Icom IC-A110 Service Manual page 36

10-2 MAIN UNIT
Note
R8
U : [USA/-1] only
W28
FI3
CFWM450D
IC18
W25
TC4W53FU U
C46 O I
IC40
0.01
1 8 TA31136FN
IC17
TC4W53FU U
2 7 1
OSCIN
3 6 2
OSCOUT
4 5 FI4 8 1 3
MIXOUT
CFG450H U 7 2 4
VCC
3 1 6 3 5
IFIN
2 5 4 6
DEC
R288 7
1k FILOUT
5 4 8
FILIN
5V
FISW FISW
J5 IF AGC IF AGC
1
3
5 RMUT
SPE Q5
C48 R40 TX: 0 V
AFMUT 2SC4215
7 0.1 2.2k RX: 4.83 V
SPE
C50 R371 C51 C53
9 SMUT 0.01
0.1 10k 0.01
SP Q7
TX: 0 V TX: 0 V
VCS Q4 RX: 2.13 V 2SC4211
11 Q6 RX: 0.94 V
SP R35 2SC4215
2SC4215
100 TX: 0 V
SCK
13 C47 R370 RX: 1.88 V
8V Q77
0.1 10k
SO R484 R328 R333 2SD1819A
15 TX: 0 V 3.9k 56k 10k
VCC
RX: 2.14 V
BEEP
17
5V
FISW C55 R331
19 0.01 220k
to FRONT TRC
Unit J1
UNLK
21 R330
TMUT
TBPS1R154K475H5Q
PLSTB
23
PSWC 5V TX: 2.07 V
SO IC5 IC51 RX: 2.05 V
25
CPU5V TA75S01F TA75S01F
C542 C543 IC19c R237
SCK 1 5 0.1 0.1 5 R235 R236 NJM2902V 22k
27 + 4 1 22k 22k
MICE 3 + 4 10
— 3 + 8
R/T 2 C541 — 9
29 2 R234 —
MIC 0.1
22k
31
PTT
R120 TX: 2.28 V
SQLI
33 100k RX: 2.3 V
PTTS 5V
35
W20
IC22
37
TC4W53FU
39 R122 R123 R124 IC31
39k 39k 39k 5 TA75S01F 8 1
1
+ 4 7 2
3
— 6 3
2
5 4
TX: 2.15 V
RX: 2.03 V
5V
TX: 4.96 V IC16
R111
RX: 0 V TC4W53FU R113
100k 33k
Q52 C110 R108
2SA1622 1 1k
PTTS 8 1 IC4
7 2 BA3308F
6 3 8 7
4 NC OUT2
5 9 6
IN2 NC
10 5
NF2 VCC
11 4
NF1 ALC
12 3
TX: 0 V
NC NC
RX: 8.05 V 13 2
IN1 GND
14 1
NC OUT1
PTT
J6 MIC
8V 8V
MICE MICE
EMIC
C404 R444 TX: 8.28 V
EPTT 0.47 10k
R340 SQL Open: 8.3 V
AFOUT
560 SQL Close: 0.3 V
IC30
R273 C353 TC4S66F
470k 0.1
2
IC37
TDA7233D
Q74
4 5
+VS OUTPUT 2SB798
3 6
C550 GND SVR
2 7
J7 0.001 MUTE —INPUT
1 8
GND +INPUT Q86
R323 XP4315
a Q75 5
(EXT SP) C551 10k
2SC4081 3 4 1
47p T1 R380 C343 D43
ST-82(P) 10 100 1SS352
L86 2 5
ZBFS5101-PT
1 6
8V
VCC
5V
LEFT SIDE 10 - 2
FI1
D30 C333 R447 R448 D29
FL-306
1SV307 0.01 1.2k 680 1SV307
R8
C255
0.001 L11
TX: 0 V C318 LS-527
RX: 5.9 V 0.01
TX: 0 V 1st LO 0 V
RX: 3.77 V
Q2
FI2
D31 D28 3SK184
C42 C332 R438 FL-307 U R439
1SV307 1SV307
0.01 0.01 U 470 U 470 U U
16 U
MIXIN
15
GND Q3
14
N-REC 2SC4215
13 C41
N-DET 0.01
12
RSSI
11 TUNE
IFOUT
10 R8
QUAD
9
AFOUT
RF AGC
C40 L54
5V 0.001 5V
82nH
FISW FISW
2nd LO 2nd LO C91 L19 C98
0.001 39nH 15p
Q20
R8 R8 2SK3074
Q69
DTB123EK
5.0 V
5V
TX: 0 V
RX: 0.52 V IC11
R184 NJM2107F
1M RSSI
1 5 VCC
+ 4 SQLI
3 T8
—
2 0 V
Q68
TX: 5.31 V
XP4315
RX: 0 V
3 4 5V
R182 R183
470k 1M
C87
2 5
15p
Q78 R479 R79
1 6
2SD1819A NTCCM16084LH 150
Q42
5V 2SC4226
C82
IC19b 0.001
R238 NJM2902V
22k R239 2 4 1st LO
5 22k + 1
IC19a
+ 7 3
6 — NJM2902V
— 11 8V
R240
TX: 2.17 V
22k
RX: 2.05 V
TX: 2.14 V
RX: 2.05 V
C263
TX: 2.18 V TX: 2.17 V
0.068
RX: 2.05 V RX: 2.05 V
IC19d
NJM2902V R/T
13 MOD
14 —
12
+
R357
1M
Q79
2SK880
MOD
CP1
R364 TX: 2.0 V R375
RX: 2.04V
1.2M 5.6k
R8
R372
TX: 0 V
100
RX: 6.04 V
1 5
+ 4
3
R114 — C421 C423
Q33 2
NTCCM16084LH 22p 6p
XP4315 2nd LO
3 4
R188 47k IC42
TA75S01F
2 5
Q83
4.02 V 2SC4215
1 6
5V 5V
TRC TRC 5V
8V 8V 8V
SMUT SMUT SMUT
VCS VCS
SCK
SO SO
TX: 7.95 V
5V 5V
RX: 0 V
C128 C126 R132
4 5 IC13
0.1 0.1 10k
1 TC9260F BEEP X1
Q70 Q71
9 8 CR-657
DATA CX DTB123EK DTC144EE
3 10 7 1
STB CS VCON
R186
11 6
AGND AGND 150k
12 5 5V 2
LD2 LD2 GND
13 4
IC28 LD1 LD1 R131 C177
C354 14 3 3
TC4S66F 0.1 IN IN 1k 4.7
4 15 2 2 1
OUT OUT
2 16 1
VDD VSS
4 5
3
5V
IC6
TC4S66F RMUT
R8
TX: 4.98 V
Q81
DTC144EU Q80 SQL Open: 5 V MOD
W33
AF DTA144EU SQL Close: 0 V AF
8V 8V
VCC VCC
5V 5V
C31 C28 R377
TX: 0 V
0.5p 0.001 22
RX: 5.6 V TX: 0.39 V TX: 0 V
RX: 2.08 V RX: 1.7 V
L10 C358 C23 C342 C165 C10 D38
RF AGC
LS-527 47p 0.75p 4p 27p 56p 1SV271
Q1 L49 L9
3SK184
LS-527 LS-527
TX: 0 V
RX: 0.83 V
Q73
TUNE TUNE
2SC4081
R8 R8
D53 D54
RF AGC RF AGC
MA2S111 MA2S111
R435 C519
1.8k 470p L23 C418 L67 L35 L68 L69 C520 R468 C554 R473
25nH 0.001 30nH 17nH 8.8nH 17nH 270p 2.2 470p 180
L22 R474
47nH 4.7
Q21
2SK3075 Q51
MRF137
TX: 10.43 V R219 13.53 V
RX: 10.45 V 39 DC2
MOD V
TX: 7.94 V
RX: 0 V
T8 T8 T8
L87 C78
56nH 20p
TX: 6.68 V
R415 C74 RX: 0 V
D11 1k 18p
MA77 Q15
C72
2SC4228
C472 20p
Q14
0.001
2SC4403
TX: 5.02 V
RX: 5.11 V TX: 5.42 V
W29
RX: 5.44 V
TX: 7.1 V
RX: 7.13 V
Q16 2SC4116
Q58 XP1113 TMUT
L39 R194
0.82uH 2.7k
1 5
2
L43 R451
0.82uH 4.7
3 4
TX: 1.03 V TX: 3.72 V
R/T TX: 0 V
Q44 RX: 0 V RX: 3.73 V
RX: 7.09 V
TX: 2.4 V 2SC4226
CP2
RX: 2.44 V R251
R62 R61 L33 D64 C195 C538 C539 R65
TX: 7.05 V 4.7k
1k 2.2k 0.82uH HVU350 20p 120p 10p 15
RX: 0.54 V
VCC
L40 C188
MC152- C391
0.5p 33p
E558CN-
100025 Q43
TX: 0 V 2SC4226
RX 2.96 V R256
R460
2.7k 4.7
VCC
Q59 TX: 0 V
RX: 0.8 V
2SC4226
L42 D65 C545 C547 C546
0.82uH HVU350 12p 24p 9p TX: 3.64 V
RX: 3.65 V
L41
MC152-
C426 W49 E558CN-
20p Q84 100024
2SC4215 W48
IC2
TB31207AFN C70
0.001 MOD V
9 8
R64 CP2 FIN2 C68
10 7
W47 100k GND BS2 0.001
11 6 Q12 8V
LD BS1
12 5 2SC4403
BO STB R8
13 4 IC41
XOUT DATA
14 3 TA8208H
XIN CLK
15 2
VCC GND
16 1
CP1 FIN1
C206 C209 R209 C530
470 0.47 47k 0.0056
C398 C529
W38 0.22 0.047
4
VCC
R218
4.7k
3
OUT TX: 0 V
VCC
RX: 7.93 V
R8
MOD
AF
8V
VCC
5V
MOD V (W36)
CP7 CP6 CP5
C362 L5 L4 C6 L3 L2 L48
0.001 LA-244 LA-244 0.001 LA-263 LA-253 LA-243
C4 C2 C330
1.5p 5p 9p
5.03 V IC26
TA78L05F Q82 L78
2SC4081 ZBFS5101-PT
CPU5V
O I
G
MOD V
L70 L71 L50 C20 L6 C11 L7 R1
LA-232 LA-382 LA-262 0.001 LA-235 0.001 LW-25 100
T8
R471
22k
D5 D4 PSWC Q102
RB706F-40 RB706F-40 2SC4081
T8
IC48
Q98
2SA1586 TC4W53FU
TX: 2.44 V 5V 8 1 R404
R429 2.2k
RX: 0 V 7 2
10k AF
R424
MOD 6 3
100k
5 4
R280
Q11 C140 10k
R426 R425
2SC4081 5 0.001 R148
47k 22k 1
4 + 22k
3
— TRC
0 V
2
C120
IC50
R430 TA75S01F 0.47
12k
Q99
TX: 1.69 V
2SC4116
RX: 0 V
R150 10k W32
IC44
10.44 V uPC311G2
5 4
6 3
7 2
Q23
2SB1132 8 1
5.0 V
IC29 IC7 Q22
R442
BA08FP S-81350HG-KD R127 2SC4211
10k 10k
I O I O D15 5.0 V R412
G G
MA111 10k
PSWC
MOD V
C505
Q87
470
2SK2414-Z
Q53
DTB123EK
Q100 Q94
D66 Q101
FW215 FW215
SB07-03C DTC144EU
Q72 8 1
D1 S1 VCC
XP4315
7 2
D1 Q1 R440
3 4 6 3
D2 S2 R466 10k
5 4
D2 G2 10k
2 5
Q97 Q96
DTC144EU DTC144EU D62
SB07-03C
1 6
L53
HK-08S070-1310
TX: 0 V
W35 D26
SQL Open: 4.9 V 10.45 V DE5SC6M
SQL Close: 0 V
VCC
Q88
2SK2414-Z
MOD
AF
VCC VCC
5V
CHASSIS
J1
MOD V W3
W2
(ANT)
L62 L63 L64
HK-08S070- HK-08S070- HK-08S070- L80 W4
1310 1310 1310 ZBFS5101-PT
DC1
L81
ZBFS5101-PT GN1 GN2
C453 (W37)
3.3
IC47
HIP4081AIB
Q93 20 1
BHO BHB
2SK2414-Z 19 2
BHS BHI
Q92 18 3
BLO
2SK2414-Z 17 DIS 4
BLS VSS
16 5
VDD BLI
15 6
VCC ALI
FI5 14 7
ALS
ACF321825-223 AHI
13 8
ALO HDEL
12 9
AHS LDEL
11 10
AHO AHB
D56
39.7 V DE5SC6M L61
HK-10S080-1210
Q91
2SK2414-Z
FI6
IC46 BNX-002-01
MC33063AD 1 2 CP3
+
1 8 1
SWC DRVC
2 7
SWE LPKSEN
3 6 3 4 5 6
TIMCAP VCC
4 5 CP4
GND COMPIN —
2
D36 EP2
DSA3A1 W1
L65
10uH
13.72 V
Q90
IC45
2SA1471R
NJM072BM
1 8
2 7
C446
330p 3 6 5 4
4 5 Q89
XP1501
R393 1 2 3
15k
W34
10.1 V
D55 L60
SB07-03C 10uH
W43
20 1
BHO BHB IC15
MC33063AD
19 2
BHS BHI
18 3 1 8
BLO DIS SWC DRVC
W44 17 4 2 7
BLS VSS SWE LPKSEN
16 5 3 6
VDD BLI TIM CAP VCC
15 6 4 5
VCC ALI GND COMPIN
14 7
ALS AHI
13 8
ALO HDEL
12 9
AHS LDEL
11 10
AHO AHB
IC43
HIP4081AIB
RIGHT SIDE