Sony STR-DG720 Service Manual ▷ View online
STR-DG720
STR-DG720
25
25
1
A
B
C
D
E
F
G
H
2
3
4
5
6
7
8
9
10
11
12
13
14
8
1
4
5
8
1
4
5
MAIN BOARD
OUT
-1
L
-2
R
-3
L
-4
R
-5
L
-6
R
-1
L
-2
R
-3
L
-4
R
-1
L
-2
R
-3
L
-4
R
IN
IN
TV
SURROUND BACK
SURROUND
R
SA-CD/CD/CD-R
AUDIO
IN
SAT
AUDIO
IN
DVD
AUDIO
OUT
AUDIO
IN
AUDIO
OUT
SUB WOOFER
L
R
L
VIDEO 1
CENTER
FRONT B
R
L
L
R
FRONT A
SPEAKERS
IMPEDANCE USE 8-16Ω
(12)
12
(11)
11
(CHASSIS)
J790
PHONES
BLK
1-875-699-
1-875-588-
C3037
C3032
R3022
IC3002
C3025
C3022
C3034
JS3022
JS3037
CNP411
JS432
JR321
JW826
JR702
JW827
JW833
JW830
JW845
C487
C489
C499
JW773
JWH1
C488
IC400
C556
C551
R551
R552
C554
JW829
JW748
R572
R570
C570
C571
Q570
CL005
B400
JS561
JS562
CL006
R556
JS563
Q551
JS564
R562
C561
Q561
R656
R658
JS565
R565
R564
R563
Q562
R557
R558
Q552
B C E
Q652
B C E
BCE
BCE
Q752
B C E
Q602
B C E
Q702
B C E
Q852
B C E
Q802
B C E
JW610
JW611
R708
R706
R707
JW627
C811
Q811
R813
R814
Q812
R815
R820
L828
RY375
CNP912
1
7
CNP912
1
7
R375
Q375
R376
JW686
C922
C923
JW685
JWH12
CN792
CNP790
ET902
BLU
GR
Y
D941
CN941
D940
C940
C941
GRN
YEL
RED
YEL
RED
GRY
BLU
C904
D942
D943
C930
CNP940
D930
1
6
R930
CNP930
JW859
CL004
CL003
CL008
W001
VIO
CL007
R351
D350
RY350
JW657
RR15
CC15
RR16
JW327
TB606
TB602
RY365
R353
R368
JWH11
R357
Q360
D370
R373
RY370
Q370
R371
R355
RY355
Q355
RY360
D360
C844
R506
D501
D500
JW781
R507
IC565
R546
Q500
R505
R502
AEP,TH
MODEL
MODEL
US,CND
MODEL
MODEL
E C B
R545
JW688
JW872
JW709
C803
JSH551
JW655
JWH2
JW330
JWH9
C325
JW648
R328
Q720
R722
D711
C611
JW676
C708
JW612
JW613
R716
L628
JS601
JWH4
JW691
JW642
JW692
R720
JW660
JW661
R715
Q712
R713
R714
Q711
JW608
JW609
JW694
R724
JWH7
C721
R723
JW656
C323
C320
JW658
JW753
IC800
JW743
JW761
JW754
JW762 C805
R804
C852
JS810
C802 C804
R801
JW760
R854
C855
C853
RR17
JS395
JS555
RR18
RR19
CC19
JS554
R302
CC18
CC17
Q365
D365
R366
Q350
C932
D931
CC12
RR12
JW323
JW321
JW322
JS922
JS920
JW643
CC14
RR13
CC13
RR14
JS397
JW750
CNP921
C931
JS930
Q930
R823
R824
R824
C821
Q820
R829
R830
R822
JW626
R807
JW600
R808
R806
JW604
JW605
R860
JW710
JW603
JW607
R857
R856
R858
JW606
C859
C861
Q861
R864
R863
Q862
R866
R865
Q870
JW675
R870
L878
R880
R879
JWH3
R872
C711
C871
R878
R816
JW602
JW866
JW631
R861
R862
R809
C808
C807
Q801
D81
1
R810
C809
R81
1
R812
C879
JW629
D870
R828
D820
C829
D375
R377
R821
C820
JW646
JW645
JW653
R392
R393
R932
C921
C933
R931
R940
JW332
JW331
JS394
CC1
1
JW328
C920
JW641
JW324
JWH5
R352
R350
R367
JW868
JW779
R365
JW782
JW783
JW790
JW789
JS603
R363
JW799
R360
R361
R372
JS552
R370
JW800
R467
JS472
R303
JS553
R362
JW791
D355
R358
R356
JW798
JS551
JW771
C856
C851
C801
R802
R852
R853
R851
C854
C806
JW767
R504
C500
JW766
R805
R503
R803
JS602
JW785
JW777
JW776
CC16
JW652
JW651
JW637
JW638
JW640
JW639
JW690
JW687
JW840
R510
R501
R51
1
Q501
JS510
JW659
JW770
JW689
JW679
R729
R728
L728
C729
D720
R709
R610
R612
R61
1
C609
C707
R721
C720
C709
R710
Q701
JW772
JW693
R730
JW867
JW632
R873
R874
D861
R871
C870
JW633
JW634
JW630
JW647
JW650
JW699
JW326
D921
JS392
JS393
JS390
JS391
RR1
1
JW325
JS398
JW329
C900
JW644
R378
Q851
C857
C858
R859
R712
R71
1
Q804
B
C
E
Q803
B
C
E
Q854
B
C
E
Q853
B
C
E
Q703
B
C
E
Q603
B
C
E
Q754
B
C
E
Q753
B
C
E
Q654
B
C
E
Q653
B
C
E
Q554
B
C
E
Q553
B
C
E
Q604
B
C
E
Q704
B
C
E
C553
C555
C544
C671
JS558
JS557
JS511
IC500
R554
R430
C430
C431
R431
JR434
CL002
JWH
10
JW863
JW862
JS470
JS460
JS410
R402
CC52
CC02
C409
R409
R452
VIO
JS471
R404
C403
CC54
R408C408
R458C458
C350
C471
CC04
JW855
C405
AEP
MODEL
MODEL
J403
J401
CC58
CC05
R470
R304
Q301
RY301
D301
R301
JS350
CN350
CN500
IC350
D352
C353
C703
R704
C705
C755
R753
R603
R605
R752
C754
R751
JR632
C606
C702
R703
C704
R705
R754
C545
LP400
JW705
R630
C629
JW704
L778
R629
R622
C621
R616
Q620
Q321
Q320
Q325
R323
D320
JW677
JW614
JW636
JW635
C644
JS611
R654
C655
R604
C605
JS712
IC700
JW870
JW746
JW745
JS610
JSH550
JW618
R757
JW621
R756
R758
JW620
JW667
JS566
JW672
C657
JW671
JW622
R657
JS568
D661
C661
Q661
R663
R664
R665
Q662
JW681
L678
R666
R674
R680
Q670
D670
JW664
R765
Q762
R763
R764
Q761
C761
JW665
C608
BCE
BCE
BCE
BCE
BCE
BCE
JW616
JW619
JS608
Q601
R615
Q612
R613
Q611
R614
R620
C607
JS612
JW615
JW617
R607
R606
C757
C758
JW623
IC600
C602
C654
C351
CL001
IC352
C400
J405
J404
JR406
JW801
JW864
CN434
CNP500
US,CND MODEL
R488
R487
JW838
JR435
JW834
AEP,TH MODEL
JW819
JS459
JS409
JS401
JW807
R3013
JS3002
JS3001
CNP430
JW871
JW832
JW846
JW841
JS41
1
JS400
CC59
CC09
JW861
CC51 CC01
R451
R401
W002
JS461
JS458
JS408
R453
R403
CC55
CC08
R455
R405
R466
R454
JW843
JW852
JW837
JW836
JS473
JW804
C352
JW803
C651
C601
C656
JW768
R653
R651
R652
C652
R602
C604
JW835
C744
C546
R327
D326
JS600
JS604
JS605
D327
D325
R326
JW696
JW695
JW756
JW755
C753
JW769
JW747
C603
JW741
JW739
JW738
JW716
JW718
R673
JW717
R670
R672
R671
C670
JW740
JW714
R662
R759
Q651
R660
C659
R661
R678
C679
R760
Q751
R761
C759
R762
R609
R679
JW713
JW712
JW749
JS71
1
C752
R701
R601
R702
C706
C701
C751
C756
JW839
JS609
JW707
R771
C770
D770
R772
R773
JW684
JW708
R774
Q770
R770
C771
D761
R766
R779
R778
C779
R780
JS606
Q324
Q323
R320
R325
D61
1
R608
D620
R621
C620
R628
JS607
JW715
JW706
R624
R623
JW700
JW751
JS710
JW758
JW794
JW795
JW802
CC53
CC03
JW842
JW831
JS573
JW752
R553
C552
JW817
CNP410
JW737
JS556
C653
R555
JW825
R450
R449
JW731
C449
C450
JW601
JS569
JS570
JS572
R579
R578
L578
C579
R659
C658
JW670
JS567
D570
JS550
JW721
JW720
JS571
R574
R573
B C E
B C E
B C E
B C E
E C B
B C E
R571
R580
D561
R566
C557
R559
R561
R560
C558
C559
JS559
JS560
JW814
JR322
JW816
JW860
JW815
R301
1
R459
R3010
C3024
JW813
R3012
C3027
C3027
C459
C3026
R3023
R3020
R3021
TB601
1
3
1
5
1
5
1
CNP921
5
1
3
CNP930
1
3
4
1
3
1
1
2
3
3
2
1
1
6
15
14
1
2
1
2
15
14
15
1
14
2
15
1
14
2
1
4
1
CN500
CNP500
4
1
1
3
8
CN350
1
8
15
1
13
1
1
1
80
60
61
20
21
40
41
4
B C E
B C E
B C E
B C E
B C E
B C E
B C E
B C E
B C E
B C E
B C E
B C E
E C B
B C E
B C E
B C E
B C E
B C E
B C E
B C E
E C B
E C B
E C B
E C B
E C B
E C B
E C B
B C E
A
DIGITAL
BOARD
CNS501
B
DIGITAL
BOARD
CNS502
K
T901
POWER
TRANSFORMER
(MAIN)
GRY
GRY
GRY
GRY
BLU
GRY
GRY
BLU
J
STANDBY
BOARD
CN912
GRY
GRY
GRY
RED
E
H
VIDEO
BOARD
CNP203
DCAC
BOARD
CN2000
CN2000
BLK
GR
Y
GR
Y
GR
Y
BLK
GR
Y
GR
Y
RED
GR
Y
GR
Y
C
DIGITAL
BOARD
CNP503
RED
BLU
BLK
YEL
ORG
L
T901
POWER
TRANSFORMER
(MAIN)
RED
GRY
GRY
GRY
GRY
BLU
GRY
GR
Y
GR
Y
BLU
GR
Y
I
DISPLAY
BOARD
CN108
D
DIGITAL
BOARD
CNP505
AEP
MODEL
AEP
MODEL
AEP
MODEL
AEP
MODEL
AEP
MODEL
AEP MODEL
AEP MODEL
AEP MODEL
AEP MODEL
AEP MODEL
CN434
6
1
G
XM
BOARD
CN102
(US,CND)
GR
Y
GR
Y
GR
Y
GR
Y
BLU
US,CND MODEL
1
4
CNP790
TP790
BT700
JW700
JW701
CL071
CL072
CL073
CL074
C791
CNP430
WHT
BLK
RED
RED
F
VIDEO 2
BOARD
CNP201
1
4
5-8. PRINTED WIRING BOARDS – MAIN Section –
•
: Uses unleaded solder.
• See page 16 for Circuit Boards Location.
Q812
G-12
Q820
F-11
Q851
G-10
Q852
G-10
Q853
G-10
Q854
G-11
Q861
G-11
Q862
G-10
Q870
G-10
Q930
D-12
Q753
G-5
Q754
G-6
Q761
G-6
Q762
G-6
Q770
F-6
Q801
G-12
Q802
G-12
Q803
G-11
Q804
G-12
Q811
G-12
Q670
F-4
Q701
G-9
Q702
G-9
Q703
G-8
Q704
G-9
Q711
G-9
Q712
G-9
Q720
F-8
Q751
G-6
Q752
G-6
D301
C-6
D320
F-7
D325
F-8
D326
F-7
D327
F-8
D350
D-10
D352
D-6
D355
C-9
D360
D-8
D365
D-10
D370
C-7
D375
F-12
D500
E-9
D501
D-8
D561
F-2
D570
F-3
D611
F-7
D620
F-7
D661
F-4
D670
F-4
D711
F-8
D720
F-9
D761
F-5
D770
F-6
D811
G-11
D820
F-12
D861
G-10
D870
F-10
D921
C-12
D930
D-13
D931
D-12
D940
E-13
D941
E-13
D942
D-12
D943
D-13
IC350
C-6
IC352
C-6
IC400
D-3
IC500
E-3
IC565
D-8
IC600
E-4
IC700
D-6
IC800
D-7
IC3002 B-2
Q301
C-6
Q320
F-7
Q321
F-7
Q323
F-7
Q324
F-7
Q325
F-8
Q350
D-10
Q355
C-9
Q360
C-8
Q365
D-10
Q370
C-7
Q375
F-12
Q500
E-9
Q501
D-9
Q551
G-2
Q552
G-2
Q553
G-2
Q554
G-3
Q561
G-3
Q562
G-3
Q570
F-2
Q601
G-7
Q602
G-7
Q603
G-7
Q604
G-8
Q611
G-7
Q612
G-7
Q620
F-7
Q651
G-4
Q652
G-4
Q653
G-4
Q654
G-4
Q661
G-5
Q662
G-4
Ref. No. Location
• Semiconductor Location
Ref. No. Location
Ref. No. Location
Ref. No. Location
Ref. No. Location
Ref. No. Location
Ref. No. Location
Ref. No. Location
Ref. No. Location
Ref. No. Location
Ref. No. Location
(Page 30)
(Page 30)
(Page 34)
(Page 40)
(Page 42)
(Page 34)
(Page 30)
(Page 45)
(Page 45)
(Page 45)
(Page 30)
(Page 43)
Ver. 1.1
STR-DG720
STR-DG720
26
26
4
J
A
C
9
G
I
3
6
D
E
F
8
7
5
10
B
11
2
K
H
1
A
DIGITAL
BOARD
CNS501
(3/3)
B
CNS502
(3/3)
BOARD
DIGITAL
MAIN
BOARD
(2/3)
1
MAIN
(2/3)
2
BOARD
MAIN BOARD (3/3)
3
CNP201
F
VIDEO 2
BOARD
BOARD
G
CN102
XM
IC B/D
6.9
0
0
0
0
0
0
-6.9
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-6.9
0
0
6.9
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0.7
AEP MODEL
AEP MODEL
AEP MODEL
AEP,TH MODEL
(US,CND)
US,CND MODEL
R3010
47k
0.5%
R3011
47k
C3037
1
C3032
1
C3027 1
0.5%
R3012
47k
R3013
47k
0.5%
R3021
47k
0.5%
R3022
47k
50V
C3024
4.7
50V
C3034
4.7
C3025
0.1
C3022 1
R3020
47k
C3026
0.1
8
7
6
5
4
3
2
1
NJM4565M(TE2)
IC3002
CC02
100p
50V
C409
4.7
R451
1k
R402
1k
C400
2200p
R466
1k
R459
1k
R470
47k
R409
1k
RY301
12V
2SC3052EF-T1-LEF
Q301
RELAY DRIVER
50V
C471
4.7
CC01
100p
CC51
100p
CC09
100p
R401
1k
R467
100k
R452
1k
CC59
100p
R453
1k
CC03
100p
CC53
100p
R403
1k
R454
1k
CC04
100p
CC54
100p
R404
1k
C403
2200p
R405
1k
50V
C458
4.7
R455
1k
R408
1k
CC05
100p
CC08
100p
50V
C408
4.7
CC58
100p
CC55
100p
R458
1k
C405
2200p
0.1
C489
100p
C449
0.1
C499
100p
C450
JR434
0
JR435
0
C430 220p
C431 220p
R301
2.2k
MA2J1110GLS0
D301
1
2
3
4
5
6
7
8
9
10
11
12
13
CNP410
13P
VOL IC CLK
VOL IC DATA
VACS CTRL
PROTECTOR
+7V
-7V
FR OUT
AGND
FL OUT
SW
AGND
C OUT
SR OUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
CNP411
15P
AGND
SL OUT
+7V
SBR OUT
SBL OUT
FL IN
AGND
FR IN
TUNER R
AGND
TUNER L
DMPORT L-
DMPORT R-
DMPORT L+
DMPORT R+
R3023
47k
R302
100
R303
100
1
3
4
CNP430
3P
VID2_AU_L
VID2_AU_GND
VID2_AU_R
R430 1k
R431 1k
JS409
JS410
JS411
JS461
JS459
JS460
JS400
JS470
JS471
JS472
JS473
1k
R449
1k
R450
JS408
JS458
JR406
0
JS3002
JS3037
JS3022
JS3001
R304
47k
JS401
1
3
4
5
6
3
4
5
6
CN434
5P
XMR
XMGND
XML
-7V
+7V
XMGND
XML
-7V
+7V
JS432
R487
2.2
R488
2.2
25V
C487
47
25V
C488
47
1234
56789
10
11
12
13
14
15
16
17
18
19
20
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
BD3471KS2
IC400
GND
HPFN
LPF01
LPF02
LPFN2
LPFN1
LPFN1
SWVOL
VCC
DGND
DATA
CLK
VEE
FROUT
FLOUT
SWOUT
COUT
SROUT
SLOUT
SBROUT
SBLOUT
GND
GND
RECL4
RECR4
RECL3
RECR3
RECL2
RECR2
RECL1
RECR1
GND
INL16
INR16
INL15
INR15
INL14
INR14
INL13
INR13
GND
INL12
INR12
INL11
INR11
INL10
INR10
INL9
INR9
INL8
INR8
INL7
INR7
INL6
INR6
INL5
INR5
INL4
INR4
INL3 (DCAC_MIC)
INR3 (DCAC_MIC)
INL2 (DMPOR
T_L)
INR2 (DMPOR
T_R)
INL1 (TUNER_L)
INR1 (TUNER_R)
GND
SBLIN
SBRIN
SLIN
SRIN
CIN
SWIN
LIN
RIN
GND
ROUT
LOUT
GND
ROUT
SUB
LOUT
SUB
GND
A_GND
OUT_FR_1
OUT_FL_1
OUT_FL_1
OUT_C_1
OUT_SR_1
OUT_SL_1
OUT_SR_1
OUT_SL_1
OUT_SBL_1
PROTECTOR
SW_PREOUT_RY
SW_PREOUT_RY
OUT_SBR_1
+15V
+/-15V_GND
SACD_RET_GND
SYSTEM_GND_+_WIRE
-7V
+7V
CC52
100p
G
J401
6P
G
J405
1P
G
J404
4P
50V
C459
4.7
G
J403
4P
MAIN BOARD (1/3)
ELECTRICAL VOLUME
IC400
DMPORT AMP
IC3002
+
- +
-
VCC
VEE
L
R
IN
SA-CD/CD/CD-R
L
R
IN
TV
L
R
AUDIO IN
SAT
L
R
L
R
AUDIO OUT
AUDIO IN
VIDEO 1
AUDIO OUT
SUB WOOFER
-1
-2
-3
-4
-5
-6
-1
-2
-3
-4
R
OUT
L
DVD
R
AUDIO IN
L
-4
-1
-3
-2
5-9. SCHEMATIC DIAGRAM – MAIN Section (1/3) –
• See page 48 for IC Block Diagrams.
(Page 35)
(Page 27)
(Page 41)
(Page 27)
(Page 33)
(Page 33)
(Page 28)
Ver. 1.1
STR-DG720
STR-DG720
27
27
5-10. SCHEMATIC DIAGRAM – MAIN Section (2/3) –
• See page 48 for IC Block Diagrams.
17
14
12
4
B
E
3
5
15
2
K
11
10
9
6
D
A
13
8
7
F
C
1
J
G
L
M
H
I
18
16
1
(1/3)
MAIN
BOARD
C
(2/3)
CNP503
DIGITAL
BOARD
MAIN BOARD (3/3)
4
IC B/D
IC B/D
IC B/D
IC B/D
BOARD
(1/3)
2
MAIN
-55.3
55.3
55.3
1.2
-1.1
54.8
-0.3
-0.2
-0.2
-0.3
55
-1.1
1.2
0
55.3
55.3
-55.3
-1.1
54.8
-0.3
-0.2
-0.2
-0.3
55
-1.1
1.2
0
1.2
-0.3
-0.2
-0.2
-0.3
55
-1.1
1.2
0
1.2
55.3
55.3
-55.3
-1.1
54.8
-0.3
-0.2
-55.3
0
1.2
55.3
55.3
-55.3
-1.1
54.8
1.2
-1.1
-1.1
1.2
55.5
0
-1.1
-55.7
0
0.5
-0.6
-1.1
-1.1
1.2
55.5
0
-1.1
-55.7
0
-0.6
0.5
1.2
0
-1.1
-55.7
0
-0.6
0.5
1.2
-1.1
-1.1
1.2
55.5
0
-1.1
-55.7
0
-0.6
0.5
1.2
-1.1
-1.1
1.2
55.5
0
-1.1
-55.7
0
-0.6
0.5
1.2
-1.1
-1.1
1.2
55.5
1.2
-1.1
-1.1
1.2
55.5
0
-1.1
-55.7
0
-0.6
0.5
1.2
-1.1
-1.1
1.2
55.5
0
-1.1
-55.7
0
-0.6
0.5
0
0
-44.7
4
0
0
0
0
0
0
0
0
0
-44.7
0
0
0
-44.7
0
0
0
-44.7
0
0
0
0
0
-44.7
0
0
0
0
0
0
0
0
0
-44.7
0
0
0
-44.7
0
0
0
4
0
4
4
0
4
0
0
4
4
0
0.8
0.2
0.8
0.2
0.2
0.8
0.2
0.8
0.8
0.2
15.6
0
3.3
3.3
0
-47.1
-47.1
0
-55.9
2.9
-48.4
AEP MODEL
AEP MODEL
AEP MODEL
AEP MODEL
(EXCEPT TH)
(TH)
(TH)
2
2
2
2
2
2
2
2
2SA1163L-TE85L
Q562
2SC3052EF-T1-LEF
Q570
2SA1163L-TE85L
Q561
L578
123
MN2488-OPY
-MK
Q553
SBR +VE
B
C
E
2SA1115TP-EF
Q551
R563
0.22X2 5W
R579
10
R564
1.5k
R572
15k
R565
15k
123
MP1620-OPY
-MK
Q554
SBR -VE
B
C
E
R578
4.7
50V
C571
10
R556
2.2k
R580
47k
C561
220p
R558
560
R566
68k
R562
6.2k
C579
0.022
2%
R561
4.7k
R557
82k
25V
C557
47
500V
C559
47p
C570
0.01
500V
C558
47p
2SC3623ATP-LK
Q552
2SA1163L-TE85L
Q611
560
R658
500V
C609
47p
15k
R672
500V
C658
47p
2SA1115TP-EF
Q601
123
MN2488-OPY
-MK
Q653
C +VE
B
C
E
6.2k
R662
47k
R680
2.2k
R656
50V
C621
10
25V
C607
47
2SA1163L-TE85L
Q662
1.5k
R664
2SC3623ATP-LK
Q602
2SA1115TP-EF
Q651
R607
82k
L628
R614
1.5k
R622
15k
2%
R611
4.7k
R608
560
50V
10
C671
0.022
C679
82k
R657
C611
220p
2%
4.7k
R661
R628
4.7
0.022
C629
2SA1163L-TE85L
Q661
68k
R666
2SC3052EF-T1-LEF
Q670
123
MP1620-OPY
-MK
Q604
SBL
-VE
B
C
E
25V
47
C657
123
MN2488-OPY
-MK
Q603
SBL
+VE
B
C
E
10
R679
R629
10
R615
15k
123
MP1620-OPY
-MK
Q654
C -VE
B
C
E
R630
47k
L678
15k
R665
R663
0.22X2 5W
2SA1163L-TE85L
Q612
R606
2.2k
0.01
C670
R613
0.22X2 5W
2SC3052EF-T1-LEF
Q620
C620
0.01
R612
6.2k
220p
C661
R616
68k
2SC3623ATP-LK
Q652
500V
47p
C659
R678
4.7
2SA1163L-TE85L
Q711
560
R808
R813
0.22X2 5W
123
MN2488-OPY
-MK
Q803
SL
+VE
B
C
E
47k
R830
R863
0.22X2 5W
500V
C758
47p
2SA1163L-TE85L
Q862
2SA1115TP-EF
Q701
123
MN2488-OPY
-MK
Q753
R +VE
B
C
E
25V
47
C807
2%
4.7k
R811
47k
R780
82k
R857
2SA1115TP-EF
Q801
2%
68k
R854
2SA1163L-TE85L
Q762
1.5k
R764
2SC3623ATP-LK
Q702
2%
4.7k
R861
1.5k
R714
100p
C804
500V
C708
47p
0.01
C870
560
R708
50V
10
C771
123
MP1620-OPY
-MK
Q804
SL
-VE
B
C
E
220p
C711
2%
4.7k
R761
500V
3p
C805
25V
47
C857
68k
R766
2SC3052EF-T1-LEF
Q770
2%
68k
R704
1.5k
R814
2%
R805
22k
25V
47
C757
123
MN2488-OPY
-MK
Q703
L +
VE
B
C
E
10
R779
10
R729
1
9
8
7
6
5
4
3
2
15
14
13
12
11
10
UPC2581V-S
IC800
MUTE
+VOUT1
-VOUT1
COMP1
NF1
IN1
GND
IN2
NF2
COMP2
-VOUT2
+VOUT2
VCC
VCC
VEE
L878
15k
R815
500V
3p
C855
123
MP1620-OPY
-MK
Q754
R -VE
B
C
E
15k
R822
2SA1163L-TE85L
Q712
2.2k
R706
500V
C858
47p
2SC3052EF-T1-LEF
Q720
0.01
C720
1.5k
R864
2%
R705
22k
100p
C704
220p
C761
2SC3623ATP-LK
Q752
100p
C754
R778
4.7
560
R758
500V
47p
C709
0.01
C820
15k
R772
2SA1163L-TE85L
Q811
2SC3623ATP-LK
Q802
2%
68k
R754
100p
C854
2.2k
R856
0.022
C879
500V
47p
C809
2SA1163L-TE85L
Q812
2.2k
R756
2%
68k
R804
50V
10
C721
L828
123
MP1620-OPY
-MK
Q854
SR -VE
B
C
E
220p
C861
500V
3p
C705
25V
47
C707
68k
R816
2SA1115TP-EF
Q851
2SA1115TP-EF
Q751
50V
10
C821
10
R879
82k
R707
1
9
8
7
6
5
4
3
2
15
14
13
12
11
10
UPC2581V-S
IC700
MUTE
+VOUT1
-VOUT1
COMP1
NF1
IN1
GND
IN2
NF2
COMP2
-VOUT2
+VOUT2
VCC
VCC
VEE
L728
2.2k
R806
15k
R722
2%
4.7k
R711
10
R829
500V
C808
47p
0.022
C779
2SA1163L-TE85L
Q861
82k
R757
560
R858
R728
4.7
0.022
C729
2SA1163L-TE85L
Q761
123
MP1620-OPY
-MK
Q704
L -VE
B
C
E
6.2k
R862
500V
47p
C859
15k
R865
2SC3052EF-T1-LEF
Q870
15k
R872
68k
R866
47k
R880
15k
R715
L778
R878
4.7
6.2k
R812
15k
R765
2SC3623ATP-LK
Q852
R763
0.22X2 5W
0.01
C770
R713
0.22X2 5W
6.2k
R712
82k
R807
500V
3p
C755
50V
10
C871
123
MN2488-OPY
-MK
Q853
SR +VE
B
C
E
0.022
C829
68k
R716
R828
4.7
220p
C811
500V
47p
C759
2SC3052EF-T1-LEF
Q820
39k
R326
2SC3052EF-T1-LEF
Q324
50V
10
C325
2SA1163L-TE85L
Q323
10k
R327
6.8k
R325
2SC3052EF-T1-LEF
Q325
2SA1163L-TE85L
Q320
2SC3052EF-T1-LEF
Q321
1k
R328
100V
10
C546
1
R545
100V
10
C545
500V
C605
3p
500V
3p
C655
1
9
8
7
6
5
4
3
2
15
14
13
12
11
10
UPC2581V-S
IC600
MUTE
+VOUT1
-VOUT1
COMP1
NF1
IN1
GND
IN2
NF2
COMP2
-VOUT2
+VOUT2
VCC
VCC
VEE
R601
1k
50V
C601
10
2%
68k
R604
C602
100p
100p
C654
C604
100p
50V
C651
10
2%
R605
22k
1k
R651
100p
C652
2%
68k
R654
68k
R652
1k
R751
1k
R701
50V
C751
10
100p
C752
100p
C702
50V
C701
10
68k
R752
68k
R702
1k
R851
1k
R801
50V
C851
10
100p
C852
100p
C802
50V
C801
10
68k
R852
68k
R802
2.2k
R375
2SC3052EF-T1-LEF
Q375
RY375
12V
1
3
4
5
3
4
5
CN792
4P
HP DETECT
R-CH
GND
L-CH
R-CH
GND
L-CH
RY365
12V
2SC3052EF-T1-LEF
Q365
R365
2.2k
R730
47k
2SC3052EF-T1-LEF
Q360
RY360
12V
2SC3052EF-T1-LEF
Q355
RY355
12V
RY350
12V
2SC3052EF-T1-LEF
Q350
2.2k
R350
1k
R355
1k
R360
MA2J1110GLS0
D661
MA2J1110GLS0
D570
MA2J1110GLS0
D360
MA2J1110GLS0
D365
MA2J1110GLS0
D870
MA2J1110GLS0
D820
MA2J1110GLS0
D611
MA2J1110GLS0
D326
MA2J1110GLS0
D861
MA2J1110GLS0
D561
MA2J1110GLS0
D670
MA2J1110GLS0
D811
MA2J1110GLS0
D350
MA2J1110GLS0
D325
MA2J1110GLS0
D761
MA2J1110GLS0
D770
MA2J1110GLS0
D355
MA2J1110GLS0
D375
MA2J1110GLS0
D720
MA2J1110GLS0
D320
MA2J1110GLS0
D327
MA2J1110GLS0
D620
MA2J1110GLS0
D711
JR632
0
RY370
12V
MA2J1110GLS0
D370
2SC3052EF-T1-LEF
Q370
R370
2.2k
TB602
6P
RR13 10
CC13 0.01
RR14 10
CC14 0.01
10
RR11
0.01
CC11
0.01
CC12
10
RR12
0.01
CC15
10
RR15
0.01
CC16
10
RR16
10
RR17
0.01
CC17
RR18 10
CC18 0.01
RR19 10
CC19 0.01
22k
R720
22k
R670
22k
R870
22k
R770
22k
R820
22k
R620
22k
R570
50V
C644
10
50V
C844
10
50V
C744
10
R371
33
R372
47
R367
47
R366
33
47
R362
33
R361
47
R357
33
R356
47
R352
33
R351
47
R377
33
R376
JS390
2W
680
R393
2W
R392
680
500V
C603
33p
JS397
R771
R821
R621
22k
R824
R674
22k
R724
R624
22k
22k
R874
R574
22k
22k
R774
R573
47k
R773 47k
R873
47k
R723
47k
R673
47k
R823
47k
R623
47k
100
R760
100
R859
100
R709
100
R809
100
R810
100
R860
100
R710
100
R660
100
R659
100
R759
R560
100
R559
100
R610
100
R609
100
2%
R853
2.2k
2%
R703
2.2k
2%
R803
2.2k
2%
R753
2.2k
2%
R653
2.2k
2%
2.2k
R603
JS712
JS710
JS611
JS810
JS711
500V
C608
47p
6.2k
R762
JSH550
JS550
JS551
JS552
JS553
JS554
JS555
JS559
JS560
JS561
JS562
JS563
JS564
JS565
JS566
JS567
JS568
JS569
JS570
JS571
JS572
JS600
JS601
JS602
JS603
JS604
JS605
JS606
JS607
JS608
JS609
JS612
R602
68k
500V
C853
33p
500V
C803
33p
500V
C653
33p
500V
C703
33p
500V
C753
33p
JS350
JS395
JS393
JS394
JS392
JS391
10V
C606
220
10V
C756
220
10V
C856
220
10V
C656
220
10V
C806
220
JSH551
R373
47k
47k
R358
47k
R363
47k
R368
R353
47k
47k
R378
JS398
TB606
8P
10V
C320
330
10V
C323
330
R320
20k
R671
R721
R323
39k
R571
SW_PREOUT_RY
PROTECTOR
OUT_SBL_1
OUT_SL_1
OUT_SR_1
OUT_C_1
OUT_FL_1
OUT_FR_1
OUT_SBR_1
STK/UPC_-B
+B
SYSTEM_GND_+_WIRE
SACD_RET_GND
+7V
DETECT
+/-15V_GND
+15V
-B
R871
JS511
2%
R555
22k
R552 68k
500V
C555
3p
2%
R553
2.2k
C552 100p
JS556
JS558
500V
C553
33p
2%
R554
68k
JS557
R551
1k
50V
C544
10
JS610
10V
C556
220
1
9
8
7
6
5
4
3
2
15
14
13
12
11
10
UPC2581V-S
IC500
MUTE
-VOUT1
+VOUT1
COMP1
NF1
IN1
GND
IN2
NF2
COMP2
-VOUT2
+VOUT2
VCC
VCC
VEE
50V
C551
10
C554
100p
JS573
TB601
4P
10V
C706
220
1
3
4
5
6
7
8
CN350
7P
1
2
3
4
2
3
4
CNP790
4P
C791
0.1
J790
(CHASSIS)
MAIN BOARD (2/3)
PRE DRIVER
IC500
IC600
PRE DRIVER
IC700
PRE DRIVER
IC800
PRE DRIVER
Q551-554,601-604,651-654,701-704,
Q751-754,801-804,851-854
Q751-754,801-804,851-854
POWER AMP
Q561,562,611,612,661,662,711,712,
Q761,762,811,812,861,862
Q761,762,811,812,861,862
CURRENT DETECT
Q570,620,670,720,770,820,870
OVERLOAD DETECT
Q350,355,360,365,370,375
RELAY DRIVER
-
-
-
+
+
+
R
L
FRONT A
-
+
CENTER
+
-
+
-
L
R
SURROUND
Q320,321,323-325
PROTECTOR
SBR RY
FRONT A RY
SW PREOUT RY
FRONT B RY
C/SUR/SBL RY
HP RY
HP DETECT
FRONT A RY
SW PREOUT RY
FRONT B RY
C/SUR/SBL RY
HP RY
HP DETECT
R-CH
HP DETETCT
TP790
HEADPHONE BOARD
PHONES
L-CH
GND
R
FRONT B
+
-
IMPEDANCE USE 8-16Ω
-
SPEAKERS
+
L
R
L
-
+
SURROUND BACK
-
+
4.7k
12k
12k
R571,621,671,721,771,821,871
(Page 28)
(Page 26)
(Page 26)
(Page 32)
Ver. 1.1
STR-DG720
STR-DG720
28
28
5-11. SCHEMATIC DIAGRAM – MAIN Section (3/3) –
E
1
G
7
B
9
5
D
A
3
10
6
C
2
4
8
F
BOARD
CN2000
CN2000
H
DCAC
VIDEO
E
CNP203
BOARD
BOARD
STANDBY
J
CN912
D
CNP505
(2/3)
DIGITAL
BOARD
POWER TRANSFORMER
(MAIN)
K
CN108
DISPLAY
I
BOARD
L
T901
POWER TRANSFORMER
(MAIN)
T901
3
MAIN BOARD (1/3)
MAIN BOARD (2/3)
4
6.9
15.6
-16.5
-6.9
6.9
-5.5
-3.7
-5.5
6.3
-55.6
-55.7
-54.8
6.2
-5.5
-5.5
1.1
-6.9
-20.1
-20.6
-55.6
(US,CND)
(AEP,TH)
(AEP,TH)
1
1
AEP,TH MODEL
US,CND MODEL
100V
0.22
C920
100V
0.22
C921
10k
R503
220k
R507
2SC1815GR-TPE2
Q500
10k
R504
8765
4
3
2
1
NJM4565M(TE2)
IC565
470k
R502
10k
R505
0.1
C500
1
R546
2SB734-T-34
Q930
RELAY DRIVER
100V
0.1
C933
35V
47
C931
4.7
R932
22k
R930
PTZ-TE25-5.6B
D930
10k
R931
35V
47
C932
1SR154-400TE-25
D352
0.47
C350
0.47
C352
1SR154-400TE-25
D943
0.47
C940
16V
3300
C904
0.47
C941
1SR154-400TE-25
D941
1SR154-400TE-25
D940
1SR154-400TE-25
D942
E
ET902
1
3
4
3
4
CN500
3P
+15V
GND
-15V
RT1P241C-TP-1
Q501
MA2J1110GLS0
D501
JS922
JS920
1
3
5
CNP921
3P
R1 (UPPER TAP)
R1 GND
R1 (UPPER TAP)
1
2
3
2
3
CNP500
3P
+7V
GND
-7V
MAZ8200GMLS0
D931
~
~
D5SBA20-4003
D921
RECT
C923
71V
10000
C922
71V
10000
JS510
2W
R510
100
MAZ8300GMLS0
D500
10k
R501
R506
47k
R511
I
O
G
TA7807S
IC350
I
O
G
TA79007SB
IC352
1
2
3
3P
CNP930
-20V
F1
F2
1
2
3
4
5
6
7
2
3
4
5
6
7
7P
CNP912
R2 RETURN GND
HP_GND(NC)
-15V
STBY GND
R2 GND
+15V
HP_GND(NC)
-15V
STBY GND
R2 GND
+15V
1
2
3
2
3
3P
CN941
GND (R4)
+7V (R4)
GND (R4)
+7V (R4)
GND (R4)
JS930 35V
47
C930
C900
0.1
1/2W
0.15
R940
16V
100
C353
16V
100
C351
+15V
+/-15V_GND
DETECT
+7V
SACD_RET_GND
SYSTEM_GND_+_WIRE
-B
+B
STK/UPC_-B
+7V
-7V
SYSTEM_GND_+_WIRE
SACD_RET_GND
+/-15V_GND
+15V
1
6
2
3
4
5
6P
CNP940
F2
NC
GND
F1
R4 -AC
R4 +AC
MAIN BOARD (3/3)
IC350
+7V REG
-7V REG
IC352
OVERLOAD DETECT AMP
IC565
+
VEE
-
-
+
VCC
1
3
2
1
2
3
Q500,501
B- SWITCH
NC
D940-943
RECT
330 2W
470 2W
470 2W
R511
(Page 27)
(Page 26)
(Page 35)
(Page 42)
(Page 46)
(Page 32)
(Page 44)
(Page 46)
(Page 46)
Ver. 1.1
Click on the first or last page to see other STR-DG720 service manuals if exist.