Technics SA-DV290EE, Service Manual

Page: 42 / 55

25 26 27 28 29 30 31 32 33 34 35 36
SA-DV290(EE,GN) MAIN,POWER SUPPLY CIRCUIT DIAGRAM
M
Q708
UN4211TA
SWITCHING
(POWER)
Q601 Q602
D756
MA700A
T
A
C603
470P
C604
470P
C607
470P
C608
470P
C649
1000P
C650
1000P
C605
1000P
C606
1000P
C648
1000P
C617
0.01
R637
15K
R638
68K
R619 120K
R622 120K
R621 150K
R624 150K
R620
120K
R612 56K
R611 56K
R610 150K
R609 56K
R608 56K
R607 56K
C610 56P
C609 56P
C612 15P
C611 39P
C614 47P
C613 47P
R627 470K C616
50V0.47
N
D601
SB360L6508
D602
SB360L6508
D754
RL1N4003N02
C761
0.1
D701
1N5402BM21
C709
0.1
IC601
RSN311W64B
POWER AMP
D757
MA700A
T
A
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 18 19 20 21 22 23 24 25 26 16 17
R604
3.3K
R601
3.3K
R602
3.3K
R618
4.7K
Q601,602
2SC5398RSTA
PROTECTOR
D607
1SS291TA
L
K
D658
MA165T
A
D657
MA165T
A
B
A
R685
1K
R686
1K
Q605,607,608
2SD2144STA
MUTING
Q607
Q608
C705
0.01
G
R776
10K
Q709
2SD2144STA
SWITCHING
(POWER)
R738
3.9K
R739
47K
C622
10V100
D659
MA165T
A
D751
1N5402BM21
D703
1N5402BM21
D753
RL1N4003N02
D761
RL1N4003N02
D755
RL1N4003N02
D752
1N5402BM21
D702
1N5402BM21
D704
1N5402BM21
G
F
E
D
A B C
D558
MA165TA
R544
10K
R572
15K
R648
120
C618
0.01
R635
2.2K
C619
0.1
Q503
2SC5398RSTA
SWITCHING
C704
35V4700
C702
35V4700
C703
35V4700
C701
35V4700
R761
220
R628
22K
R691
68
R647
270
R623
120K
CN781
F
C
A
B
D
E
Q551
2SA1995RSTA
SIGNAL LEVEL DET.
Q555
2SD2144STA
SIGNAL LEVEL DET.
Q702
2SB1548PQAU
REGULATOR
Q725
2SC5398RSTA
STABILIZER
Q705
2SA1995RSTA
STABILIZER
Q701
2SD2374PQAU
REGULATOR
R556 100K
R557
10K
C721
10V100
D725
MA4082L
T
A
R729
220
C723 0.047
C639
1000P
C640
1000P
C641
1000P
C642
1000P
C732
0.022
C647
1000P
D738
MA165T
A
D730
MA4091HT
A
R768
100
R724
3.9K
C718
25V100
D723
MA4150HT
A
R723
5.6K
C719 0.047
R725
10
C724
0.047
C710 0.047
R546
18K
R551
18K
R552
47K
R555
22K
C550
0.01
D552
MA165TA
D555
MA4100MTA
R547
18K
E602
E601
R749
1K
D739
MA165T
A
POWER SUPPLY CIRCUIT
C
1 10 3 2 4 5 6 7 8 9
W701B
1 10 3 2 4 5 6 7 8 9
R720
3.9K
C734
50V3.3 D758
MA165T
A
C722
25V100
C720 0.047
C717
16V33
MAIN CIRCUIT
B
G
R765
470
N
R569
10K
D554
MA165T
A
C371
6.3V100
Q556
2SC5398RSTA
MOTOR DRIVE
R568
100
D553
MA700A
T
A
C556
16V10
C555 50V1
Q557
2SA1995RSTA
MOTOR DRIVE
Q553
2SD2144STA
MOTOR DRIVE
R570
2.2M
R560 100K
C559
0.01
D581
RL1N4003N02
R567
22
FAN MOTOR
JK551
R566
68K
Q554
2SA1995RSTA
SIGNAL LEVEL DET.
M
R719
3.3K
Q703,704
2SD2137PQTA
REGULATOR
R796
2.2
Q703
Q704
R769
27
R727
3.9K
C554
16V220
R561
100K
C552
0.01
R559
4.7K
R591
4.7K
C551
50V2.2
D551
MA165T
A
1 2
D583
RL1N4003N02
N
R721
4.7
R722
2.2
A B
R753
0.47
R754
0.47
Q711,712
2SB1548PQAU
REGULATOR
Q711
R797
2.2
R767
27
R558
2.2K
D582
RL1N4003N02
Q712
R683
1K
Q605
N
R603
3.3K
: POSITIVE VOLTAGE LINE
: NEGATIVE VOLTAGE LINE :AUDIO SIGNAL LINE
7.6V
-10.4V
0V 0V 59.5V -59.5V 0V 28.9V -29.3V 0V 0V 0V 0V -0.2V 29.4V -29.7V 0V 0V 54.1V -51.4V 0V 0V 0V 0V
0V
0V
4.7V 4.7V
0V
0V
0.7V
0V 0V
2.1V
14.7V
0.7V
0V
0.7V
0V
29.2V
29.2V 14.7V
15.2V
-30.1V
-11V
-10.4V
-11V
-0.6V
14.1V
13.6V
9.6V
10.2V
10.4V
-10.4V
14.7V
7.6V
7V
0V
7.6V
0.3V
-10.4V
-10.4V
-10.4V
7.6V
7.6V
6.8V
FAN ON:1.6V
0V
FAN ON:0V
0.5V
FAN ON:0V 4.7V
0V
0.5V
8.1V
8.1V
30.1V
30.1V 7.6V
7.6V
0V
10.4V
13.6V
10.4V 14.1V
13.6V
0.7V
0V