Icom IC-V8 Service Manual

D37
MA2S077
R354
2.2k
C105
0.01
C295
0.001
C397
4p
C236
0.01
C2
1
C111
0.01
C54
0.001
C55
0.01
C131
0.01
C106
22p
VIN1
1
VOUT1
2
VOUT2
3
VIN2
4
VDD
5
LD
6
CLK
7
DI
8
VIN3
9
VOUT3
10
VOUT4
11
VIN4
12
VIN5
13
VOUT5
14
VOUT6
15
VIN6
16
DO
17
VDAREF
18
RESET
19
GND
20
VIN7
21
VOUT7
22
VOUT8
23
VIN8
24
C368
0.5p
R41
100
C119
1
R82
1.8k
C47
0.47
C124
0.01
R184
10k
C61
12p
R88
33k
C50
3.3
R310
47k
C386
22p
C301
0.001
R87
2.2k
R305
100
R170
10k
C356 0.001
C391
22p
R307
390
C70
0.001
C300
0.001
C123
0.001
R311
47k
C48
10
R300 10k
L14
82nH
R315
8.2k
C132
0.0056
X1
CR-659
21.250 MHz
R75
220
C62
9p
W9
FI2 SFPC450E
I
O
G
C217
0.1
C120
0.1
R85
1.5k
1
2
3
4
5
6
R302
10k
R79
1k
R81
470
C365
0.75p
C395
18p
C392
10
R112
1M
C31
5p
EP3
MMZ1608Y102BT
C125
0.0022
C290 0.001
C2
1
R313
1k
C303
0.001
R177
1k
C21
X3
CDBCA450CX24
C244
0.01
R169
39k
1
2
3
4
5
6
W8
R49
47k
R70
100k
C147
0.047
C60
0.001
C100
39p
R50
470k
C128
0.1
R328
100k
C398
4.7
R327
100k
C197
0.1
L21
47nH
R262
680
R33
220
R301
680
C28
12p
R304
220
C122
220p
C358
0.001
R329
47k
C367
0.5p
C293
0.1
C304
0.047
R353
10k
R227
12k
R20
180k
R95 1.5M
C394
0.1
R352
270k
C209
0.1
C249
0.01
C372
0.022
R104
100k
R314
4.7k
C72
1
C102
56p
C
5
C115
0.01
C116
82p
R306
330
C113
0.001
R130
100k
C64
8p
R32
390
FI3 FL-298
21.700 MHz
C363
0.001
C117
0.001
6
5
7
C369
0.033
1
OUT
2
VDD
3
VSS
NC
4
CD
5
C230
0.027
C112
0.001
R131
470
R321
10k
R150
470
C69
68p
R303
220
C121
220p
R266
15k
R336
100k
R84
390
R83
470
C104
0.001
C234
0.001
C216
0.047
C108
0.01
C126
0.0027
R224
120k
C29
0.001
C107
0.001
R23
680
C219
0.01
C30
22p
R18
39k
R93
27k
C32
0.001
R337
1.8M
R77
100
C370
0.0018
C154
10
R324
1.2k
C360
0.001
R137
100
D7
HVC376B
R257
1
C357
0.001
C233
0.001
L36
2.2 H
W12
R105
470
R309 8.2k
C374
0.0022
C110
5p
R94
1M
C114
0.033
9
10
8
C396
33p
L20
2.2 H
R108
150k
EP4
MMZ1608Y102BT
R80
82k
R176
3.9k
FI1 FL-298
21.700 MHz
R185 1k
L29
68nH
R186
47k
C361
0.001
R44
10k
C33
0.001
R48
10k
R355
220k
R148
100k
L33
LB-277
D38
HVU350B
OSCIN
1
OSCOUT
2
MIXOUT
3
VCC
4
IFIN
5
DEC
6
FILOUT
7
FILIN
8
AFOUT
9
QUAD
10
IFOUT
11
RSSI
12
N-DET
13
N-REC
14
GND
15
MIXIN
16
C364
27p
R22
68k
XIN
CL
2
DI
3
CE
4
VCCR
5
PI
6
GNDR
7
TEST
8
CP
9
PDP
10
PDN
11
GNDD
12
VCCD
13
PE
14
OUT
15
XOUT
16
C
C388
22p
C393
33
R35
100
C101
56p
R86
47k
R360 2.7k
R326
68k
C174
22
R139
10k
R21
1k
R261
47k
C161
0.01
C162
0.01
R141
4.7k
I/O
1
O/I
2
O/I
3
I/O
4
CONT. B
5
CONT. C
6
VEE
7
I/O
8
O/I
9
O/I
10
I/O
11
CONT. D
12
CONT. A
13
VDD
14
C375
0.001
R232
1k
R226
1k
R103
12k
C195
56p
C1
9
8p
C118
0.01
C387
47p
L34
2.7 H
C373
0.0068
R244
100k
R320
15k
R319
68k
R30
4.7k
C133
0.1
R318
68k
C389 0.001
R323
10k
C134 220p
R264
68k
R325
68k
1
2
3
4
5
6
D
C144
0.001
R72
10k
R359
1M
123
4
5
6
R361
1M
R351
82
W13
CIRQ S2 CCS
PCON
PS5C
T5C
DET
S1 OPT1 OPT2
OPT3
SI
NOIS
NOIS
SCK
SO
T3T3
SO
SCK
T2T2
T1
FC DTC
DUSE
MICOUT
MMUT
RMUT
VOLIN
SQLIN
TONE
SICO
CTCSS
CTCSS
NOIS
SD
SQLIN
SQLIN
LVIN
PSVCO
SO
PLST
DEV
DEV
DTC
FC
PTT
MICIN
OPV1
DET
UNLK
T5
PS5
PS5
PS
5
PS5
PS5
VOLOUT
SW5V
SW5V
PLCK
CPU5
CPU5
PLCK
R5C
R5
R5
VCC
VCC
DISCIN
SW5V
PTTOUT
PTTIN
MICOUT
MICIN
VCC
T5
R5
SW5V
VCC T5 R5 SW5V
PS5
VCC T5 R5 SW5V
PSVCO
T5
VCC
PS5
R5
CP1
R164
100k
SICOSICO
OPV2
OPV2
OPV3OPV3
OPT3
OPT3
OPT2
OPT2
OPT1
OPT1
MICIN
MICOUT
MICIN
MICOUT
OPV1
OPV1
PTTOUTPTTOUT
PTTINPTTIN
DC POWER SUPPLY: 7.2 V
MEASURMENT: TESTER (INNER RESISTANCE MORE THAN 50 k‰/V)
R260
10k
VCC VCC
1
4
R331
10k
C173
100
C283
0.0022
C305
470p
C282
0.001
I
O
G
12
3
5
D39
MA2S111
R335
1M
R332
4.7k
R330
10k
C380
22
C377
22
C381
10
C379
0.001
C378
0.1
C376
0.001
C385
0.1
R333
1M
R334
1M
S801
ENCODER
E
UP
DN
C400
0.0022
DICK
DIUD
S123
D48
MA2S111
[USA] only
D46
MA2S111
[USA] only
D45
MA2S111
[USA] only
D40
MA2S111
D41
MA2S111
D42
MA2S111
D43
MA2S111
D44
MA2S111
R239
1k
R238 1k
S112
S108
S105S104
S113
S116
S120
S109
S117 S118
S114
S122S121
S110
S111
S115
S119
KR3
KR2
KR1
KR0
KS0
KS1
KS2
KS3
KS4
ISO
R240
1k
S1
R348
1k
S2
S1
S2
ISO
Q54
2SA1576
Q5
2SC4406
IC10
M62363FP-650C
Q13
3SK274
Q14
2SC4406
Q59
2SC4116
Q11 XP4601
Q6
2SC4406
Q53
XP4601
IC3 NJM12902V
IC11
S-80942ANMP-DD6
Q51
DTC144EU
IC3
NJM12902V
Q34
2SK1069
Q17
UN911F
IC2 TA31136FN
IC1 LV2105V
IC4 BU4066BCFV
Q22
2SA1576
Q43
DTC144EU
Q38
DTC144EU
Q50
UMX5
Q58
XP4601
Q55
2SB1132
IC12
S-81350HG-KD
Q57
XP1501
Q56
UN9213
Q21
2SA1576
MAIN UNIT
GND
BATT
SW5V
SW5V
VCC
SD
CLIN
CTCSS
CPU5
CTCC
VCC
VOLIN
CTCIN
VOLOUT
CTCIN
J5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
SCK
SO
SCK
SO
CCS
CIRQ
DISCIN
DISCIN
5V 5V
GND
GND
AFOUT
AFOUT
REM
R136
100
C223
0.01
R362
10k
CCS
CIRQ
SISI
F (DET)
TO
OPTIONAL
UNIT
UP DN
123P0
456P1
789P2
0#P3
4.92V
4.35V
TX: 4.21V
RX: 4.99V
TX: 4.97V
RX: 4.27V
TX: 4.67V, RX: 0V
TX: 0V
RX: 4.88V
TX: 4.82V
RX: 0V
TX: 2.79V
RX: 4.97V
1.34V
1.45V
0.76V
4.68V
4.00V
4.75V
2.33V
TX: 0V, RX: 4.53V
TX: 1.99V
RX: 0V
0.71 V
2.46V
0.74V
2.77V
0.96V
1.83V
0.73V
1.21V
0.74V
TX: 0V
RX: 3.26V
TX: 0V
RX: 0.74V
TX: 0V
RX: 4.55V
TX: 0V
RX: 0.74V
TX: 1.9
RX: 1.
6
7.20V
6.60V
4.43V
4.99V
4.97V
4.99V
ON: 4.87V
OFF: 0V
SECTION 12 VOLTAGE DIAGRAM
12 - 1

Icom IC-V8 Specifications

General

Frequency Range	136-174 MHz
Power Output	5.5 W
Mode	FM
Receiver Sensitivity	0.16 μV (12dB SINAD)
Channel Spacing	12.5/25 kHz
Voltage	7.2 V DC