Sony STR-DB1070 / STR-DB870 Service Manual ▷ View online
STR-DB870/DB1070
33
33
6-18. SCHEMATIC DIAGRAM – S-VIDEO/VIDEO AU Boards –
•
See page 46 for IC Block Diagrams.
CN201
C213
C211
R211
CN202
C212
C201
G1
R201
R202
R251
R252
R203
R253
R204
R254
R255
R206
R205
R256
C202
G2
J202
CN753
D750
C769
C772
R771
R770
R774
R773
R767
R766
R768
R769
C765
C768
Q750
C766
R764
R765
R762
C764
R763
C758
R754
R755
R756
R757
C755
C759
C756
C767
C763
R760
R761
C760
C757
R759
R758
C753
C752
C762
C754
C761
R753
R750
R751
R752
J201
D751
CN751
IC752
IC750
JW750
JW751
IC751
R772
Q753
Q752
Q751
J756
J755
J754
J753
J751
J750
J752
IC201
C770
C750
C751
9P
100p
2200p
1k
3P
2200p
2200p
1k
1k
1k
1k
2.2k
2.2k
1k
1k
2.2k
1k
2.2k
1k
2200p
6P
4P
1SS133T
0.1
0.1
75
75
100
10k
10k
6.8k
6.8k
10k
470p
470p
BA1A4M
47
16V
4.7k
10k
75
0.1
75
10
50V
75
75
75
75
0.1
10
50V
0.1
0.1
0.1
75
75
10
50V
0.1
75
75
47p
47p
2200p
2200p
2200p
1k
1k
1k
1k
6P
1SS133T
NJM-2296D-
NJM-2296D-
NJM-2145D-
100
BN1A4M
BN1A4M
BN1A4M
TC9273-014
10
50V
47p
47p
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
A
1
0
A
1
1
A
1
2
*
C
C
Y
C
Y
Y
+5V
SW1
SW2
SW3
SW4
SIRCS OUT
MBUS-TV
MBUS-STATUS-OUT
MBUS-V1
VIDEO3
GND
GND
GND
MBUS-DVD
VIDEO3(Y)
VIDEO3(C)
-5V
VCC
OUT1
IN4
IN3
IN2
O3-1
O3-2
O3-3
O2-3
O2-2
O2-1
NC
IN1
INH2
INH1
GND
MONITOR-C/IN
MONITOR-C/OUT
MONITOR-Y/IN
MONITOR-Y/OUT
LOUT
ROUT
GND
15V
-15V
LAT
DATA
CLK
L
R
NC
N
C
VIDEO3
R
L
VDD
VSS
CO
M
T
V/DB
S
D
V
D/LD
V2 OUT
VIDE
O
2
V1 OU
T
VIDEO
1
L
AT
G
ND
DAT
C
LK
CO
M
V
IDEO
3
C
Y
C
Y
(CHASSIS)
(CHASSIS)
(CHASSIS)
(CHASSIS)
(CHASSIS)
+5V(BACK UP)
DB870:CND
/DB1070
(US,CND)
VIDEO3
*
(US,CND)
(DB1070:AEP,UK,E,CH)
(DB870:AEP,UK)
19P
14P
10P
CN751
Y SWITCH
C SWITCH
(DB870)
CONTROL S
I/O SWITCH
Q750,751
BUFFER
BUFFER
Q752,753
IN
MONITOR
CTRL S
CTRL S
TV/SAT
STATUS IN
CTRL S
DVD/LD
OUT
CTRL S
OUT
VIDEO 1
MONITOR
S-VIDEO
OUT
S-VIDEO
TV/SAT
IN
S-VIDEO
IN
DVD/LD
S-VIDEO
OUT
S-VIDEO
IN
VIDEO 1
L
R
L
R
L
R
L
R
L
R
L
R
TV/SAT
AUDIO IN
AUDIO IN
DVD/LD
AUDIO OUT
AUDIO IN
VIDEO 2
AUDIO OUT
AUDIO IN
VIDEO 1
VIDEO
SELECT
(US,CND)
(DB870)
(Page 31)
(Page 43)
(Page 37)
(Page 43)
STR-DB870/DB1070
34
34
6-19. PRINTED WIRING BOARD – MAIN Board –
•
See page 22 for Circuit Boards Location.
(Page 29)
CN805
CN809
CP801
JW184
JW352
JW351
JW237
JW195
JW312
JW345
JWH113
JW328
C809
JW335
JW303
IC602
C602
R602
C667
JW344
IC401
R653
R652
R603
R604
C652
C619
C718
C601
C651
JW320
JW319
JW329
JW334
JW183
JW317
IC702
C702
R702
JW305
JW326
IC601
JW322
JW321
R703
R704
C821
C704
JW325
C701
R824
JW316
JW314
R841
JW315
JW346
IC402
C452
R452
C567
JW348
IC501
R403
R402
R453
R404
C402
C420
C618
C451
C401
JW324
JW323
JW340
JW250
C664
JW337
JW261
JW194
R855
JW109
JW110
JW111
JW112
C126
JW127
JW167
JW276
JW277
JW288
JW169
JW178
IC805
JWH114
JW369
JW339
JW374
R407
Q811
R114
R864
R809
JW353
CP502
C810
R835
R808
R811
R810
Q806
JW294
JW295
JW378
JW373
JW307
Q503
Q502
JW296
L451
JWH115
JW144
JW308
R563
JW332
Q452
Q453
C464
R562
R567
R458
JW338
JW390
R413
R473
R573
R523
JW387
L551
C561
C562
C461
R463
JW381
Q553
Q552
JW281
JW384
IC403
R608
R461
R460
JW333
R459
R409
R617
C454
C404
C455
C405
C456
C410
C406
C460
C408
C458
C409
C459
C417
JW400
JWH117
JW310
IC603
R410
R667
JWH116
JW299
R609
IC502
R659
JWH119
R611
R610
C604
C654
C605
C655
C606
C660
C656
C610
C658
C608
C659
C609
C617
JW298
JW341
R513
C502
R502
R651
C467
JW176
R510
D810
JWH118
C462
L401
Q402
Q403
R613
R417
C411
R512
R558
R423
C412
JW282
L601
Q602
Q603
R663
R661
C611
JW284
JW302
R623
C520
C612
JW286
JW268
R467
Q652
Q653
R660
C661
JW283
R673
C662
JW304
C819
C668
R662
JW139
C414
R612
JW297
JW206
C407
R607
R412
JW300
C514
JW371
JW309
L501
C511
JW331
JWH111
Q823
Q826
C512
Q825
IC804
JW173
JW238
JW253
JW249
JW289
C568
JW701
IC503
R507
JW141
R854
JW342
R856
JW270
JW271
JW272
D802
JW265
JW274
JW248
C816
JW275
JW252
R551
D803
JW258
JW273
JW267
CN808
JW179
R860
R817
R852
R853
JW180
R813
R859
D801
JW293
R560
R511
JW311
R509
R559
R561
C614
JW397
JW292
JW291
JW394
R517
D816
JW136
JW262
JW192
JW218
JW260
JW365
JW256
JWH120
JW255
JW246
JW191
C564
JW349
C504
R553
R552
R503
JW318
R504
C552
C519
C419
C501
C551
R658
C620
JW279
C607
C507
C657
R508
JW160
CN801
RY806
R833
(DB1070)
R826
JW211
Q810
JW801
R846
Q701
Q809
Q815
JW705
D815
C803
JW269
JW285
JW123
JW119
IC801
CN804
JW134
JW231
JW131
Q808
R336
JWH105
R134
R184
D814
R133
R183
C134
C175
D301
R132
R130
JW130
C174
C124
C123
C173
R182
R180
R181
C125
JW187
JW142
R113
JW120
JW263
JW135
JW129
R122
JW158
R337
C164
JW209
C115
C165
R123
R173
R121
R120
R119
R171
R172
R170
C138
C163
C114
C113
C112
C518
R169
R167
R117
R118 C111
C110
C158
R166
R116
C159
JW235
R831
Q807
C818
JW240
JW239
JW241
R315
Q301
R812
R822
RY807
C703
C162
R830
R849
JW287
JWH107
JW215
JW245
JW212
JW210
JW208
JW207
JW205
JW204
C127
JW197
JW214
JW213
JW243
JW233
JW202
JW217
JW234
JWH106
JW259
JW186
R168
JW216
JW175
R135
C133
JW229
JW226
JW222
JW221
JW
138
CP802
JW185
Q451
JW232
JW230
JW228
JW227
JW247
JW220
JW219
JW201
JW190
JW199
R152
JW198
JW143
JW165
JW159
JW154
Q812
JW161
JWH108
JW125
JW124
C554
JWH101
JW126
JW121
JW189
JW114
R848
JW115
R847
D811
D809
JW177
D813
JW155
JW122
Q501
RY805
JW145
C505
R401
JWH110
R820
JW137
C802
C801
C804
JW128
R825
C161
JW140
C132
JW200
JW203
JW224
JW223
R104
C815
C814
Q824
R818
C109
R126
C105
C555
C506
JWH109
C560
JW244
C457
JW251
R462
C556
C510
C558
JW336
C508
R101
C104
C509
C559
C517
JW372
JW280
C136
C137
R176
R125
R175
R115
R165
R157
R155
R156
R153
R154
R151
R105
C106
C107
JW225
R106
C103
C101
R102
C102
JW236
R103
C177
C160
C108
JW802
R451
R701
R501
R601
Q601
Q651
JW132
JW133
R129
R179
R128
R178
R127
R177
JW163
JW170
JW172
JW242
JW174
JW264
C130
JW150
JW149
JW171
CN101
IC802
JW166
R814
CN803
CN802
JW117
IC103
RY301
GP801
IC104
JW164
JW146
JW148
JW153
JW118
JWH102
JWH104
JWH103
IC101
C131
C129
R832
C128
JW188
JW152
JW162
CN807
RY803
RY801
R816
CN806
JW327
JW157
C557
JW156
JW113
JW301
JW168
JW151
JW147
IC105
IC102
JW278
JW306
JWH112
JW375
JW376
JW391
JW389
JW388
JW386
JW385
JW383
JW382
JW380
JW379
JW377
JW356
JW358
JW193
JW350
JW370
JW367
JW313
Q813
JW366
R815
JW364
JW357
JW266
JW361
JW330
JW343
JW347
R408
JW355
IC701
JW393
CP803
JW290
JW707
JW116
JW399
JW398
JW395
CP501
C811
JW354
JW368
JW702
JW706
L651
Q551
Q401
C813
JW360
JW359
JW362
R850
JW363
R664
R614
R414
R464
R564
R514
C817
R851
JW182
JW181
JW196
JW257
C812
JW254
R131
CN500
CN552
CN550
CN450
CN400
CN600
CN503
CN650
(DB1070)
(DB1070)
1
7
14
8
1
7
14
8
R411
1
2
R
L
FRONT
R
L
FRONT
R
L
PHONO IN
R
L
CD/SACD IN
R
L
OUT
R
L
OUT
R
L
2ND ROOM OUT
R
L
IN
R
L
IN
R
L
SURROUND
MULTI CH IN 2
MULTI CH IN 1
MULTI CH IN
CENTER
SUB
WOOFER
R
L
SURROUND
CENTER
SURROUND
BACK
SUB
WOOFER
(DB870)
(DB1070)
J305
J304
J307
J301
J303
(DB1070)
AEP, UK,
E, CH
AEP, UK,
E, CH
AEP, UK,
E, CH
AEP, UK,
E, CH
US,
CND
US,
CND
MD/DAT
MD/TAPE
(DB870)
(DB1070)
J302
TAPE
–
–
+
+
–
–
+
+
R
L
SURROUND
CENTER
SURROUND
BACK
SPEAKERS
IMPEDANCE USE 4-16
Ω
TM501
MAIN BOARD
E
E
E
E
E
E
E
E
1
21
2
20
(DB1070)
(DB1070)
(DB870)
D
DIGITAL
BOARD
CN1103
L
VIDEO AU
BOARD
CN201
G
DIGITAL
BOARD
CN1109
F
DIGITAL
BOARD
CN1102
RY805
4
1
5
8
15
28
14
1
–2
–1
28
1
15
14
1
4
5
8
E
E
E
–2
–1
–2
–1
1
3
1
3
(DB1070)
(DB1070)
(DB1070)
E
2
1
1
21
2
20
E
E
E
CN502
1
2
1
2
–1
–2
1
4
E
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
8
5
20
11
1
10
1
4
8
5
20
11
1
10
1
4
8
5
20
11
1
10
1
4
8
5
20
11
1
10
1
4
(DB1070)
(DB1070)
(DB1070)
(DB870)
–2
–1
11
1
1
6
E
E
E
1
7
N
BIAS BOARD
CN501
M
BIAS BOARD
CN551
E
1
7
1
7
1
7
1
7
14
15
2
1
14
15
2
1
14
15
2
1
O
BIAS BOARD
CN451
P
BIAS BOARD
CN401
Q
BIAS BOARD
CN601
S
H. P BOARD
CN749
(DB1070)
1
7
(DB1070)
(DB1070)
(DB1070)
(DB870)
I
SP BOARD
CN502
R
BIAS
BOARD
CN651
T
SP BOARD
CN403
V
DC2 BOARD
CN902
U
DC1 BOARD
CN910
W
BIAS BOARD
CN810
1
1
4
7
1
5
1-618-114-
11
(11)
–1
–2
A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
8
9
10
11
12
13
(Page 29)
(Page 29)
(Page 38)
(Page 38)
(Page 38)
(Page 38)
(Page 38)
(Page 38)
(Page 38)
• Semiconductor
Location
Ref. No.
Location
D301
C-10
D801
F-11
D802
E-3
D803
E-3
D809
D-11
D810
F-11
D811
D-11
D813
D-4
D814
E-9
D815
G-12
D816
F-9
IC101
C-4
IC102
D-7
IC103
C-10
IC104
C-6
IC105
D-9
IC401
G-5
IC402
F-5
IC403
I-7
IC501
G-4
IC502
F-4
IC503
I-4
IC601
G-7
IC602
F-7
IC603
I-11
IC701
G-8
IC702
F-8
IC801
E-13
IC802
E-12
IC804
G-3
IC805
H-3
Q301
C-10
Q401
D-3
Q402
J-8
Q403
J-9
Q451
C-2
Q452
J-6
Q453
J-7
Q501
C-2
Q502
J-3
Q503
J-4
Q551
D-3
Q552
J-4
Q553
J-5
Q601
B-2
Q602
J-10
Q603
J-11
Q651
D-2
Q652
J-12
Q653
J-12
Q701
C-2
Q806
H-12
Q807
C-11
Q808
F-11
Q809
D-11
Q810
H-2
Q811
H-3
Q812
H-3
Q813
C-2
Q815
D-5
Q823
E-8
Q824
F-12
Q825
F-9
Q826
F-11
(Page 44)
2
(Page 42)
(Page 42)
(Page 44)
(Page 32)
(Page 42)
STR-DB870/DB1070
35
35
R452
CN805
C703
D816
D801
R852
D810
C667
R604
C619
C618
C419
JW701
R404
C420
C567
C467
R504
C519
C518
C501
R502
R503
C502
C551
R552
R553
C552
C812
C821
C451
R453
C452
C402
R403
C813
R402
C601
R602
R603
C602
R653
C652
R652
C651
C818
C819
R826
R
135
C131
C133
C132
R704
C704
C718
R703
C702
R702
C701
R451
R401
R701
R501
R601
R551
C138
JW802
R832
R831
D813
R651
CN807
R101
R102
R103
R104
R105
R106
C177
R151
R152
R153
R154
R155
R156
R157
C107
J307
J305
IC501
IC502
IC402
IC602
IC401
IC601
RY807
Q825
R859
Q826
R853
R860
R813
R817
Q808
R854
IC701
IC702
RY805
Q815
R830
JW801
R833
IC101
Q701
J304
C401
Q651
Q601
Q551
Q501
Q401
Q451
1k
11P
22
50V
1SS133T-72
1SS133T-72
4.7k
1SS133T-72
47
16V
1k
100p
47
16V
47
16V
1k
100p
47
16V
47
16V
1k
100p
47
16V
22 50V
1k
100k
220p
22
50V
1k
1
00k
220p
0.1
0.01
22
50V
100k
220p
220p
100k
0.1
1k
22
50V
1k
100k
220p
100k
220p
1k
22 50V
22
25V
22
25V
1M
1k
2200p
100p
2200p
1k
100p
47
16V
100k
220p
1k
22
50V
6.8k
6.8k
6.8k
6.8k
6.8k
6.8k
0.01
4.7k
10k
1SS133T-72
6.8k
21P
1k
1k
1k
1k
1k
1k
2200p
1k
1k
1k
1k
1k
1k
1k
2200p
1P
6P
TC94A07P
M5218AP-22
M5218AP-22
M5218AP-22
TC94A07P
TC94A07P
2SC2785TP-
2.2k
2SC2785TP-
10k
10k
4.7k
10k
2SC2785TP-
10
TC94A07P
M5218AP-22
2SC2785TP-
10
1M
TC9274-014
2SC3623A
6P
22 50V
2SC3623A
2SC3623A
2SC3623A
2SC3623A
2SC3623A
2SC3623A
1A
2A
1B
2B
3B
4B
5B
6B
7B
8B
9B
10B
11B
13B
14B
15B
16B
17B
18B
12B
D1
D2
D3
D4
D5
D6
D7
D6
D5
D4
D3
D2
D1
E1
E2
E3
E4
E5
E6
E6
E7
E8
E9
E10
E11
E12
E13
B1
B3
B4
B5
B2
E1
E2
E3
E4
E5
E6
E7
E8
E9
E10
E11
E12
E13
F1
F2
G2
G1
D7
I3
J1
J2
J4
J1
J2
J4
N1
N1
N1
N1
N2
N2
N2
N2
N3
N3
N3
N3
I1
I2
J6
J5
J3
B2
B1
J6
J5
J3
VDD
VEE
6.1C
5.1C
D/AC
2NDL
2NDR
6.1SB
D/ASB
SBOUT
COUT
6.1SL
5.1SL
D/ASL
SLOUT
6.1SR
D/ASR
5.1SR
SROUT
6.1SW
5.1SW
D/ASW
SWOUT
2CHL
6.1L
5.1L
D/AL
LOUT
2CHR
6.1R
5.1R
D/AR
ROUT
VSS
6.0
VSS
TRIM
TRIM
TRIM
TRIM
TRIM
TRIM
OUT
VRGND
IN
CS1
GND
OUT
VRGND
IN
CS2
DATA
VDD
NC
NC
NC
NC
SOURCE-L
SOURCE-R
DB9-W/DB8-NC
DB9-SB/DB8-W
C
SR
SL
FRONT-R
TUNER-R
TUNER-L
FRONT-L
CLK
CLK
DATA
LAT
LAT
SL
SW
SR
R
L
SB
C
GND
VSS
TRIM
TRIM
TRIM
TRIM
TRIM
TRIM
OUT
VRGND
IN
CS1
GND
OUT
VRGND
IN
CS2
DATA
VDD
CLK
LAT
VSS
TRIM
TRIM
TRIM
TRIM
TRIM
TRIM
OUT
VRGND
IN
CS1
GND
OUT
VRGND
IN
CS2
DATA
VDD
CLK
LAT
VSS
TRIM
TRIM
TRIM
TRIM
TRIM
TRIM
OUT
VRGND
IN
CS1
GND
OUT
VRGND
IN
CS2
DATA
VDD
CLK
LAT
FSP,RY-
PRE,RY-
(CHASSIS)
(CHASSIS)
RY+
(DB870)
ELECTRICAL
VOLUME
VCC
VSS
BUFFER
BUFFER
VSS
VCC
BUFFER
VCC
VSS
ELECTRICAL
VOLUME
ELECTRICAL
VOLUME
-1
-2
RELAY DRIVE
RELAY DRIVE
RELAY DRIVE
ELECTRICAL
VOLUME
VSS
VCC
BUFFER
(DB1070)
-1
-2
RELAY
DRIVE
(DB1070)
(DB870)
(DB870)
(DB1070)
AUDIO SELECT
MUTING
MUTING
MUTING
MUTING
MUTING
MUTING
MUTING
(DB1070)
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
L
R
L
R
FRONT
SURROUND
CENTER
SUB WOOFER
MULTI CH IN
MULTI CH IN 2
L
R
L
R
FRONT
SURROUND
CENTER
SURROUND BACK
SUB WOOFER
MULTI CH IN 1
(DB1070)
(DB1070)
(DB870)
6-20. SCHEMATIC DIAGRAM – MAIN Board (1/3) –
•
See page 46 for IC Block Diagrams.
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
0
sont
critiques pour la sécurité.
Ne les remplacer que
par une pièce portant le numéro spécifié.
(Page 26)
(Page 37)
(Page 36)
(Page 43)
STR-DB870/DB1070
36
36
CN801
R825
CN803
CN809
CN802
CN804
C802
IC802
C804
C801
C815
C803
IC801
GP801
R822
D809
R820
R847
R848
R812
R816
R814
R818
D811
CN650
C668
C664
L651
C614
R617
C620
L601
R835
C810
C514
C520
R517
L501
CN500
C511
R512
R567
R513
C809
C611
R612
R613
C612
C661
R662
C662
R663
CN600
CN400
C407
C414
L401
C457
C464
R467
L451
C461
L551
R563
C562
C561
R562
CN550
R462
C462
C411
R412
C412
CN450
R864
Q811
R507
C504
C554
R558
R508
C506
C510
C560
C556
C558
C517 C559
C509
C508
C505
R509
C555
R559
C456
C460
C410
C406
R407
C404
C454
R408
R458
C458
C417
C459
C409
C408
C455
R459
R409
C405
JW702
C610
C656
C660
C606
C608
C617
C609
C658
C659
JW707
JW706
C605
R609
C655
C654
C604
R608
R658
IC503
IC603
C512
R809
R810
R811
R514
R523
R573
C568
C564
Q553
Q552
Q502
R564
R614
R464
R414
R664
Q603
Q602
Q403
Q402
Q453
Q452
R667
R673
R413
R417
R463
R423
R473
R808
Q806
RY806
R849
Q823
D814
RY801
Q807
Q809
RY803
C507
C557
CN553
CN502
CN552
R824
C607
C657
TM501
Q824
R659
JW705
Q812
Q503
R851
D815
C814
R623
Q652
Q653
R607
IC403
C811
R561
R511
R510
R560
R410
R461
R460
R411
R611
R610
R661
R660
5P
470
1W
4P
6P
4P
7P
470
25V
25V
M5F7915L
0.47
470
25V
25V
100
16V
16V
0.47
M5F7815L
GND PLEATE
10
1SS133T-72
10
4.7k
10k
4.7k
10k
4.7k
10k
1SS133T-72
7P
0.068
0.068
0.068
10
0.068
100k
22
100V
0.068
0.068
10
7P
22p
500V
100
10
100
22
100V
22p
500V
100
100
22p
500V
22p
500V
100
22p
500V
100
7P
7P
0.068
0.068
0.068
0.068
10
22p
500V
100
22p
500V
22p
500V
100
7P
100
22p
500V
22p
500V
100
22p
500V
7P
47k
2SA988TP-P
22k
22 50V
22
50V
1k
1k
33p
500V
100p
100p
33p
500V
4p
500V
100p
50V
220
10V
10V
220
10V
10V
4p
500V
220p
68k
220p
68k
33p
500V
100p
100p
33p
500V
22k
22 50V
22
50V
1k
1k
4p
500V
100p
50V
220
10V
10V
220
10V
10V
4p
500V
220p
68k
68k
220p
100p
33p
500V
100p
33p
500V
4p
500V
100p
50V
220
10V
10V
4p
500V
220
10V
10V
220p
68k
220p
22 50V
22
50V
1k
1k
22p
500V
1
1
0.22X2
5W
10
10
0.068
0.068
0.22X2
5W
0.22X2
5W
0.22X2
5W
0.22X2
5W
0.22X2
5W
10
10
100
10
100
10
10
22k
2SC1815YGR
10
2SC2785TP-
1SS133T-72
2SC2785TP-
2SC2785TP-
100p
100p
2P
1P
1P
470
1W
100p
100p
2SC1815YGR
68k
BA1F4M-TP
4.7k
HZS6B2LTA
100
16V
16V
10
2SD2560
2SB1647
22k
22
100V
68k
68k
2.7k
2.7k
2.7k
68k
2.7k
68k
68k
2.7k
68k
2.7k
1A
2A
1C
2C
3C
4C
5C
6C
7C
8C
K1
K2
K3
K5
K4
L1
L2
L3
L4
L5
L6
M
1
M
2
M
3
M
4
M
5
M
6
H2
H3
H4
H5
H1
J2
J1
J3
J4
J6
J5
K1
K2
K3
K4
K5
K6
M
4
M
5
M
6
M1
M
2
M
3
L6
L5
L4
L3
L2
L1
K6
*
*
*
*
*
*
*
*
*
*
*
+VEOUT
-VEOUT
NF
INPUT
GND
INPUT
NF
-VEOUT
+VEOUT
VCC
VCC
VEE
RY GND
GND
-24V
24V(RY)
FL GND
+B
-B
+VEOUT
-VEOUT
NF
INPUT
GND
INPUT
NF
-VEOUT
+VEOUT
VCC
VCC
VEE
+VEOUT
-VEOUT
NF
INPUT
GND
INPUT
NF
-VEOUT
+VEOUT
VCC
VCC
VEE
L
GND
GND
R
HP-CONT
+OUT
+OUT
-OUT
-OUT
+VE
SPOUT
-VE
+OUT
-OUT
-OUT
+VE
SPOUT
-VE
+OUT
+OUT
-OUT
-OUT
+VE
SPOUT
-VE
+OUT
+OUT
-OUT
-OUT
+VE
SPOUT
-VE
+OUT
+OUT
-OUT
-OUT
+VE
SPOUT
-VE
+OUT
+OUT
-OUT
-OUT
+VE
SPOUT
-VE
+OUT
GND
SENSOUT
PROTECTOUT
-B
GND
+15V
-15V
(CHASSIS)
(CHASSIS)
(CHASSIS)
(CHASSIS)
*
(US,CND)
R809
330 2W
150 2W
470 2W
(AEP,UK)
(E,CH)
BOOSTER
BOOSTER
BOOSTER
BOOSTER
BOOSTER
BOOSTER
BOOSTER
BOOSTER
BOOSTER
BOOSTER
BOOSTER
BOOSTER
OVER LOAD DETECT
-1
-2
RELAY DRIVE
RELAY DRIVE
-1
-2
RELAY DRIVE
-1
-2
H.P GND
H.P R
H.P L
R
SURROUND
L
SURROUND BACK
CENTER
(DB1070)
(DB1070)
SPEAKERS
IMPEDANCE
USE 4-6
Ω
CT GND
B GND
+24V
+15V
REGULATOR
I
G
O
I
G
O
REGULATOR
-15V
*
Q402,452,502,552,602
MN2488
2SD2560
(DB1070)
(DB870)
*
(DB1070)
(DB870)
Q403,453,503,553,603
MP1620
2SB1647
(DB1070)
(DB1070)
(DB870)
(DB870)
POWER AMP
POWER AMP
POWER AMP
MUTING
DRIVE
MUTING
ON/OFF
REGULATOR
+5V
µ
PC2581V
µ
PC2581V
µ
PC2581V
6-21. SCHEMATIC DIAGRAM – MAIN Board (2/3) –
•
See page 46 for IC Block Diagrams.
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
0
sont
critiques pour la sécurité.
Ne les remplacer que
par une pièce portant le numéro spécifié.
(Page
35)
(Page 39)
(Page 39)
(Page 43)
(Page 43)
(Page 45)
(Page 45)
(Page 39)
(Page 37)
(Page 39)
(Page 39)
(Page 39)
(Page 39)
Click on the first or last page to see other STR-DB1070 / STR-DB870 service manuals if exist.