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Transceiver
IC-47A
Maintenance manual
Icom IC-47A Maintenance Manual
430mhz
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:
Instruction manual
(30 pages)
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Table Of Contents
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Contents
Table of Contents
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Table of Contents
Table of Contents
Specifications
Operating Controls
Front Panel
Vfo/Memory Switch
VFO Switch
Rear Panel
Under the Access Cover
Circuit Description
Receiver Circuits
Transmitter Circuits
RF Amplifier and First Mixer
Voltage Regulation and Receive-Transmit Switch Circuit
ALC and RF Power Meter Circuits
PLL Circuit
PLL Circuit Block Diagram
Local Oscillator Circuit
Mixer, Low-Pass Filter and Amplifier Circuits
PLL Local Oscillator
Logic Circuits
VCO and FM Modulation Circuits
Cpu
CPU Control Circuit
Clock Pulse Generator Circuit
MIC Up/Down Control Circuit
Scanning Control Circuit
Priority Circuit
PTT Circuit
Tone Generator Circuit
Voltage Regulator and Memory Backup Circuits
Block Diagram
Inside Views
Main Unit Side
Logic Unit Side
Mechanical Parts and Disassembly
Frame Disassembly
Front Panel Disassembly
Connector Connections
Bottom View
Maintenance and Adjustment
Preparation before Servicing
PLL Adjustment
PLL/VCO Unit
Receiver Adjustment
Main/Pll Unit
Transmitter Adjustment
Voltage Diagrams
EF Unit
Logic Unit
PA Unit
Board Layouts
RF, Main & PLL Units
IC Specifications
LED Level Meter Indicator
PIN Connection
Dual Audio Amplifier
Dual Comparator
Narrow Band FM if
FM if Amplifier
3-Output 8.2 V Voltage Regulator
5.4W Audio Power Amplifier
Dual Operational Amplifier
Programmable Phase Locked Loop
5-Unit 400Ma Darlington Transistor Array
I/O Expander
Programmable Tone Generator
Diode Array
25W UHF RF Power Amplifier
Parts List
UT-16 Voice Synthesizer Unit
Operation after Installation
Timing Chart of IC 2
Schematic
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Instruction Manual
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