Table Of Contents - Motorola HT Series Detailed Service Manual

Table of Contents

REVISION CHANGE: ................................................................................................................................. 1
Chapter 1 UHF Theory of Operation ............................................................................... 7
1.1 Transmitter........................................................................................................................................ 7
1.1.1 General ................................................................................................................................ 7
1.1.2 Power Amplifier.................................................................................................................... 7
1.1.3 Antenna Switch.................................................................................................................... 8
1.1.4 Harmonic Filter .................................................................................................................... 8
1.1.5 Antenna Matching Network.................................................................................................. 8
1.1.6 Power Control Integrated Circuit (PCIC).............................................................................. 8
1.2 Receiver............................................................................................................................................ 9
1.2.1 Receiver Front-End.............................................................................................................. 9
1.2.2 Receiver Back-End ............................................................................................................ 10
1.3 Frequency Generation Circuitry...................................................................................................... 10
1.4 Synthesizer ..................................................................................................................................... 11
1.5 Voltage-Controlled Oscillator (VCO)............................................................................................... 12
Chapter 2 UHF Circuit Board Layouts, Schematic Diagrams and Parts List............ 15
2.1 Notes for All Schematics and Circuit Boards .................................................................................. 15
2.2 Circuit Board/Schematic Diagrams and Parts List.......................................................................... 17
Chapter 3 UHF Troubleshooting Charts....................................................................... 31
3.1 Troubleshooting Flow Chart for Controller ...................................................................................... 31
3.2 Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) ................................................................ 32
3.3 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) ................................................................ 33
3.4 Troubleshooting Flow Chart for Transmitter ................................................................................... 34
3.5 Troubleshooting Flow Chart for Synthesizer................................................................................... 35
3.6 Troubleshooting Flow Chart for VCO.............................................................................................. 36
Chapter 4 UHF Band 2 Theory of Operation ................................................................ 37
4.1 Transmitter...................................................................................................................................... 37
4.1.1 General .............................................................................................................................. 37
4.1.2 Power Amplifier.................................................................................................................. 37
4.1.3 Antenna Switch.................................................................................................................. 38
4.1.4 Harmonic Filter .................................................................................................................. 38
4.1.5 Antenna Matching Network................................................................................................ 38
4.1.6 Power Control Integrated Circuit (PCIC)............................................................................ 38
4.2 Receiver.......................................................................................................................................... 39
4.2.1 Receiver Front-End............................................................................................................ 39
4.2.2 Receiver Back-End ............................................................................................................ 40
4.3 Frequency Generation Circuitry...................................................................................................... 40
4.4 Synthesizer ..................................................................................................................................... 41
4.5 Voltage-Controlled Oscillator (VCO)............................................................................................... 42
Chapter 5 UHF Band 2 CB Layouts, Schematic Diagrams, and Parts List ............... 45