Sony STR-K990 - Schematic Diagram - MAIN Board (3;4)

2727
STR-K990
STR-K990
4-13. SCHEMATIC DIAGRAM – MAIN BOARD (3/4) –
• See page 41 for IC Block Diagram.
IC B/D
2
MAIN
BOARD
(1/4)
(Page 25)
4
MAIN BOARD
(2/4)
(Page 26)
5
MAIN BOARD
(4/4)
(Page 28)
3
1.2
-1
0.2 0.2
-45
-1
1.2
46 46
-46
7-5.5
-5.5
1.2
-6.9 0
-4.4
6.5
-5.5
6.5
-46
-46
-45.3
1.2
0.5
0.5
-0.5
-1
-1
0.3
0.8
0
6.5
0.1
46
0.1
-1
-46
-0.1
-0.1
0
0.1
-0.1
-0.1
-46
No mark:FM
100V
2.2
C741
198765432 151413121110
UPC2581V-S
IC501
+VOUT1 -VOUT1 NF1 IN1 GND IN2 NF2 -VOUT2 +VOUT2 VCC VCC VEE
10V
100
C503
68k
R505
100p
C507
100p
C506
68k
R502
2.2k
R503
1k
R501
50V
4.7
C501
500V
3p
C504
22k
R741
500V
33p
C505
JW501 JW502
DTA124ESA-TP
Q692
1SS355WTE-17
D691
UDZSTE-1730B
D690
47kR696
10k
R695
220k
R690
0.1
C691
10k
R693
10k
R698
330
R692
470k
R699
2SC1815GR-TPE2
Q691
33
R514
33
R515
220p
C519
68k
R525
123
MP1620-OPY-MKQ504
B
C
E
500V
47p
C516
82k
R511
2SA1163L-TE85L
Q506
47k
R573
6.2k
R521
2SA1163L-TE85L
Q505
25V
47
C510
0.22R516
560
R513
1.5k
R522
0.022
C511
500V
C517
47p
123
MN2488-OPY-MKQ503
B
C
E
2.2k
R510
2SA1115TP-EF
Q501
10
R517
4.7k
R520
2SC3623ATP-LK
Q502
0.01
C541
22k
R540
15k
R546
4.7k
R555
2SC3052EF-T1-LEF
Q540
47k
R556
50V
10
C540
1SS355WTE-17
D505
15k
R557
1SS355WTE-17
D540
D529
0.01
C529
R585
4.7k
R586
47k
6.8k
R840
22k
R844
25V
47
C842
100V
10
C732
100V
10
C733
1
R733
1
R732
D841
15k
R524
10k
R694
1SS355WTE-17
D611
RY610
2SC3052EF-T1-LEF
Q612
82
R635
4.7
R518
1.7uH
L501
TM604
1
2
3
4
8765
4321
NJM4565M(TE2)
IC691
100k
R539
10k
R529
0
R843
R691
1k
R633
68
VACS-CTRL
VEE
+V_C
-V_C
PROTECT DET
POWER AMP
4
3
5
8
12
30292827 262524232221201918171615 14
31 32 33
34
35 36 37 38
IC501
IC691
LIMITER
LIMITER
CURRENT DETECT
CURRENT DETECT
BOOSTER
AF POWER
PROTECT
1SS355WTE-17
RELAY DRIVE
2P
SPEAKERS
(INPEDANCE USE
6-16
Ω)
TM604
CENTER
UDZSTE-173.0B
-B SWITCH
-B SWITCH
(3/4)
MAIN BOARD
+
–
C
C
18