Icom IC-V8 Service Manual page 29

SECTION 12 VOLTAGE DIAGRAM
VCC
T5
R5
J5 SW5V
PSVCO PSVCO
16 SCK SCK R362 X1
10k C72 R48 R49 C69 CR-659
15 OPV1 W13 21.250 MHz
OPV1 1 10k 47k 68p
17 DTC
SI SI
14 OPV2 OPV2 FC
D7 C64
18 SO SO 1.34V
HVC376B 8p
R50 C70
13
OPV3 OPV3 470k 0.001
19
CIRQ CIRQ
12
GND
PLCK
20 CCS CCS
SO
11 OPT3 OPT3 PLST
21 R164
REM
100k
10
OPT2 OPT2
22
AFOUT
TO 9 OPT1 OPT1 UNLK
OPTIONAL 23
DISCIN R185 1k
UNIT
8 SICO SICO
24
C234
7
0.001
25 R136
100 F (DET)
6
26
5
CP1
27
4 MICIN MICIN
28 LVIN
3
MICOUT MICOUT
C233
29
5V 5V 0.001
2 PTTOUT PTTOUT
30
GND
1
PTTIN PTTIN
C223
0.01
R88
33k
7.20V
R87
2.2k
VCC VCC
BATT
C400 C283 C305 C173
0.0022 0.0022 470p 100 IC12 SW5V
GND
S-81350HG-KD VCC
DISCIN
I O PS5
R331 C282
6.60V G
10k 0.001
Q55
5 4
2SB1132
R131
Q57 D 470
4.97V
XP1501 PTT
C147
0.047
4.43V 1 2 3
TX: 4.82V
C380 C379 RX: 0V
ON: 4.87V
22 0.001 MICIN
OFF: 0V
MICOUT
R332 Q56
4.99V 4.7k
R335
UN9213 SW5V
1M
D39
MA2S111
CPU5
DEV
4.99V VCC
C377 C378 R330
C376 C381
22 0.1 10k SQLIN
0.001 10
4.92V
T1
C385 R334 R333
0.1 T2 T2
S801 1M 1M
ENCODER
DICK OPV1
UP
SCK
E
SO
DIUD
DN
T3 T3
ISO
TX: 4.67V, RX: 0V
S104 S105 D45
UP DN D40 MA2S111
[USA] only
MA2S111
R5
T5
SW5V
S108 S109 S110 S111 D46
MA2S111 Q54
1 2 3 P0 D41
MA2S111 [USA] only 2SA1576
S112 S113 S114 S115 R328
100k
4 5 6 P1 D42
MA2S111
C375 R329
C398
0.001 47k 4.7
D48 R239
S116 S117 S118 S119
MA2S111 1k
7 8 9 P2 D43 KS4 4.35V
MA2S111 [USA] only
PCON
R238 1k
KS3
S120 S121 S122 S123
KS2
0 # P3 D44
KS1
MA2S111
KS0 S1
KR3
R240
KR2 1k
S1 S2
KR1
KR0
12 - 1
Q11 XP4601
R337 4 3 4.68V
1.8M
5 2
4.00V
6 1
1.45V
R355 C394
R21
220k 0.1 R353
10k C300 1k
Q59 R30 4.75V 0.001
C301 4.7k C50
0.001 3.3 C32
C395 2SC4116 0.76V L14 R306 R20
0.001 180k
18p 82nH 330
2.33V Q51
C396 R354 C397 R41 C30 DTC144EU
33p 2.2k 4p 100 C61 C62 22p
1 16 12p 9p
XIN XOUT
2 15 C60 Q5
CL OUT
3 14 0.001
DI PE 2SC4406
4 13 TX: 0V, RX: 4.53V
CE VCCD R264
5 12
VCCR GNDD 68k
6 11
W8 PI PDN R35
7 10
GNDR PDP 100
C55 8 9
TEST CP R352 R361 R351 C392
0.01 1M C393
W9 270k 82 10
33
C54
C293 IC1 LV2105V 0.001 R33
6 5 4
0.1 R184 220
10k
Q58
XP4601
Q34
C48 1 2 3
2SK1069
10
R360 2.7k
PS5
R5
EP3 EP4
C290 0.001 R81 C111
MMZ1608Y102BT MMZ1608Y102BT R300 10k
470 0.01
R84
C388 C387 C386 R301 390
TX: 0V
R186 22p 47p 22p 680 R80
47k RX: 3.26V 82k
W12
C389 0.001 R85 R82 C115 C391
C117 R244 X3
1.5k 100k 1.8k 0.01 22p
0.001 CDBCA450CX24
1 OSCIN MIXIN 16
FI2 SFPC450E
2 OSCOUT 15
3 GND 14
O I
4 MIXOUT N-REC 13
G VCC N-DET C116
C121 5 12
IFIN RSSI 82p
220p 6 11
DEC IFOUT Q14
7 10
FILOUT QUAD
8 9 2SC4406
R86 FILIN AFOUT
47k R83
C114 C113 470 C112
IC2 TA31136FN
C122 C120 C118 C119 C303 0.033 0.001 0.001
0.001
220p 0.1 0.01 1
NOIS SD
DET
IC3
TX: 2.79V R177
RX: 4.97V NJM12902V 1k
C154 C304 R95 1.5M
C C132 C125
10 0.047 C217 C124
0.0056 0.0022
10 0.1 0.01
8 6
9 7
R130 R137
C209 R266 5
100k Q17 100 C134 220p C126
0.1 15k R104 R105 0.0027 R257
100k 470 R93
UN911F R176 1
27k
3.9k R94 IC3 NJM12902V
C133 R108 1M
0.1
150k
DET
VOLIN
SQLIN
VOLOUT
C123
R150 0.001
470 1 24
2 VIN1 VIN8 23
VOUT8
3 VOUT1 22
VOUT2 VOUT7
4 21
VIN2 VIN7
5 20
VDD GND R227
6 19 12k
LD RESET R224
7 18
CLK VDAREF 120k
8 17 Q38
DI DO
9 16
VIN3 VIN6 C219 DTC144EU
10 15 C216 0.01
VOUT3 VOUT6
11 14 0.047
VOUT4 VOUT5
12 13
VIN4 VIN5
C244 C236
0.01 0.01
IC10
M62363FP-650C
Q53
XP4601
TX: 0V C249 R320 R321 R336
Q22
Q21 RX: 4.88V 0.01 15k 10k 100k
R326
2SA1576 2SA1576 68k
C369 R319 4 3
0.033 68k
5 2
R260 R261
6 1
10k 47k R318 R327
TX: 4.21V TX: 4.97V 68k 100k
RX: 4.99V RX: 4.27V
R141
C162 C161 R139 C174 C373 C370 R323
0.01 4.7k 0.0068 0.0018 R324 R325 C372 C374
0.01 10k 22 10k
1.2k 68k 0.022 0.0022
S2
R348
1k
MAIN UNIT DC POWER SUPPLY: 7.2 V
MEASURMENT: TESTER (INNER RESISTANCE MORE THAN 50 k‰/V)
VCC
T5
TX: 1.99V
RX: 0V
R310 R305
47k 100 R23 R19
680 330 2.37V
2.46V
R304 C357
C363 R311
47k 220 0.001 0.96V 1.21V
0.001 C356 0.001 C29
0.001
0.74V R309 8.2k C33
R313 0.001
R303
1k 220
C367 1 6 R18 L8
1.83V
R302 0.5p 39k 0.1 H C27
2 5 18p
10k
0.74V
3 R22 R307
4 C358
L33 68k 390
0.001
LB-277 R308 D4
C295 C360 D37 R315 Q50 MA77
C368 47k
0.001 0.001 MA2S077 8.2k UMX5 C28
0.5p
12p
C31
5p
Q4
C365
R32 R314 C361 0.75p 2.77V 2SC4406
390
4.7k 0.001 0.73V Q6
D38 2SC4406
C47 L34
2.7 H C364 HVU350B
0.47 27p
0.71 V
PS5
R5
TX: 0V
R77 RX: 4.55V
100
C102
L21
56p
L20 47nH
C108 C107 C106
2.2 H
0.01 0.001 22p
TX: 0V
L29 C101 C100
RX: 0.74V C98
68nH 56p 39p
FI1 FL-298 FI3 FL-298 R262 5p
21.700 MHz 21.700 MHz 680
Q13
D12
R79 TX: 0V
3SK274 HVU350B
1k RX: 0.74V
L19
C110 56nH C97 C96 R66
5p R72 L36 R70 5p 100p 100k
R75 C105 C104 100k
10k 2.2 H
220 0.01 0.001 TX: 1.97V
RX: 1.61V
R67 C95
100k 0.001
T3
SW5V
VCC
PS5
R97 220k
C212 0.01 R98 330k
1 14 R114
I/O VDD R44 18k
2 13 C128
O/I CONT. A 10k C213 2.2 R107 150k
3 12 0.1
O/I CONT. D
4 11
I/O I/O
5 10 C214 0.033 R113 68k
CONT. B O/I 9
6 O/I R112
CONT. C 8 C131
7 I/O 1M R169 R170 R159
VEE 0.01 C136
39k 10k 100k
0.0056
IC4 BU4066BCFV
CLIN
SD
SW5V
CTCSS
CPU5
CTCC
VCC
VOLIN
CTCIN
VOLOUT
R103
12k
Q43
DTC144EU C195
C197 R148 56p
100k
0.1
X2 CR-663
9.200 MHz
3 2 1
R359 R102
10
1M
IC11
C193 R101
S-80942ANMP-DD6 1M C194
8p 15p
4 5
C144
C230 0.001 R226
0.027 1k
SCK
SO
NOIS
R232
1k
PLCK
R241 1M
R346 100k
R242 1M
R243 1M
VCC
T5
C20
L26
0.001
EXCCL3225U
C19 C14 C289 C21
L6 L5
TX: 4.06V 0.01 0.01 0.001 4.7
R13 27nH 21nH
R15 RX: 0V
33 L32
100
17.5nH
C15
150p
C26 R14
C24 R12
0.001 4.7k L7 C22 Q1
0.001 3.3k 68nH
TX: 3.62V 100p 2SK3476
W11
RX: 3.82V
R16 C25 Q2 C284 C285
R5
15 0.001 2SK3475 33p 18p
22
TX: 0.82V
R7
D3 RX: 0V
220 TX: 2.20V
MA77 TX: 4.30V
C13 RX: 0V
RX: 0V R341 R340
R357 0.001 33k 22k
R11 C23 R10
0.001 33 33k
3.3k
TX: 1.49V
TX: 3.65V
RX: 0V TX: 1.82V
R358 C298 C18 RX: 0V
Q3 RX: 0V
C17 33k 4.7 0.001
2SC5085 0.001
PS5
R61
R69
100 47 TX: 0V
R68
4.7k RX: 1.60V
C99 C90 TX: 0V TX: 0.833V
L18
0.001 0.001 RX: 4.55V
C94 68nH R222 C277 C79 L15
18k 5p 54nH
0.5p Q12 6p
3SK274
D11 C89
D9
HVU350B 0.001
HVU350B
D50 D8 D2 C52
R187 L16
R64 100k C80 MA728 MA77 MA77 15p
C92 C91 R57 C81 60nH
100k 1p
100p 2p C88 C87 R59 C138 R259 R252 100k 100p
0.001 0.01 120 0.001 10k 10k
TX: 0V TX: 0V
C93 R65 RX: 0.79V R58 100k RX: 1.76V
C82
0.001 100k 0.001
T2 TX: 0V, RX: 1.64V
T3
Q15 2SB1132 AF ON: 6.46V AF OFF: 0V
PS5
VCC
R115 120k
R120
47k
C135 270p
R178 6 5 4
R99 R122
R117 120k 39k
13 1.90V 2.7k
1.5k
14
12
1 2 3
IC3
C137 C145
NJM12902V 0.033 R145 C171
R100 C129 C139 R121 Q16 R123 10
470k 1 0.1
18k 1.5 1k XP6501 6.8k
VOLOUT
CLOUT
CLIN
CPU5
CTCC
VCC
TONE
CTCIN
LEDC ON: 4.86V
DIUD DIUD
REMO LEDC OFF: 0V
R182 TEMP
NTCCM20124AG473JCT
R181
C232
100k 0.1
DICK 1 75
PB0/AN0 P97/SEG40
2 74
AVSS P96/SEG39
3 73
TEST P95/SEG38
4 72
X2 P94/SEG37
5 71
X1 P93/SEG36
6 70
VSS P92/SEG35
XIN 7 P91/SEG34 69
OSC1
XOUT 8 P90/SEG33 68
OSC2
RESET 9 P87/SEG32 67
RES 66
10 P86/SEG31
11 NMI 65
CSHIFT P20/IRQ4/ADTRG P85/SEG30
SCK 12 64
P21/SCK1 IC8 P84/SEG29
SI 13 63
P22/SI1 HD6433876B49H P83/SEG28
SO 14 62
P23/SO1 P82/SEG27
15 61
P24/SCK3 P81/SEG26
16 60
P25/RXD P80/SEG25
CLOUT 17 59
P26/TXD P77/SEG24
CCS 18 58
P27/IRQ0 P76/SEG23
NOIS 19 P75/SEG22 57
P17/IRQ3/TMIF
CIRQ 20 P74/SEG21 56
P16/IRQ2 55
S1 21 P73/SEG20
22 P15/IRQ1 54
S2 P14 P72/SEG19
23 53
OPT1 P13/TMIG P71/SEG18
OPT2 24 52
P12/TMOFH P70/SEG17
OPT3 25 51
P11/TMOFL P67/SEG16
PLCK
R350
R349 100k
1M
[USA] only
CPU5
R235 2.2M
CONT
R194
56k R195 56k
R193 R196 C199
56k 82k 0.1
MP5
R160
150
C288 C204 L24
2.7 H
0.001 0.001
C390 C281 L4 D1 C8 L2 L1
27p 0.001 50nH MA77 0.001 50nH 60nH
R2
R3 C205
D33 2.2k C4 6p C2 2.5p
2.2k RB706F-40 0.001
D32 C5 C3 C1
R1
C287 C278 RB706F-40 22p 27p 12p 82k
22p 22p
C251 R162 R161
0.001 C252
22k 22k 0.001
C10
0.001
PS5
IC3
W7
NJM12902V
4
V+
C179
0.01
Q37
11 GND
R210 DTA144EU
3.9k
R52 C73 C164
100k
2 0.1 R53 10k C243 0.001
1 0.001
C76
3
18p
IC3
R163
C75 R251 R54
NJM12902V 2.2k
0.1 330k 180k
TX: 1.97V
RX: 1.61V
T3
SW5V
AFOUT
1 10
NC POUT
2 9
VCC PWGND C153
3 8
4 NC PREGND 100
7 R128
5 VIN PHASE 6 10
RIPPLE NF
R127
33
IC5 TA7368F C151 C152 C169 C168 C167
C149 47p
C150 0.047 0.001 0.001 47p D27
0.022
10 RB706F-40
R126
47k Q31
C299
470p DTC144TU
C399
0.0033
R174 15k CLOUT
CLIN
LEDC ON: 3.18V
DS2 DS3
LNJ310M6RA LNJ310M6RA
VCC
Q25 R144
D34 C163
LEDC 22k 0.001
2SC4116 MA8056M
R204
3.3k R205 R155
C245 1.5k 100
0.01 S3
R132
IC7 470
OPT
BR24C16FV-E2
SEG12
MIC
SEG11
8 1
SEG10 VCC A0
7 2 C165
SEG9 R225 WP A1 C166 EP5
R228 6 3 0.001
SEG8 100k SCL A2 0.001
15k 5 4
SEG7 SDA VSS
SEG6
SEG5
SEG4
SEG3
SEG2
TXC
SEG1 1 COM4
PSSCO 2 COM3
3
PSVCO PSVCO SEG1 COM2
SEG2 4
PLST PLST COM1
SEG3 5
OPV1 OPV1 SEG1
SEG4 6
ESDA SEG2
SEG5 7
ESCK SEG3
R237 SEG6 8
SEG4
1k AFON SEG7 9
SEG5
SEG8 10
SEG6
SEG9 11
SEG7
SEG10 12
SEG8
SEG11 13 SEG9
C296 SEG12 14 SEG10
R246 R245 15
0.001 R17 SEG13 SEG11
100k 100k R236 C297 SEG14 16
1k 1k SEG12 DS1
0.001 SEG15 17
SEG13 TTR5515 UPFDHW
SEG16 18
SEG14
SEG17 19
MMUT MMUT SEG15
SEG18 20
RMUT SEG16
SEG19 21
SEG17
SEG20 22
UNLK SEG18
SEG21 23
SEG19
SEG22 24 SEG20
SEG23 25 SEG21
26
SEG24 SEG22
27
COM1 COM1
COM2 28
COM2
COM3 29
COM3
COM4 30
COM4
ANT
CHASSIS UNIT
SP1
W5
J6
1 2
2
1
EXT. SPEAKER
J3
MC1
EXT. MIC
J2