Panasonic SA-AK78 Service Manual page 43

SCHEMATIC DIAGRAM-17
K
MAIN CIRCUIT
Q383
2SB621ARSTA
REGULATOR
5V 6.8V
6V
Q384
2SC2412KT96R
REGULATOR
6V
4.8V
D383
DA204KT146
4.2V
Q381
2SB1417PQTA
REGULATOR
5.1V 6.8V
Q382
6.1V
2SC2412KT96R
REGULATOR
6.1V
4.9V
D381
DA204KT146
4.3V
R352
56K
Q352 0V
2SC2412KT96R 0.2V
FAN MOTOR DRIVE
Q351
KTA12710YTA
FAN MOTOR DRIVE
DAP202KT146
R357
13.5V
14.2V
10K
0V 13.6V 14.2V
13.6V R353 Q353
14.2V
4.7K
2SC2412KT96R
14.2V
FAN MOTOR DRIVE
13.5V
R355
5.6K
9V
R354
820K
C352
0.1
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:NEGATIVE VOLTAGE LINE
:POSITIVE VOLTAGE LINE
R383
4.7K
D385 D456
RL1N4003N02 RL1N4003N02
R385 R386
Q385
4.7K 4.7K
DTA114EKA146
STABILIZER
A B
Q354
Q354
2SC2412KT96R
5V
SWITCHING
0V
R356 C353
100 6.3V100
Q374
DTC114TKA146
SWITCHING
D351
Q375
2SA1037AKSTX
SWITCHING
R362
10K
0V
L451 10 H
43
:SUB WOOFER/FRONT LOW SP DRIVE SIGNAL LINE
:CD SIGNAL LINE :SURROUND/HIGHT SP DRIVE SIGNAL LINE
R332 C329
1K 16V10
0V
Q307
2SD2144STA
-5.7V
MUTING
-5.7V
-5.7V
-5.7V
-5.7V
((0.7V))
C333
50V3.3
((1.5V))
Q202
-5.7V
2SA1037AKSTX
-5.7V
MUTING CONT.
-5.7V
R338
-5.7V
3.3K
-5.7V
5V
5V
5V
5V
5V
5V
5V
5V
5V
5V
((1.5V))
((0.9V))
B
E
14.2V
R384 R387
1 1
13.5V
14.2V
13.5V
14.2V
14.2V
13.6V
14.2V
10K
13.6V
10K
-3V
Q373
2SC2412KT96R
POWER CONT.
0.2V
0.8V
D373
1SS355TE17
B C Q375
R378
5V
1K
-3V -3V 7.7V
10K
7.6V
R380
68K
R278
3.3K
D
R375
39K
A
-28.4V
-7.7V
3.3V
7.7V
14.2V
D454 RL1N4003N02
14.8V
C330 R337
JK204
16V10 220
SUB WOOFFER
C331
0.01
FAN MOTOR
CN351
M
B 1
2
A
CN504
1
B 2 MID/ FL
MID/ FR
3
A
L
To POWER
4 S.GND
CIRCUIT
S.GND
5
(CP504) on
D 6 S.W
SCHEMATIC
A TW/ SL
7
DIAGRAM-18
B TW/ SR
8
C CCH
9
SUB+B
14.8V 10
CN503
1
2
R443
3
1K
L
To POWER
SPCONT
4
CIRCUIT
5 FAN
(CP503) on
D.GND
6
SCHEMATIC
7 D.GND
DIAGRAM-18
DC DET
8
9 HP SW
PCONT
10
CN506
-VP
10
P.GND
9
M
To
/ TUNER
8
STABILIZER
-B
7
CIRCUIT
+B(2)
6
(H506) on
PCONT
5
SCHEMATIC
+B(5)
4
DIAGRAM-18
+B(4)
3
SUB+B
14.8V 2
+B(3)
1
SA-AK78