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Manuals
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Icom Manuals
Receiver
iC- r8500
Service manual
Icom IC-R8500 Service Manual
Communications receiver
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Also See for IC-R8500
:
Service manual addendum
(286 pages)
,
Service manual
(100 pages)
,
Instruction manual
(48 pages)
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Table Of Contents
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Contents
Table of Contents
Bookmarks
Table of Contents
Repair Notes
Table of Contents
Specifications
Inside Views
Main, RF-B and MIX Units View
PLL, CONV and RF-A Units View
Disassembly and Option Installations
CR-293 High Stability Crystal Unit
Circuit Description
Receiver Circuits
RF Convertor Circuit (Conv Unit)/Rf Attenuator Circuit (Conv Unit)
VHF/UHF RF Circuit (RF-B Unit)/Tuned Notch Circuit (RF-B Unit)
VHF/UHF 1St Mixer Circuit - RF-B Unit
VHF/UHF 1St if and 2Nd Mixer
HF RF Filter Circuit - RF-A Unit
HF 1St Mixer Circuit - RF-A Unit
HF 2Nd Mixer Circuit - RF-A Unit
IF Circuit - Main Unit/3Rd Mixer Circuit - Main Unit
Demodulator Circuit - Main Unit
Squelch Control Circuit - Main Unit
Squelch Circuit - Main Unit
AF Amplifier Circuit - Main Unit
Noise Blanker Circuit - Main Unit
AGC Circuit - Main Unit
S-Meter Circuit - Main Unit/Apf Circuit - Main Unit
PLL Circuits
Center Detector and Center Indicator Circuits - Main Unit
VSC Circuit - Main Unit
1St/2Nd lo PLL Circuit - PLL Unit
Convertor PLL Circuit - Conv Unit
PLL Circuits Diagram
Power Supply Circuits
Port Allocations
Voltage Lines
CPU - Main Unit, IC33
Sub CPU (Disp Unit, IC1)
DDS ETC-LATCH (PLL Unit, IC3)
I/O Expander Ics
Meter Reference Adjustment
Power Supply Voltage and PLL Adjustment
Main Unit Diagram
PLL Unit Diagram
Receiver Adjustment
Conv and RF-A Units Diagram
Main, MIX and RF-B Units Diagram
RF-B BPF Tuned Voltage Adjustment
Noise Squelch, S-Meter and Center Indicator Adjustment
S-Meter Flat Adjustment
Parts List
Front Unit Parts List
DISP Unit Parts List
SW-A Board Parts List/Sw-B Board Parts List
VR-A Board/Vr-B Board Parts List
Jack Board Parts List
PLL Unit Parts List
VCO-A Board Parts List
VCO-B Board Parts List
Main Unit Parts List
MIX Unit Parts List
RF-A Unit Parts List
RF-B Unit Parts List
Conv Unit Parts List
Mechanical Parts
Exploded Views
Semi-Conductor Information
Transistors and Fet's
Board Layouts
Front - Boards
Disp Unit Board
SW-A Board
SW-B Board
Main Unit Board
RF-A Unit Board
RF-B Unit Board
VCO-A and VCO-B Boards
PLL Unit Board
MIX and Conv Units Board
Block Diagram
Voltage Diagram
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Quick Links
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Repair Notes
2
Pll, Conv and Rf-A Units View
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See also:
Instruction Manual
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