Main Unit - Icom IC-A110 Service Manual

10-2 MAIN UNIT

Note
R8
U : [USA/-1] only
C46
0.01
IF AGC
J5
1
3
RMUT
5
SPE
C48
AFMUT
7
0.1
SPE
SMUT
9
SP
TX: 0 V
VCS Q4
RX: 2.13 V
11
R35 2SC4215
SP
100
SCK
13
C47
8V
0.1
SO
15 TX: 0 V
VCC RX: 2.14 V
BEEP
17
5V
FISW
19
to FRONT TRC
Unit J1
UNLK
21
TMUT
PLSTB
23
PSWC 5V
SO
25
CPU5V
SCK 1
27
MICE 3
R/T
29
MIC
31
PTT
SQLI
33
PTTS 5V
35
37
39
5V
TX: 4.96 V
RX: 0 V
Q52
2SA1622
PTTS
TX: 0 V
RX: 8.05 V
PTT
J6 MIC
8V
MICE
EMIC
C404
EPTT
0.47
AFOUT
IC37
TDA7233D
4
+VS
3
GND
C550
2
J7 0.001 MUTE
1
GND
a
(EXT SP)
C551
47p
T1
ST-82(P)
L86
ZBFS5101-PT
8V
VCC
5V
COMPLETE VIEW
W28
FI3
CFWM450D
IC18
W25
TC4W53FU U
O I
1 8
IC17
2 7 TC4W53FU U
3
6
4 5 8 1
FI4
CFG450H U
7 2
3 1 6 3
2 5 4
R288
1k
5 4
5V
FISW
FISW
IF AGC
Q5
R40 2SC4215 TX: 0 V
2.2k RX: 4.83 V
C53
C50 R371 C51
0.01
0.1 10k 0.01
Q7
TX: 0 V
2SC4211
RX: 0.94 V
Q6
2SC4215
TX: 0 V
RX: 1.88 V
R370
10k
R484 R328 R333
3.9k 56k 10k
C55 R331
0.01 220k
R330
TBPS1R154K475H5Q
TX: 2.07 V
IC5 IC51 RX: 2.05 V
TA75S01F TA75S01F
C542 C543 IC19c
R235 R236
5 0.1 0.1 5 NJM2902V
+ 4 1 22k 22k
+ 4 10
— 3 + 8
2 C541 — 9
R234
2 —
0.1
22k
R120 TX: 2.28 V
100k
RX: 2.3 V
W20
IC22
TC4W53FU
IC31
R122 R123 R124
39k 39k 39k 5 TA75S01F 8
1
+ 4 7
3
6
—
2
5
TX: 2.15 V
RX: 2.03 V
IC16
R111
R113
TC4W53FU
100k
33k
C110 R108
1 1k
8 1
IC4
7 2 BA3308F
3
6 8 7
NC OUT2
5 4 9 6
IN2 NC
10 5
NF2 VCC
11 4
NF1 ALC
12 3
NC NC
13 2
IN1 GND
14 1
NC OUT1
8V
MICE
R444
TX: 8.28 V
10k
R340 SQL Open: 8.3 V
560
SQL Close: 0.3 V
IC30
R273 C353
TC4S66F
470k 0.1
Q74
5
OUTPUT 2SB798
6
SVR
7
—INPUT
8 Q86
+INPUT
R323
XP4315
Q75
10k
2SC4081
3 4
R380 C343 D43
10 100 1SS352
2 5
1 6
10 - 2
FI1
D30 C333 R447
FL-306
1SV307 0.01 1.2k
R8
TX: 0 V
RX: 5.9 V
TX: 0 V
RX: 3.77 V
IC40 D31 FI2
C42 C332 R438
TA31136FN FL-307 U
1SV307
0.01 0.01 U 470 U
1 16 U
OSCIN MIXIN
2 15
OSCOUT GND Q3
3 14
2SC4215
MIXOUT N-REC
C41
4 13
VCC N-DET 0.01
5 12
IFIN RSSI
6 11
DEC IFOUT
7 10
FILOUT QUAD
8 9
FILIN AFOUT
C40
5V 0.001
FISW
2nd LO
R8
Q69
DTB123EK
5.0 V
TX: 0 V
RX: 0.52 V IC11
R184 NJM2107F
1M
RSSI 1 5
+ 4
Q77 3
—
2SD1819A 2 0 V
Q68
XP4315
3
R182 R183
470k 1M
2
Q78 R479
1
2SD1819A
NTCCM16084LH
IC19b
R237 R238
NJM2902V
R239
22k 22k 2 4
5 22k + 1 IC19a
+ 7 3
6 — NJM2902V
— 11
R240
TX: 2.17 V
22k
RX: 2.05 V
TX: 2.14 V
RX: 2.05 V
TX: 2.18 V C263
TX: 2.17 V
0.068
RX: 2.05 V RX: 2.05 V
IC19d
NJM2902V
13 MOD
14 —
12
+
1
2
3
4
MOD
1
+
3
—
R114
Q33
NTCCM16084LH
XP4315
3 4
R188 47k IC42
TA75S01F
2 5
1 6
5V
TRC
8V 8V
SMUT SMUT
VCS
SO
5V
C128 C126
4 5
IC13
0.1 0.1
TC9260F
2 1
9 8
DATA CX
3 10 7
STB CS
11 6
AGND AGND
12 5
LD2 LD2
13 4
IC28 C354 LD1 LD1 R131 C177
14 3
TC4S66F 1k 4.7
0.1 IN IN
5 4 15 2
OUT OUT
1 2 16 1
VDD VSS
3
Q81
DTC144EU
W33
AF
8V
VCC
5V
R448 D29
680 1SV307
C255
0.001
C318
0.01
0 V
1st LO
Q2
D28
3SK184
R439
1SV307
470 U
U
TUNE
R8
RF AGC
L54
5V
82nH
FISW
C91 L19 C98
2nd LO
0.001 39nH 15p
Q20
R8 2SK3074
5V
VCC
SQLI
T8
TX: 5.31 V
RX: 0 V
4 5V
C87
5
15p
R79
6
150
Q42
5V 2SC4226
C82
0.001
1st LO
8V
R/T
R357
1M
Q79
2SK880
CP1
TX: 2.0 V
R364 R375
1.2M RX: 2.04V
5.6k
R8
R372
TX: 0 V
100
RX: 6.04 V
5
4
C421 C423
2
22p 6p
2nd LO
Q83
2SC4215
4.02 V
5V
TRC 5V
8V
SMUT
VCS
SCK
SO
TX: 7.95 V
5V
RX: 0 V
R132
10k
BEEP X1
Q70 Q71
CR-657
DTB123EK DTC144EE
1
VCON
R186
150k
5V 2
GND
3
2 1
4 5
5V
IC6
TC4S66F RMUT
R8
TX: 4.98 V
SQL Open: 5 V MOD
Q80
DTA144EU SQL Close: 0 V
AF
8V
VCC
5V
C31 C28 R377
TX: 0 V
0.5p 0.001 22
RX: 5.6 V
TX: 0.39 V
RX: 2.08 V
L11 L10
RF AGC
LS-527 LS-527
Q1
3SK184
TUNE
R8
RF AGC
R435 C519
1.8k 470p
L23 C418 L67 L35
25nH 0.001 30nH 17nH
L22 R474
47nH 4.7
Q21
2SK3075
TX: 10.43 V
RX: 10.45 V
T8
L87 C78
56nH 20p
R415 C74
D11 1k 18p
Q15
MA77
2SC4228
C472
0.001
TX: 5.02 V
RX: 5.11 V
W29 TX: 5.42 V
RX: 5.44 V
TX: 7.1 V
RX: 7.13 V
Q16 2SC4116
Q58 XP1113 L39 R194
0.82uH 2.7k
1 5
2
L43
0.82uH
3 4
R/T
TX: 0 V
RX: 7.09 V
TX: 2.4 V
CP2
RX: 2.44 V
R251
R62 R61 L33 D64 C195
TX: 7.05 V
4.7k
1k 2.2k 0.82uH HVU350 20p
RX: 0.54 V
L40
MC152-
E558CN-
100025
TX: 0 V
RX 2.96 V
R256
2.7k
L42 D65 C545
0.82uH HVU350 12p
L41
MC152-
W49
C426
E558CN-
20p Q84 100024
2SC4215
W48
IC2
TB31207AFN
9 8
CP2 FIN2
R64
10 7
W47 100k GND BS2
11 6
LD BS1
12 5
BO STB
13 4
XOUT DATA
14 3
XIN CLK
15 2
VCC GND
16 1
CP1 FIN1
W38
4
VCC
R218
4.7k
3
OUT
TX:
RX:
Q1
2S
C538
120p
C547
24p
C206
470