Panasonic SA-AK58 Service Manual page 120

SCHEMATIC DIAGRAM-3
B
MAIN(TUNER) CIRCUIT
P
FM FRONT END(Z120) CIRCUIT
JK101
FM ANT
1
75
GND
2
3
4
5
AM ANT
EXT
LOOP
R110
1K
R114
5.6K
R152
0
:POSITIVE VOLTAGE LINE
Q1A
2SK544F-AC
RF AMP
C1A
D
5.6P
G
S
R3
220
R4
100K
L102
1 H
Z101
AM ANT AM OSC
X103
C112
(7.2MHz)
0.01
2.6V 1.3V
2.6V 3V
20 19 18
1 2 3
2.6V 0.6V 0V
2.6V 0.6V
0V
R130
10K
R138
3.3K
A B
:FM SIGNAL LINE
:FM OSC SIGNAL LINE
Q2
2SC2786MTA
FM MIXER
C3
2.2P
R8
680K
R11
680K
C7
4.7P
C8
3.3P
Q3
Q4
2SC2787FL1TA
2SC2787FL1TA
LOCAL OSC
BUFFER AMP
A
B
C
D
R116
1K
0.9V 0.9V 5.2V 0V 2.5V 0V
0.9V 0.9V 5.2V 2.5V 0V 0V
17 16 15 14 13 12
IC102
LC72131MDTRM
PLL FREQUENCY
SYNTHESIZER
4 5 6 7 8 9
0V 5.2V 4.7V 4.3V 0V
0V 5.2V 0.2V 4.6V 0V
C D
:AM SIGNAL LINE
:AM OSC SIGNAL LINE
L2
0.47 H
7
R103
270
6
C10
18P
8
R111
390
A
R128
82
B
R129
27K
C
C124
100P
D
0V
0V
11
10
0V
14.4V
E
R132
10K
R133
1K
F