Icom IC-A22 Service Manual

10 - 2
10-2 RF UNIT
VOLTAGE LINE
Explanatory notes
TX LINE
RX LINE
COMMON LINE
0.001 C4144
3SK230
Q4001
G1
G2
0.001 C4042
560k R4023
5V
2SC4215
Q4003
TUNE
0.001 C4055
10k R4034
0.001
C4158
22p
C4047
0.001 C4119
unit J5003
to MAIN
unit J5004
to MAIN
0.001 C4125 0.001 C4147
CR-456
X4001
10p C4101 9p C4100 39p C4099
680 R4070
WX
UN9110(A3/E)
UNR9210J(A22/E)
Q4017
UN9210(A3/E)
UNR9210J(A22/E)
Q4019
0.001
C4149
0.001
C4108
MA132WK
D4018
1k(A3/E)
10k(A22/E)
R4066
MA8082 D4017
10k R4067 10k R4068
10k R4069
0.001 C4124
0.001 C4107
0.001 C4125
0.001 C4109
2.2k
R4065
0.1 C4104
1 C4102
1k R4064
0.001 C4145 0.001 C4123
4.7µH
L4025
4.7µH L4029 0.001 C4098
0.001
C4097
47 R4100
33p C4163
2SC4403
Q4015
470 R4101
0.001 C4096
C4048 0.001
470 R4086 56k R4061
0.001 C4095
0.1 C4164
15
R4027
15 R4028
1.5k R4029
2SC4403
Q7003
2SC4226
Q7002
2SC4226
Q7001
27k R7006
0.1µH L7003
18p
C7009
0.001
C7014
0.001 C7007
8.2k R7003
0.001
C7006
220
R7002
0.5p
C7008
R7005 100R7004 220
100 R7007 0.001 C7012
1.5p
C7005
MA304 D7001
MA77 D7002
R7009 10k
R7008 220k
24p C7002 47p C7001
8.2k
R7001
1.5p
C7004
LA-487
L7002
0.82µH
L7001
UN9210(A3/E)
UNR9210J(A22/E)
Q4016
2SC4116
Q4021
0.001
C7013
0.001 C7010
0.001 C7011 0.001 C4122
0.001 C4151
15 C4155
2.2k R4096 0.001 C4121
0.001 C4150 0.001 C4110 0.001 C4111 0.001 C4112 0.001 C4143
470k R4080
XP4601
Q4020
0.001 C4137
47k R4079
0.001 C4138
0.001 C4135
0.01 C4136
10k
R4059
10k R4060 10 C4094
2SC4211
Q4014
XP1401
Q4010
UN0210(A3/E)
UNR9210J(A22/E)
Q4011
0.001 C4092 50k R4057
22k R4058 68k R4056 0.001 C4090
VCC
T+5
MA111
D4016
10k R4054 2.2 C4080
2SC4211
Q4012
2SC4403
Q4004
LV
GND
SHIFT
OUT
5V
0.001
C4043
27k
R4030
0.001 C4044 150 R4031
0.15µH L4014
2SB1132
Q4013
2SC4403
Q4005
180p
C4045
56
R4089
0.001
C4152
0.15µH L4015
120 R4088 120 R4087
27k R4032
0.001 C4046
150 R4033 39p C4114
33k R4006 0.001 C4093
0.001 C4011
0.3p(IC-A3/E)
0.001(IC-A22/E)
56nH
L4006
MA728 D4004 0.001 C4160
15p C4012 0.001 C4162
0.001 C4015
270 R4004 270 R4005
33k R4099 C4161 MA728 D4005
1p C4159 15p C4013
0.001
C4014
0.001
C4130
10 C4078
0.001 C4140
10 C4139 0.001 C4141
MA8036 D4022
1 C4134
470 R4084 0.001 C4118 0.001 C4146
1SV246
D4013
2SC3357
Q4007
39p
C4059
0.001
C4058
2.2k
R4044
56 R4047
64nH L4017
0.001
C4057
1k R4045 560k R4102 0.001 C4056
1k R4043
2SC4403
Q4006
15k R4040
0.001 C4153
100 R4091
1k R4042
100 R4090 4.7µH L4027
0.1µH L4016
33k R4039
220 R4041
8p
C4054
0.001
C4053
0.001
C4129
220
R4073
0.001
C4051
1SV246
D4012
220(IC-A3/E)
220k(IC-A22/E)
MA77 D4021
MA77
D4010
R4095
0.001
C4049
10k R4037 0.001 C4050 0.001 C4156
68 R4093 68 R4094
10k R4036 10k R4035 0.001 C4016
100
R4001
0.82nH
L4007
MA77 D4003
C4007 22p
D4001 MA77
C4008 39p
D4002 MA77
C4009 15p
18p C4005 30p C4003 22p C4001
7p
C4002
3p
C4004
0.001
C4006
47nH
L4001
64nH
L4002
64nH
L4003
56nH
L4004
47nH
L4005
0.001
C4010
LB-170
L4008
C4017 4p
MA304 D4006
C4018 68p
100k R4072
0.001 C4019
220k R4007 220k R4008 68p C4020
MA304 D4007
LB-172 L4009
0.001
C4023
220k R4009
0.001 C4115
560k R4097
100k R4010
C4025 0.001
0.001(IC-A3/E)
68p(IC-A22/E)
R4011 47k
C4127 0.001 C4024 47 R4012
820 R4092
LB-326
L4010
MA304 D4008
68p C4027 0.001 C4028
220k
R4014
47 R4013
68p(IC-A3/E)
0.001(IC-A22/E)
C4029
220k
R4015
MA304 D4009
L4011 LB-172
18p C4113
100k R4071
0.001 C4116
10k
R4018
3SK151
Q4002
LS-492
L4012
FL-203(IC-A3/E)
FL-221(IC-A22/E)
FI4001
390(IC-A3/E)
560(IC-A22/E)
3.3k R4025
R4022
82k R4017
0.001 C4031
470k R4016 1M R4103
0.001 C4032
10 R4019
0.001 C4034
39p C4033 10k R4020
100 R4021
12p(IC-A3/E) 7p(IC-A22/E) C4036
0.01 C4038 2.2k R4024 0.001 C4039
0.01 C4037
SC-1303
IC4002
RF UNIT
EXTPTT
EXTMIC
EXTPTT
EXTMIC
CLONE
INTSP
EXTSP
SPE
CLONE
INTSP
EXTSP
SPE
SIDET
LOW
BOARD
VCO
MOD
PO VDD VSS
GNDGND
PI
4312
0.001 C4106
TMUT
R4098 100k
µPD3140GS
IC4001
GND2 CP2
LOK
CP1
14 13
7 8
VCC1
IN1
ENB
DATA
CLK
T1
FI1FI2
XO XI XS VCC2 IN2 GND1
FO1FO2
20
10
5 3 9
11
6 2
16 19 15
4
17 18 12
1
MA113 D4019
XP4601
Q4018
SB30-03P
D4020
0.001
C4148
SB30-03P
D4025
EXTPTT
EXTMIC
RF-AGC
CLONE
SIDET
INTSP
EXTSP
SPE
AGC
R5
IF
LOW
MOD
TMUT
VCC
WX
+5
LOK
DATA
ENB
CLK
HV
VCC
(MIC)
J4003
J4004
(SP)
J3001
CHASSIS
(ANT)
RF-AGC
AGC
R5
0.01
C4040
IF
F8001 SSFC3A
C
-
+
J4006
J4005
(DC 12V)
J4002
PRT UNIT
PACK
BATTERY
to
RX: 3V
TX: 0V
RX: 1.35V
TX: 0V
RX: 2.05V
TX: 0V
RX: 1.4V
TX: 0V
11.7V
OFF: 0V
WX ON: 5V
11.7V
OFF: 1.3V
WX ON: 4.4V
5V
WX OFF:3.8V
RX: WX ON: 0V
TX: 0V
5V
4.2V
RX: 2.2V
TX: 2.1V
RX: 0V
TX: 2.8V
RX: 0V
TX: 1.8V
RX: 0.5V
TX: 0V
0V
RX: 2.9V
TX: 0V
RX: 0V
TX: 2.4V
RX: 0V
TX: 3.5V
RX: 0V
TX: 0.8V
3.1V
0.8V
0.65V
RX: 1.5V
TX: 1.43V
0.95V
2.3V
2.7V
2V
0.8V
3.1V
RX: 0V
0.5V(IC-A3/E)
TX: 0.8V(IC-A22/E)
RX: 5V
TX: 0V
RX: 0.7V
TX: 0V
RX: 1.45V
TX: 0V
RX: 0.65V
TX: 0.65V
RX: 0V
TX: 3.2V
RX: 0V
TX: 3.4V
0.8V
3.5V
1.45V
0.6V
2.8V
RX: 0V
TX: 4.4V
RX: 0V
TX: 5V
11.7V
RX: 0V
TX: 5V
RX: 0V
TX: 1.7V
FREQUENCY: 127.025MHz(NO MODULATION)
VOLTMETER:50kΩ/V DC
VOLTAGE: 12.0V
MEASUREMENT CONDITIONS
RX: 0V
TX: 0.85V
RX: 0V
EXT SP NOT CONNECTED: 0V
EXT SP CONNECTED: 0.65V
TX
RX: 0V
EXT SP NOT CONNECTED: 0V
EXT SP CONNECTED: 5V
TX

Icom IC-A22 Specifications

General

Brand	Icom
Model	IC-A22
Category	Transceiver
Language	English