UHF 400-430, 450-470, 490-512MHz 35 Watts
761x VHF 764x UHF Conventional Mobile
VHF 146-174MHz 45 Watts Part No.
Part No.
35 Watts
VHF 146-174MHz 45 Watts
UHF 400-430, 450-470, 470-490,or 490-512MHz
761x VHF 764x UHF CONVENTIONAL FM TWO-WAYRADIO
1 GENERAL INFORMATION
TABLE OF CONTENTS
2 INSTALLATION AND DISASSEMBLY
3 OPERATION
7 PARTS LIST
TABLE OF CONTENTS CONT’D
6 ADJUSTMENT PROCEDURE
5A VHF 7610 CIRCUIT DESCRIPTION
LIST OF FIGURES
8SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS
LIST OF TABLES
TABLE OF CONTENTS CONT’D
1.7 FACTORY CUSTOMER SERVICE
1.3 PRODUCT WARRANTY
1.6 ACCESSORIES
SECTION 1 GENERAL INFORMATION
Accessory
Table 1-175xx Accessories
1.8 FACTORY RETURNS
Toll-Free:800
1.9 REPLACEMENT PARTS
1.10 INTERNET HOME PAGE
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Part No.
7610 VHF AND 7640 UHF MOBILE SPECIFICATIONS
GENERAL
NOTES
November
2.2 TRANSCEIVER INSTALLATION
SECTION 2 INSTALLATION AND DISASSEMBLY
Figure 2-1Installation Components
2.1 GENERAL
2.2.3 INSTALLING MICROPHONE HANGER
Figure 2-2Mounting Bracket Installation
2.2.2 INSTALLING MOUNTING BRACKET
2.3 POWER CABLE INSTALLATION
2.5 ACCESSORY CABLE INSTALLATION
Changing 20-AmperePower Cable Fuses
2.4 USING AN EXTERNAL SPEAKER
DB-9Pin
Figure 2-4Cover and Front Panel Removal
2.6 TRANSCEIVER DISASSEMBLY
Figure 2-5PC Board Screws
Figure 2-6Removing PC Board
2.7 2-TONE/5-TONEMODULE INSTALLATION
Figure 2-7 2/5-ToneModule Installation
Setting 5-ToneDeviation
25 kHz Channel Spacing - ±3.5 kHz
3.1 FEATURES
SECTION 3 OPERATION
Figure 3-17600 Front Panel
3.2 CONTROLS AND DISPLAY
3.3 BASIC OPERATION
Direct Selection - The F1-F4and
3.4 RECEIVING AND PLACING CALLS
Function
3.5 PROGRAMMABLE FUNCTIONS
Table 3-1Option Key Programmable Functions
Key Label
1.Press the TONE key and “TON--x”is displayed
3.6 CHANNEL SCAN
3.6.3 PRIORITY CHANNEL SAMPLING
November
Part No.
PROGRAMMING
Figure 4-1Programming Setup
SECTION
4.1 GENERAL
4.2STARTING THE PROGRAM
4.3 SPECIAL KEYS AND FUNCTIONS
4.4 MENU FLOW
Current - Prints the currently displayed data
Description
4.4.7 SETUP MENU
Parameter
Bank Select
Parameter
RF PWR
Auto Reset
Parameter
Lockout
Description
Parameter
Label
Description
Label
Parameter
Table 4-3DTMF Autodial Screen Description
Parameter
Parameter
November
Table 4-4Continuous Tone Screen Description
Table 4-5Scan Function Screen Description
Part No.
Parameter
Table 4-6 2-ToneCode Channel Screen Description
Description
Parameter
Parameter
Beep
Table 4-7Common Screen Description
Table 4-7Common Screen Description Continued
Table 4-8Expert Screen Description
Parameter
Table 4-8Expert Screen Description Continued
4.5 UNIQUE PMR EUROPEAN SCREENS
Description
PROGRAMMING
4-17
Figure 4-2Memory Channel Screen PMR Models
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Part No.
Part No.
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4-18
SECTION 5A VHF 7610 CIRCUIT DESCRIPTION
5.1 VHF RECEIVER CIRCUIT
Figure 5-1Second IF System IC3 VHF
5.2 VHF TRANSMITTER CIRCUIT
5.3 VHF PLL CIRCUIT
Figure 5-3PLL Circuit VHF
5.2.5 APC CIRCUIT
5.3.1 PLL CIRCUIT
Description
5.4 VHF IC PIN DESCRIPTIONS
Line
Port
Port
SECTION 5B UHF 7640 CIRCUIT DESCRIPTION
5.5 UHF RECEIVER CIRCUIT
Figure 5-4Second IF System IC1 UHF
5.6 UHF TRANSMITTER CIRCUIT
Figure 5-6PLL Circuit UHF
5.7 UHF PLL CIRCUIT
5.7.4 UHF CPU IC1 PORT ALLOCATION
5.7.3 UHF POWER SUPPLY
5.7.2 VCO CIRCUIT
November
November
5.7.5 UHF I/O EXPANDER IC12 MAIN UNIT
5.7.6 UHF PORT EXPANDER IC13 MAIN UNIT
Part No.
Figure
SECTION 6 ADJUSTMENT PROCEDURE
Test Setup
6.1 GENERAL
6.1.2 TEST CHANNELS
Figure 6-3Test Cable Schematic
Figure 6-2Screen Display Example
6.1.3 TEST CABLE
Table 6-1VHF Test Frequencies
Table 6-2UHF Test Frequencies
ADJUST /X /Y
6.2 PRELIMINARY SETUP
VHF ADJUSTMENTS
VHF ADJUSTMENTS
6.3 PLL ADJUSTMENT VHF MODELS
VHF ADJUSTMENTS CONT’D
Figure 6-4VHF Adjustment Points
6.5 RECEIVER ADJUSTMENTS VHF MODELS
VHF ADJUSTMENTS CONT’D
Figure 6-5Beep Tone Level Adjustment
VHF ADJUSTMENTS CONT’D
UHF ADJUSTMENTS
6.6 PLL ADJUSTMENT UHF MODELS
6.7TRANSMITTER ADJUSTMENTS UHF MODELS
UHF ADJUSTMENTS CONT’D
Figure 6-6UHF Adjustment Points
6.7.4 DTCS WAVEFORM ADJUST
6.8 RECEIVER ADJUSTMENTS UHF MODELS
UHF ADJUSTMENTS CONT’D
7610 VHF Main Unit
SECTION 7 PARTS LIST
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VHF 7610 EXPLODED VIEW
7-21
Part No.
←FOLDOUT VHF Exploded View
UHF 7640 EXPLODED VIEW
VHF 7610 BLOCK DIAGRAM
MAIN UNIT
FRONT UNIT
VHF 7610 Transistor Basing Diagrams
VHF 7610 Diode Basing Diagrams
FOLDOUT →
VHF 7610 MAIN BOARD BOTTOM VIEW
VHF 7610 MAIN BOARD TOP VIEW
November
Part No.
VHF 7610 MAIN BOARD SCHEMATIC
VHF MAIN UNIT
UHF 7640 BLOCK DIAGRAM
November
Part No.
FOLDOUT →
UHF 7640 MAIN BOARD BOTTOM VIEW
November
J2 T o S p kr
UHF 7640 MAIN BOARD TOP VIEW
J4 T o O p tion al Un it
J5 T o O p t Ca ble
UHF 7640 MAIN BOARD SCHEMATIC
VHF/UHF FRONT UNIT BOARD TOP VIEW
VHF/UHF FRONT UNIT BOARD BOTTOM VIEW
VHF/UHF FRONT UNIT SCHEMATIC
FRONT UNIT
TRANSISTORS AND FETS
UHF 7640 Transistor Basing Diagrams
UHF 7640 Diode Basing Diagrams
• DIODES
