Main Unit - Icom IC-M302 Service Manual

11-2 MAIN UNIT

R8
R5
IC2
NJM13403V
R58 3
10 k
1
WXDEC
2
R71
47
IC3 NJM2211M C99
0.033
C97
1 14
0.047 V+ CAP
R76
2 13
15 k
IN CAP
3 12
LOCK R
11 C100
4
GND LOOP
0.1
5 10
Q REF
6 9
Q NC
7 8
DATA FSK
R74 C102
100 k 0.01
R73
47 k
Q11 2SC4116 BL
5V
WXDEC 4.30V
C112
0.001
R83
560
R85
220
R86
100
R5
Q12
D11
DTC144EU
MA77
R87
33 k
5V
5V
5V
R5
R212 R211
R8
10 1 k
CP1
J1
30FLT–SM1–TB
SP+ SP+
1
SP– SP–
2
BEEP BEEP
3
BPLVL BPLVL
4
SQLV SQLV
5
HVS HVS
6
PSTB
7
5V 5V PCK
8
5V 5V PDATA
9
DSCENC DSCENC
R214 330
10
WXDEC WXDEC UNLK
11
RMUTE RMUTE
12
DSCDEC DSCDEC
13
PTTC PTTC
14
RCV RCV
15
PTT PTT
16
SEND SEND
17
KEYM KEYM
18
TMUTE TMUTE
19
SQL SQL R5
20
TXDET TXDET
21
SQLC SQLC
SP–
22
H/L H/L
23
BPF BPF HVS
24
PSTB PSTB
25
PCK PCK
26
PDATA PDATA R8
R8
27
UNLK UNLK
28
29
R: 7.55V
30
R8
R5
R41
68 k
R56 R55 C82 R42
10 k 10 k 0.1 470
R44 C67
390 100 P
X1
CDB450C24
R5
R43
1 k
IC1
TA31136FN
R: 4.27V
R: 3.58V
Q5
2SC4116 BL C91 C90
0.022 0.022 R48 C73
48 k 220P
R68
R51
ERJ3GE-JPW
R62
1.5 k
15 k
FI3
ALFY450E
C74
O I
220P
R96 680
T5
MP1
R102
100
5V
L21 L22
C125
2.7 H
80 nH 1.5 P
C128
0.5 P
Q15
2SC4215 O
Q13
2SC4226 R25
C135
6 P
2SC4215 O
Q14
2SC4226 R25
C127
1.5 P
5V
C246 R204
0.001 ERJ3GE–JPW
4.75V
L36
0.1 H
C243
C241
22 P
5 P
IC8 UPD3140GS–E1
1 20
Q26
VCC1 GND1
2 19
2SC4215 O
IN1 IN2
3 18
ENB VCC2
4 17
CLK XB
5 16
DATA XI
6 15
T1 XO
7 14
LOK GND2
8 13
X2
CP1 CP2
CR–768
9 12
FI1 FI2
10 11
FO1 FO2
R184
47 k
R5 5V 5V
SP–
HVS
Q35
Q33 Q31
R5
2SB1132 R 2SA1577 Q 2SA1577 Q
R5 T5
Q36
2SC4116 BL
Q32
R224
DTC144EU
2.2 k
Q34
R222
2.2 k
DTC144EU
11 - 2
R8
R5
R: 2.30V R: 7.25V
C60
0.01
Q2
3SK131 L
FI2 FI1
FL–363 FL–363
Q4
2SC4215 O
R: 2.35V
R5
R38 C44 L13 L12
2.2 k 0.001 68 nH 68 nH
T5
R: 2.07V
4.02V T: 4.71
T: 2.09
C138
22 P D17 R107
MA77 39
C140 C149
22 P
47 P
Q17
Q16
2SC4215 O
5V 5V
R188
47
5V
R: 2.12V
5V
IC2
NJM13403V
4
V+
GND
IC2
11
NJM13403 V R179 R178 R177 R174 10
22 k NJM13403V
68 k 68 k 68 k
12 8
14 9 7
13 IC2
R171
C233
NJM13403V
10 k
0.0039
R172
1 M
5V
SP–
HVS
5V
IC9 TA7805 S
5V 2 1 HVS
O I
G
R21
100
C34 L9 L8 C24
C30 C29
LS–440 LS–440
4 P 2 P 0.5 P 3 P
R: 0.23V
R: 3.95V
R5
T5
R130
IC4
68
S–AV35
T: 4.72V
Hi Pow: 3.90V
Low Pow: 1.50V
C156
22 P
Q23 2SA1577 Q
C152
5V
3 P
Q18
2SC4226 R25
HV
T5 T5
5V HV
Q21
FMW1
R138
10 k
R140
Q22
10 k
Q20 DTC144EU R137
DTC114EU
100
5V
Q25
DTC144EU
R154 R153
1.2 k 15 k
IC2
5
IC7
C223 TC4W66F
0.0022
6
1 8
C220 C216
2 7
R167 0.22
3 6
2.2 k
C224
4 5
68 P
R168 R165
220 k 2.7 k
SP–
MIC
HVS
VOL2
VOL1
HVS
L7
LS–440
R: 3.22V
C22
10 P
L6 C13
C15
Q1 LS–440
5 P 10 P
3SK131 L
R9
100 k
R4
R: 0.50V
100 k
R5
H/L
L3
LA–243
L32
LW–25
L1
L31 D1 C6 L2
LA–243
LA–253 XB15A308 0.001 LA–243 CP3
to the antenna
connector
C4
4 P
R133
100 k
NOTES :
Voltage line
Common line
TX line
RX line
D26
DA204K
CP4
HV
CP5
IC6
LA4425A
5
1 R151
1
100 J2
4 PTT 1
1
B5B–PH–K–S
2 MICG 2
C213
2
3
470 MIC
3 3
GND 4
4
KEYM 5
5
C214
0.1
MIC
KEYM
W1
GND
1 OPC–1264
SQLV SQLV
2
SQLI SQLI
3
HV HV
4
GND
5
VOL2
6
VOL1
7
HVS
8