Sony STR-DB798 Service Manual ▷ View online
STR-DB798
33
33
STR-DB798
R388
C374
C375
C376
L371
R376
C368
R374
C372
C373
R375
R377
C369
R363
L370
C371
C378
C352
C380
R378
C381
C379
L376
100
µH
C384
C353
C382
C367
C366
C356
C387
C385
C357
C383
C389
L372
C390
C386
L373
L377
C377
C362
FB354
C391
C392
R386
R365
R366
C393
C396
C397
FB353
C395
R387
C394
C398
R382
C364
C363
L374
R383
C365
R379
R389
C399
C360
R390
C361
R391
R373
R367
IC370
L375
IC372
X371
R392
IC371
C952
C956
C955
C953
R959
R313
R301
R302
R303
C308
C310
C311
C309
C312
R307
R308
R309
C350
R306
R305
R304
C954
Q955
Q956
R955
R956
Q957
R954
Q953
IC952
IC1304
C313
Q954
CNP3052
R368
R369
C388
C354
L378
C355
CN3801
R393
R394
Q372
R384
C358
R385
Q373
Q371
R359
R358
JW300
IC951
CN919
CN918
390
470
10V
10V
22
50V
47
10V
1k
4.7
50V
C317
47
16V
1M
12p
22p
3.9k
820
0.1
1M
22p
0.1
0.1
0.01
820
0.01
180p
0.1
100
10V
10V
0.1
0.01
0.1
0.01
0.01
0.01
0.01
100
10V
0.1
100
10V
10V
100
10V
10V
0.1
470
10V
10V
47
10V
0.1
10k
100
100
15p
4.7
50V
50V
0.01
0.01
10k
2.2
50V
50V
56p
1.2k
12p
22p
1.8k
47
10V
820
390
10
50V
560p
1M
390p
15k
820
10k
TC90A69N
NJM2268D
47 16V
470
16V
16V
C3803
100
16V
16V
C3801
100
16V
16V
0.22
0.22
10k
1k
75
75
75
1 50V
1 50V
1 50V
1 50V
1 50V
75
75
75
0.01
C331
0.1
C3804
0.1
C328
47
16V
C330
0.1
C3802
0.1
75
75
75
0.1
DTC124ESATP
DTC124ESATP
680
10k
2SB733
1k
2SD773
7805
NJM2586M
1 50V
DTA114TSA
11P
3.3k
3.3k
0.01
0.01
0.1
50V
50V
11P
12k
12k
2SC1740TP
3.9k
12p
820
2SC1740TP
2SC1740TP
1k
1k
79005
6P
6P
SW1
SW2
PS
V-POWER
V-POWER
SW1
SW2
PS
∗
∗
∗
SW4
SW3
+5V
GND
V
Y
C
NC
NC
NC
∗
VIDEO AMP
BUFFER
Y SYNC
BUFFER
C SYNC
BUFFER
VIDEO
L375
22
µH
33
µH
∗
3.5795MHz
4.43MHz
∗ IC371
X371
MM1093NF
MM1093PFB
(AEP,UK)
(TW)
4.7k
5.6k
CLOCK GENERATOR
O
SC R
N
C
FSC
OUT
GND
2
GND
1
X'TAL
APC1
FILTER
FILTER
ACC
CH
ROMA
IN
VCC 1
VCC 2
OSC C
FILT
ER
A
PC2
OUT
4FSC
FILTE
R
BUR
ST G
ATE
IN
COMPOSITE
VIN2
VOUT1
VIN1
GND
VSAG1
VOUT2
NC
V+
Y
COMPONENT
VIDEO
J301
VIDEO SYNC
SEPARATOR
-5V
INPUT SELECT
+5V REGULATOR
G
I
O
-5V REGULATOR
Q953-957
B+ SWITCH
B-Y
P
B
/ C
B
/
B-Y
P
R
/ P
R
/
MONITOR
OUT
DVD IN
TV/SAT
IN
ASSIGNABLE
SCL
SDA
V-POWER
+8V
-8V
GND
PS SAVE-
SW1-
SW2-
PNR
RESET
(TW)
(AEP,UK)
(CHASSIS)
G
O
I
(TW)
(AEP,UK)
(ARP,UK)
(TW)
100
µH
100
µ
H1
0
0
µ
H
27
µH
27
µH
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
6-20. SCHEMATIC DIAGRAM – COMP-V BOARD –
(Page 25)
(Page 43)
(Page 35)
(Page 31)
•
See page 52 for Waveforms.
•
See page 53 for IC Block Diagrams.
STR-DB798
34
34
STR-DB798
6-21. PRINTED WIRING BOARD – AU-IN BOARD –
CN132
JW101
JW102
JW103
JW104
JW105
JW106
JW
107
JW108
JW109
JW110
JW111
JW112
JW113
JW114
JW115
JW117
JW118
JW119
JW120
JW121
JW122
JW123
JW124
JW125
JW126
JW127
JW128
JW129
JW130
JW131
JW132
JW133
JW134
JW136
JW138
JW139
JW141
JW143
JW147
JW149
JW151
JW153
JW155
JW156
JW157
JW158
JW159
JW160
JW162
JW164
JW165
JW166
JW168
JW169
JW170
JW171
JW172
JW175
JW176
JW177
JW178
JW179
JW180
JW181
JW182
JW183
JW184
JW185
C161
JW174
JW173
JW167
JW163
JW161
R171
R173
R172
R178
R181
C121
R184
C137
C138
C151
C152
C153
C154
C155
C156
C175
R119
J131
IC101
IC110
IC111
IC112
IC131
C174
R110
R101
R103
R104
R105
R106
R112
C120
R114
R102
R145
R143
R175
R113
R187
R186
R185
R182
J151
R183
R177
R176
R174
R156
R155
R154
R153
R152
R151
R148
R147
R146
R144
R142
R141
R140
R139
R138
R137
R136
R135
R134
R133
R131
C133
R115
C132
C131
C122
C101
CN103
CN102
C102
C103
C104
C105
C106
C107
C123
IC171
IC172
C134
JW137
JW140
JW142
JW144
JW116
JW211
JW212
JW202
JW186
J101
JW150
JW152
JW135
JW221
JW222
JW223
R157
R158
R149
R150
CN104
CN105
C139
C135
C136
C140
C146
C145
C143
C144
C141
C142
C171
C181
C110
C111
C112
C113
C114
C115
R111
IC173
R845
R840
R
L
(CHASSIS)
R
L
R
L
R
L
FRONT
R
L
SURR
R
L
SUB WOOFER
CENTER
AUDIO
MULTI CH IN
AUDIO
(CHASSIS)
(CHASSIS)
PHONO
IN
MD/TAPE
IN
MD/TAPE
OUT
SA-CD/CD
IN
MAIN BOARD
CN405
15
MAIN BOARD
CN404
14
1
14
28
15
5
8
4
1
5
8
4
1
5
8
4
1
5
8
4
1
5
8
4
1
5
8
4
1
1
21
42
22
COMP-V BOARD
CN919
63
MAIN BOARD
EB403
45
AU-IN BOARD
1-867-417-
11
(11)
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
9
10
11
(NC)
(Page 32)
(Page 36)
(Page 36)
(Page 36)
•
See page 19 for Circuit Boards Location.
: Uses unleaded solder.
•
Semiconductor
Location
Location
Ref. No. Location
IC101
E-6
IC110
C-6
IC111
B-4
IC112
B-2
IC131
C-8
IC171
G-2
IC172
C-2
IC173
E-3
STR-DB798
35
35
STR-DB798
R175
IC111
IC110
R114
R115
R113
R112
R111
R110
R177
R176
R173
R174
IC112
R181
R186
R184
R183
R182
IC172
IC173
R178
C175
IC171
R172
R171
R119
C123
C122
IC101
C121
C120
R840
R845
C174
R143
R144
R146
R145
R139
C143
C141
R137
R141
C137
R135
C144
C142
R140
R138
R142
R136
R133
R147
R148
R134
C138
R156
R155
R154
R153
R152
R151
R101
R102
R103
R104
R105
R106
J131
J151
J101
CN102
CN103
C145
C146
C139
C140
C135
C136
C131
C133
C134
C132
R187
R185
R131
R132
C107
CN132
IC131(1/2)
IC131(2/2)
C171
C161
C102
C101
C103
C106
C105
C104
R158
R157
C110
C111
C112
C113
C114
C115
C181
R149
R150
CN104
CN105
10k
M5218AP
M5218AP
47k
47k
47k
47k
47k
47k
10k
10k
4.7k
15k
M5218AP
10k
10k
15k
4.7k
15k
M5218AP
TC9273F-012
1k
100p
M5218AP
15k
10k
1k
100p
0.022
TC9274N-017
0.022
0.01
33
33
0.01
100k
100k
470
470
100k
0.033
0.0091
8.2k
100
100p
180
0.033
0.0091
100k
8.2k
100
180
100k
100k
100k
100k
100p
1k
1k
2.2k
2.2k
1k
1k
1k
1k
1k
1k
1k
1k
4P
4P
6P
20P
20P
2.2
50V
50V
2.2
50V
50V
220
10V
10V
220
10V
10V
2.2
50V
50V
2.2
50V
50V
100P
220P
220P
100P
10k
10k
2.2k
2.2k
2200p
M5218AP-22
M5218AP-22
100
50V
50V
0.01
100p
100p
100p
100p
100p
100p
220
220
100
25V
25V
100
25V
25V
100
25V
25V
100
25V
25V
100
25V
25V
100 25V
100
25V
25V
220
220
6P
6P
A1
A2
A3
A4
A5
A1
A2
A3
A3
A4
A4
A5
A5
B1
B2
B3
B4
B5
B6
B7
B8
B9
B1
B2
B3
B4
B5
B6
B7
B8
B9
B0
B0
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
SOURSE-L
SOURSE-R
C
SR
SL
FRONT-R
TUNER-R
TUNER-L
FRONT-L
+15V
-15V
GND
FUN-LAT
DATA
CLK
SR
GND
SL
GND
GND
GND
GND
GND
C
SW
FRONT-R
FRONT-L
GND
GND
GND
GND
GND
GND
GND
SW
GND
GND
L
R
GND
LAT
DAT
CLK
VSS
VDD
NC
GND
(CHASSIS)
(CHASSIS)
(CHASSIS)
GND
AUDIO SELECTOR
VSS
VDD
LINE AMP
LINE AMP
LINE AMP
VSS
VDD
AUDIO SELECTOR
R
L
PHONO IN
R
L
MD/TAPE IN
R
L
R
L
MD/TAPE OUT
R
L
R
L
FRONT
SURR
SUB WOOFER
CENTER
MULTI CH IN
BUFFER
BUFFER
PHONO EQ
AMP
SA-CD/CD IN
AUDIO
AUDIO
(NC)
6-22. SCHEMATIC DIAGRAM – AU-IN BOARD –
(Page 37)
(Page 38)
(Page 33)
(Page 37)
•
See page 53 for IC Block Diagrams.
STR-DB798
36
36
STR-DB798
R552
JW001
JW002
JW
0
03
JW
004
JW005
JW006
JW007
JW
00
9
JW010
JW
0
1
1
JW012
JW013
JW015
JW016
JW020
JW
0
2
1
JW
022
JW028
JW029
JW030
JW035
JW
04
0
JW042
JW043
JW046
JW047
JW048
JW049
JW050
JW051
JW052
JW053
JW
0
64
JW
08
6
JW089
JW
0
91
JW092
JW093
JW096
JW097
JW
10
1
JW
1
02
JW
104
JW
1
05
JW
1
11
JW
1
12
JW113
JW114
JW
1
15
JW117
JW
1
18
JW
119
JW
120
JW125
JW126
JW127
JW
1
28
JW
129
JW
13
2
JW133
JW144
JW
14
5
JW
146
JW
147
JW153
JW159
JW161
JW163
JW
1
64
JW165
JW167
JW169
JW
17
2
JW
17
3
JW
174
JW
1
77
JW
1
78
JW
17
9
JW
1
80
JW
181
JW
1
82
JW
183
JW
184
JW
185
JW
18
6
JW
187
JW
1
88
JW
18
9
JW
191
JW193
JW194
JW
195
JW
1
96
JW
198
JW199
JW200
JW201
JW202
JW
203
JW
204
JW
207
JW210
JW215
JW
217
JW
220
JW221
JW
2
24
JW233
JW234
JW237
JW238
JW239
JW243
JW245
JW252
JW254
JW271
JW
071
R502
JW
192
JW
190
JW027
R516
C
N
40
4
C
N
40
5
C
N
40
3
C
N
4
02
C
N
406
C
N
408
R807
Q531
CN
41
1
R563
CN421
CN421
CN432
CN482
CN532
CN582
CN632
CN682
CN401
CN401
CN651
CN651
CN
41
2
Q681
R435
Q631
R413
R431
C
N
4
53
Q532
R
436
R432
Q401
R485
Q481
CN455
R481
R4
39
R
4
86
R482
Q
433
R635
R463
R462
R6
19
R631
C43
2
R
6
36
R632
Q
48
3
C8
16
R685
R493
R613
EB403
RV581
Q
823
R612
C
632
R
63
9
C
482
R464
R
68
6
R682
Q
633
R824
R663
Q803
R662
R665
D819
D818
R531
R
69
3
IC502
R586
R536
R532
Q
683
R513
R535
R
5
43
R582
R581
R401
R
601
R701
R
551
R651
C
821
R
826
Q
651
Q551
Q501
Q701
Q751
Q601
D411
R
419
IC804
IC805
Q553
Q552
R585
R587
R
589
R
41
5
R569
Q652
Q533
Q653
R512
RV531
Q682
R404
RY806
CN424
RV631
Q503
Q502
C
813
R
403
R402
R
60
4
Q824
C419
R
519
R752
R602
R
553
IC602
R603
C6
1
9
R
50
3
R
6
54
R653
R702
IC652
C669
R652
R514
Q602
Q603
RV431
R
515
R664
Q452
Q453
R
437
D561
R615
R614
C613
Q402
Q403
R
4
58
C
56
3
CN501
R
504
CN425
RV681
R
753
R851
R4
4
3
Q
807
R703
GP801
RV481
R564
R
46
9
R825
D815
R489
D820
D812
R852
C519
R
71
9
Q
81
3
R451
C
502
R
8
15
Q451
R457
C
812
D816
CN415
CN419
Q582
R827
C
N
4
07
Q810
R839
R
7
82
R838
Q581
R
66
9
Q431
Q632
Q
482
R
562
Q432
R4
38
R4
87
R416
Q
808
Q
809
Q811
R
81
3
R
848
R
81
8
R
81
7
R
816
R
81
4
R821
R820
C
413
R715
C
6
82
D
581
R
5
88
R
5
39
R
538
R537
R819
D
8
14
R
849
R8
05
Q802
D
80
5
D808
D807
D
81
7
R8
0
6
Q732
R
802
CN417
R
5
93
D
6
81
R
6
88
R
68
9
D
73
1
D
631
R
6
37
R
64
3
R
6
87
Q805
R
63
8
CN422
D
8
22
C582
R853
D461
D511
D
611
D
6
6
1
C663
C713
R
666
C
N41
0
R414
R
828
Q583
R466
R
8
50
C
46
3
R566
R
5
65
Q
82
2
C
5
13
R
46
5
R
61
6
R716
D823
D
8
21
D711
JW
03
9
JW
04
1
JW
026
R
8
30
JWH001
JW
H
0
0
2
JW
H
003
JW
0
85
R
40
5
R
8
11
Q
58
4
Q534
Q
684
Q
63
4
Q484
Q434
JW107
CN601
CN601
JW
235
JW269
JW267
JW264
JW266
JW268
JW236
JW265
JW
21
9
JW157
JW263
JW262
JW158
JW154
JW155
JW143
JW
131
R681
JW261
JW156
JW142
JW
130
JW259
JW260
JW152
JW258
JW257
JW
018
JW
0
14
JW
0
23
JW
024
JW
025
JW
031
JW038
JW037
JW823
JW
123
R412
JW033
JW034
JW056
JW242
JW244
JW240
JW054
JW055
D431
JW247
JW246
JW063
JW248
D
48
1
JW062
JW275
JW057
JW061
JW250
Q702
Q703
R714
R712
R713
Q734
RV731
CN732
R735
Q733
R732
R736
C732
Q731
R
7
37
JW256
JW255
JW253
JW251
JW241
JW249
R
731
JW151
R
7
39
R
738
R
743
JW
124
JW
13
7
R
48
8
JW
136
JW
135
JW
134
JW060
JW059
JW058
JW277
JW276
JW278
JW
12
2
JW148
JW141
JW139
JW140
JW149
JW232
JW231
JW230
JWH006
JW
019
JW
08
4
JW121
JW
279
JW280
JW
2
81
JW282
JW283
JW284
JW285
JW
2
8
6
JW
28
7
JW
288
JW
289
JW
290
JW
29
1
JW
29
2
JW293
JW294
JW295
JW296
JW297
JW298
JW299
JW300
JW301
JW302
JW303
JW304
JW305
JW306
JW307
JW801
CN413
JW
35
2
IC954
JW
15
0
JW
0
67
JW
0
66
Q826
IC955
CN420
C817
C819
JW312
JW313
C
96
0
C962
IC402
JW
103
JW
308
JW
10
6
JW
35
6
JW357
JW358
JW359
JW361
JW
3
55
JW008
CN426
JW
1
75
JW
176
JW212
JW211
JW
2
06
JW
17
1
R
833
C
824
JW
1
70
JW
168
R
751
R
50
1
JW
160
JW
16
2
JW
16
6
JW
20
8
JW364
JW365
JW366
JW
367
JW
3
68
JW
369
JW
3
70
JW371
JW
3
73
C9
63
C
9
61
R
96
0
R
9
61
R841
R846
C
N
418
C
N
P41
9
R
847
R
812
JW380
JW381
JW824
JW100
JW098
JW099
JW138
CN488
JW
2
25
JW
2
23
D
531
C616
C666
C667
C617
C566
C567
C4
67
C41
7
C517
C
516
C46
6
C4
1
6
C71
7
C716
C
752
C702
C
552
C
6
0
2
C
4
57
C6
52
C402
C807
C805
C768
C751
C618
C601
C456
C468
C418
C401
C668
C651
C718
C701
C568
C551
C501
C518
C431
C481
C731
C631
C681
C531
C581
C814
C815
C818
C753
C822
C532
C
N
414
JW
372
JW
110
JW
10
9
JW
10
8
JW095
JW
1
1
6
JW094
JW087
R455
JW090
JW088
JW
362
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IC501
IC601
IC401
C
45
5
C4
05
C
655
C
605
C
55
5
C
505
C
604
C
705
1
1
1
3
1
3
8
10
1
10
1
10
SPK-A BOARD
CN448
23
SPK-A BOARD
CN449
26
HP-V3 BOARD
CN1091
11
S-VIDEO BOARD
CN851
12
VIDEO BOARD
CN301
7
1
3
1
3
DC PWR BOARD
CN907
36
VIDEO-AU BOARD
CN201
9
AU-IN BOARD
CN103
15
AU-IN BOARD
CN102
14
E
E
6
1
5
DC PWR
BOARD
CN909
25
SPK-B
BOARD
CN444
28
1
SPK-B
BOARD
CN443
24
2
1
1
3
1
3
DIGITAL
BOARD
CN1107
AU-IN BOARD
CN132
45
1
DC PWR BOARD
CN913
29
17
DIGITAL
BOARD
CN1112
53
1
3
DC PWR BOARD
CN910
30
STAY-5
BOARD
BOARD
CN178
77
DIGITAL
BOARD
CN1101
6
DIGITAL
BOARD
CN1102
5
2
1
2
1
2
1
12
11
2
1
12
11
2
1
2
1
6
5
12
11
2
1
10
9
A CLASS
BOARD
CN2401
19
CN501
A CLASS
BOARD
CN2301
22
CN651
A CLASS
BOARD
CN2201
18
CN601
A CLASS
BOARD
CN2101
21
CN401
A CLASS
BOARD
CN2001
31
CN421
CN501
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
B
C
E
B
C
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
FOR
ADJUSTMENT
FOR
ADJUSTMENT
FOR
ADJUSTMENT
2
1
FOR
ADJUSTMENT
2
1
FOR
ADJUSTMENT
2
1
FOR
ADJUSTMENT
1
2
2
1
FOR
ADJUSTMENT
MAIN BOARD
1-867-419-
11
(11)
E
E
E
E
E
E
E
E
E
E
E
E
1
1
4
8
5
14
28
15
1
1
4
8
5
14
28
15
1
1
4
8
5
1
4
8
5
14
28
15
1
14
28
15
-1
-2
1
14
8
14
8
1
7
7
E
A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
K
L
M
N
O
E
E
E
E
E
MAIN POWER
TRANSFORMER
T1
(NC)
6-23. PRINTED WIRING BOARD – MAIN BOARD –
(Page 48)
(Page 44)
(Page 44)
(Page 34)
(Page 21)
(Page 21)
(Page 50)
(Page 48)
•
See page 19 for Circuit Boards Location.
: Uses unleaded solder.
(Page 41)
(Page 48)
(Page 21)
(Page 21)
(Page 40)
(Page 40)
(Page 40)
(Page 40)
(Page 40)
(Page 34)
(Page 34)
(Page 28)
(Page 28)
(Page 48) (Page 30)
(Page 30)
(Page 44)
(Page 48)
Click on the first or last page to see other STR-DB798 service manuals if exist.