Service Manual
STR-K1600
2424
STR-K1600
5-9. SCHEMATIC DIAGRAM — MAIN SECTION (2/2) — • Refer to page 41 for IC Block Diagrams.
IC B/D
IC B/D
IC B/D
2.9
1.1
-1.1
-45.3
0
0
0
0
-45.5
-1.1
1.1
46.9
46.9
-46.7
1.1
46.9
-1.1
0
2.9
0
-45.5
-45.3
-46.7
46.9
-1.1
0
1.1
0
1.1
46.9
-1.1
0
2.9
0
-45.5
-45.3
-46.7
46.9
-1.1
0
1.1
0
7
-5.6
-4.5
-5.6
-5.6
1.2
-7
-5.6
-46.7
-47.2
-47.4
6.5
6.4
1.1
0.5
-0.6
-1.1
-1.1
-0.6
0.5
1.1
0.5
-1.1
-0.6
1.1
0.5
-1.1
-0.6
1.1
0.5
-1.1
-0.6
1.1
-1.1
-0.6
0.5
1.1
1.1
47
0
0
-47.4
-1.1
-1.1
-47.4
0
47
1.1
0
47
1.1
0
47
1.1
0
-1.1
0
-47.4
-1.1
0
-47.4
47
1.1
0
-47.4
0
-1.1
-47.4
0
-1.1
1.1
0
47
0
0
0
0
0
-36.8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-36.8
0
0
-36.8
0
0
-36.8
0
0
-36.8
0
0
0
0
-36.8
6.5
0
6.5
0
6.5
0
6.5
0
6.5
0
6.5
0
0.2
0.8
0.7
0.2
0.7
0.2
0.7
0.2
0
-40
0
-40
3.3
0
3.3
0
-40.7
3.2
-46.5
AUS MODEL
AUS
MODEL
AUS MODEL
AUS MODEL
T901
POWER
TRANSFORMER
(MAIN)
J
DIGITAL
BOARD
(4/4)
CNP503
C
1
MAIN
BOARD
(1/2)
2SC3052EF-T1-LEF
2%
R669
198765432 151413121110
IC701
µPC2581V-S
+VOUT1
-VOUT1
NF1
IN1
GND
IN2
NF2
-VOUT2
+VOUT2
VCC
VCC
VEE
500V
33p
C705
100p
C706
100p
C756
500V3pC704
500V3pC754
10V
100
C703
10V
100
C753
100p
C707
100p
C757
50V4.7
C701
50V4.7
C751
100V2.2
C744
2%
22k
R744
1k
R701
1k
R751
68k
R702
68k
R752
2%68kR754
2%68kR704
2%
2.2k
R753
2%
2.2k
R703
500V3pC554
500V33p
C565
100V
2.2
C741
198765432 151413121110
IC501
µPC2581V-S
+VOUT1
-VOUT1
NF1
IN1
GND
IN2
NF2
-VOUT2
+VOUT2
VCC
VCC
VEE
2%
2.2k
R553
10V100
C503
68k
R562
2%68kR505
100p
C507
100p
C567
100p
C506
68k
R502
2%
2.2k
R503
1k
R501
50V4.7
C501
10V100
C553
2%68kR554
1k
R561
500V3pC504
2%
22k
R741
500V
33p
C505
50V4.7
C561
100V
2.2
C743
500V33p
C605
100p
C657
1k
R601
1k
R651
2%68kR604
2%
22k
R743
50V4.7
C651
100p
C607
10V
100
C603
500V
33p
C655
2%
2.2k
R65368k
R602
10V
100
C653
68k
R652
100p
C656
100p
C606
50V4.7
C601
500V3pC654
2%
2.2k
R603
198765432 151413121110
IC601
µPC2581V-S
+VOUT1
-VOUT1
NF1
IN1
GND
IN2
NF2
-VOUT2
+VOUT2
VCC
VCC
VEE
500V3pC604
100p
C566
DTA124ESA-TP
Q692
B- SWITCH
1SS355WTE-17
D691
UDZSTE-1730B
D690
47k
R696 10kR695
220kR690
0.1C691
10k
R693
10k
R698
2W
330
R692
470k
R699
2SC1815GR-TPE2
Q691
B- SWITCH
C804
6800
71V
D5SBA20-4003
D802
RECT
100V
0.22
C805
100V
0.22
C806
2SA1115TP-EF
Q701
2SC3623ATP-LK
Q702
2SA1163L-TE85L
Q706
2SA1163L-TE85L
Q705
123
MN2488-OPY-MK
Q703
B
C
E
112233123123123123
MP1620-OPY-MK
Q704
B
C
E
2.2k
R710
82k
R711
33R714
2%
4.7k
R719
6.2k
R721
R716 0.22X2 5W
33
R715
560
R713
25V
47
C710
500V
C717
47p
220p
C720
1.5k
R722
15kR724
68k
R725
10
R717
47k
R723
0.022
C711
500V47p
C716
25V
47
C660
2SA1163L-TE85L
Q656
2SC3623ATP-LK
Q652
2SA1163L-TE85L
Q655
MP1620-OPY-MK
Q654
B
C
E
33
R664
82k
R661
R666 0.22X2 5W
2.2k
R660
2SA1115TP-EF
Q651
10
R667
500V
C666
47p
220p
C670
123
MN2488-OPY-MK
Q653
B
C
E
33
R665
2%
4.7k
0.022
C661
6.2k
R671
500V47p
C669
47k
R673
560
R663
R616 0.22X2 5W
10
R617
33R614
2SC3623ATP-LK
Q602
0.022
C611
220p
C619
2SA1115TP-EF
Q601
82k
R611
2SA1163L-TE85L
Q605
123
MP1620-OPY-MK
Q604
B
C
E
68k
R625
500V
C621
47p
15k
R624
25V
47
C610
33
R615
6.2k
R621
2.2k
R610
1.5k
R622
500V47p
C620
2SA1163L-TE85L
Q606
4.7k
R620
MN2488-OPY-MK
Q603
B
C
E
R766 0.22X2 5W
68k
R775
2.2k
R760
500V47p
C767
MP1620-OPY-MK
Q754
B
C
E
15k
R778
2SA1163L-TE85L
Q755
220p
C770
2SA1163L-TE85L
Q756
2SA1115TP-EF
Q751
2%
4.7k
R769
47k
R773
25V
47
C760
33R764
1.5k
R772
33
R765
123
MN2488-OPY-MK
Q753
B
C
E
2SC3623ATP-LK
Q752
6.2k
R771
10
R767
0.022
C761
500V
C766
47p
560
R763
82k
R761
33R514
33
R515
220p
C519
68k
R525
123
MP1620-OPY-MK
Q504
B
C
E
500V47p
C516
82k
R511
2SA1163L-TE85L
Q506
47k
R5736.2k
R521
2SA1163L-TE85L
Q505
25V
47
C510
R516 0.22X2 5W
560
R513
1.5k
R522
0.022
C511
500V
C517
47p
MN2488-OPY-MK
Q503
B
C
E
2.2k
R510
2SA1115TP-EF
Q501
10
R517
2%
4.7k
R520
2SC3623ATP-LK
Q502
6.2k
R531
33R575
220p
C539
0.022
C531
500V47p
C576
R526 0.22X2 5W
560
R576
2SA1163L-TE85L
Q536
2SA1115TP-EF
Q571
2SA1163L-TE85L
Q535
25V
47
C570
33
R574
15k
R534
2%
4.7k
R530
10
R537
1.5k
R572
82k
R571
500V
C577
47p
MN2488-OPY-MK
Q533
B
C
E
2SC3623ATP-LK
Q572
123
MP1620-OPY-MK
Q534
B
C
E
47k
R523
68k
R535
1SS355WTE-17
D705
15k
R748
15k
R747
0.01
C742
1SS355WTE-17
D740
50V
10
C740
2SC3052EF-T1-LEF
Q740
47k
R746
0.01
C729
1SS355WTE-17
D729
0.01
C642
22k
R640
15k
R648
4.7kR675
2SC3052EF-T1-LEF
Q640
50V
10
C640
1SS355WTE-17
D665
15k
R677
1SS355WTE-17
D640
L701
4.7
R718
2SA1163L-TE85L
Q795
2SA1163L-TE85L
Q725
2SC3052EF-T1-LEF
Q793
2SC3052EF-T1-LEF
Q723
Q722
2SC3052EF-T1-LEF
Q710
RELAY DRIVER
RY701
100k
R790
100k
R770
10V
220
C791
10V
220
C721
50V
10
C722
10k
R780
6.8k
R735
39k
R737
1k
R736
1SS355WTE-17
D721
1SS355WTE-17
D722
1SS355WTE-17
D732
4.7R668
L651
22k
R680
0.01
C681
15k
R681
4.7kR655
2SC3052EF-T1-LEF
Q680
47kR656
50V
10
C680
1SS355WTE-17
D605
15k
R657
1SS355WTE-17
D680
4.7
R618
L601
47k
R623
0.01
C752
15k
R758
4.7k
R755
2SC3052EF-T1-LEF
Q750
50V
10
C750
1SS355WTE-17
D765
15k
R757
1SS355WTE-17
D750
1SS355WTE-17
D749
0.01
C749
4.7
R768
L751
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
1SS355WTE-17
D529
0.01
C529
0.01
C581
22k
R580
15k
R588
R585
4.7k
2SC3052EF-T1-LEF
Q580
R586
47k
50V
10
C580
1SS355WTE-17
D585
15k
R587
1SS355WTE-17
D580
RY601
82
R634
2SC3052EF-T1-LEF
Q610
RELAY DRIVER
1SS355WTE-17
D610
RY791
82
R793
2SC3052EF-T1-LEF
Q790
RELAY DRIVER
1SS355WTE-17
D791
2.2k
R731
2.2k
R791
1W680R794
1W680R792
6.8k
R840
22k
R844
25V47
C842
0.01
CC11
0.01
CC12
0.01
CC13
0.01
CC10
10
RR11
10
RR13
10
RR12
10
RR14
100V10
C732
100V10
C733
1R733
1
R732
REDBLKBLK RED
TB001
8P
L(+)
L(-)
SL(+)
SL(-)
R(+)
R(-)
SR(+)
SR(-)
WP101WP102
1
3
4
5
CN792
4P
HP_DETECT
R-CH
GND
L-CH
UDZSTE-173.0B
D841
500V33p
C755
560
R613
4.7kR745
15k
R524
22k
R740
47k
R676
47k
R756
68k
R638
2%68kR654
82
R734
1SS355WTE-17
D710
10k
R694
15k
R674
1.5k
R672
JL001
1SS355WTE-17
D611
RY610
2SC3052EF-T1-LEF
Q612
RELAY DRIVER
82
R635
10
RR15
10
RR16
0.01
CC15
0.01
CC16
10
RR17
10
RR18
0.01
CC17
0.01
CC18
22k
R750
1
2
3
4
5
5P
CNP801
R1 (SIDE1)
R2 (SIDE2)
GND
R2 (SIDE2)
R1 (SIDE1)
4.7R568
L551
4.7
R518
L501
+
-
+
-
TM603
4P
1
2
3
4
5
8765
4321
NJM4565M(TE2)
IC691
100k
R759
100k
R539
100k
R739
10k
R729
10k
R749
10k
R529
0
R843
2W
100
R691
1k
R631
1k
R633
1SS355WTE-17
D733
2%
2.2k
R570
A1
A3
A4
A5
A6
A7
A8
A10
A11
A12
A13
A15
A16
A17
A9
1
2
3
4
5
5P
CNP790
HP_DETECT
NC
R-CH
GND
L-CH
CL074
J790
CL072
CL071
C791 0.1
CL073
C790
0.1
1
TP790
LEAD TO CHASSIS
C803
6800
71V
JW786
JW788
JW783
JW785
1
3
4
5
6
7
8
9
CNP913
8P
PROTECTOR
FRONT A_RY
SB/CTR/REAR_RY
HP CTRL
HP RY
SW_RY
FRONT B_RY
BRIDGEABLE_RY
66
55
68
68
61
62
61
66
68
55
62
IC691
OVERLOAD
IC501
PRE DRIVER
IC601
PRE DRIVER
IC701
PRE DRIVER
MAIN BOARD
(2/2)
+-
+
VEE
-
VCC
HEADPHONE BOARD
MUTE
COMP1
COMP2
COMP1
MUTE
COMP2
COMP1
MUTE
COMP2
DETECT AMP
Q501-504,533,534,571,572,
Q601-604,651-654,701-704,751-754
POWER AMP
Q505,506,535,536,605,606,
Q655,656,705,706,755,756
CURRENT DETECT
Q540,580,640,680,740,750
OVERLOAD DETECT
Q722,723,725,793,795
PROTECTOR
SURROUND
BACK
CENTER
TM603
SPEAKERS
IMPEDANCE USE 6-16Ω
FRONT
SURROUND
+
-
+
-
TB001
-
+
+
-
SPEAKERS
IMPEDANCE USE 6-16Ω
PHONES
156
E
9821
C
10 135
A
1211
H
147
F
D
K
3
B
I
G
4
J
16
(Page
23)
(Page 39)
(Page 30)
Ver. 1.1