Table Of Contents - Icom IC-281H Service Manual

Table of Contents

Repair Notes2
Table Of Contents3
Specifications4
Main Unit View5
Circuit Description6
Receiver Circuits6
Antenna Switching Circuit (Main Unit)6
Rf And 1St Mixer Circuits/Af Circuit (Main Unit)6
Transmitter Circuits7
Squelch Circuit (Main And Logic Units)7
Microphone Amplifier (Logic Unit)7
Modulation Circuit - Vco-A Board7
Pll Circuits8
Power Supply Circuits8
Voltage Lines8
Port Allocation9
Cpu - Logic Unit Ic69
Adjustment Procedures10
Pll Adjustment10
Receiver Adjustment10
Transmitter Adjustment10
Parts List12
Mechanical Parts And Disassembly20
Chassis Parts20
Accessories20
Exploded View21
Board Layouts23
Logic Unit Pc Boards23
Main Unit Pc Boards25
Optional Units29
Ut-66 Voice Synthesizer Unit Diagram And Pc Board29
Ut-85 Tone Squelch Unit Diagram And Pc Boards30
Block Diagram31
Voltage Diagrams33
Logic Unit Voltage Diagram33
Main Unit Voltage Diagram37