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IC-47A
User Manuals: Icom IC-47A UHF Transceiver
Manuals and User Guides for Icom IC-47A UHF Transceiver. We have
2
Icom IC-47A UHF Transceiver manuals available for free PDF download: Maintenance Manual, Instruction Manual
Icom IC-47A Maintenance Manual (81 pages)
430MHz
Brand:
Icom
| Category:
Transceiver
| Size: 2 MB
Table of Contents
Table of Contents
2
Specifications
3
Operating Controls
4
Front Panel
4
Vfo/Memory Switch
4
VFO Switch
4
Rear Panel
6
Under the Access Cover
7
Circuit Description
8
Receiver Circuits
8
Transmitter Circuits
8
RF Amplifier and First Mixer
8
Voltage Regulation and Receive-Transmit Switch Circuit
9
ALC and RF Power Meter Circuits
9
PLL Circuit
9
PLL Circuit Block Diagram
9
Local Oscillator Circuit
10
Mixer, Low-Pass Filter and Amplifier Circuits
10
PLL Local Oscillator
10
Logic Circuits
12
VCO and FM Modulation Circuits
12
Cpu
12
CPU Control Circuit
12
Clock Pulse Generator Circuit
16
MIC Up/Down Control Circuit
16
Scanning Control Circuit
16
Priority Circuit
17
PTT Circuit
17
Tone Generator Circuit
17
Voltage Regulator and Memory Backup Circuits
17
Block Diagram
18
Inside Views
20
Main Unit Side
20
Logic Unit Side
21
Mechanical Parts and Disassembly
22
Frame Disassembly
22
Front Panel Disassembly
24
Connector Connections
26
Bottom View
27
Maintenance and Adjustment
28
Preparation before Servicing
28
PLL Adjustment
29
PLL/VCO Unit
30
Receiver Adjustment
31
Main/Pll Unit
32
Transmitter Adjustment
33
Voltage Diagrams
35
EF Unit
35
Logic Unit
43
PA Unit
47
Board Layouts
48
RF, Main & PLL Units
49
IC Specifications
54
LED Level Meter Indicator
55
PIN Connection
55
Dual Audio Amplifier
55
Dual Comparator
56
Narrow Band FM if
56
FM if Amplifier
57
3-Output 8.2 V Voltage Regulator
57
5.4W Audio Power Amplifier
58
Dual Operational Amplifier
58
Programmable Phase Locked Loop
60
5-Unit 400Ma Darlington Transistor Array
60
I/O Expander
61
Programmable Tone Generator
62
Diode Array
62
25W UHF RF Power Amplifier
63
Parts List
64
UT-16 Voice Synthesizer Unit
73
Operation after Installation
73
Timing Chart of IC 2
74
Schematic
77
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Icom IC-47A Instruction Manual (30 pages)
430 MHz FM Transceiver
Brand:
Icom
| Category:
Transceiver
| Size: 3 MB
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