Technics RS-DV290EG Service Manual page 88

: POSITIVE VOLTAGE LINE
B
MAIN CIRCUIT
: NEGATIVE VOLTAGE LINE
IC601
RSN311W64B
POWER AMP
26 25 24 23 22 21 20 19 18
0V 0V 0V 0V -51.4V 54.1V 0V 0V
C648
1000P
B
A
R603
3.3K
R602
3.3K
R601
3.3K
R604
3.3K
R685
0V
1K
0.7V
Q607
R686 R691
0V
1K 68
0.7V
Q608
R683
0V
1K
0.7V
Q605
Q605,607,608 N
2SD2144STA L
K
MUTING
R738
3.9K
M
Q708 Q709
UN4211TA 2SD2144STA
SWITCHING
SWITCHING
(POWER)
(POWER)
2.1V
G
0V 0V
A B C
25 26
:AUDIO SIGNAL LINE
7.6V
-10.4V
17 16 15 14 13 12 11 10 9 8 7 6 5
-29.7V 29.4V -0.2V 0V 0V 0V 0V -29.3V 28.9V
R612 56K
C610 56P R620
120K
R611 56K
C609 56P
R619 120K
R610 150K
C612 15P R622 120K
R609 56K
C611 39P R621 150K
R608 56K
C614 47P R624 150K
R607 56K
C613 47P R623
120K
4.7V 4.7V
0V
0V
D607
Q601 Q602 R635
1SS291TA
2.2K
R648
120
Q601,602
2SC5398RSTA
PROTECTOR
D558
R544
0V
MA165TA
10K
0V
Q503
2SC5398RSTA
SWITCHING
R647
270
D703
1N5402BM21
0.7V D704
1N5402BM21
14.7V
27 28 29
Q556
2SC5398RSTA
MOTOR DRIVE
4.7V FAN ON:0V
0.5V
0V
4 3 2 1
0V -59.5V 59.5V 0V 0V
R796
2.2
7.6V
R797
2.2
7.6V
G
B A
C639
1000P
F E601
C640
1000P
C641
E
1000P
C642
1000P
D
C732
0.022
C647
1000P
E602
30 31 32
7.6V
R566
68K
FAN ON:0V
R568
0.5V
R570 100
0V
2.2M
Q557
C552 R559
7.6V
2SA1995RSTA
0.01 4.7K
-10.4V
MOTOR DRIVE
-10.4V
-10.4V
0.3V R558
R591
Q555
2.2K
4.7K
2SD2144STA
Q551 Q554
SIGNAL LEVEL DET.
2SA1995RSTA 2SA1995RSTA
SIGNAL LEVEL DET.
SIGNAL LEVEL DET.
D552 D555
MA165TA MA4100MTA
R561
100K
A
B
C
D
E
F
G
Q704
30.1V
8.1V
Q703,704
2SD2137PQTA
REGULATOR
Q703
R769 R767
27 27
30.1V
R729
8.1V
220
14.7V
-10.4V
10.4V
CN781
1 2 3 4 5 6 7 8 9 10
C
POWER SUPPLY CIRCUIT
1 2 3 4 5 6 7 8 9 10
W701B
Q711,712
2SB1548PQAU
R754
REGULATOR
Q702
0.47
10.4V 14.1V
2SB1548PQAU
Q712
REGULATOR
13.6V
Q711
-10.4V
10.4V 14.1V
13.6V
R768
100 13.6V
10.2V
Q725 -0.6V
9.6V
2SC5398RSTA
Q705
STABILIZER
2SA1995RSTA
STABILIZER
33 34
FAN MOTOR
M
1 2
JK551
C556
16V10
7.6V
7V
0V
C559
0.01
7.6V
0V
Q553
6.8V
2SD2144STA
FAN ON:1.6V
MOTOR DRIVE
R722
2.2
29.2V
Q701
2SD2374PQAU
REGULATOR
-30.1V
14.7V 29.2V
-11V
R725
15.2V
10
-11V
SA-DV290(EE,GN) MAIN,POWER SUPPLY CIRCUIT DIAGRAM
35 36