Part No.
761x VHF 764x UHF Conventional Mobile
VHF 146-174MHz 45 Watts Part No.
UHF 400-430, 450-470, 490-512MHz 35 Watts
761x VHF 764x UHF CONVENTIONAL FM TWO-WAYRADIO
VHF 146-174MHz 45 Watts
UHF 400-430, 450-470, 470-490,or 490-512MHz
35 Watts
3 OPERATION
TABLE OF CONTENTS
2 INSTALLATION AND DISASSEMBLY
1 GENERAL INFORMATION
5A VHF 7610 CIRCUIT DESCRIPTION
TABLE OF CONTENTS CONT’D
6 ADJUSTMENT PROCEDURE
7 PARTS LIST
TABLE OF CONTENTS CONT’D
8SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS
LIST OF TABLES
LIST OF FIGURES
SECTION 1 GENERAL INFORMATION
1.3 PRODUCT WARRANTY
1.6 ACCESSORIES
1.7 FACTORY CUSTOMER SERVICE
Toll-Free:800
Table 1-175xx Accessories
1.8 FACTORY RETURNS
Accessory
1.10 INTERNET HOME PAGE
1.9 REPLACEMENT PARTS
November
This page intentionally left blank
Part No.
GENERAL
7610 VHF AND 7640 UHF MOBILE SPECIFICATIONS
November
NOTES
2.1 GENERAL
SECTION 2 INSTALLATION AND DISASSEMBLY
Figure 2-1Installation Components
2.2 TRANSCEIVER INSTALLATION
2.3 POWER CABLE INSTALLATION
Figure 2-2Mounting Bracket Installation
2.2.2 INSTALLING MOUNTING BRACKET
2.2.3 INSTALLING MICROPHONE HANGER
DB-9Pin
Changing 20-AmperePower Cable Fuses
2.4 USING AN EXTERNAL SPEAKER
2.5 ACCESSORY CABLE INSTALLATION
Figure 2-6Removing PC Board
2.6 TRANSCEIVER DISASSEMBLY
Figure 2-5PC Board Screws
Figure 2-4Cover and Front Panel Removal
Figure 2-7 2/5-ToneModule Installation
2.7 2-TONE/5-TONEMODULE INSTALLATION
Setting 5-ToneDeviation
25 kHz Channel Spacing - ±3.5 kHz
SECTION 3 OPERATION
3.1 FEATURES
Figure 3-17600 Front Panel
3.3 BASIC OPERATION
3.2 CONTROLS AND DISPLAY
Direct Selection - The F1-F4and
3.4 RECEIVING AND PLACING CALLS
Key Label
3.5 PROGRAMMABLE FUNCTIONS
Table 3-1Option Key Programmable Functions
Function
1.Press the TONE key and “TON--x”is displayed
3.6 CHANNEL SCAN
November
3.6.3 PRIORITY CHANNEL SAMPLING
Part No.
4.1 GENERAL
Figure 4-1Programming Setup
SECTION
PROGRAMMING
4.3 SPECIAL KEYS AND FUNCTIONS
4.2STARTING THE PROGRAM
4.4 MENU FLOW
Current - Prints the currently displayed data
Bank Select
4.4.7 SETUP MENU
Parameter
Description
Parameter
Lockout
Auto Reset
Parameter
RF PWR
Parameter
Description
Label
Label
Description
Parameter
Parameter
Table 4-3DTMF Autodial Screen Description
Parameter
Part No.
Table 4-4Continuous Tone Screen Description
Table 4-5Scan Function Screen Description
November
Parameter
Table 4-6 2-ToneCode Channel Screen Description
Description
Parameter
Beep
Parameter
Table 4-7Common Screen Description
Table 4-8Expert Screen Description
Table 4-7Common Screen Description Continued
Parameter
4.5 UNIQUE PMR EUROPEAN SCREENS
Table 4-8Expert Screen Description Continued
Description
PROGRAMMING
Part No.
Figure 4-2Memory Channel Screen PMR Models
November
4-17
4-18
This page intentionally left blank
November
Part No.
5.1 VHF RECEIVER CIRCUIT
SECTION 5A VHF 7610 CIRCUIT DESCRIPTION
Figure 5-1Second IF System IC3 VHF
5.2 VHF TRANSMITTER CIRCUIT
5.3.1 PLL CIRCUIT
Figure 5-3PLL Circuit VHF
5.2.5 APC CIRCUIT
5.3 VHF PLL CIRCUIT
Port
5.4 VHF IC PIN DESCRIPTIONS
Line
Description
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
November
5.7.3 UHF POWER SUPPLY
5.7.2 VCO CIRCUIT
5.7.4 UHF CPU IC1 PORT ALLOCATION
Part No.
5.7.5 UHF I/O EXPANDER IC12 MAIN UNIT
5.7.6 UHF PORT EXPANDER IC13 MAIN UNIT
November
6.1 GENERAL
SECTION 6 ADJUSTMENT PROCEDURE
Test Setup
Figure
6.1.3 TEST CABLE
Figure 6-3Test Cable Schematic
Figure 6-2Screen Display Example
6.1.2 TEST CHANNELS
Table 6-2UHF Test Frequencies
Table 6-1VHF Test Frequencies
ADJUST /X /Y
6.3 PLL ADJUSTMENT VHF MODELS
VHF ADJUSTMENTS
VHF ADJUSTMENTS
6.2 PRELIMINARY SETUP
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
6.6 PLL ADJUSTMENT UHF MODELS
UHF ADJUSTMENTS
6.7TRANSMITTER ADJUSTMENTS UHF MODELS
Figure 6-6UHF Adjustment Points
UHF ADJUSTMENTS CONT’D
6.7.4 DTCS WAVEFORM ADJUST
UHF ADJUSTMENTS CONT’D
6.8 RECEIVER ADJUSTMENTS UHF MODELS
HVFULSWLRQ
SECTION 7 PARTS LIST
æçìíýõ9+ôý0$,1ý81,7
7610 VHF Main Unit
November
76105 VHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
November
7610 VHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
November Part No.
7610 VHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
November
7610 VHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
November
7610 VHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
November
7610 VHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
HVFULSWLRQ
æçéíýõ8+ôý0$,1ý81,7
7640 UHF Main Unit
7610 VHF Main Unit
November
7640 UHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
November
7640 UHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
November
7640 UHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
HVFULSWLRQ
5HIý1Rï
7640 UHF Main Unit
HVFULSWLRQ
November
7640 UHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
November Part No.
7640 UHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
November
7640 UHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
November Part No.
7640 UHF Main Unit
HVFULSWLRQ
HVFULSWLRQ
7-17
7640 UHF Main Unit
HVFULSWLRQ
November
5HIý1Rï
5217ý81,7 õ9+ý$1ý8+ý02/6ô
Front Unit All Models
7640 UHF Main Unit
November
Front Unit All Models
HVFULSWLRQ
HVFULSWLRQ
Front Unit All Models
æçìíýõ9+ôý&+$66,6ý3$576
æçéíýõ8+ôý&+$66,6ý3$576
Chassis Parts
Part No.
VHF 7610 EXPLODED VIEW
7-21
November
UHF 7640 EXPLODED VIEW
←FOLDOUT VHF Exploded View
MAIN UNIT
VHF 7610 BLOCK DIAGRAM
FRONT UNIT
VHF 7610 Diode Basing Diagrams
VHF 7610 Transistor Basing Diagrams
VHF 7610 MAIN BOARD BOTTOM VIEW
FOLDOUT →
November
VHF 7610 MAIN BOARD TOP VIEW
Part No.
VHF MAIN UNIT
VHF 7610 MAIN BOARD SCHEMATIC
November
UHF 7640 BLOCK DIAGRAM
Part No.
UHF 7640 MAIN BOARD BOTTOM VIEW
FOLDOUT →
November
J5 T o O p t Ca ble
UHF 7640 MAIN BOARD TOP VIEW
J4 T o O p tion al Un it
J2 T o S p kr
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
• DIODES
UHF 7640 Transistor Basing Diagrams
UHF 7640 Diode Basing Diagrams
TRANSISTORS AND FETS