Icom VHF MARINE TRANSCEIVER IC-M501EURO, Service Manual

Page: 38 / 40

11 - 3
GND
VOL1
VOL2
R1
TP96N97-15F-
10KA-2345
GND
1
2
3
J1
to LOGIC
W2
1
2
CHASSIS
J2
C5
9p
C6
9p
CHASSIS
W2 ANT
GND
ANT
GND
C7
0.001
C9
0.001
L2
LS-440
R3
33k
R5
10k
R8
470
R7
100
C10
0.001 C21
0.5p
W5 W6
CP5
C26
0.01
C27
0.001
C22
2p
R263
10k
C307
0.22
1
3
2
4
5
IC20
NJM2125F
C308
0.1
R266
1k
R267
10k
R268
1k
C309
0.22
HVS
HV
D5V
T8
VCC
C23 2.5p
C24
15p
D4
1SV270
R12
220k
C25
0.001
L4
LS-440
1 2 3 4
IC3
SC-1302
R16
10k
C28
22p
L29
1
µ
R2
220k
C6
0.001
C8
470p
C11
0.001
C12
470p
C13
3p
C14
15p
D2
1SV270
R10
220k
C15
0.001
C16
3p
L3
LS-440
C18
15p
D3
1SV270
R11
220k
C19
0.001
C20 2.5p
R88
150
C132
0.001
L22
LW-25
D16
XB15A308
C141
33p
L26
LA-243
C142
27p
D17
XB15A308
L27
LA-238
C143
100p
Q2
3SK292
R9
100
R6
47k
R4
22k
C17
0.001
L1
LS-440
C4
15p
D1
1SV270
C5
2p
C3
0.5p
R89
82k
C9 47p C8 0.001 C5 470p C3 0.01
C7
47p
C1
0.01
C10
47p
ANT
PWR-CORD BOARD
VR UNIT
ANT UNIT
R80
150
C126 0.001
C127
24p
R81
2.2k
L21
LA-243
R82
2.2k
C128
18p
C129
0.001
C130
0.001
D14
HSM88ASR
D15
HSM88ASR
R83
10k
R84
RV-143
R85
22k
R86
1M
Q17
DTC144EU
C131
0.001
R87
100k
Q18
2SC4116
C133
0.001
L23
LA-149
L24
LA-243
L25
LA-253
C134
8p
C136
12p
C137
5p
C138
27p
C139
4p
C120 220 C121 47p
C122 470p C123 0.001
Q14
2SB1143 R76
47k
C124
1
Q15
DTC144EU
R77
5.6k
R78 3.3k
R79 10k
C125 0.1
3 4 5
1 2
Q16
FMW1
DEMOD
A5V
VCC A5V
T8
RCV
R8 DEMOD
A5V R8 DEMOD
8V
R90
47
C147
0.1
R102
10k
C153
0.012
R103
10k
C154
0.033
C155
0.033
R104
10k
C156
470p
R95
100k
R96
100k
C148
0.1
5
6
7
IC4B
M5218AFP
C157
0.047
C159
0.22
R105
470k
R106
47k
V+
1
IN
2
LOCK
3
GND
4
Q
5
Q
6
DATA
7
FSK
8
NC
9
REF
10
LOOP
11
R
12
CAP
13
CAP
14
IC5
NJM2211M
C161
0.033
C162 0.1
R107
100k
C163
0.0022
R108
39k
R109
15k
C164
0.01
R110
RV-148
C158
0.1
C317
10
CP4
Q20
2SB1132
R112
10k
C166
0.001
R113
2.2k
Q21
DTC144EU
Q22
2SB1132
R114
10k
C167
0.001
R115
2.2k
Q23
DTC114EU C168
10
C169
0.1
IC7
TA78L05F
C170
0.1
C171
10
C172
0.1
IC8
TA7808S
C175
10
C176
0.1
IC9
TA7805F
R116 47
8V
R8
VCC
D5V
A5V
A5V
HV
HVS
VCC
5V
C173
0.1
C174
10
C177
0.1
D18 1SS355
RL1
FTR-F3AA012E
C179 1000
C178
0.01
D19 DSA3A1
HV
VCC
1
2
3
4
HV
J1
HV
HV
HV
GND
GND
C181
0.001
C180
0.01
C327
47p
C326
47p
C324 47p C325 47p
GND
1
2
3 1
2
3
W1
GND
VOL1
HV
C201
47p
C202
47p
VOL2
VOL1
VBIAS
INCOM
MMIC
SMIC
MICAF
C194
0.1
R132 100k
R133
100k
Q28
2SK1069
C196
0.1 R134
1k
C197
0.1
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
IC10
BU4066BCF
R135
1M
R136
1M
R137
2.7k
C198
0.1
C199
0.1
C200
0.1
C195
0.01
C192
1
C193
1
R280
10k
R281
820
OPT BUS
MAIN BUS
SAFO
SMIC
R117 1k
C182
0.22
C183
0.027
C184
0.027
R119 8.2k
R120
560k
R121
180k
R122
2.7k
Q24
2SC4116
R123
330
R124
33k
R125
33k
C185
0.0022
C186
820p
Q25
2SC4116
R126
2.2k
R127
100k
Q26
2SJ144
R128
470k
C190
0.0039
Q27
2SJ144
R129
470k
C191
0.0039
R130
100k
R131
100k
R154
1M
R155
1M
C189
1
C188
10
R8
5V
SMIC
SAFO
C160
0.1
1
2
3
4
5
6
7
8
IC6
TC7W14FU
[HOL], [FRG] only
R111
330
C165
470p
R118
8.2k
DSC
STRU
R98
8.2k
C150
0.01
R99
1.5k
C151
0.01
R100
470k
R101
470k
3
2
1
4
8
IC4A
M5218AFP
R175
8.2k
C235
10
C236
0.1
R176
47
C237
0.001
C246 0.22
C149
0.01
R97
10k
C152
0.1
DSDEC
A5V
SMIC
SAFO
C282
0.1
C279
0.001
C229
47p
3
2
1
4
8 IC13A
M5218AFP
R164
82k
R165
150k
C225
0.001
R166
82k
C226
0.0033
R167
82k
C227
68p
R168
10k
C228
0.0027
R169
NTCCM16084BH
R170
12k
R171
12k
C230
0.1
R173 18k
R174 33k
C232 10
C233 0.1 C234 0.01
5
6
7
IC13B
M5218AFP
C231 0.01
R172
RV-110
VBIAS
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
IC12
BU4066BCF
R156
1M
C220
0.1
Q30
2SC4116
R157
2.7k
R158
22k
R159
33k
C222
0.1
R160
1M
C223
0.1
R161
12k
R162
82k
C224
22p
R163
1M
C221
0.01
C239
1
C219
0.1
C319
0.1
BEEPM BPLVLM
R147
1.2k
R148
18k
3
2
1
4
8 IC11A
M5218AFP
C215
220p
R149
68k
R150
18k
C216
0.1
R151
1M
R152
1M
Q29
DTC144EU
R153
47k
C218
0.1
C217
0.01
MICDSC
VOL2
VCC VOL2
VCC
VBIAS
R138
1k
R139
1k
R142
1M
C212
0.22
R143
33k
R144
18k
5
6
7
IC11B
M5218AFP
C213 47p
R145
470k
C214
0.033
OPTIN
OPSTB
SCON
CK
DATA
+5V
SCK
GND
SDATA
OPTIN
OPSTB
SCON
MICI
GND
DETI
GND
MICO
GND
DETO
OPTION
UT-98
or
UT-112
SP/MIC
J6
C203 0.1
C204 0.1
C205
0.1
PTT
HANG
MIC
GND
AF2
AF
AFG
EXT SP
MICE
AF1
SPMIC
HANDSET
C206
47p
C210
470p
1
2
3
4
5
6
7
8
J7
1
2
J8
C321
47p
R140 1k
C207
0.01
R141 1k
C208
470p
C209
0.01
D20
DA204U
D21
DA204U
PTT
HANG
C242
0.1
C243
1000
C244
1000
R181
4.7
C245
0.1
R260
18k
RL2
FTR-B3GA4.5Z
D23
1SS355
Q32
2SC4116
AF1
AF
D22
DA204U
Q31
DTC144EU
R177
15k
R178
1.2k
C238
0.01
R179
1M
R180
22k
C241
0.001
1
2
3
4
5
IC14
LA4425A
C240
1
R247
22k
MOD
SQL
/TMUT HI/LO TXDET
WXDEC
SEND D5V HV HVS
RCV
RMUTM RMUTS SMUTE PTTS PTTM MMUTE MICAF
DETI
SP
DETO MICI MICO
DETI
DETO
MICI
MICO
GND
GND
GND
ANT
MAIN(1)
R264
10k
R265
10k
C2
8p
C320
0.001
R282
39
D33
1SS375 2.42V
4.66V
4.95V
8.04V
13.8V
2.68V
2.68V
4.95V
0.24V
MAIN(2)
BUS LINE
SQLI
R8
RF
LOCK
VCC
T8
VGG
PI
HVS
HV
D5V
MAIN BUS
OPT BUS
SMIC
SAFO
A5V
MOD
SP-
SP+
DSCMOD
DEMOD
R8
T8
A5V
8V
VCC