13 (C)
MP7 (C)
MP4 (C)
MP7 (C)
MP7 (C)
VHF (7610) EXPLODED VIEW
7-21
November 1998
Part No. 001-7600-001
UHF (7640) EXPLODED VIEW
← FOLDOUT (VHF Exploded View)
November 1998
Part No. 001-7600-001
7-22
SECTION 8 - SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS
COMMON LINE
LINE
RX LINE
TX LINE
DATA BUS LINE
MAIN UNIT
5V
5V
5V
1
5V
T1
2
5
DTCS
REF
OSC
NWC
T3
4
LOOP
FIL
PLL
IC
T4
REF BAL
REF
DISC
x3
R5
BAL
Q6
Q7.Q8
D7.D8
L14
SCK
SO
PLST
UNLK
6
BUFF
BUFF
VCO
C60.C61
IC2
A/D
7
5V
T5
x1 or x2
T2
3
AF
RIPPLE
FIL
Q10
TX/RX
SW
BUFF
BUFF
Q3
Q4
VCC
T5
Q2
DRIVE
AMP
Q1
FWD
PWR
AMP
IC1
VCC
APC
CTRL
L23.L24
Q5
BPF
1 S t LO
R5
R5
NOIS
SD
XTAL
BPF
IF
AMP
FI3.FI4
or FI5
L22
D20.D21
BPF
RF
DET
D1.D2
IC6C
Q17.18
L26.L27
CERAMIC
BPF
L1.L2.L3
BPF
2nd Lo
IC3
LPF
D3.D4
D13.D14
L17.L18
REV
BUFF
FM DET
ANT
SW
L5
D5.D6
5V
8
IC5
T5
LPF
L21
D18.D19
5V
R5
L20.D17
RF
AMP
BPF
T4
L19.D16
BPF
BPF
T2
T1
ATT
Q13
Q14
Q12
FI1 or FI2
T4
T3
Q35
RF ATT
NWC
J4
SP
MOD
5V
5V
AFO
IC4d
5V
5V
T5
5V
IC4a
IC7a
BUFF
AF OUT
DET
IC8
AMUT
T
O
N
E
IC7b
AFHPF
5V
E
X
T
O
N
E
D
T
C
S
LPF
IC7c
BUFF
IC4c
IC6b
IC6d
AF
AMP
IC10
EX.SP
AMUT
BEEP
LIMIT
AMP
HPF
AMP
J5
HV
5V
NWC
T5C
5V
AFON
HV
TMUT
J5
FAN
MIC
AMP
HORNO
IC7d
MICOUT
IC4b
MICIN
AFATT
EXP
MMUT
SO
SCK
EXST
EXEN
AFHPF
NWC
FRONT UNIT
CPU5
RESET
X1
OSC1
COM1-COM3
5V
DS2-DS11
DIM
CPU
Q3.D6
AF CH U/D.Etc
KEY X8
KR0-KR3
KS0.KS1
SW2-SW9
DTMF
MTONE
BM
HANG
CLOUT
CLIN
CTCIN
POSW
S1
CTDAO-CTDA2
POSW
MIC
Q4
MIC
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
5V
DET
Q5
DTCSIN
Q6
R33.R34.R35
5V
TONE
5V
HANGER
AMP
Q7
R60
BEEP
39 5V
37 AFO
35 SI
33 OPT3
31 OPT2
29 OPT1
27 OPV3
25 OPV2
23 OPV1
21 PTT
19 PTTIN
17 DET
15 PWON
13 EXPTT
11 DIMIN
9 SO
7 SCK
5 SO
3 LVIN
1 GND
to MAIN
5V
D/A
EXTONE
J2
8V
CPU5V
GND
OPINT
OPCS
BUSY
BEEPOUT
TONE
BEEP
DTCSIN
RFATT
NOIS
UNLK
EXEN
EXST
DAST
PLST
VIN
TEMP
MIC
LPF
CLONE
I/F
J2
OPV1
OPV2
OPV3
J1
8V
CLONE
AFO
PTT
R
M
BEEP
MUTE
BEEPOUT
IN
OPT3
OPT2
OPT1
SIGOUT
MOWN
BUSY
MICIN
MICOUT
NC
NC
PTTOUT
+5
REG
CPU5
D26
OPT3
OPT2
OPT1
OPV3
OPV2
OPV1
OPINT
OPCS
BUSY
SI
SO
SCK
PLST
DAST
EXST
EXEN
PWON
RFATT
NOIS
UNLK
PTTIN
EXPTT
DIMIN
SO
LVIN
TEMP
VIN
SEG1-SEG32
DIM
CTRL
RMUT
CTRL
M
M
D25
IC1
LCD
BACK
LIGHT
RMUT
D5,C17
ECS
SI
SO
SCK
RESET
DS1
IC3
OSC2
IC2.Q1
MMUT
CTRL
SHIFT
CTRL
EEPROM
CPU5
IC11
MMUT
CSHIFT
CPU5
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
16
17
18
19
20
21
X
22
23
24
25
26
X
27
28
29
30
SCK
SI
SO
OPINT
OPCS
REM
AFOUT
DET
RXMUT
BEEPOUT
AFONOP
MICMUTE
HV
5V
GND
+5
REG
T5
SW
T5
Q28
T5C
Q29.Q30
PWON
R5
SW
R5
Q27
R5C
HV
8V
REG
8V
HV
SW
PWON
PTTIN
OPT
J3
HV
DIMIN
J1
8V
CPU5V
GND
OPINT
OPCS
BUSY
BEEPOUT
TONE
BEEP
DTCS
RFATT
NOIS
UNLK
EXEN
EXST
DAST
PLST
VIN
TEMP
MIC
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
5V
AFO
SI
OPT3
OPT2
OPT1
OPV3
OPV2
OPV1
PTT
PTTIN
DET
PWON
EXPTT
DIMIN
SO
SCK
SD
LVIN
GND
HV
DIM
HORN
DIM
SW
Q32
HORNO
AFO
AFO
HORN
SW
Q33
DET
DET
IN
IN
SIG
SW
Q34
EXPTT
to FRONT
November 1998
Part No. 001-7600-001
Q26
Q36
Q10
8-1
VCC
W7
GND
IC9
5V
VHF (7610) BLOCK DIAGRAM
PTT
VHF (7610) Transistor Basing Diagrams
VHF (7610) Diode Basing Diagrams
November 1998
Part No. 001-7600-001
8-2
8-3
November 1998
Part No. 001-7600-001
VHF (7610) MAIN BOARD BOTTOM VIEW
FOLDOUT
→
VHF (7610) MAIN BOARD TOP VIEW
November 1998
Part No. 001-7600-001
8-4
T5
R5
5V
C16
470p
R228
18k
November 1998
Part No. 001-7600-001
R1
82k
C1
5p
C3
6p
C8
12p(PMR only)
C154
470p
C298
22(LMR,L-band only)
10(Others)
VDD
C168
0.1
C293
0.1
IC6a
NJM2902V
C162
0.01
R124
100k
C163
1
AFON
AFONOP
R126
10k
C165
0.01
R127
100k
R133
47k
RMUT
MOD
BEEP
a
MMUT
b
c
C169
0.01
C170
0.01
R211
2.2k
C173
0.001
R137
1M
REF
DTCS
BAL
NWC
2
3 +
11
5
4
5.0V
Q30
XP6501
R251
PTH9C32
LMR
(only)
Q40
2SC4081
W7
VCC
D32
RD20E
C223
47p
C222
470p
GND
D27
DSA3A1
I
VIN
C217
0.01
C216
100
Q31
DTC144EU
G
C220
470
R204
1k
R205
300k
IC9
S-81250PG-PD
R206
100k
R203
4.7k
3
C301
0.001
2
C219
0.001
1
C215
10
PWON
T5C
C212
0.001
C211
22
Q37
DTC144WU
R252 15K
R202
10k
6
C218
0.01
R199
4.7k
5.0V
(PMR)
R200
47k
R198
47k
Q28
2SA1588
O
C210
0.001
R195
10k
R194
10k
Q25
DTC114EU
R196
47k
C209
22
C206
470
C208
0.001
4
R197
1k
13.2V
5
3
C204
220
Q27
2SA1588
Q26
2SB1124
IC10
LA4425A
13.2V
Q29
2SB1201
C221
0.001
T5
R5
5V
CPU5
J4
AF OUT
TO SP
SP GND
IN
C228
0.001
C227
0.001
C226
0.001
C229
1
Q34
2SJ144
C235
0.001
C234
0.001
C233
0.001
C232
0.001
C230
0.22
D28
MA111
to
EXTERNAL
SPEAKER
J3
HV
DIM
HORN
GND
AFO
GND
DET
GND
IN
GND
PTT
R207
100k
HORNO
AFO
DET
EXPTT
SP1
J5
J6
HV
GND
Q33
DTC114EU
Q32
DTC114EU
DIMIN
NOTE: All 7610 Models are LMR (U.S.A.), H-Band (146-174 MHz).
P1
SP
SP GND
C231
0.001
for
OPTIONAL
UNIT
1
D33
DAN202U
J2
1 30
5V
HV
MICMUTE
AFONOP
BEEPOUT
RXMUTE
DET
AFOUT
REM
OPCS
OPINT
SO
SI
SCK
4
C166
2.2
Q20
DTC363EK
R123
6.8k
C161
0.1
Q39
DTC144EU
R121
300k
IC6d
NJM2902V
R122
75k
R240
6.8k
R130
10k
14
13
12
11
10
9
8
R125
10
14
1
2
3
4
5
6
7
R169
2.2k
13
12 +
C167
0.01
Q21
DTC144EU
R128 100k
R131
68k
VDD
I/O
CONT A
O/I
O/I
CONT D
I/O
I/O
CONT B
O/I
CONT C
O/I
VEE
I/O
R139
1M
C172
200p
R134
4.7k
7
R210
1M
PTTIN
PTTOUT
MICOUT
MICIN
NC
BUSY
NC
SIGOUT
OPT1
OPT2
OPT3
R114
680
R115
10k
C157
0.001
R249
10k
C160
0.001
Q23
DTC144EU
Q18
2SC4081
VCC
TX:5.0V
RX:0V
PWON
R221
22
R193
2.2k
D30
MA8082
C282
10
5
+
6
-
R209
1M
E
R116
4.7k
I
15 16
IN
R120
5V
OPV3
OPV2
OPV1
D
IC6c
NJM2902V
9
8
10 +
C159
0.001
R117
150k
R248
330k
R119
100k
T4
TMUT
DAREF
C87
15P(PMR)
18P(LMR)
C88
22p
C89
7p
D14
MI809
D13
MI809
C91
4p(L-band)
1.5p(H-band)
Q19
DTC144EU
R118
15k
C164 0.022
R208
1M
SO
SCK
SD
LVIN
EXTONE
C10
15P(PMR)
12P(LMR)
C156
2.2
R192
100k
R191
100k
R190
100k
R189
1M
C
DET
PWON
EXPTT
DIMIN
R113
3.9k
L17
656LZ-09K
IC4
BU4066BCFV
IC6b
NJM2902V
R135
27k
R201
1k
TX:0V
RX:5.0V
1
2
R186
100k
R136
68k
AFREF
C205
0.1
R184
100k
R185
NTCCF20124AH
(47k)
R183
100k
Q24
DTC144EU
RMUT
MMUT
TEMP
C203
0.01
D26
DAN202U
Q17
2SB1143
R129 560
H
Q36
2SD1664
C171
0.001
24
23
22
21
20
19
18
17
16
15
14
13
C174
0.01
VIN8
VOUT8
VOUT7
VIN7
GND
RESET
VDAREF
DO
VIN6
VOUT6
VOUT5
VIN5
C175
0.01
VIN1
VOUT1
VOUT2
VIN2
VDD
LD
CLK
DI
VIN3
VOUT3
VOUT4
VIN4
e
C176
0.01
C177
0.01
C178
0.001
DAST
SCK
SO
T1
T2
T3
T4
C179
0.001
C182
10
e
R145
10k
C183
0.01
R154
100k
C283
0.0018
R151
10k
DTCS
R152
10k
1
2
3
4
5
6
7
8
9
10
11
12
5V
C200
0.22
8-5
C180
0.001
C184
2.2
C185
0.1
C186
0.1
R153
10k
EXTONE
D25
MA111
HORNO
AFON
AFHPF
NWC
EXEN
R222
47k
D24
MA111
16
15
14
13
12
11
10
9
C152
0.001
VGG
R63
1M
T1
T2
C92
150p(L-band)
100p(H-band)
D16
HVU350
R64
1M
C95
0.001
R61
100k
C96
0.001
R62
100k
L18
656LZ-09K
C225
0.001
R219
EXB-V8V(1kx4)
OPV2
OPV1
PTTOUT
PTTIN
VDD
OENA
Q5
Q6
Q7
Q8
Q'S
QS
C224
0.001
R218
EXB-V8V(1kx4)
OPT3
OPT2
OPT1
OPV3
R188
1M
R216
EXB-V8V(1kx4)
EXST
SO
SCK
T5C
TMUT
1k
R187
1M
C291
C285
C270
C269
C268
C267
C266
C265
C264
AFO
SI
STRB
DATA
CLK
Q1
Q2
Q3
Q4
VSS
C11
20P(PMR)
15P(LMR)
R2
47
C153
0.001
C271
0.001
C276
6.8
C151
0.001
C272
0.001
C277
0.001
C297
470
C273
0.001
C278
0.001
C13
36p(L-band)
33p(H-band)
C5
0.5p
R3
47
C20
22p(L-band)
20p(H-band)
C274
470p
C279
470p
R111
100
C150
0.001
PI
PO
C275
47p
C280
47p
R112
100
15k(LMR,L-band only)
4.7k(Others)
D15
1SS352
C202
0.001
C90
4p
C93
1P
D17
HVU350
C97
220p(L-band)
100p(H-band)
RFATT
L20
54nH
C98
9p(L-band)
6p(H-band)
R66
100k
C100
0.001
R71
100
C102
0.01
D1
1SS375
D2
1SS375
C155
0.001
C17
0.001
C18
470p
C19
0.001
C23
C24
C25
C286
0.001
R67
10k
L21
33nH
C103
0.001
R72
100k
C105
6p(L-band)
4p(H-band)
C106
120p(L-band)
100p(H-band)
R75
1M
T3
R4
IC5
M62363FP-650C
IC11
BU4094BCFV
1
2
3
4
5
6
7
8
C9
ANT
W1
R167
4.7k
Q12
3SK239
C207
22
R182
47k
7.7V
C237
0.001
to
FRONT UNIT
J2
R143
100k
G
R217
EXB-V8V(1kx4)
47p
47p
47p
47p
47p
47p
47p
47p
47p
39 40
8
IC7c
NJM2902V
R177
47k
R155
10k
TONE
9
10 +
AFO
R237
C263
C262
C261
C260
C259
C258
C257
C255
C256
R215
EXB-V8V(1kX4)
5V
AFO
SI
OPT3
OPT2
OPT1
OPV3
OPV2
OPV1
PTT
PTTIN
DET
PWON
EXPTT
DIMIN
SO
SCK
SD
LVIN
GND
R142
100k
C181
0.001
R147
180k
R148
56k
R149
180k
R223
33k
R162
68k
47p
47p
47p
47p
47p
47p
47p
47p
47p
C236
0.001
C238
0.001
C292
C254
C253
C252
C251
C250
C249
C248
47p
47p
47p
47p
47p
47p
47p
47p
DAST
PLST
VIN
TEMP
MIC
R214
EXB-V8V(1kX4)
47k
47p
47p
47p
47p
47p
47p
47p
47p
NOIS
UNLK
EXEN
EXST
R213
EXB-V8V(1kX4)
R247
C247
C246
C245
C244
C243
C242
C241
C240
TONE
BEEP
DTCS
RFATT
R212
EXB-V8V
(1kX4)
J1
8V 1 2
CPU5V
GND
OPINT
OPCS
BUSY
BEEPOUT
TONE
BEEP
DTCS
RFATT
NOIS
UNLK
EXEN
EXST
DAST
PLST
VIN
TEMP
MIC
R141
100k
C284
390p
8V
T5
R5
5V
CPU5
OPINT
OPCS
BUSY
BEEPOUT
R5
1.5k(PMR)
1.8k(LMR)
C7
470p
L3
LA253
C4
470P
REV
L1
LA253
L2
LA243
5V
R140
100
R146
68k
W6
C188
0.047
7
C187
0.01
1M
R150
210k
IC7b
NJM2902V
R158
680k
R168
6
5 +
R159
10k
Q22
DTC144EU
C194
2.2
C294
0.01
R171
1M
C191
0.01
IC8a
NJM2904V
R165
47k
R170
1M
AFOUT
R172
15k
DET
MICOUT
MICIN
R181
4.7k
C201
10
R179
150k
MIC
R180
39k
AFREF
R178
33k
4
C213
0.001
R156
680k
5
+
7
6
IC8b
NJM2904V
1
R161
470k
C199
0.1
R176
680k
C296
0.001
R235
10k
R234
100k
IC7a
NJM2902V
8
C189
0.01
R160
15k
C197
0.1
11
3
+
2
-
C190
0.01
R157
12k
R163
1M
14
R226
180k
A
13
12 +
C192
0.01
AFHPF
1
C295
0.001
R164
4.7k
C288
0.01
4
R227
680k
a
b
c
2
3 +
D31
DA204U
R175
10k
C196
0.1
R230
2.2k
C198 15p
R174 680k
R236
100k
L5
LA253
5V
R229
47k
B
R166
120k
C287
100p
D3
MI407
L19
54nH
R69
47
D18
HVU350
T4
T5
5V
10p(L-band)
C15 9p(H-band)
0.001
FWD
4
Q35
DTA144EU
RX:0.63V
R73
100k
3
RX:0V
C104
0.001
R76
1M
D19
HVU350
D20
HVU350
D21
HVU350
R74
100k
2
36p(PMR,L-band only)
27p(H-band)
18p(PMR,L-band only)
12p(H-band)
C99
1.5p
C109
0.001
L23
47nH
C110
0.001
L24
0.1µH
R81
100k
R83
10k
C122
0.001
C123
0.01
R86
220
C126
11p
C129
0.01
FI1
FL-285
Q14
2SC2714
C118
15p
C112
15p(L-band)
8p(H-band)
Q13
3SK166
RX:1.2V
C111
120p(L-band)
100p(H-band)
C113
5p
1
1k(PMR)
100(LMR,H-band)
330(LMR,L-band)
GND
L6
RX:4.7V
C101
0.001
C115
0.001
L25
0.47µH
C121
68p
C120
0.001
RX:0V
L22
33nH
R89
560
R87
820
C116
15p
C124
0.001
FI1a
C117
56p
C128
0.01
R77
100
R84
100
C119
0.01
R90
1.5k
R91
100k
R92
470
C127
0.01
Q15
2SC4081
470
R78
4.7k
C107
1p
FI1b
R93
10k
R96
1.8k
C134
0.001
R97
FI2
SFPC450G
2.2V
C130
0.01
C132
0.001
3.6V
R95
1.5k
C290
0.01
16
15
14
13
12
11
10
9
C131
100p
MIXIN
GND
N-REC
N-DET
RSSI
IFOUT
QUAD
AFOUT
C133
0.033
C135
0.01
R98
100k
OSCIN
OSCOUT
MIXOUT
VCC
IFIN
DEC
FILOUT
FILIN
X3
CDBCA450CX24
SD
1
2
3
4
5
6
7
8
C136
1
R100
330k
R105
15k
O
C138
220p
R241
100k
R101
390
L26
1µH
C141
18p
IC3
TA31136FN
R102
1.5k
C137
0.1
I
C139
220p
FI4
SFPC450E
R104
10
O
R106
15k
C143
12p
L27
1µH
C145
10p
R110
47k
C149
0.1
R99
2.2k
(L-band)
3.3k
(H-band)
FI3
SFPC450G
I
C140
10p
C148
0.1
D22
DAN202U
D23
DAN202U
C142
4p
GND
R8
270
(PMR only)
C46
22p
R10
27(PMR)
5.6(LMR)
C30
0.001
C32
0.001
R15
100
R17
1.8k
C35
0.001
R19
150
C38
0.001
D29
DA221
18p(LMR,H-band only)
22p(Others)
5V
NOIS
R107
22k
R109
10k
R108
22k
NWC
C146
0.01
C147
0.01
Q16
DTA144EU
C26
0.001
C29
R5
C144
15p
L7
L4
LW-25
18p(LMR,L-band)
8p(PMR,L-band)
12p(H-band)
IC1
SC-1364(PMR,L-band)
SC-1365(PMR,H-band)
M68702L(LMR,L-band)
M68702H(LMR,H-band)
Q1
2SC4703
Q2
2SC4215
D6
MA77
R9
56
R6
22
C22
22p(L-band)
20p(H-band)
R12
560
C27
0.001
C28
470p
R13
2.2k
C31
470p
L8
68nH
C299
0.001
C33
15p(PMR)
18p(LMR,L-band)
8p(LMR,H-band)
R11
27(PMR)
5.6(LMR)
C39
10p
R21
5.6k
C43
12p
C45
5p
C48
0.5p
R24
100
Q3
2SC4215
Q4
2SC4215
R25
4.7k
C50 0.001
D5
MA77
L9
0.12µH(L-band)
0.15µH(H-band)
R35
220
C53
1.5p
Q5
2SC4215
R14
22
R16
3.9k(PMR)
8.2k(LMR)
C37
0.001
R246
150
R23
4.7k
C40
0.001
L11
0.1µH
R27
39k
C42
0.001
L12
0.1µH
R29
68k
C44
0.001
L13
0.1µH
R31
68k
C47
0.001
R18
100
R22
100
R26
390
R28
470
R30
680
C49
0.001
R34
8.2k
C51
0.001
C41
18p
Q6
2SC4215
Q8
2SC4226
R36
8.2k
D8
D7
HVU350 HVU350
C54
100p(L-band)
56p(H-band)
C55
33p
C56
0.001
D10
MA77
C57
0.001
C281
0.001
D9
MA77
Q9
DTC114EU
C36
47p
10nH(LMR,H-band only)
47nH(Others)
VHF MAIN UNIT
Q38
2SD1664 R7
33
R32
100
R38
1k
R33
470
C63
10
R39
47k
R40
4.7k
D11
MA111
R41
1k
R47
1k
C64
0.001
Q7
2SC4226
R37
1k
22k
18k
R60
15k
F
C58
0.001
C59
0.1
R59
R238
MOD
IN
C52
2p
L14
MC152-E558CN
-100024
L15
2.7µH
R42
560
R245
10k
C70
47p
C69
0.001
GND1
IN2
VCC2
XB
XI
XO
GND2
CP2
FI2
FO2
C67
0.001
C72
47p
C71
47p
C68
0.01 R45
2.2k
R50
100
R49
EXB-V8V
(1kx4)
C73
0.001
C74
20p(L-band)
9p(H-band)
C75 9p
(H-band only)
32nH
VCC1
IN1
ENB
CLK
DATA
T1
LOK
CP1
FI1
FO1
R44 10
20
19
18
17
16
15
14
13
12
11
C60
2.2
1
2
3
4
5
6
7
8
9
10
R46
10k
R242
470
Q10
2SC4081
R20
8.2k(PMR)
15k(LMR)
IC2 µPD3140GS
C66
0.001
R51
100
PLST
SCK
SO
UNLK
L16
R48
47k
C79
56p
C80
12p
D12
HVU17
C86
0.001
CR-575
C65
0.001
15.3MHz
X1
R233 C85
1k
2.2
Q11
2SK880
R43
2.2k
REF
BAL
C82
33p
C61
0.68
R55
75k
CP1
R54
47k
R232
470k
C62
0.001
LVIN
R243
68
T5
R220
100
VHF (7610) MAIN BOARD SCHEMATIC
to FAN
for
OPTIONAL
CABLE
DET
AFOUT
NWC
HV
N/W
SW
N/W
SW
8V
FI3
D12
IC11
IC11
R8V
D13
FI1
IC6C,D
J1
AF
AMP
AF
SW
AMP
IC9
IC4A
MCF
AF
SW
D/A
D8
D7
D3,D4,D5
BPF
BPF
TX/RX
SW
D9
BPF
RF
AMP
BPF
HPF
FOR
LPF
LPF
LPF
Q2
IC12
FI2
Q5
B
5V
RMUT
R8V
D10
Q3
R8V
N/W
SW
TXC
REV
46.35MHz
T4
T2
T3
T1
T8V
5V
Q22
J2
H
D1
X1
G
1
2
AF
MUTE
AFO
SHIFT
SW
RFATT
FM IC
IC1
BEEP
Q32
Q33
APC
DET
LPT
Q1
Q4
LVIN
AMP
AFATT
AFON
RF
ATT
IF
AMP
5V
AFHPF
2nd
Lo
T8V
T8V
VCC
T8V
HV
APC
CTRL
IC7B
D18,D19
NOIS
Q23,D20,D34
SD
MICOUT
TX/RX
SW
RX
VCO
YGR
AMP
BUFF
DRIVE
AMP
Q21
Q20
Q19
PWR
AMP
IC5
IC4B
Q17
Q18
T4
MICIN
IC7A
IC11
IC11
5V
MIC
LIMIT
AMP
AMP
A
IC8B
SUPRATTER
AF
SW
AF
SW
MOD
2
T1
TXC
BUFF
N/W
SW
TONE
IC6B
TXC
NWC
21
D/A
IC12
10
T3
DTCSOUT
14
11
T4
TX
VCO
DTCS
22
8V
APCV
Q24
Q26
Q27
VCO
SW
23
3
T2
Q35
DTCS
8V
TXC
24
IC8A
MMUT
SIGOUT
N
O
I
S
O
U
T
N
O
I
S
I
N
5V
BUFF
BUFF
Q28
Q30
LPF
VCC
Q25,D22,D33
+5
REG
CPU5V
D21
REF
8V
SO
SCK
DAST
LOOP
FIL
L32,L33
HORNO
AFATT
2nd
Lo
SO
SCK
EXST
EXEN
EXP
AFHPF
8V
IC10
TMUT
MAIN UNIT
5V
5V
TXC
IC13
PLL
IC
BUFF
Q34
HV
45.9MHz
REF
15.3MHz
SO
SCK
PLST
UNLK
RM
TCXO
8V
IC2
VOLT
DET
VCC
DIMIN
EXPTT
PWON
RFATT
TEMP
DET
DS1
DTCSIN
TXC
COMMON LINE
LINE
T8V
LED
CTRL
D
I
M
CONV
LCD
R8V
Q10
Q11
D15
8V
BACK
LIGHT
+8
REG
DTCSOUT
X2
FRONT UNIT
Q3
PWON
Q14
Q15
+5V
R8V
DS2-DS11
POWER
SW
Q29
BPF
NWC
MM
W6
IC3
MOD
N
O
I
S
CTDA0
S
D
L
V
I
N
V
I
N
T
E
M
P
5V
CPU5V
T8V
Q8
Q9
D14
CPU5
RMUT
MMUT
+5V
CTRL
R8V
RX LINE
TMUT
TX LINE
DATA BUS LINE
CPU5V
Q6
Q12
Q13
CTDA2
AF,CH U/D,Etc
RM
SWITCH x8
SCK
SI
SO
OPINT
OPCS
BUSY
OPT1
OPT2
OPT3
OPV1
OPV2
OPV3
POSW
POSW
CPU
HANG
CPU5V
Microphone
RESET
HANGER
PTTIN
CLONE
I/F
8V
Q4,D2
MMUT
MM
MIMUT
O
CTRL
CTRL
P
D24,Q37
D25,Q46
J4
I
O
OPV1
OPV2
OPV3
GND
OPT3
OPT2
OPT1
SIGOUT
MDWN
BUSY
AUX
MICIN
MICOUT
PTTOUT
PTTIN
N
B
U
S
IC1
PTT
CLIN
RXMUT
T
RES
IC2,Q1,D1
HANG
RMUT
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
SCK
SI
SO
OPINT
OPCS
REM
AFOUT
DET
RXMUT
BEEPO
AFON
MIMUT
HV
5V
GND
HV
Q38
DIMIN
C
C
T
C
I
N
5V
AFO
MIC
DET
Q39
DISC
HORN
SW
B
M
M
T
O
N
E
D
T
M
F
IN
PTT
PTTIN
CLONE
MIC
HV
DIM
HORN
AFO
HORNO
CLOUT
J5
DIM
SW
SHIFT
SW
1
2
3
4
5
6
7
8
9
10
11
AFO
DET
X1
D5
Q40
OPTION
LPF
EE
PROM
Q5
CONV
MUTE
TONE
SIG
SW
UT-96
IC3
BEEP
SIGOUT
UT-105
EXPTT
Q7
BEEPO
Q10
UHF (7640) BLOCK DIAGRAM
November 1998
Part No. 001-7600-001
8-6
8-7
November 1998
Part No. 001-7600-001
UHF (7640) MAIN BOARD BOTTOM VIEW
FOLDOUT
→
A N T E N N A JA C K
W6
VCC
GND
EP12
M P 10
D 28
W2
J6
2 - G nd
1 - HV
J6
W6
1
L1
B LK
D 16
IC 5
MP8
W6
RED
C 19 6
R 17 3
C 19 5
EP2
EP2
EP2
C 84
+
C 95
C 99
C 94
C 33 7
C 98
W8
C 28 5
C 96
C 28 6
C 97
R 69
Q 18
C 81
Q 17
C 92
R 66
I
R 11 3
R 65
IC 3
L1 6
C 10 1 L1 7
Q 14
C 10 0
O
C 30 4
C 80
Q 13
C 74
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
-
GND
5V
HV
M IC M U T E
AFO NO P
BEEPO U T
RXM UTE
DET
AFO UT
NC
OPCS
O P IN T
SO
SI
SCK
12346578910
11
12
13
14
15
P T T IN
PTTO UT
M IC O U T
NC
NC
BU SY
NC
S IG O U T
O PT1
- O PT2
- O PT3
- GND
- OPV3
- OPV2
- OPV1
IC 9
C 76
2 - SPG N D
1 - SP
1 - 8V
3 - C PU 5V
5 - GND
7 - O P IN T
9 - O PC S
11 - B U S Y
13 - B E E P O U T
15 - T O N E
17 - B E E P
19 - D T C S
21 - R F A T T
23 - N O IS
25 - U N LK
27 - E X E N
29 - E X S T
31 - D A S T
33 - P LS T
35 - V IN
37 - T E M P
39 - M IC
2- 5V
4 - AFO
6 - SI
8 - O PT3
10 - O P T 2
12 - O P T 1
14 - O P V 3
16
18
20
22
24
26
28
30
32
34
36
38
40
-
OPV2
OVP1
PTT
P T T IN
DET
PW ON
EXPTT
D IM IN
SO
SCK
SO
L V IN
GND
R 18 7
R 18 9
R 18 8
R 20 6
C 28 1
C 23 2
R 20 4
5V
R 20 5
C 21 3
Q 37
C 21 1
TXC
- PTT
- GND
IN
GND
D IS C
GND
AFO
GND
HORN
D IM
HV
R 26 7
R 18 6
C 23 6
C 33 5
Q 39
IC 11
R 22 3
R 21 7
R 10 8
C 17 7
C 33 3
C 24 2
R 23 2
R 21 6
R 17 C 31 7
L9
C 31 3
L1 0
R 20
C 31 1
L1 1
R 19 8
C 33 2
C 22 5
C 24 1 R 21 8
2
1
40
39
J3
Q 36
J4
16
C 27 9
C 27 4
R 23 8
R 24 8
R 24 6
C 26 3
C 27 2
R 25 8
R 15 5
C 26 4
R 26 5
C 26 2
C 27 3
C 27 1
November 1998
Part No. 001-7600-001
L1 3
C 12 6
C 12 7
R 99
R 45
R 47
R 10 1
C 13 0
X1
C 57
C 30 3
R 44
C 63
R 48
C 62
+
F I1
R 36
C 61 C 58
R 46
C 49
R 40
IC 1
C 50
C 56
C 34 9
R 24 7
R 24 5
R 23 7
R 23 9
UHF (7640) MAIN BOARD TOP VIEW
R 14 8
R 14 7
R 15 3
Q 40
R 23 6
C 23 9
L1 4
F I2
F I3
R 94
C 13 3
R 14 6 R 14 8
C 12 9
R 10 0
C 12 8
C 28 2
R 25 1
IC 6
C 13 4
15
1
30
R 96
R 32
R 10 7
C 17 6+
Q 38
C 28 8
R 10 9
C 33 1
C 33 4
R 21 4
C 28 7
R 21 5
1
C 16 7
R 11 6
Q 23
R 14 0
C 14 5 C 34 6
C 14 4
R 13 5
R 12 5
R 13 4 C 16 1 R 13 9
C 15 0 R 12 3 W 9
Q 30
L3 0 R 13 8
R 12 4
C 16 2
C 16 5
C 15 1
Q 25
R 13 6
C 15 4
L3 1
C 16 3 C 16 4
C 15 2
C 15 3
C 14 3
C 44 C 45
R 20 8
R 21 3
J5
L8
C 34 8
C 31 2
R 97 Q 22 R 95
R 96
C 23 4
C 23 5
C 29 5
C 21 2
C 17 8
11
10
987654321-
L2 6
X2
EXTM
C 20 7
11
R 19 1
D 25
R 11 1
J5 (T o O p t Cable)
L2 3
R 11 0
IC 13
R 11 5
R 11 7
C 14 1
CP1
C 20 9
D 24
C 28 9
J3 (T o F ro nt U nit)
C 20 6
L7
C 31 0
R 19 0
J2
1
M P 1, 2
C 14 2
C 32 7
TMUT
C 30 9
C 31 5
C 33 0
C 19 8
C 71
C 75
C 23 8
C 67
C 31 4
D6
C 19 9
C 32 8
C 32 5
C 68
J2 (T o Sp kr)
8V
C 32 6
C 70
L5
C 32 9
R8
C 78
D5
D4
L4
Q 45
Q 44
W 11
R 58
C 77
T8
C 18
C 17
C 34 2
Q 12
IC 2
J4 (T o O p tion al Un it)
CPU5
C 29 8
C 19 4
C 13
W 12
L1 9
DET
C 93
R8
R9
R 70
L3
L6
W 10
C 79
C 91
R 11 2
L2
D3
C 52
C 51
R 41
8-8
L1 5
F I1
C1
C2
R4
47
C7 7p
C9
C8 0.001
P -LML)
P -MH, L -ML/MH)
L -L)
L -H)
SC-1322( P -L)
SC-1323(Other P )
SC-1236( L -L)
SC-1237( L -ML)
SC-1325( L -MH)
SC-1326( L -H)
IC4b
R63
1M
- 6
+ 5
T4
R66
68k
R273
820k
TMUT
Q16
DTC144EU
C88
0.022
R68
2.2k
C90
0.1
C85
0.001
R61
18k
C89
0.001
R67
4.7k
C91
4.7
C92
10
C286
C285
C97
C96
C344
C343
C95
C337
C188
4.7
R119
R122
10k
R260
12k (MH only)
8.2k(Other)
1p(MH only)
3.5p(H only)
R121
47
C138
0.001
L25
0.18µH
C137
470p
D21
1T365
R276
L26
MC152-E558ANA-100051=P3(L,ML)
MC152-E558ANA-100050(MH, L -H )
C293
0.001
D34
HVU350
R275
1k
D20
HVU350
C147
1p
3.3k( P -ML only)
3.9k(Other P )
2.7k( L -ML only)
3.3k(Other L )
(*)TX:2.8V
RX:2.7V
10( L )
47( P )
R274
1k
C149
C151
5p( L )
2p( M )
8p( H )
(*)TX:0V
RX:2.9V
R114
10
R120
100k
C340
0.001
C341
0.001
C296
0.1
( L only)
L27
1µH
R126
560
L22
0.56µH
D22
HVU350
Q26
DTC114EU
C155
0.5p
C152
8p(L/MH)
4p( ML )
3p( H )
Q27
DTC144EU
47p
0.001
47p
0.001
0.001
0.001
22
2.2
C101
5p
C98
0.001
C304
12p
C99
47p
C142
10p( L )
6p ( ML )
5p ( MH )
3p ( H )
R123 4.7k
7
R65
68k
(*)TX:2.1V
RX:0V
D33
HVU350
C336
47p
C104
470p
C102
C100
22
R72
C105
470p
C143
12p( L )
8p ( ML )
6p ( HH )
5p ( H )
R125 10
Q25
2SC5110
TXC
C169
12p
C153
0.001
Q28
2SC5107
R124 4.7k
R271
10k
R64
150k
(*)TX:11.5V
RX:13.3V
Q17
2SC4081
R69
150
L23
MC152-E558ANA-100051=P3
C150
10p( L )
C148
8p ( ML )
5p(L,MH)
15p( MH )
4p(ML/H)
4p ( H )
3.4V
C87
47p
C139
8p( L )
6p( ML )
4p( MH/H )
Q23
2SC5110
L24
1µH
C154
47p
Q29
2SC5107
C346
0.7V
( L only)
C141
18p( L )
15p( ML/MH )
12p( H )
R115 6.8k
R117 1
C144
0.001
C145
47p
C295
0.1
R130
150k
6.4v
0.001
( L only)
C160
7p
0.7V
R116 6.8k
(*)TX:2.9V
RX:0V
W9
C146
0.5p
L28
27nH
C157
470p
R132
180k
R272 1k
C161
470p
R134
4.7k
R135
4.7k
3.1V
C159
2p
C171
4p
C173
12p
R129
C156
470p
R131
220
R133
10
C166
0.001
2.5V
C158
12p
Q24
DTC114EU R118
1k
EP2
22( P -H only)
33(Other P )
39( L -L only)
27(Other L )
39( P -L only)
27( L -H only)
33(Other)
6.8V
R128
10
(*)TX:9.1V
RX:0V
L17
18nH
R71
R74
220
C107
470p
C108
C106
7p ( P only)
Q19
2SC4703
7p( P )
8p( L -H)
10p(Other)
C324
47p
L18
22nH
R73
2.2k
C297
47p
C110
0.001
L20
18nH
R75
100
C112
0.001
R78
1.5k
C338
R80
220
TX:1.7V
RX:0V
Q18
2SB1143
IC5
C86
47p
7p(L/ML)
6p( L -MH/H)
5p( P -MH)
C94 6p( L -ML)
4p( L -MH)
3p( L, P -ML)
5p( P -MH)
1p( L -H)
C302
0.001
R3
100
C5
0.001
W10
R62
18k
R6
100
3p(
4p(
6p(
5p(
November 1998
Part No. 001-7600-001
C214
8p
C215
8p
R174
470
J6
C233
0.001
R175
10k
C198
10
R178
100k
C200
0.001
C205
0.001
C199
0.001
C299
47p
C207
470p
C316
47p
R162
10
7.6V
HV
GND
20
19
18
17
16
15
14
13
12
11
C204
0.47
R181
1k
1k
1k
1k
1k
C216
C217
C218
C219
22p
22p
22p
0.001
1.0V
R179
1k
Q39
DTC144EU
HORNO
DET
Q34
2SK536
R208
10k
EXPTT
C236 0.1
R207
1k
J5
HV
DIM
HORN
GND
AFO
GND
DISC
GND
IN
GND
PTT
0.001
0.001
47p
0.001
0.001
R187
R188
R189
R190
R180
10k
C201
0.1
GND1
IN2
VCC2
XB
XI
XO
GND2
CP2
FI2
FO2
C203
0.47
1
2
3
4
5
6
7
8
9
10
PLST
SCK
SO
UNLK
DIMIN
C202
0.022
VCC1
IN1
ENB
CLK
DATA
T1
LOK
CP1
FI1
FO1
C210
2.2
15.3MHz
C235
C234
C287
C288
C289
5V
SIGOUT
R257
47
0V
R209
100k
5.1V
Q40
2SJ144
R210
1M
R211
100k
HV
0V
R212
1M
C238
10
D27
MA111
to
DC FAN
Q38
DTC144EU
(*)TX:2.8V
RX:2.7V
NWC
DTCS
TXC
RMUT
E
5.0V
C213
0.001
C332
47p
RX MUTE:0V
0.34V
p-p
IC10
µPD3140GS
F
C177
0.001
TX:4.7V
RX:0V
C226
0.01
D
C178
47p
Q36
DTC144EU
C206
10
0V
L34
18nH
TX:0V
RX:5.1V
C208
0.0047
R191
56
WIDE:0V
NAR:0.6V
1.9V
(*)TX:3.3V
RX:3.2V
Q33
2SK880
R177 CP1
68k
AFO
R184
2.7k
C318
10p
2.5V
C212
4.7
R254
470k
R193
470k
C306
47p
C222
18p
2.2V
C321
47p
X2
CR-601
1 VCON VCC 4
2 GND
OUT 3
2.4V
IC7a
NJM2904M
C209
0.001
Q35
2SC4081
1
4
C211
0.1
2 3+
C223 12p
5.0V
8
R186
100k
R194
180k
R267
270k
R195
220k
R185
100
R154
100
14
13
12
11
10
9
8
R278
10k
I/O
VDD
O/I
CONT A
O/I
CONT D
I/O
I/O
CONT B
O/I
CONT C
O/I
VEE
I/O
Wide:oV
Narrow:4.8V
C331
470P
0.001
0.001
0.001
0.001
0.01
SCK
SI
SO
OPINT
OPCS
NC
AF OUT
DET
RXMUT
BEEPO
AF ON
MIMUT
HV
5V
GND
VIN6
VIN1
VOUT1 VOUT8
VOUT2 VOUT7
VIN2
VIN7
VDD
GND
LD
RESET
CLK
VDAREF
DI
D0
VIN3
VIN6
VOUT3 VOUT6
VOUT4 VOUT5
VIN4
VIN5
24
23
22
21
20
19
18
17
16
15
14
13
C333
47p
C225
0.01
R199
470
47p
47p
47p
47p
T3
T4
TO OPTION UT-96
UT-105
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
DAST
SCK
SO
C231
C230
C229
C228
C227
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
C328
C327
C326
C325
T1
T2
1
2
3
4
5
6
7
8
9
10
11
12
C183
0.1
C221
0.0027
IC11
BU4066BCF
1
2
3
4
5
6
7
4.9V
IC12
M62363FP-650C
C239
0.001
C241
47p
OPV1
OPV2
OPV3
GND
OPT3
OPT2
OPT1
SIG OUT
NC
BUSY
AUX
MIC IN
MIC OUT
PTT OUT
PTT IN
R198
10k
R205
10k
NWC
AFHPF
AFATT
HORNO
C240
0.001
J4
C
8-9
Q37
D24
DAN202U DTC144EU
C232
0.01
RMUT
EXEN
C242
47p
to Front unit
J2
Through
W3 of front unit
5V
AFO
SI
OPT3
OPT2
OPT1
OPV3
OPV2
OPV1
PTT
PTTIN
DET
PWON
EXPTT
DIMIN
SO
SCK
SD
LVIN
GND
STRB
DATA
CLK
Q1
Q2
Q3
Q4
VSS
RX MUTE:
5.1V
16
VDD
15
OENA
14
Q5
13
Q6
12
Q7
11
Q8
10
Q,S
9
QS
1M
1M
1M
100k
100k
100k
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
1
2
3
4
5
6
7
8
R218
R217
R216
R215
R214
R213
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
EXST
SO
SCK
TXC
TMUT
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
8V
CPU5V
GND
OPINT
OPCS
BUSY
BEEPOUT
TONE
BEEP
DTCSIN
RFATT
NOIS
UNLK
EXEN
EXST
DAST
PLST
VIN
TEMP
MIC
R204 10k
MA111
R206
100k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
R235
R226
R234
R225
R233
R224
R232
R223
R231
R222
R230
R221
R229
R220
R228
R219
R227
J3
D25
IC13
BU4094BCF
C252
C243
C253
C244
C254
C245
C255
C246
C256
C247
C257
C248
C258
C249
C259
C250
C260
C251
C284
R236
R245
R237
R246
R238
R247
R239
R248
R240
R249
R241
R250
R242
R251
R243
R252
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
OPINT
OPCS
BUSY
BEEPO
TONE
BEEP
DTCS
RFATT
NOIS
UNLK
EXEN
EXST
DAST
PLST
VIN
TEMP
LVIN
SD
SCK
SO
DIMIN
EXPTT
PWON
DET
PTTIN
PTTOUT
OPV1
OPV2
OPV3
OPT1
OPT2
OPT3
SI
AFO
MM
RM
R176
1M
LVIN
8V
5.1V
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
CHASSIS
W11
C3
0.001
100
1
R70 2.2
TX:8.9V L19
RX:0V 15nH
6.8V
2.8V
Q30
2SC5110
6p( L / P -H)
7p( P -L,M)
C103
C109
6p( L )
7p( L )
R143
1k
W13
R76
22
C111
0.001
18nH( L -H
only)
22nH(Other)
Q20
2SC5107
( L -L/ML/MH only)
L32
0.56µH
W14
TX:7.4V
RX:0V
CPU5V
MIC
8V
C279
C269
C278
C268
C277
C267
C276
C266
C275
C265
C274
C264
C273
C263
C272
C262
C271
C261
C270
W12
D30
MA111
C93
C15
47p
T1
RFATT
C314
47p
C315
47p
D8
HVU350
C27
47p
T2
L16
LA-242(Other)
LA-232( P -MH, L -H)
W2
(*)TX:3.2V
RX:2.8V
D1
MA713
R8
220
R9 220
C6
0.001
C16
470p
L6
LW-25
J1
L1
REV
R1 100k
C18
2.5p
C10
9p(L,ML)
8p( L -MH/H)
6p( P -MH)
C12
5p(Other)
4p( P -MH)
3p( L -MH)
C17
D4
MI809
D5
MA77
R10
4.7k
C19
0.001
R12
10k
Y655LY-02M=P3
( L -H only)
Y655-03K
(Other)
R127
4.7k
(PMR only)
L30
27nH
C162
6p
L33
0.56µH
5 TONE
3.2V
p-p
W15
R77
3.3k
L21
470
R277
R81
4.7k
C118
470p
R137
4.7k
D23
MA111
C167
10
C345
0.001
C119
0.001
R268
10k
R269
39k
W16
D6
1SS352
D7
HVU350
R11
220k
C26
0.75p(H only)
7p( L )
6p( ML ) 1p(Other)
5p( MH/H )
C21
L8 15nH
C28
1.5p( L )
0.5p(ML/MH)
Q1
DTA144EU
100( P )
10 ( L )
C170
5p
C176
2.2
7p
6.7V
L31
18nH
(LMR only)
DTMF
3.5V
p-p
180k( P )
220k( L )
R15 47k
R18 68
C310
47p
R79
22
C115
0.001
C113
C172 5p
R146
82k
7p( P )
5p( L -H)
6p(Other L )
Q31 2SC4081
C164
6p
C175
0.1
R5
R2
2P( L -H only)
8p(Other)
D17
DA221
TX:2.3V
RX:0V
C165
6p
R145
75k
R138
270
C174
0.1
R139
18
R140
270
R144
22k
D3
MI407 ( L )
UM9410F( P )
ANTENNA
LA-382( L -H only)
LA-232(Other)
R7 47
FOR
RX:2.3V
TX:7.6V
RX:0V
TX:Approx.
+7dBm
R136
220
DTCS
0.85V
p-p
R141
10k
2.4V
CTCSS
0.7V
p-p
C180
0.0039
MICOUT
C185
0.1
R162
470k
C24
1p ( L )
C25 0.5p(Other)
C32
1p ( H )
1.5p( ML )
2p ( MH )
C31 0.001
T3
R84
1k
R85
10k
R87
10k
C121
10p
2.1V
C163
0.001
4
C319
0.1( P )
0.0047( L )
IC6b
NJM2904M
2.4V
5
+
7
6
R148
100k 2.4V
R142
10k
C13
47p
L4
LA382( L -H only)
LA232(Other)
C11 2p( L )
1p(Other)
L3
L2
LA-382
TX:0.7V
RX:0V
L5
Y655LY-03K=P3
RX:2.9V
47p
L9
4.7*H
L10
15nH
D9
HVU350
C311
47p
C35
47p
T4
Q21
2SC5107
DTCS
TONE
C179
0.1
1
R151
MICIN
R159
33k
R264
10k
R158
15k
R261
100k
C186
0.1
8
3
+
2 -
IC8a
NJM2904M
C184 22p
2.0V
TX:2.0V
RX:3.8V
C283
470p
A
C335
47p
R147
10k
R279
82k( L only)
R150
100
R265
10k
R161
470k
R266
10k
R156
56k
R160
47k
C187
0.1
C189
0.1
2.0V
R157 1.2M
C334
47p
Q32
DTC144EU
D29
DAN202U
R164
47k
C322
0.22
BEEP
AFO
AFO
R170
6.8k
G
C191 0.012
AFON
AFATT
D32
MA111
C197
0.001
Q41
DTC363EK
R258 47k
4
R168 100k
TX:2.0V
RX:5.0V
IC8b
NJM2904M
5
+
7
6 -
2.0V
C349
0.22
3.9V
R152
5.6k
R155
10k
R166
10k
8
3
+
- 2
R163
10k
1
IC4a
NJM2904M
H
R153
10k
R165
10k
R167
100
3.9V
R169
1k
C291
0.1
+
CHASSIS
3.9V
7.8V
C281
0.1
J2
1.1V
C190
0.1
R259 22k
3
IC9
LA4425A
C292
0.047
1
2
R255
10k
4
Q46
DTA144EU
R13
220k
R14
10k
C14
5P( P )
4P( L -L,ML)
P ( L -MH)
W7
C117
47p
7.9V
C282
22
C194
220
P1
R172 10k
C196
0.001
SP1
R173 10k
J1
SP JACK
C193
0.1
C308
1p
( L only)
VCC
5V
8V
CPU5V
13.6V
C29
C116
0.001
2.4V
R82
2.7k
12
14
+
13
IC6d
2.4V NJM2902M
AFREF
6.7V
5
C34
7p( L )
6p( ML )
4p(MH/H)
R20
2.2k
R21
220k
D10
HVU350
R86
1k
C298
47p
C329
47p
R94 1.5k
C330
47P
C195
470
TX:0V
RX:0.9V
C323
10p
C126
0.047
TX:0V
RX:7.8V
Q45
DTA144EU
C347
0.001
( L only)
C127
0.047
C342
0.001( L only)
R95
47K
R98
47k
2.4V
8
IC6c
NJM2902M
0V
Q2
2SK272
2.5p(H only)
4p(Other)
D18
MA77
10
+
9 -
R19 10
RX:2.3V
R83
4.7k
C128
0.047
Q44
DTC144EU
2.4V
TX:0V
RX:2.5V
C20
1.5p
8p( P -MH,other L )
7p(Other P , L -H)
D19
MA77
R102
1
R99
2.2k
C317
47p
TX:0V
RX:7.7V
5V
HV
T8V
R8V
C339
0.001
( L only)
2.4V
2.4V
R97
47k
AFOUT
DET
7
IC7b
NJM2904M
Q42
DTC144EU
R96
91k
R105
22k
IC6a
NJM2902M
B
6
5 +
4.7
R270 1M
C129
0.047
R100
36k
2.4V
2.4V
2.4V
C307
C130
0.047
R101
4.12k
11
470p
R104 22k
Q22
2SC4081
C36
0.5p
C120
470p
TX:4.7V
RX:0V
AFHPF
C22
6p( L )
5p( ML,H )
4p( MH )
C23
2p ( L )
1.5p(ML/MH)
C30
0.001
R22
10k
C312 47p
0.01
330k
R103
220k
1
C132
0.56
C133 0.1
C135 2.2
C131
4
2
3 +
C134 0.001
R108 12k
R109 10k
R45
R106 270k
R111
100k
2.4V
R107 100
C39
7p( L )
6p( ML )
5p(Other)
R25
100k
C40
47p
R29
R27
R24
10k
R16 47k
L7 15nH
RX:2.2V
R23
220k
C42 3p
R25 100k
270
C43 0.001
R28
18
C41 1p
3.4V
5.0V
C348
0.22
C313
47p
C38
C33
47p
C37
1p ( L )
0.3p(Other)
15nH
L12
39nH
C303 0.001
C44 0.001
R30 68
C300 4p
FI1a
FI1b
C47 12p
Wide:0.6V
Narrow:0V
C60
C45 68p
L14
56nH
C48
0.001
R33
C46
330
0.001
FI1 FL-287
C301
4p
R39
R38
C55
Q5
2SC4081
0V
R31
22
Q3
2SK241
TX:0V
RX:0.7V
R34
330
C54
0.001
TX:0V
RX:0.7V
R37
1.2k
47k
47k
0.001
0.001
WIDE:0V
NAR:4.9V
100p
1.5p(ML/MH)
0.5p(H)
L11
TX:0V
RX:7.9V
270
R32
100
L13
0.12µH
C50 68p
C49 0.001
R36
100
L15
0.18µH
C57
4.7
R42
100k
Q4
2SC4215
C52
TX:0V
RX:6.6V
R35
120K
C51
100p
C59
0.001
R44 820
C65
0.01
R40
2.2k
NOIS
SD C56
C62
270p
16
15
14
13
12
11
10
9
TX:4.7V
RX:0V
R110
NTCCF20124AH(47k)
TX:0V
RX:7.3V
TXC
Q11
DTC114EU
C66 0.01
MIXIN
GND
N-REC
N-DET
RSSI
IFOUT
QUAD
AFOUT
C61
270p
Wide:5.1V
Narrow:0V
Q7
DTA144EU
C72 1
C63
R49
15k
0.1
R50 22k
R51 12k
47P
CPU5V
R46
100k
OSCIN
OSCOUT
MIXOUT
VCC
IFIN
DEC
FILOUT
FILIN
X1
CDBCA450CX24
TXC
TEMP
R113
100k
4.5V
O
C80
0.1
C81
0.1
PWON
R112
330k VIN
G
D15
1SS302
R53 15k
NWC
I
TX:0V
RX:8.5V
TXC
TMUT
W8
C79
10
IC3 AN78L05M
TX:0V
RX:7.9V
Q10 2SD1664
IC1
TA31136FN
1
2
3
4
5
6
7
8
C64
0.1
C71 10
5.0V
O
D31
DAN202U
R57 4.7k
3
2
1
R58
4.7k
D12
DAN202U
C70
C69 4.7
4
6
5
C77
0.001
C78
10
Q13
XP6501
I
R52 22k
R60
470
Q12 2SB1132
5.1V
FI3 CFWM450G
5.0V
R48 1.5k
1.8V
D13
DAN202U
Q9
DTC114EU
C58
0.001
I
R41
470
O
R47
47
FI2 CFWM450E
0V
RX:APPROX.
+3VdBm 2.5µ( L)
C309
47p
R17 100k
R8V
5V
C67 47P
R55 4.7k
T8V
1.8V
Q15
DTC114EU
13.6V
TX:7.9V
RX:0V
TX:8.5V
RX:0V
D14
1SS302
R54
4.7k
I
C73
0.1
G
C75
10
C76
0.1
O
C74
220
R59
10k
8V
7.9V
D28
RD20E
C82 0.01
IC2 TA7808F
C83 0.1
C84 470
DC
CABLE
D16 DSA3A1
EP3
GND
Q8
2SD1664
13.6V
HV
C68 10
Q14
2SJ377
EP3
VCC
R56
4.7k
W6
Note
P -L :PMR L-band
P -ML:PMR ML-band
P -ML:PMR MH-band
L
L
L
L
-L :LMR L-band
-ML:LMR ML-band
-MH:LMR MH-band
-H :LMR H-band
NOTE: All 7640 Models are the LMR (U.S.A.) type.
C237
1
MEASUREMENT CONDITIONS
DIGITAL MULTIMETER
INTERNAL RESISTANCE:50kΩ/V
IC-F420(LMR):f=460.1MHz,TX POWER=35W
IC-F410(PMR):f=455.1MHz,TX POWER=25W
VOLTAGES INDICATED WITH(*)MARK ARE
CHANGED WITH THE FREGUENCY AND POWER.
UHF (7640) MAIN BOARD SCHEMATIC
to
Optional
OPC-617
DS1
UP
V-UP
2
2
DS6
DS7
DS5
DS4
DS10
DS3
DS2
1
DS8
DN
V-DN
8
J1
1
7
2 - Clone
4 - PTT
5 - MIC
7 - Hanger
J1 (To Microphone)
R60
P1
P0
P3
P2
DS9
PWR
1 - 8V
3 - AFO
5 - MICE
7 - GND
DS1
VHF/UHF FRONT UNIT BOARD TOP VIEW
R51
C3
R53
C1
R31
2
J2
C71
C59
C57
C52
C35
R41
C58
C24
C23
J2 (To Main Unit)
1 - GND
3 - LVIN
5 - SO
7 - SCK
9 - SO
11 - DIMIN
13 - EXPTT
15 - PWON
17 - DET
19 - PTTIN
21 - PTT
23 - OVP1
25 - OPV2
27 - OPV3
29 - OPT1
31 - OPT2
33 - OPT3
35 - SI
37 - AFO
39 - 5V
2 - MIC
4 - TEMP
6 - VIN
8 - PLST
10 - DAST
12 - EXST
14 - EXEN
16 - UNLK
18 - NOIS
20 - RFATT
22 - DTCS
24 - BEEP
26 - TONE
28 - BEEPOUT
30 - BUSY
32 - OPCS
34 - OPINT
36 - GND
38 - CPU5V
40 - 8V
VHF/UHF FRONT UNIT BOARD BOTTOM VIEW
November 1998
Part No. 001-7600-001
8-10
C33
R50
R49
R39
R40
D6
Q10
R36
R37
C42
C56
C25
C49
R71
R42
C82
C48
C50
R70
C60
R68
Q7
C46
C22
C45
C43
R56
R34
R33
R35
C41
R38
C40
R32
C44
L1
R22
R58
C34
C32
R21
C47
R69
C30
D4
D3
C29
R29
+
+
R20
C4
Q5
D2
C70
1
R17
R46
C63
C64
C67
39
40
C39
Q3
C5
R67
R48
Q6
R66
R54
R65
R18
C72
C55
50
C53
C78
C80
51
26
R19
R44
R45
C14
C66
C65
R62
R63
C21
C79
R64
25
C61
C54
C69
C11
W1
R55
C62
C26
C37
Q4
R30
C7
C77
C28
R59
+
+
C9
C8
C6
R16
C73
R25
R57
C38
R24
C16
R61
C12
C27
IC1
R27
R28
R47
R12
R3
R26
C36
R43
R8
C18
R6
L3
X1
C20
D5
D1
R14
W2
R5
IC3
R4
R15
C10
75
1
C17
R2
R7
C19
C13
C14
Q1
+
+
C15
76
R11
IC2
R1
100
R52
C2
DS1
LD-HU10140J
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
COM1
COM2
COM3
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
HANG
CTDA2
CTDA1
CTDA0
BM
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
R67
100k
8V
CPU5V
OPINT
OPCS
BUSY
BEEPOUT
TONE
BEEP
DICSIN
RFATT
NOIS
UNLK
EXEN
EXST
DAST
PLST
VIN
TEMP
MIC
R45
EXB-V8V
(1kx4)
R61
C21
0.01
5.0V
47p
47p
47p
47p
47p
47k
47p
47p
47p
47p
47p
47p
47p
47p
C46
C47
C48
C49
C50
R70
C52
C56
C57
C58
C59
C60
C61
C62
C12
0.01
5.0V
to
MAIN UNIT
J1
CONNECT
WITH W3
AFO
SI
OPT3
OPT2
OPT1
OPV3
OPV2
OPV1
PTT
PTTIN
DET
PWON
EXPTT
DIMIN
SO
SCK
SD
LVIN
DTMF
MTONE
0mV
-27.5mV
-70mV
C45
0.01
R41
270k
C44
0.01
Q7
2SC4081
C82
0.1
R49
100
R40
100k
R42
330k
R56
5.6k
R35
10k
70mV
0mV
5V
R39
100k
DTCSIN
TONE
R32
22k
C42
0.1
Q6
2SC4081
R38
47k
CTDA2
R37
12k
C43
0.01
4
Q5
XP4601
CTDA1
C41
0.033
5
R36
12k
R34
27k
C40
0.047
2
R31
10k
R33
68k
27.5mV
R50
100k
R60
RV-150
(10KB)
R68
47k
C69
0.001
C67
0.001
BEEP IS SET
BEEP
BEEPOUT
DET
R28
1k
R25
56k
2
6
3
C36
0.01
C35
0.001
C34
47p
C33
0.001
D4
DA204U
1
R30
10k
C39
0.1
D3
DA204U
HANG
R29
1k
CTDA0
MIC
R20 1k
R26
3.9k
R24
180k
100k
C38
0.022
PTTIN
C37
10
R27
39k
39
37
35
33
31
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
5V
CTCIN
CLOUT
CLIN
R57
15k
D2
DA204U
J2
7.6V
PTT
OPT1
OPT2
OPT3
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
47p
R44
EXB-V8V
(1kx4)
C63
C64
C65
C66
C70
C71
C73
C74
C77
C78
C79
C80
R65
100k
W1
0.4V
CLIN
CLOUT
POSW
R64
R63
R62
R55
100k
SCK
SI
SO
2.3V
1.4V
Q4
DTC144TU
R69
TX:5.0V
RX:0.2V
C32
0.001
2.3V
1.7V
W2
CLON
AFO
C30
470p
3.2V
4.2V
3.9V
1k
1k
1k
6.8MHz
C20
20p
D5
MA77
R5
12k
R7
1M
C19
5p
R16
2.2k
DS11 DS10
C17
0.001
R15
2.2k
DS9 DS8
C16
0.001
R14
390
DS5 DS7 DS6
C18
47p
R6
12k
HANG
R12
390
DS4 DS3 DS2
0.7V
DTCS
R8
10
L3
47µ
4.0V
2.35V
4.9V
R58
47k
L1 1µ
5.0V
CTCSS
5V
DS2 ~ DS11
SML-311YTx10
C29
0.001
to
MIC
X1
CR-590
DIM
R22
10
R21
1k
R54 1k
DIMIN
EXPTT
PWON
UNLK
COM1
COM2
COM3
RFATT
C13
0.001
Q1
2SC4081
R43
12k
1
J1
8V
CLONE
AFO
PTT
MICE
MIC
GND
HANGER
DIM
IC3
25LC160T-I/SN
1
8
CS VCC
2
7
SO HOLD
3
6
WP SCK
4
5
VSS
SI
100k
R4
100k
C15
0.001
5
AFO
MIC
HANG
PTTIN
R11
820
LIGHT ON :7.5V
LIGHT OFF:5.5V
D6
MA8051
R48
EXB-V8V
(1kx4)
5.0V
C14
0.47
R3
220k
KS1
4
EXEN
EXST
DAST
PLST
OPCS
BUSY
OPINT
NOIS
CSHIFT
Q3
DTA143ZU
R46
EXB-V8V
(1kx4)
R66
100k
P97/SEG40
P96/SEG39
P95/SEG38
P94/SEG37
P93/SEG36
P92/SEG35
P91/SEG34
P90/SEG33
P87/SEG32
P86/SEG31
P85/SEG30
P84/SEG29
P83/SEG28
P82/SEG27
P81/SEG26
P80/SEG25
P77/SEG24
P76/SEG23
P75/SEG22
P74/SEG21
P73/SEG20
P72/SEG19
P71/SEG18
P70/SEG17
P67/SEG16
PB0/AN0
AVSS
TEST
X2
X1
VSS
OSC1
OSC2
RES
NMI
P20/IRQ4/AOTRG
P21/SCK1
P22/SI1
P23/SO1
P24/SCK3
P25/RXD
P26/TXD
P27/IRQ0
P17/IRQ3/TMIF
P16/IRQ2
P15/IRQ1
P14
P13/TMIG
P12/TMOFH
P11/TMOFL
IC1
HD6433875A63H
KR0
KR1
KR2
KR3
KS0
KS1
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
P66/SEG15
P65/SEG14
P64/SEG13
P63/SEG12
P62/SEG11
P61/SEG10
P60/SEG9
P57/WKP7/SEG8
P56/WKP6/SEG7
P55/WKP5/SEG6
P54/WKP4/SEG5
P53/WKP3/SEG4
P52/WKP2/SEG3
P51/WKP1/SEG2
P50/WKP0/SEG1
PA0/COM1
PA1/COM2
PA2/COM3
PA3/COM4
VCC
V1
V2
V3
VSS
P10/TMOW
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
C11
0.001
C9
10
C10
0.01
C7
0.01
C8
0.01
C5
0.01
C6
0.01
C3
0.01
C1
0.01
3 2 1
P3
R47
EXB-V8V
(1kX4)
D1
MA111
C24
47p
C23
47p
P2
C25
47p
P1
1k
1k
1k
VCC
PDO/SEG41
PD1/SEG42
PD2/SEG43
PD3/SEG44
PD4/SEG45
PD5/SEG46
PD6/SEG47
PD7/SEG48
PE0/SEG49/M
PE1/SEG50/D0
PE2/SEG51/CL2
PE3/SEG52/CL1
AVCC
TONEM
TONED
VTREF
AVREF
PB7/AN7
PB6/AN6
PB5/AN5
PB4/AN4
PB3/AN3
PB2/AN2
PB1/AN1
KS0
S9
R19
470
MEASUREMENT CONDITIONS
DIGITAL MULTIMETER:50kΩ/VDC
OSCILLOSCOPE
:20MHz
5.0V
IC2
S-80742SL-A6
R1
10k
S8
R18
470
KR0
KR1
KR2
KR3
R2
100k
S7
P0
∆
∆
POSW
NC
S6
S5
R53
R52
R51
VSS
VDD
OUT
∆
∆
C22
47p
S4
OPV3
OPV2
OPV1
CTCIN
SD
LVIN
TEMP
VIN
C27
47p
S3
C26
47p
S2
R17
EXB-V8V
(1kx4)
MTONE
DTMF
NC
PWR
C28
0.001
S1
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
C2
0.01
R59
1k
FRONT UNIT
C4
0.01
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
COM0
COM1
COM2
Q10
DTC144TU
3.3V
BM
1.9V
0.5V
8-11
November 1998
Part No. 001-7600-001
VHF/UHF FRONT UNIT SCHEMATIC
UHF (7640) Transistor Basing Diagrams
UHF (7640) Diode Basing Diagrams
• TRANSISTORS AND FET'S
2SB1132 R
(Symbol: BARB)
• DIODES
2SB1143 S
2SC4081 R
(Symbol: BR)
2SC4215 O
(Symbol: QO)
2SC4703 SE
(Symbol: SE)
1SS302
(Symbol: C3)
1SS352
(Symbol: C1)
1T365
(Symbol: pink line)N)
DA221
(Symbol: K)
DAN202U
(Symbol: N)
2SD1664 Q
(Symbol: DA)
2SJ144 GR
(Symbol: VG)
2SJ377
(Symbol: 4L)
DAN204U
(Symbol: K)
HVU350
(Symbol: 4)
MA77
(Symbol: 4B)
MA111
(Symbol: 1B)
MA713
(Symbol: MIN)
B
E C
2SC5107 O
(Symbol: MF)
2SC5110 O
(Symbol: MGO)
D
G
D
S
S
G
D
G
S
2SK241 R (TX)
D
2SK272
(Symbol: K)
G2
D
2SK536
(Symbol: BJ)
G2
2SK880 GR
(Symbol: XG)
G1
S
DTA144EU
(Symbol: 16)
DTC114EU
(Symbol: 24)
XP4601
(Symbol: 5C)
XP6501
(Symbol: 5N)
G1
D
DTC144EU
(Symbol: 26)
MA8051 M (TX)
(Symbol: 5-1)
S
G
S
S
DTA143ZU
(Symbol: 113)
G
D
DTC144TU
(Symbol: 06)
DTC363EK
(Symbol: H27)
November 1998
Part No. 001-7600-001
8-12