Icom IC-A22 Service Manual

10 - 4
VOLTAGE LINE
Explanatory notes
TX LINE
LOGIC UNIT
220k
R6127
J
A
B
C
D
G
F
E
I
H
D6115 MA111
VORS VORC
0.1
C6122
IC-A22/E ONLY
EM-140
MC6001
INTMIC
MA8051 D6014
33k R6021 0.001 C6011
XP4315
Q6108
+5
UN9213(A3/E)
UNR9213J(A22/E)
Q6110
330k
R6137
MA111
D6116
0.01
C6119
47k R6135
390k R6136
0.1 C6120
47k R6155
47k R6138 39k R6134
22 C6130 100k R6154
15k
R6144
4.7k R6163
500k
R6151
20k
R6150
0.1
C6126
0.0047
C6129
18k
R6147
10
C6131
0.1 C6126
18k R6149 180k R6148
0.1 C6125
220k R6146
220k R6145
4.7k R6164
d
cb
a
220k
R6101
0.1
C6116
0.01
C6116
0.01
C6117
150k R6129
4.7k R6161 1.8k R6130
33k R6142
4.7k
R6140
18k
R6139
3.3
C6121
470 R6156
100k R6153
4.7k R6162 0.1 C6123 220k R6143
6.8k R6126
4.7k R6160 0.1 C6115
10 C6112
1 C6113 33k R6126
56k R6125
10 C6114 4.7k R6159
PTT UNIT
J9001J6003
unit J5001
to MAIN
ENB
DATA
CLK
GND
GND
GND
VCC
CLONE
GND
INTMIC
GND
GND
GND
+5
GND
GND
GND
1718
J6001
12
GND
unit J5002
to MAIN
ANL
WX
AFON
DETO
BEEP
SQL
NAV
GND
GND
TMUT
LOW
PTT
SHIFT
TRC
LOK
DOWN
UP
DE
J6002
1718
12
(LIGHT)
S9002
(ANL)
S9003
(PTT)
S9001
PTTSW
TBPS1S333K460H5Q
R6141
1
6
2
5
3
4
8
7
NJM2904V
IC6107
a
b
1
6
2
5
3
4
8
b
a
NJM2903V
IC6108
7
NAV
2SC4211
Q6109
VORO
8
9
10
11
13
7
6
5
4
12
14
3
2
1
NJM2902V
IC6105
39k
R6131
5
6
7
8
4
3
2
1
470P C6124
220k R6133 47k R6132
a
b
NJM2903V
IC6106
DET0
VOR: 5V
RX: 0V
TX: 0V
VOR: 5V
RX: 0.55V
TX: 0.55V
VOR: 0.55V
RX: 0.1V
TX: 0.1V
VOR: 1.1V
RX: 0.35V
TX: 0.35V
VOR: 1.9V
RX: 0V
TX: 0V
(NO MODULATION)
FREQUENCY: 127.025MHz(VOR: 113.000MHz)
VOLTMETER:50kΩ/V DC
VOLTAGE: 12.0V
MEASUREMENT CONDITION
VOR: 4.9V
RX: 4.9V
TX: 4.9V
VOR: 0.75V
RX: 0.1V
TX: 0.1V
RX: 5V
TX: 3.6V
5V

Icom IC-A22 Specifications

General

Brand	Icom
Model	IC-A22
Category	Transceiver
Language	English