Icom IC-A210 Service Manual page 100

(Amended page)
July 2019
• MAIN-B UNIT 3/4 (for only IC-A220)
T4 IC4
HP
TDA7233D
R15 C47
OUTPUT
5
10 100 SVR
ST-82
6
-INPUT
7
+INPUT
8
R397
470k
R398
Q58
2SC4116
470k
R399
100k
MM Q60
RSR025N03
Q61
DTC144EU
R12
8C
100
Squelch OPEN: 5.0 V
Squelch CLOSE: 0 V
0.82U
L5 C34 C55
R20
MIC1
1 2.2k
1
IC2
6.0 V
1 14
NC NC
2 13
NC NC
3 12
L6 C54 IN1 OUT1
C35 R21
4 11
MIC2
IN2 OUT2
10
5
0.82U 1 2.2k 1
MUTE GND
6 9
SDA VREF
7 8
SCL V+
GND NJU72341V
7.8 V
R40
1k
R47
820k
6
C58
5
0.01
R48
820k
2
C59
3
0.01
10.1 V
8.2 V
IC6
BA08FP
+VS
4
GND
3
10C
MUTE O I
2
GND G
1
R282 R294 C93
0 2.2k 0.47
R9 C255
IC76
47k
TA75S01F
5
R359 C362
3
C293
4
33k 1
1
0.47
2
C356 100P
R360
100k
IC13
BA3308F
R55 C78 NC OUT2
8 7
IN2 NC
9 6
1k 1
NF2 VCC
10 5
NF1 ALC
R56
11 4
NC NC
12 3
1k
INI GND
13 2
NC OUT1
14 1
8
V+ IC3
GND NJM2904V
4
7
D16
IC3
DAN217
NJM2904V
ANL function ON: 0 V
1 ANL function OFF: 3.3 V
D17
IC3
DAN217
NJM2904V
Explanatory notes
TX Line
RX Line
Voltage Line (10V)
Voltage Line (8V)
Voltage Line (5V)
Voltage Line (3.3V)
The underlined parts have been updated from the previous version of the addendum, or the original pages
C430
1
IC14
1 14
IN1 OUT1
2 13
IN2 OUT2
12
3 IC90
IN3 OUT3
11
4 1 5
IN4 OUT4 CTRL VIN
5 10 2
MUTE GND GND
6 9 3 4
SDA VREF NC VOUT
7 8
SCL V+
NJM2830U1
NJU72342V
1
R293
4.7k
RX: 0 V
TX: 4.0 V
IC22
R97 5
C107 TA75S01F
3
R120
4
1 120k
1
0
2
R112
100k
3.3C
IC70 5
C157 R279 R156
5 1 6
2 7
0.1 0
4.7k
4 3 8
TC4S66F
1.0 V
Q21
L2SC4081
R173 R175
AM_DET_OUT
15k 0
9-11g
R331 R368
C360
0.1
100k 100k
8.0 V
R431
0
R370
15k
IC67
1 5
2
R322 R95
3 4
0 3.3k
TC4S66F
8C
5C
3.3C
1.6 V
R78
IC26 IC7
TC4W53FU 1 8
0
C162 AGND VOUT
8 1 2 7
V+ V-
7 2 3 6
1
R131 NC NC R144
6 3 4 5
VIN CLK
5 4
1k 100
LTC1069
R137
10k
AM Mode: 0 V
5C
FM Mode: 2.4 V
C81
IC32
220P
4
3
R186
2
1
68k
TC4W53FU
5
3
R178
5
3 4
R191 R196 R198
4 1
10k IC38
1
IC37 3.3k 39k 39k 2 TA75S01F
2 TA75S01F
2.0 V
8C
2.2 V 5.0 V
R189
2.2 V
C175
56k
0.01
C186
Q24
2SC4215
0.01 Q25
R204
2SC4215
8.0 V 2.2k
R193 C196
10k 0.1
.
10C
R141 C397
100k 0.1
C132
220P
IC8
NJM2902V
R429
33k
1 14
2 13
C396
3 12
4 11
0.01
5 10
6 9
7 8
C177 C394
0.01
0.0018
C238 C393
1 0.01
R427
R113 27k
R114
33k
33k
IC9
1 8
GND V+
2 7
SDI OE
3 6
SCK CLK
4 5
SEN/ADR* CLK
LTC6904IMS8
MAIN-B 1/4
AM_MOD
MAIN-B 2/4
8T1
8T1
8T2
8T2
AM/FM
AM/FM
ANL
ANL
ICNTL
ICNTL
MM
MM
MI1L
MI1L
MI2L
MI2L
AUX1
AUX1
AUX2
AUX2
BPOUT
BPOUT
HP
HP
2.0 V
MIC1
MIC1
MIC2
MIC2
GND
GND
I2CLK
I2CLK
I2DAT
I2DAT
MAIN-B 4/4
FMDET
FMDET
IFO
IFO
IFI
IFI
AGC3
DET
8C
5C
C201 3.3C
0.1
R211 C212
Q26 100 0.01
R207 C206
2SC4215
10k 0.1
2.2 V