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IC-R71
Service manual
Icom IC-R71 Service Manual
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Contents
Table of Contents
Bookmarks
Table of Contents
Table of Contents
Specifications
Controls and Their Functions
Front Panel
Rear Panel
Inside Views
Main Unit
RF Unit
Bottom View
PLL Unit
Block Diagram
Rf/Main Unit
Pll/Logic Unit
Operation
RF Circuits
1St if Circuits
2Nd -4Th if Circuits
AF Circuits
Other Circuits
During SSB/CW/RTTY
During am
Filter Select Circuit
IC3 Input/Output Relationships by Mode
Filter Table
AGC Circuit
S-Meter Circuit and Squelch Circuit
BFO Circuit
Reference Oscillation Circuit
2Nd Local-Oscillation Circuit
Main Loop
PLL Ics
Loop Filter and Muting Circuit
VCO Circuit
Sub Loop
Loop System
Local Oscillator Circuit
PLL Data
Logic Unit
Cpu
CPU Input Control Circuit
Multi-Function Custom IC
I/O Expander Circuit
Display Timing
N Data
Display Data Timing
N Data Output Timing
High and Low N Data
Scan Circuit
Matrix Unit
Matrix Table
Display Unit
REG Unit
Remote-Control Reception Circuitry
Transmission Output Waveform
IC1 Output Waveform
Disassembly
Front Panel Parts
Connector Connections
Rear Panel Parts
Adjustments
PLL Adjustment Guide
Receiver Adjustment Guide
FM Unit Adjustment Guide
Main Unit Circuit and Voltage Diagram
RF Unit Circuit and Voltage Diagram
PLL Unit Circuit and Voltage Diagram
PLL Sub Loop Unit Circuit and Voltage Diagram
Logic Unit Circuit Diagram
Matrix Unit Circuit and Voltage Diagram
Front Unit Circuit Diagram
Display Unit Circuit and Voltage Diagram
Ten Key Unit Circuit Diagram
EF Unit Circuit Diagram
REG Unit Circuit and Voltage Diagram
IC Ratings
Double Balanced Modulator
Audio Power Amplifier
PIN Connection
Pre AMP for Remote Control
Programmable Display Controlled
Maximum Ratings
Dual D-Type Flip Flop
Single 8-Channel Multiplexer/Demultiplexer
Binary Up/Down Counter
Dual Monostable Maltivibrator
Quadruple 2-Input Positive Nor/And/Or Gate
Triple 2-Input Positive or Gate
Decode Counter
Quadruple D-Type Flip Flop with Reset
Octal Positive Edge-Triggered D-Type Flip Flop with Enable
Input/Output Expander
1/20, 1/100 High Speed Divider
Dual Low Noise Amp
Dual Attenuator
Parts List
Schematic Diagram
Front Unit
Display Board
Ten Key Board
SW1/SW2/SW3 Board
PBT Board
Regulator Unit
FM Unit
RAM Unit
Unit Layout
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