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SA-AK52
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Main/Tuner Circuit - Panasonic SA-AK52 Service Manual
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Service manual
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SCHEMATIC DIAGRAM - 3
MAIN/TUNER CIRCUIT
Z120 (RAL0029)
JK101
5.6P
FM EXT
1
ANT
1
75
G
2
GND
2
AM LOOP
ANT
3
3
4
4
AM EXT
ANT
5
R157
1K
L104
C159
4.7P
R171
10K
C152
22P
R156
10K
R158
1K
Q154
R139
C135
5.6K
0.01
R114
5.6K
C110
0.01
: FM SIGNAL LINE
: +B SIGNAL LINE
: FM OSC SIGNAL LINE
2SC2786M
2SK544
FM MIXER
RF AMP
2.2P
D
S
0.001
0.001
220
560K
2SC1675L1L2
BUFFER AMP
LOCAL OSC
4.7P
680K
2.2P
C154
0.047
Z151
2.5V
2.6V
AM ANT COIL
(2.1V)
(2.1V)
<2.5V>
<2.4V>
Q152
8.1V
(8.2V)
<8.2V>
AM OSC
R152
33K
R166
Q151-Q154
100K
2SA1309ARTA
SWITCHING
C156
C153
18P
2700P
D151
DA204KT146
Z152
2.6V
2.6V
10
13
(2.1V)
(2.1V)
9
<2.4V>
<2.4V>
1
2V
11
(1.6V)
<1.9V>
2
8
14
R154
12
68K
3
7
15
6
4
5
16
C160
0.01
R165
4.7K
0V
(0V)
<0V>
Q156
0.1V
(0.1V)
0V
<0.1V>
(0V)
<0V>
Q107
DTC143XKA146
MUTING
37
: AM SIGNAL LINE
: AM OSC SIGNAL LINE
C103
0.01
C104
R106
CF201
0.001
0.47u
470K
1
3
7
R105
470
0V
2
(0V)
<0.7V>
R103
270
6
C102
C101
16V10
0.01
10P
8
5.4V
5.3V
(5.8V)
(5.8V)
<5.4V>
<5.4V>
Q151
8.1V
(8.2V)
<8.2V>
R151
15K
R161
R155
10K
C155
10K
0.047
5.4V
5.3V
(5.8V)
(5.8V)
21
<5.4V>
<5.4V>
Q153
5.3V
4.7V
(5.8V)
5.9V
(5.1V)
<5.4V>
<4.8V>
20
(6.4V)
Q157
<6V>
5.3V
(5.8V)
R164
R153
<5.4V>
22K
15K
19
18
17
Q155-Q157,Q159
2SC2412KT96R
SWITCHING
0V
0.7V
(0.1V)
(0.7V)
<0.1V>
<0.7V>
Q159
R168
R169
15K
0V
22K
(0V)
0V
<0V>
(0.2V)
<0V>
Q155
Q158
0.1V
(0V)
DTC114EKA146
0V
<0.1V>
(0V)
SWITCHING
<0V>
3.8V
(4.3V)
<4V>
Q107
0.1V
R108
(0.1V)
C105
<0.1V>
27K
6V47
0V
(0V)
<0V>
C128
0.001
SA-AK52
R107
330
0V
(0V)
<11.5V>
Q101
0V
Q101
(0V)
<0V>
2SC2058SPTA
FM IF AMP
C136
R172
0.001
180K
R162
2.2K
0V
Q158
(0V)
<0V>
8.1V
(8.2V)
C158
<8.2V>
0V
0.001
(0V)
<0V>
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