Icom IC-M502 Service Manual page 40

MAIN (2)
VCC
8V
+5V
T8
R8
DEMOD
BUS LINE
C308
IC20
CP5
0.1
R263 NJM2125F
5
10k
R266 R268
1
SQLI 1k 1k
4 W6 W5
3
C307 2
R264 R265 R267
C309
0.22
10k 10k 10k
0.22
R8
C27 L2
C26
LS-440
0.001 0.01
D35
L33
1SV214
10µ
C22 C21
2p 0.5p
C28 L4 C17
L3 C16
10p LS-440
LS-440 0.001 3p
c
C24
C18
C13
15p
15p 1.5p
R16 C14
15p
10k C332
1p R9
100 C12
470p
R12 R11 R10
220k 220k 220k
D4 D3 D36 D2
1SV214 1SV214 1SV214 1SV214
MAIN (1)
R288 C25 C19 C15
10k 0.001 0.001 0.001
C330 3.48V
0.001
R297
1k
d R88 L22 D16
VCC
VCC 150 LW-25 XB15A308
T8
T8
IC3
SC-1302
C132
0.001
L21
LA-243
1 2 3 4
R81 R82
VGG
2.2k 2.2k
C127 C128
24p 18p
C129 C130
0.001 0.001
D14
Q16 HSM88ASR
FMW1
PI
D15
Q14 2 1
HSM88ASR
2SB1143 R76
C124
47k
1
R77
5.6k
Q15 3 4 5 R84 Q17
DTC144EU RV-143 DTC144EU
R79 10k
R83
10k
R80 R85 R86
150 22k 1M
HVS
HVS
HV
HV
+5V
+5V
MAIN BUS
OPT BUS
SMIC
SMIC
SAFO
SAFO
+5V
+5V
MOD R175
SP- R176 C236 C235
8.2k
47 0.1 10
SP+
2.68V
R165
150k
IC13B
R169 NJM4558M
NTCCM16084BH R168 R167 R166
5
10k 82k 82k
7
R171 6
C282
12k C226
0.1
0.0039
R172
RV-110
R170
C228
C279 C229 C227
12k
0.0027
0.001 47p 82p
+5V
SP-
SP+
C7
R7
0.001
100
R8
470
C10 C9
0.001 0.001
R5 R3
33k
10k
R287 1
C5 L1
2p LS-440
Q2
C4
3SK292
R4
15p
22k
C3
R6 0.3p
C11 C8
47k
0.001 470p
R2
220k
RCV
C2
10p
C6
HV
0.001 HVS
D33 VCC
8V
1SS375
+5V
+5V
R8
L26 D17
LA-243 XB15A308
Q20
2SB1132
C141 C142 L27 C143
R112 R114
33p 27p LA-238 100p
10k 10k
C133
L23 L24 L25 C166
0.001
LA-149 LA-243 LA-253 0.001
ANT
R113 R115
2.2k 2.2k
C139
4p
C137
C134 C136 5p C138
8p 12p 27p
Q21
Q23
DTC144EU
DTC144EU
R116 47
+5V
R117 1k
R8
R120 R122
Q18
560k 2.7k
2SC4116
R87
R118 C183 C184
100k
8.2k 0.027 0.027
C131
R119 8.2k
0.001
R121
C182
180k
0.22
C246 0.22
HVS
HV
+5V
SMIC
SAFO
5V
2.68V
VBIAS
R156
1M
R162 R160
82k 1M
1 VDD 14
I/O
2 CONT.A 13
O/I
3 CONT.D 12
O/I
4 I/O 11
I/O
5 O/I 10
CONT.B
IC13A
8 6 O/I 9
CONT.C
NJM4558M C223
3 7 I/O 8
R161 0.1 VEE
1
12k
2
R164 C219 C319
0.1 0.1 IC12
100k
4
BU4066BCF
C225
0.001
C224
22p R157
56
R163
1M
C239
1
4.95V
R247
D22 22k IC14
C240
LA4425A
DA204U
R177 R179 1
1 5
15k 1M
2
C238 C241
0.01 0.001
R180 3
Q31
22k
DTC144EU
R178
1.2k
A5V
C158
R90
0.1
47
R95 IC4B
R102
R103 R104
100k NJM4558M
10k 10k 10k
DEMOD 5
7
C148
6
C153
0.1 C156
R96
0.012
470p
100k
C154 C155
0.033 0.033
R105
C159
470k
0.22
C152
R101 C157
C149 C150 C151 0.01
470k 8 0.047
0.01 0.01 0.01
3
1
C160
2
R97 R98 R99 R100
0.1
10k 8.2k 1.5k 470k
4
IC4A
NJM4558M
HV
VCC
IC8
TA7808S
C171 C172 C173 C174
10 0.1 0.1 10
Q22
2SB1132
4.95V
8.04V
RL1
IC9
C167
FTR-F3AA012E
TA7805F
0.001
C176 C177
0.1 0.1
C326
0.01
C178
C175
0.01
10
VCC
5V
Q26 VOL1
2SJ144 VBIAS
C192 C195
Q25 R128
R133
C194 0.01
2SC4116 470k 1
R130 100k IC10
R124 R125 C188 0.1
100k BU4066BCF
33k 10
33k C190
1
0.0039 I/O
2
C185 C193 O/I
Q27 3
0.0022 1 O/I
C189 2SJ144 4
Q24 I/O
1
5
2SC4116
R129 CONT.B
6
Q28
CONT.C
470k
R131 2SK1069 7
R123 R126 R127
C186 C197 VEE
330 2.2k 100k 100k
820p 0.001
C191
C196
0.0039
0.1 R134
1k
MAIN BUS
OPT BUS
SMIC
SAFO
D37
5V
R294 DAP202U
100k
R155 R154
C334
1M 1M
0.1
C333 1
C217
R153 R148
0.01
47k
18k
R296 R295
8
Q29 IC11A
R152
R151 10k 10k
DTC144EU NJM4558M 3
1M
1M
1
2
R150
R147 C213 47p
18k
4 C214
1.2k
0.033
C215
470p
C218
0.1 MICDSC
R149
39k
Vcc
R298
RL2
FTR-F3AA012E C337 10k
C242
C243
0.1 10
470 D23
1SS355
R299
R260
4 18k AF 10k
Q32 AF1
C244 2SC4116 Q47
R181
470 4.7 2SC3326
R300
10k
C245
0.1
R301 R302 R303
330 330 330
ANT W2
CHASSIS
J2
C1
18p
4.66V
C317
10
IC5
C161
NJM2211M
0.033
1 CAP 14
V+
R109
2 CAP 13
IN 15k
3 R 12
LOCK
4 LOOP 11 R110
C162 0.1
GND
RV-148
CP4 5 REF 10 R108
Q
6 NC 9 39k
Q
7 8
DATA FSK
R106 R107 C164
C163
47k 100k 0.01
0.0022
IC6
TC7W14FU
R111
8 1
330
7 2
6 3
5 4
C165
470p
13.8V
J1
HV HV
4
HV HV
3
GND GND
2
GND GND
1
C327
0.001
W1
VOL1
1 1
VOL2
2 2
GND
3 3
R135
R136
1M 1M
C202
VDD 14 MMIC
47p
CONT.A 13
C198
CONT.D 12
0.1
I/O 11
to LOGIC
O/I 10
C199
O/I 9
0.1
SMIC
I/O 8
C200
0.1
Q46
R280
2SJ144
10k
MICAF
C328
R281 R286 R284 R137
R285
820 100k 100k 0.1 2.7k
100k
VBIAS
R144 R142
IC11B
18k 1M
NJM4558M
+5V
5 CK SCK
R143
7 GND
15k
6 DATA SDATA
OPTIN OPTIN
C212
OPSTB OPSTB
0.22
SCON SCON
MICI
GND
R145 C203 0.1
1M DETI
GND
MICO
GND
C204 0.1
DETO
VOL2
VCC
C205
MICO
0.1
MICI
DETO
DETI
5V
+5V
AF1
D38 R141 1k
PTT PTT
DAP202U
HANG
RMUTM R140 100
HANG MICE
MIC
PTTM
HANDSET GND
AF2
SPMIC
C209 C208 C207
0.01 470p 0.001
C206
D21 D20
47p
DA204U DA204U
C321
AF
47p
AFG
C210
470p
11 - 3
PWR-CORD BOARD
HV
C2
GND
0.001
C1
0.001
VOL UNIT
R1
TP96N97-15F-
10KA-2345
J1
VOL1
1
VOL2
2
GND
3
W2
GND
J6
Optional
unit
UT-98
or
UT-112
J7
1
2
3
4
SP/MIC
5
6
7
8
J8
1
2 EXT SP