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