Icom IC-R71 Manuals

Manuals and User Guides for Icom IC-R71. We have 1 Icom IC-R71 manual available for free PDF download: Service Manual

Icom IC-R71 Service Manual (102 pages)

Brand: Icom | Category: Receiver | Size: 4 MB

Table of Contents
2
Specifications
3
Controls and Their Functions
4
Front Panel
4
Rear Panel
7
Inside Views
8
Main Unit
8
RF Unit
8
Bottom View
9
PLL Unit
9
Block Diagram
10
Rf/Main Unit
10
Pll/Logic Unit
11
Operation
12
RF Circuits
12
1St if Circuits
13
2Nd -4Th if Circuits
13
AF Circuits
13
Other Circuits
13
During SSB/CW/RTTY
14
During am
14
Filter Select Circuit
14
IC3 Input/Output Relationships by Mode
14
Filter Table
15
AGC Circuit
15
S-Meter Circuit and Squelch Circuit
15
BFO Circuit
15
Reference Oscillation Circuit
16
2Nd Local-Oscillation Circuit
16
Main Loop
17
PLL Ics
17
Loop Filter and Muting Circuit
17
VCO Circuit
17
Sub Loop
18
Loop System
18
Local Oscillator Circuit
18
PLL Data
19
Logic Unit
20
Cpu
20
CPU Input Control Circuit
20
Multi-Function Custom IC
20
I/O Expander Circuit
21
Display Timing
21
N Data
21
Display Data Timing
21
N Data Output Timing
22
High and Low N Data
22
Scan Circuit
23
Matrix Unit
23
Matrix Table
23
Display Unit
25
REG Unit
25
Remote-Control Reception Circuitry
26
Transmission Output Waveform
26
IC1 Output Waveform
26
Disassembly
27
Front Panel Parts
29
Connector Connections
31
Rear Panel Parts
36
Adjustments
37
PLL Adjustment Guide
37
Receiver Adjustment Guide
39
FM Unit Adjustment Guide
41
Main Unit Circuit and Voltage Diagram
42
RF Unit Circuit and Voltage Diagram
44
PLL Unit Circuit and Voltage Diagram
46
PLL Sub Loop Unit Circuit and Voltage Diagram
48
Logic Unit Circuit Diagram
49
Matrix Unit Circuit and Voltage Diagram
51
Front Unit Circuit Diagram
53
Display Unit Circuit and Voltage Diagram
54
Ten Key Unit Circuit Diagram
55
EF Unit Circuit Diagram
56
REG Unit Circuit and Voltage Diagram
57
IC Ratings
58
Double Balanced Modulator
58
Audio Power Amplifier
58
PIN Connection
58
Pre AMP for Remote Control
59
Programmable Display Controlled
59
Maximum Ratings
59
Dual D-Type Flip Flop
60
Single 8-Channel Multiplexer/Demultiplexer
60
Binary Up/Down Counter
61
Dual Monostable Maltivibrator
61
Quadruple 2-Input Positive Nor/And/Or Gate
61
Triple 2-Input Positive or Gate
61
Decode Counter
62
Quadruple D-Type Flip Flop with Reset
62
Octal Positive Edge-Triggered D-Type Flip Flop with Enable
62
Input/Output Expander
63
1/20, 1/100 High Speed Divider
64
Dual Low Noise Amp
64
Dual Attenuator
64
Parts List
65
Schematic Diagram
85
Front Unit
94
Display Board
94
Ten Key Board
95
SW1/SW2/SW3 Board
95
PBT Board
95
Regulator Unit
100
FM Unit
100
RAM Unit
100
Unit Layout
101

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Icom IC-R71 Service Manual (102 pages)

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