Technics SA-DV250 Service Manual page 11

SCHEMATIC DIAGRAM-5
IC601
RSN311W64B
POWER AMP
26 25 24 23
0V 0V 0V
C648
1000P
B
A
R602
3.3K
R601
3.3K
R604
3.3K
R685
0V
1K
0.7V
Q607
R686
0V
1K
0.7V
Q608 Q607, 608
2SD2144STA
MUTING
L
K
M
G
A B
: POSITIVE VOLTAGE LINE
: NEGATIVE VOLTAGE LINE
22 21 20 19 18 17 16
0V -51.4V 54.1V 0V 0V -29.7V
R612 56K
C610 56P
R611 56K
C609 56P
R610 150K
C612 15P
R609 56K
C611 39P
R608 56K
C614 47P
R607 56K
C613 47P
R648
R691
120
68
R647
270
R738
3.9K
Q708 Q709
UN4211TA 2SD2144STA
SWITCHING
SWITCHING
(POWER)
(POWER)
2.1V
0V 0V
0.7V
C
:AUDIO SIGNAL LINE
7.6V
-10.4V
15 14 13 12 11 10 9
29.4V -0.2V 0V 0V 0V
R620
120K
R619 120K
R622 120K
R621 150K
R624 150K
R623
120K
5.1V 5.1V
0V
0V
Q601 Q602
1SS291TA
Q601,602
2SC5398RSTA
PROTECTOR
D558
R544
0V
MA165TA
10K
0V
Q503
2SC5398RSTA
SWITCHING
1N5402BM21
D704
1N5402BM21
14.7V
8 7 6 5 4 3 2
0V -29.3V 28.9V 0V -59.5V 59.5V 0V
D607
R635
2.2K
D703
G
F
E
D
1
0V