SCHEMATIC DIAGRAM-4
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
FM IF IN
AM MIX OUT
REG
AM IF IN
GND
SD
ST
FM DET
Vcc
STRQ
FM/AM
MONO
OSC OUT
OSC
AFC
AM RF IN
AGC
AM OUT
DET
OUT
PILOT
IN
MPX IN
PILOT
OUT
Rch
Lch
Z102
1
2
3
4
6
1
2
3
CL
DO
DI
Lch OUT
CE
Rch OUT
+B(4)
SD
STEYE
+B(3)
A
B
C
D
A
B
B A
D
F
C E
R127
470
C122
50V1
R122
2.7K
C121
50V0.47
C123
50V1
R131
68
C149
0.1
C147
1000P
C148
0.01
R124
33
X102
C106
0.01
C126
1
C127
16V22
C129
6.3V100
R1
19
4.7K
C1
17
0.01
C141
50V1
R141
6.8K
R145
100K
C143
4700P
B
A
C144
4700P
R146
100K
R142
6.8K
C142
50V1
C1
18
0.01
C137 3300P
C131 150P
R123
68K
C138
0.01
C120
16V10
R121
22K
C139
25V4.7
R102
4.7K
C1
19 680P
C1
16
0.033
R143
22K
C1
15 25V4.7
R120 47K
C109
1000P
C1
14
50V3.3
R1
18
3.3K
A
D
B
C
R104
1K
C103
0.01
R107
330
C104
1000P
R105
470
CF201
R106
470K
1
3
2
CF202
1
3
2
IC101
LA1833NMNTLM
FM/AM IF AMP,
DET/AM OSC,MIX/FM MPX
Q106
KRA102MTA
POWER SUPPLY
(FM:ON)
7.3V
14.5V
A
11
10
9
8
7
6
5
4
3
2
1
GND
14.5V
R126
1K
R125
470
Q101
2SC2058SPTA
FM IF AMP
TO
MAIN(CONTROL)CIRCUIT( )
ON SCHEMATIC DIAGRAM-17
7.7V
14.8V
FM LINE
+B
14.8V
2.1V
2.1V
5.8V
6.1V
2.1V
2.1V
2.1V
2.1V
5.2V
5.2V
4.7V
6.1V
0V
1.2V
4.3V
3.6V
5.8V
4.7V
3.4V
0V
4.4V
4.7V
5.9V
2.4V
0.3V
0V
2.4V
2.1V
1.8V
1.8V
2.4V
2.1V
2V
6.1V
2.1V
0.7V
2.4V
1.8V
1.8V
2.1V
1.2V
2.1V
2.1V
2V
10.3V
0V
0V
0.7V
14.7V
2.8V
0V
14.8V
14.8V
:POSITIVE VOLTAGE LINE
:FM SIGNAL LINE
:AM SIGNAL LINE
:AM OSC SIGNAL LINE
5.3V
5.3V
14.7V