Icom IC-737 Manuals

Icom IC-737 Manuals

Manuals and User Guides for Icom IC-737. We have 2 Icom IC-737 manuals available for free PDF download: Service Manual, Instruction Manual

Icom IC-737 Instruction Manual

Icom IC-737 Instruction Manual (65 pages)

Brand: Icom | Category: Transceiver | Size: 6.61 MB

Table of Contents

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Icom IC-737 Service Manual

Icom IC-737 Service Manual (102 pages)

Brand: Icom | Category: Transceiver | Size: 24.63 MB

Table of Contents

Repair Notes
2
Table of Contents
3
Specifications
4
Disassembly
5
Connector Locations
7
Inside Views
8
Circuit Description
10
Receiver Circuits
10
RF Switching Circuit (ANT-SW and Main Circuits)
10
RF Bandpass Filter Circuit (Main Unit)
10
1St if Circuit (Main Unit)
11
2Nd Mixer Circuit (Main Unit)
11
Noise Blander Circuit (Main Unit)
11
2Nd if Circuit (Main Unit)
11
3Rd Mixer and 3Rd if Circuits (Main Unit)
12
BFO Circuit (Main Unit)
12
PBT Circuit (Main Unit)
12
SSB/CW Demodulator Circuits (Main Unit)
13
AM Demodulator Circuits (Main Unit)
13
FM Demodulator Circuit (FMAM Unit)
13
AGC Circuit (Main Unit)
13
Transmitter Circuits
14
Squelch Circuit (Main Unit)
14
Microphone Amplifier Circuit (MIC Amp Board and AF Unit)
14
AF Notch Circuit (Notch Board)
14
Balanced Modulator (Main Unit)
15
FM and am Modulation Circuits (FMAM Unit)
15
CW Keying Circuit (Main Unit)
15
IF Amplifier (Main Unit)
15
RF Circuit (Main and PA Units)
16
Low-Pass Filter Circuit (Filter Unit)
16
ALC Circuit (Main Unit)
16
APC Circuit (Main Unit)
16
PLL Circuits
17
Temperature Protection Circuit (PA Unit)
17
RF Meter Circuit (Main Unit)
17
Logic Circuits
18
1St lo PLL Circuit (PLL Unit and DDS Board)
18
Main Loop Circuit (PLL Unit)
18
Band Selection Data (PLL Unit)
18
Key Matrix
19
CPU (Logic Unit)
19
I/O Interface Port Allocations
19
Antenna Tuner Circuits
20
Matching Circuit (Tune Unit)
20
Detector Circuit (CTRL Unit)
20
Motor Control Circuit (CTRL Unit)
20
Regulator Circuits
21
Antenna Tuner CPU Port Allocations
21
Adjustment Procedures
22
Preparation before Servicing
22
Required Test Equipment
22
Connection
22
PLL Adjustment
23
Receiver Adjustment
25
Transmitter Adjustment
29
Antenna Tuner Adjustment
34
Parts List
35
Mechanical Parts
59
Exploded Drawings
60
Board Layouts
65
Block Diagram
81
Voltage Diagram
84

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