Technics SA-DX950 Service Manual page 66

SCHEMATIC DIAGRAM - 10
: +B SIGNAL LINE
MAIN CIRCUIT
LS4
LS3
C583
16V10
MAIN_SLIN
R593
2.7K
<0V>
<-16.37V>
R583
Q553
47K
R553
<0V>
1K
<0V>
<-16.36V>
R584 Q554
R554
47K
RS3
<0V>
1K
MAIN_SRIN
R594
C584
2.7K
16V10
RS4
Q551~Q557
2SD1915FTA
AUDIO MUTING SWITCH
L4 L5
MAIN_LIN
R591
2.7K
<0V>
<-16.36V>
R581
Q551
47K
R551
1K
<0V>
<-16.36V>
R582 Q552
R552
47K
R4
<0V>
1K
R592
2.7K
MAIN_RIN
<0V>
R585
<-16.26V>
Q555
C3
47K
R555
<0V>
1K
MAIN_CIN
R595
C585
Q560
16V10 2.7K
RVTDTA114EST
REGULATOR
Q556
<0V>
<-15.46V>
R586
W3
R548
47K R556
<0V>
1K 8.2K
R596
MAIN_SWIN C586
16V10 2.7K
W4
C533
0.1
SW_OUT
R549
<0V>
<0.73V> 8.2K
Q557
R557
R546
<0V>
1K
100K
C534
0.1
SW_MIX
2SD2374PQAU
REGULATOR
2SC3940AQSTA
REGULATOR
2SC1740SQSTA
REGULATOR
2SA1534AQRTA
REGULATOR
C758
16V100
L751
RLQB101KTA-Y
2 3 4 5 6 7 8
1
CN902
TO
PANEL CIRCUIT (CP902)
ON SCHEMATIC DIAGRAM-7
: -B SIGNAL LINE
R550
8.2K R671
220(P)
C535 270(PC)
R545
0.1
680K
R672
100(P)
120(PC)
-14V
C652
63V33
C651
63V33
RSN310R37-P
POWER AMP
C641 R642
63V33 1.8K
R5
C4
C602 R604
63V33 1.8K
R603
C601
1.8K
63V33
Q560
<5.59V>
<5.47V>
<4.41V>
LIMITTER
<-15.48V>
R639
100K
R544
R547
-14V
100K
680K
SW_MUTE
+14V
-14V
Q701
<14.22V>
+5.6V
<5.59V>
Q706
Q706 <6.21V>
S-DET
C714
Q704
25V47
D708
MTZJ16CTA
-27V
Q707
<-17.27V>
Q708
-14V
<-16.74V>
3 4 8
1 2 5 6 7 9 10
CN903
TO
PANEL CIRCUIT (CP903)
ON SCHEMATIC DIAGRAM-7
: MAIN SIGNAL LINE
21 16
22 20 19 18 17 15
C653
820P
C658
10P
R656 R658
R654
220 56K
1.8K
R671
R674 R655
R672
4.7 220
R657
R653
C672
56K
1.8K
100V33
C657
10P
22 21 18 17
24 23 20 19
IC601
C603
100P
C608 18P
R608 56K
R647
C643 18P
220
R643
56K
R607
56K
C618
Q604
1000P
C607
18P
RVTDTA114EST
VOLTAGE SWITCH
Q651
<0V>
<0V> <-0.29V>
<-40.9V>
R640 <-9.38V>
680
Q651-Q652
RVTDTA143XST
RELAY CONTROL
R615
680
Q701
<14.27V> <25.36V>
Q703
<14.81V> <24.34V>
C708
0.01
<15.49V>
C710
Q704
<6.8V>
0.01
<6.2V>
R712
C715
6.8K
16V100
D705
MTZJ6R2BTA
D707 C712
50V10
MTZJ33DTA
Q725
<-32.52V> Q707
R722
C711
0.01
<-31.86V> <-38.25V>
R725 R721
1.5K 560
C713
0.01
<-25.67V>
Q725
Q708
RVTDTC144YST
2SB1548PQAU
REGULATOR
REGULATOR
4
1 2 3 5 6 7 8 9 10 11 12
W701
TO
TRANSFORMER CIRCUIT (W701)
ON SCHEMATIC DIAGRAM-12
IC651
14 13 12 11 10 9 8 7 6 5 4
D651-D652
R683
C666
IN5402BM21
47K
25V100
OVL2
IC601
16
15 14 13 12 11 10 9 8 7 6
R630 D601-D602
RK306LFU1
120K
C616
R633
50V47
47K
C617
R634
100V2.2 470K
Q601-Q603
RVTDTA143XST
Q652 RELAY DRIVE
<-0.29V>
<-0.6V>
<-0.55V>
R623
6.8K
<-9.61V> Q603
<-7.44V>
<-0.74V>
<-0.77V>
Q703
2SC1740SQSTA
REGULATOR
R723
1.2
R707 R705
<24.8V>
220
4.7K
Q723
R706
<24.57V>
<0V>
1K
C705
C707
35V5600P
35V100
D732
RVD1SS133TA
C706
35V5600P
<5.03V>
<0V>
<0V>
12K
<4.82V>
Q724
<-24.62V>
<-24.74V>
R724
1.2
Q724
RVTDTC114EST
REGULATOR
3
1 2
W752
TO
POWER CIRCUIT (W752)
ON SCHEMATIC DIAGRAM-12
3 2 1
IC651
RSN313H25-P
POWER AMP
5
4 3 2 1
L604
RLQYR73MW-E
R610 47
L603
RLQYR73MW-E
R609
47
<-0.65V>
<-0.61V>
Q601 Q602
<4.76V>
<-0.71V>
<-24.87V>
Q723
RVTDTA114EST
REGULATOR
C721
0.1
R727 R726
120
120
D721-D728
1N5402BM21