Technics SA-EH760 Service Manual page 74

SCHEMATIC DIAGRAM-6
B
MAIN CIRCUIT
R570
2.2M
C552
R559
0.01
4.7K
-7.5V
-7.5V
0.3V
Q551
2SA1995RSTA
SIGNAL LEVEL DET.
A
B
C
D
E
F
Q703
2SD2137PQTA
REGULATOR
7.5V 29.9V
R797
0
R729
8.1V
220
R635
2.2K
14.8V
-7.5V
14.2V
10.4V
C639
1000P E601
C640
1000P
C641
1000P
C642
1000P
C732
0.022
C647
1000P E602
Jeanne van Woerkom electra
: POSITIVE VOLTAGE LINE
: NEGATIVE VOLTAGE LINE
Q555
2SD2144STA
SIGNAL LEVEL DET.
7.5V
R591 -7.5V
4.7K
R548
1K
D552
MA165TA 0V
7V
7.5V
D555
MA4100MTA
Q554
2SA1995RSTA
SIGNAL LEVEL DET.
A
B
Q709
2SD2144STA
RELAY DRIVE
C
D563
R738
MA165TA
3.9K
D
G
E -30.7V
F
CN781
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
W701B
R749
1K
10.4V 14.2V
Q711
2SB1548PQAU
13.5V
REGULATOR
R770
13.5V
100K
10.2V
Q725
2SC5398RSTA
9.6V
REGULATOR
www.freeservicemanuals.info
: SURROUND SP.DRIVE SIGNAL LINE
: CENTER SP.DRIVE SIGNAL LINE
L605
B
R649
1/2W10
R650
1/2W10
L606
A
Q617, 618
2SD2144STA
Q618
RELAY DRIVE'
0.7V
R644
1/2W10
R667 R668
3.9K 47K
L604
E
R645
1/4W10
Q617
0.7V
R643
1/2W10
I H
L603
F
R776 10K
D736
MA165TA
RL701
0V
6 4 3
0.7V
R766
5 2 1
1/2W47
6.2V
30.2V
D C F
14.2V 6.2V
J
N
R
Q
P
F
E
C
POWER SUPPLY CIRCUIT
29.4V
Q702
2SB1548PQAU
REGULATOR
-7.5V -30.3V
-8V
-8V
-0.6V
Q705
2SA1995RSTA
REGULATOR
: SOURCE SIGNAL LINE
RL602
8 7 6 5
1 2 3 4
0V
RL605
1 2 3 4
0V
8 7 6 5
W722
1
2
3
4
G
W721
1
2
3
4
5
6
7
8
9
10
Q701
2SD2374PQAU
REGULATOR
14.8V 29.4V
R725
15.4V
10
B
A
C
D
B
E
A