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SCHEMATIC DIAGRAM-7
E
MAIN(TUNER) CIRCUIT
FM FRONT END (ENV17290GIY)
JK101
22P
FM ANT
1
(75 )
15P
2
3
4
5
AM ANT
L102
EXT
0.39 H
LOOP
R110
1K
R114
5.6K
R152
0
FM/AM
F=7.2MHz
FM/AM
F=7.2MHz
V
FM
9.3V
2.6V
87.5MHz
108MHz
2SK238
RF AMP
22
8P
2SK360
FM OSC
8P
Z101
6
1
A
6
Ca
5
2
5
4
3
4
A
AM ANT
AM OSC
X103
C112
(7.2MHz)
0.01
2.6V
20
19
18
1.4V
P- P
1.3V
P- P
1
2
2.5V
0.6V
R130
10K
R138
3.3K
V
AM
A
6.8V
1.4V
F
F
522kHz
1629kHz
:POSITIVE VOLTAGE LINE
4P
100
330
2SC2996
BUFFER AMP
8P
33P
2P
2SC2996
BUFFER AMP
A
1
B
2
C
3
R151
D
R116
1K
(2.8V)
(0V)
(2.4V)
6.5V
0.8V
0.8V
5.2V
2.5V
0V
17
16
15
14
13
IC102
LC72131MDTRM
PLL FREQUENCY
SYNTHESIZER
3
4
5
6
7
8
0V
0V
5.2V
4.7V
4.3V
(0.2V)
(4.6V)
B
C
D
:FM SIGNAL LINE
:AM SIGNAL LINE
:FM OSC SIGNAL LINE
:AM OSC SIGNAL LINE
2SC2620
FM MIXER
7
6
150
15P
8
82
R111
390
A
R128
82
B
R129
27K
C
C124
100P
D
(0V)
4.7V
0V
12
11
9
10
0V
0V
(14.6V)
E
R132
10K
R133
1K
F
R103
100
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