Panasonic SA-AK78 Service Manual page 45

SCHEMATIC DIAGRAM-19
IC502
RSN35H1
POWER AMP(CENTER)
14 13 12 11 10
0V 0V
R545 C529 C530
5.6K 1000P 1000P
R547
5.6K
C533 R550
15P 56K
R549
56K
31.6V
-32.1V
((0V))
((14.8V))
0.8V
0V
0V
14.2V
0V
14.7V
0V
14.7V
0V Q504
14V
KTC3199GRTA
RELAY DRIVE
64.6V
-65V
IC503
STK470-050
REGULATOR
1 2 3 4 5
14.4V 13.2V 13.6V 3.2V 3.3V
14.8V 13.9V 14.2V 0V 0.1V
14.7V 13.8V 14.2V 0V 0.1V
14.3V 13.3V 13.5V 3.2V 3.3V
-7.7V
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:NEGATIVE VOLTAGE LINE
:POSITIVE VOLTAGE LINE
MUTE AC LATCH
9 8 7 6 5 4 3
-15.3V -4.2V -15V
0V 0V
R551
330K
C534
100V10
C532
15P
R548
56K
C520
0.1
STB
6 7 8 9 10 11 12 13
0V -29V -8.3V -7.7V 7.7V 14.8V
C577
0.01
C575
0.01
R579
3.3K
:SUB WOOFER/FRONT LOW SP DRIVE SIGNAL LINE
:CD SIGNAL LINE :SURROUND/HIGHT SP DRIVE SIGNAL LINE
E A B
RLY504
8 2
2 1
-32.1V 31.6V 0V
1 7
RLY505
6
5
64.6V
31.6V
-32.1V
C569 C568 C567 C566
4700 5600 5600 4700
CP505
12 11 10 9 8 7 6 5 4 3 2 1
12 11 10 9 8 7 6 5 4 3 2 1
CN505
R571 47K
64.6V
14
16V 28.6V
D572
C572
1D3E
1000P
Q576
28.6
29.9V D565-568
V
1N5402BM21
D568
C580 64.6
1000P V
Q576
2SC3940AQSTA
R584 R581
STABLIZER
1.5K 4.7K
D567
D580
MTZJ18ATA
-32.1V
14.8V
45
F C D
JK501
HIGHT
3 4
MID
Lch
6 5
LOW
SPEAKERS
4 3
(6 )
JK502
2 1
HIGHT
Rch
MID
LOW
JK503
Lch
SURROUND
SPEAKERS(8 )
Rch
CENTER
SPEAKERS
(8 )
C565
0.01
E500
D561
D562
D561-564
1N5402BM21
RLY501 C571
0.1
2 4
H502
1 3 1
2
3
5 6
4
D571 5
RVD1SS133TA
6
7
8
9
10
11
12
SA-AK78