Icom IC-V8 Service Manual page 28

VCC
T5
R305
R23 R19
100
680 330
2.46V
R304 C357
220
0.001 0.96V 1.21V
C356 0.001 C29
0.001
C33
R309 8.2k
R303 0.001
220
1 6 R18 L8
1.83V
39k 0.1 H
2 5
0.74V
3 R22 R307
4
C358
68k
390
0.001
Q50
C368
C28
UMX5 0.5p
12p
C31
5p Q4
2.77V 2SC4406
0.73V Q6
2SC4406
TX: 0V
RX: 4.55V
C102
L21
56p
47nH
L20
6
2.2 H
L29 C101 C100
C98
68nH 56p 39p
5p
Q13
TX: 0V
3SK274
RX: 0.74V
L19
56nH
C97
R72 L36 R70
5p
R75 C105 C104 10k 100k
2.2 H
220 0.01 0.001 TX: 1.97V
RX: 1.61V
T3
SW5V
VCC
PS5
R97 220k
C212 0.01 R98 330k
R44
C128
10k
C213 2.2 R107 150k
0.1
C214 0.033 R113 68k
R112
C131 1M
R169 R170
0.01
39k 10k
CLIN
SD
R103
12k
Q43
DTC144EU C195
56p
X2 CR-663
9.200 MHz
C193 R101
DD6
8p 1M
C144
0.001
R226
1k
SCK
SO
NOIS
R232
1k
PLCK
R241 1M
R346 100k
R242 1M
R243 1M
TX: 4.06V
2.37V R13
R15 RX: 0V
33
100
C26 R14
C24
R12 L7
0.001 4.7k
0.001 C22
3.3k
68nH
TX: 3.62V 100p
W11
RX: 3.82V
C27 C25
R16
18p
15 0.001
TX: 0.82V
D3 RX: 0V
D4 TX: 4.30V
R308 MA77
MA77
47k RX: 0V
C23 R10
R11
3.3k 0.001 33
TX: 1.49V
RX: 0V TX: 1.82V
Q3
RX: 0V
2SC5085
PS5
R69 R61
R68 100 47
4.7k
C99 C90 TX: 0V
L18
0.001 0.001 RX: 4.55V
68nH R222
C94
0.5p 18k
Q12
3SK274
D12 D11 C89
HVU350B HVU350B 0.001
R187
R64
C96 R66 100k
C92 C91
100p 100k 100k
100p 2p
C88 C87 R59 C138 R259
0.001 0.01 120 0.001 10k
TX: 0V
R65 RX: 0.79V
R67 C95 C93
100k 0.001 0.001 100k
T2 TX: 0V, RX: 1.64V
PS5
R115 120k
C135 270p
R178
R114 R99
39k
18k R117 120k
13 1.90V
1.5k
14
12
IC3
C137
NJM12902V 0.033
R159 R100 C129
C136
100k 18k 1.5
0.0056
CPU5
CTCC
VCC
TONE
CTCIN
DIUD
DIUD
REMO
R182 TEMP
NTCCM20124AG473JCT
R181 C232
100k 0.1
DICK 1
R102 PB0/AN0
2
AVSS
10
3
TEST
4
X2
5
C194 X1
6
15p
VSS
XIN 7
OSC1
XOUT 8
OSC2
RESET 9
RES
10
NMI
CSHIFT 11
P20/IRQ4/ADTRG
12
SCK
P21/SCK1
SI 13
P22/SI1
SO 14
P23/SO1
15
P24/SCK3
16
P25/RXD
17
CLOUT
P26/TXD
CCS 18
P27/IRQ0
NOIS 19
P17/IRQ3/TMIF
CIRQ 20
P16/IRQ2
S1 21
P15/IRQ1
S2 22
P14
OPT1 23
P13/TMIG
OPT2 24
P12/TMOFH
OPT3 25
P11/TMOFL
PLCK
R350 R349 100k
1M [USA] only
CPU5
R235 2.2M
CONT
R194
56k
R195 56k
R193 R196 C199
56k 82k 0.1
VCC
T5
C20
L26
0.001
EXCCL3225U
C14 C289
C19 C21
L6 L5 0.001
0.01 0.01 4.7
27nH 21nH
L32
17.5nH
C15
150p
Q1
2SK3476
Q2
C284
C285
R5
33p
2SK3475 18p
22
R7
220
TX: 2.20V
C13 RX: 0V
R341 R340
R357 0.001 33k 22k
33k
TX: 3.65V
R358 C298 C18
RX: 0V
C17
33k 4.7 0.001
0.001
TX: 0V
RX: 1.60V
TX: 0.833V
C79
C277 L15
5p
6p 54nH
D9
HVU350B
D50 D8 D2 C52 C76
L16
C80 MA728 MA77 MA77 15p 18p
R57 C81 60nH
1p
100k 100p
R252
10k
TX: 0V
RX: 1.76V
C82 R58 100k
0.001
T3
Q15 2SB1132
AF ON: 6.46V AF OFF: 0V
VCC
R120
47k
6 5 4 R122
2.7k
1 2 3
C145
C171
R145 C139 Q16
R121 R123 10
0.1
470k 1
1k 6.8k
XP6501
VOLOUT
CLOUT
CLIN
LEDC ON: 4.86V
LEDC OFF: 0V
75
P97/SEG40
74
P96/SEG39
73
P95/SEG38
72
P94/SEG37
71
P93/SEG36
70
P92/SEG35
69
P91/SEG34
68
P90/SEG33
67
P87/SEG32
66
P86/SEG31
65
P85/SEG30
64
IC8
P84/SEG29
63
HD6433876B49H P83/SEG28
62
P82/SEG27
61
P81/SEG26
60
P80/SEG25
59
P77/SEG24
58
P76/SEG23
57
P75/SEG22
56
P74/SEG21
55
P73/SEG20
54
P72/SEG19
53
P71/SEG18
52
P70/SEG17
51
P67/SEG16
MP5
R160
150
C288 C204 L24
2.7 H
0.001 0.001
C390 C281 L4 D1 C8
0.001 50nH MA77 0.001
27p
R2 C205
R3
D33
2.2k 0.001
2.2k
RB706F-40
D32
C278 RB706F-40
C287
22p 22p
C251
R162
R161 C252
0.001
22k
22k 0.001
C10
0.001
PS5
IC3
W7
NJM12902V
4 V+
C179
0.01
Q37
11 GND
DTA144EU
R210
3.9k
R52
C73
100k
0.1 R53 10k C243
2
1 0.001
3
IC3
R163
NJM12902V C75 R251 R54
2.2k
0.1 330k 180k
TX: 1.97V
RX: 1.61V
T3
SW5V
1 10
NC POUT
2 9
VCC PWGND C153
3 8
NC PREGND 100
4 7 R128
VIN PHASE
5 6 10
RIPPLE NF
R127
33
IC5 TA7368F C151 C152
C149 47p
0.047
C150
0.022
10
R126
47k
C399
0.0033
LEDC ON: 3.18V
DS2 DS3
LNJ310M6RA LNJ310M6RA
VCC
Q25
LEDC
2SC4116
R204
3.3k
R205 R155
C245 1.5k 100
0.01
IC7
BR24C16FV-E2
SEG12
SEG11
8 1
VCC A0
SEG10
2
7
SEG9 WP A1
R225
R228 6 3
A2
SEG8 100k SCL
15k
5 4
SEG7 SDA VSS
SEG6
SEG5
SEG4
SEG3
SEG2 TXC
SEG1
PSSCO
SEG1
PSVCO PSVCO
SEG2
PLST PLST
SEG3
OPV1 OPV1
SEG4
ESDA
SEG5
ESCK
R237
SEG6
1k SEG7
AFON
SEG8
SEG9
SEG10
SEG11
SEG12
C296
R246 R245 0.001 SEG13
R17
R236 C297
100k 100k SEG14
1k
1k
0.001
SEG15
SEG16
SEG17
MMUT MMUT
SEG18
RMUT
SEG19
SEG20
UNLK
SEG21
SEG22
SEG23
SEG24
COM1
COM2
COM3
COM4
ANT
L2 L1
50nH 60nH
C2 2.5p
C4 6p
C5 C3 C1 R1
22p 27p 12p
82k
CHASSIS UNIT
SP1
W5
J6
1
2
2
C164 1
0.001
EXT. SPEAKER
J3
AFOUT
C169 C168 C167
0.001 0.001 47p D27
RB706F-40
Q31
C299
470p
DTC144TU
R174 15k CLOUT
CLIN
MC1
R144 C163
D34
22k 0.001
MA8056M
S3
EXT. MIC
R132
J2
470
OPT
MIC
C165
C166
EP5
0.001
0.001
1
COM4
2
COM3
3
COM2
4
COM1
5
SEG1
6
SEG2
7
SEG3
8
SEG4
9
SEG5
10
SEG6
11
SEG7
12
SEG8
13
SEG9
14
SEG10
15
SEG11
16
DS1
SEG12
17
TTR5515 UPFDHW
SEG13
18
SEG14
19
SEG15
20
SEG16
21
SEG17
22
SEG18
23
SEG19
24
SEG20
25
SEG21
26
SEG22
27
COM1
28
COM2
29
COM3
30
COM4