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4.0 Block Diagrams.................................................................................................... 7-9

4.1 Complete ........................................................................................................ 7-9

4.2 Controller...................................................................................................... 7-10

4.3 VCO.............................................................................................................. 7-10

4.4 Transmitter ................................................................................................... 7-11

4.5 Receiver ....................................................................................................... 7-11

5.0 Circuit Board/Schematic Diagrams and Parts List............................................. 7-13

Controller Board .................................................................................................. 7-13

VHF 136-174 MHz Main Board Top Side............................................................. 7-14

VHF 136-174 MHz Main Board Bottom Side........................................................ 7-15

Complete Controller Board Schematic Diagram .................................................. 7-16

VHF 136-174 MHz RF Board Schematic Diagram............................................... 7-17

VHF 136-174 MHz Radio Parts List (Controller Board)........................................ 7-18

6.0 Troubleshooting charts ...................................................................................... 7-27

Troubleshooting Flow Chart for Receiver............................................................. 7-27

Troubleshooting Flow Chart for Transmitter......................................................... 7-28

Troubleshooting Flow Chart for Synthesizer ........................................................ 7-29

Troubleshooting Flow Chart for Microcontroller ................................................... 7-30

Troubleshooting Flow Chart for VCO ................................................................... 7-31

Glossary of Terms....................................................................................... G-1

Motorola GP2000 Service Manual

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