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Panasonic Manuals
Stereo System
SAAK18 - MINI HES W/CD-PLAYER
Service manual
Main/Tuner Circuit - Panasonic SA-AK18 Service Manual
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:
Service manual
(120 pages)
,
Wiring diagrams
(40 pages)
,
Operating instructions manual
(32 pages)
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SA-AK18
SCHEMATIC DIAGRAM-3
JK101
FM EXT ANT
1
75
2
GND
AM LOOP
ANT
3
4
AM EXT
ANT
: +B
: FM Signal Line
: FM OSC Signal Line
MAIN/TUNER CIRCUIT
TUNER PACK CIRCUIT
Q2
Q1
2SC2786MTA
2SK544F-AC
5.6P
2.2P
RF AMP
FM MIXER
1
2
0.001
Q1
3
220
4
100K
560K
5
4.7P
Q3
Q3
2SC2787FL1TA
LOCAL OSC
Q152
R171
2SA1309ARTA
10K
SWITCHING
R157
1K
Q152
Z151 RLA3Z002-C
[2.5V]
[2.6V]
(2.1V)
(2.1V)
SW2
ANT
<2.4V>
1
4
<2.5V>
5
[8.1V]
(8.2V)
<8.2V>
2
R152
33K
7
3
C152
22P
D151
DA204KT146
R156
Q154
10K
2SA1309ARTA
SWITCHING
C153
R158
18P
1K
Q154
Z152 RLA5Z002-C
[2.6V]
(2.1V)
1
<2.4V>
9
[2.6V]
10
(2.1V)
<2.4V>
[2V]
(1.6V)
<1.9V>
2
8
R154
68K
SW1 ANT
12
MW ANT
3
7
R139
68K
6
C135
0.01
4
5
R114
5.6K
C160
0.01
[0V]
[0V]
(0V)
C110
<0V>
(0V)
0.01
<0V>
[0.1V]
Q156
(0.1V)
<0.1V>
R165
4.7K
Q155,Q156
2SC2412KT96R
SWITCHING
: AM Signal Line
: AM OSC Signal Line
(FOR GC ONLY)
[0V]
Q101
(0V)
2SC2058SPTA
<0.7V>
FM IF AMP
C104
CF201
0.47u
1000P
Q2
1
3
7
R105
470
0.001
2
2
R103
270
6
C101
C102
0.01
16V10
10P
680K
8
2.2P
Q4
Q4
2SC2787FL1TA
BUFFER AMP
Q151
C154
C136
2SA1309ARTA
0.047
1000P
SWITCHING
[5.4V]
SW2
OSC
(5.8V)
9
10
<5.4V>
[8.1V]
(8.2V)
6
<8.2V>
8
11
R155
10K
Q153
2SA1309ARTA
SWITCHING
Q157
R166
2SC2412KT96R
C156
100K
2700P
SWITCHING
C155
0.047
[5.3V]
13
21
(5.8V)
<5.4V>
Q157
[5.9V]
(6.4V)
[5.3V]
<6V>
11
20
14
(5.8V)
<5.4V>
SW1 OSC
MW OSC
15
19
R164
22K
18
16
17
R162
2.2K
[0V]
(0.2V)
<0V>
[0V]
Q159
(0V)
<0V>
[0V]
[0.7V]
[0.1V]
(0.1V)
(0.7V)
Q155
(0V)
<0.1V>
<0.7V>
<0.1V>
R168
R169
22K
15K
[0V]
(0V)
<0V>
Q159
2SC2412KT96R
SWITCHING
C128
1000P
36
[0V]
(0V)
<0V>
Q101
[0V]
(0V)
<11.5V>
R106
R107
C103
470K
330
0.01
CF202
1
R104
1K
3
Q151
[5.3V]
(5.8V)
<5.4V>
R172
R151
180K
15K
Q153
[5.4V]
[5.3V]
(5.8V)
(5.8V)
<5.4V>
<5.4V>
[4.7V]
(5.1V)
<4.8V>
R153
R161
15K
10K
[0V]
(0V)
[8.1V]
<0V>
(8.2V)
<8.2V>
[0V]
(0V)
<0V>
Q158
C158
1000P
Q158
DTC114EKA146
SWITCHING
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