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IC-A3E
Icom IC-A3E Service Manual
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DE
UP
DOWN
LOK
TRC
SHIFT
PTT
LOW
TMUT
GND
SPE
9
1
1
7
14
8
DIAL
INTSP
HV
HV
VCC
VCC
GND
NA
V
SQL
BEEP
DETO
AFON
WX
ANL
GND
GND
GND
GND
+5
GND
GND
GND
INTMIC
TO LOGIC UNIT
TO SPEAKER
J5005
TO RF UNIT
J4005
CLONE
GND
GND
VCC
GND
GND
CLK
D
ATA
ENB
Add "5000" to each indicated par
t number on the unit f
or the actual par
t number
.
NO
TE:
POWER
VOL/SQL
9 - 4
9-5 MAIN UNIT
• T
OP
VIEW
30
32
Table of Contents
Default Chapter
3
Table of Contents
3
Specifications
4
Inside Views
5
Circuit Description
6
Receiver Circuits
6
Transmitter Circuits
8
Pll Circuits
8
Power Supply Circuits
9
Cpu Port Allocations
9
Adjustment Procedures
10
Pll and Transmitter Adjustments
10
Receiver Adjustment
12
Parts List
14
Vco Unit
18
Mechanical Parts and Disassembly
24
Block Diagram
26
Semiconductor Information
27
Board Layouts
28
Prt Unit
28
Vco Board
28
Rf Unit
29
Main Unit
31
Logic Unit [IC-A22/E]
33
Logic Unit [IC-A3/E]
35
Voltage Diagrams
37
Main Unit
37
RF UNIT (Inc. PRT UNIT and VCO BOARD)
38
LOGIC UNIT (Inc. PTT UNIT)
39
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Icom IC-A3E Specifications
General
Brand
Icom
Model
IC-A3E
Category
Transceiver
Language
English
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