Sony STR-DB1070 / STR-DB870 Service Manual ▷ View online
3
STR-DB870/DB1070
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15
µ
F
AC
voltmeter
(0.75 V)
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Parts on Set
Earth Ground
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2 V AC range are suitable. (See Fig. A)
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2 V AC range are suitable. (See Fig. A)
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE
0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
0
OR DOTTED
LINE WITH MARK
0
ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
4
STR-DB870/DB1070
1.
SERVICING NOTES
...............................................
5
2.
GENERAL
...................................................................
6
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
8
3-2. Case .................................................................................
9
3-3. S-VIDEO board, VIDEO Board, Tuner .........................
9
3-4. VIDEO AU Board ........................................................... 10
3-5. DIGITAL Board .............................................................. 10
3-6. MAIN Board ................................................................... 11
3-5. DIGITAL Board .............................................................. 10
3-6. MAIN Board ................................................................... 11
4.
TEST MODE
.............................................................. 12
5.
ELECTRICAL ADJUSTMENT
............................ 13
6.
DIAGRAMS
6-1. Block Diagram
– TUNER/VIDEO INPUT Section – .............................. 15
6-2. Block Diagram – AUDIO DSP Section – ...................... 16
6-3. Block Diagram – AUDIO CONTROL Section – .......... 17
6-4. Block Diagram – POWER AMP Section – ................... 18
6-5. Block Diagram
6-3. Block Diagram – AUDIO CONTROL Section – .......... 17
6-4. Block Diagram – POWER AMP Section – ................... 18
6-5. Block Diagram
– DISPLAY/KEY CONTROL Section – ........................ 19
6-6. Block Diagram – POWER SUPPLY Section – ............. 20
6-7. Note for Printed Wiring Boards
6-7. Note for Printed Wiring Boards
and Schematic Diagrams ................................................ 21
6-8. Schematic Diagram – DIGITAL Board (1/5) – ............. 23
6-9. Schematic Diagram – DIGITAL Board (2/5) – ............. 24
6-10. Schematic Diagram – DIGITAL Board (3/5) – ............. 25
6-11. Schematic Diagram – DIGITAL Board (4/5) – ............. 26
6-12. Schematic Diagram – DIGITAL Board (5/5) – ............. 27
6-13. Printed Wiring Board
6-9. Schematic Diagram – DIGITAL Board (2/5) – ............. 24
6-10. Schematic Diagram – DIGITAL Board (3/5) – ............. 25
6-11. Schematic Diagram – DIGITAL Board (4/5) – ............. 26
6-12. Schematic Diagram – DIGITAL Board (5/5) – ............. 27
6-13. Printed Wiring Board
– DIGITAL Board (Component Side) – ......................... 28
6-14. Printed Wiring Board
– DIGITAL Board (Conductor Side) – ........................... 29
6-15. Printed Wiring Board – VIDEO Board – ....................... 30
6-16. Schematic Diagram – VIDEO Board – ......................... 31
6-17. Printed Wiring Boards
6-16. Schematic Diagram – VIDEO Board – ......................... 31
6-17. Printed Wiring Boards
– S-VIDEO/VIDEO AU Boards – .................................. 32
6-18. Schematic Diagram
– S-VIDEO/VIDEO AU Boards – .................................. 33
6-19. Printed Wiring Board – MAIN Board – ........................ 34
6-20. Schematic Diagram – MAIN Board (1/3) – .................. 35
6-21. Schematic Diagram – MAIN Board (2/3) – .................. 36
6-22. Schematic Diagram – MAIN Board (3/3) – .................. 37
6-23. Printed Wiring Board – BIAS Board – .......................... 38
6-24. Schematic Diagram – BIAS Board – ............................. 39
6-25. Printed Wiring Boards – DISP/SW Boards – ................ 40
6-26. Schematic Diagram – DISP/SW Boards – .................... 41
6-27. Printed Wiring Boards
6-20. Schematic Diagram – MAIN Board (1/3) – .................. 35
6-21. Schematic Diagram – MAIN Board (2/3) – .................. 36
6-22. Schematic Diagram – MAIN Board (3/3) – .................. 37
6-23. Printed Wiring Board – BIAS Board – .......................... 38
6-24. Schematic Diagram – BIAS Board – ............................. 39
6-25. Printed Wiring Boards – DISP/SW Boards – ................ 40
6-26. Schematic Diagram – DISP/SW Boards – .................... 41
6-27. Printed Wiring Boards
– H.P/MUTING/POWER/SP/VIDEO 3 Boards – ......... 42
6-28. Schematic Diagram
– H.P/MUTING/POWER/SP/VIDEO 3 Boards – ......... 43
6-29. Printed Wiring Boards
– POWER SUPPLY Section – ........................................ 44
6-30. Schematic Diagram – POWER SUPPLY Section – ...... 45
6-31. IC Pin Function Description ........................................... 51
6-31. IC Pin Function Description ........................................... 51
Ver 1.2
7.
EXPLODED VIEWS
7-1. Case Section .................................................................... 63
7-2. Front Panel Section-1 ...................................................... 64
7-3. Front Panel Section-2 ...................................................... 65
7-4. Chassis Section-1 ............................................................ 66
7-5. Chassis Section-2 ............................................................ 67
7-2. Front Panel Section-1 ...................................................... 64
7-3. Front Panel Section-2 ...................................................... 65
7-4. Chassis Section-1 ............................................................ 66
7-5. Chassis Section-2 ............................................................ 67
8.
ELECTRICAL PARTS LIST
............................... 68
TABLE OF CONTENTS
5
STR-DB870/DB1070
SECTION 1
SERVICING NOTES
• MODEL IDENTIFICATION
– Rear Panel –
PART No.
Model
PART No.
DB1070 : US model
4-233-610-0
[]
DB1070 : Canadian model
4-233-610-1
[]
DB1070 : Malaysia and
Singapore models
4-233-610-2
[]
DB1070 : Chinese model
4-233-610-3
[]
DB1070 : AEP and UK models
4-233-610-5
[]
DB1070 : 120 V AC area and
240 V AC area in E models
4-233-610-7
[]
DB1070 : Taiwan model
4-233-610-8
[]
DB1070 : Korean model
4-233-610-9
[]
DB870 : Canadian model
4-233-630-1
[]
DB870 : AEP and UK models
4-233-630-2
[]
SERVICE POSITION
In checking the DIGITAL board, prepare jig (extension cable J-2501-208-A: 200 mm 21 core).
Connect jig (extension cable J-2501-208-A)
to the MAIN board (CN806, 807) and
DIGITAL board (CN1102, 1103).
to the MAIN board (CN806, 807) and
DIGITAL board (CN1102, 1103).
DIGITAL board
MAIN board
6
STR-DB870/DB1070
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
•
•
ws
wf
wd
wh
e;
es
wj
wk
ea
ed
wa
wg
1 2 3
qj
4
qd
567
0 qa qs
qf qg
qh
qk ql
w;
8 9
wl
ef
eg
el
r;
rf
rg
eh
ej
ek
ra
rd rs
2CH qg (30)
2ND ROOM (STR-DB1070 only)
2ND ROOM (STR-DB1070 only)
eg (27)
6.1CH DECODING 0 (31)
6.1CH DECODING indicator 7
6.1CH DECODING indicator 7
(31)
A.F.D. qf (30)
AUDIO SPLIT wa (25)
CINEMA STUDIO EX qa (28)
Cursor buttons (
AUDIO SPLIT wa (25)
CINEMA STUDIO EX qa (28)
Cursor buttons (
/
) wj (19,
33, 35, 36, 43, 45)
DIGITAL CONCERT HALL qs
(29)
DIMMER 4 (27)
DIMMER indicator rs (27)
Digital Cinema Sound indicator
DIMMER indicator rs (27)
Digital Cinema Sound indicator
5 (28)
Display qj (32)
DISPLAY 3 (27, 41)
DOOR OPEN wg
DISPLAY 3 (27, 41)
DOOR OPEN wg
ENTER wh (43)
EQ e; (36)
EQUALIZER ef (36)
FM/AM 6 (38, 39)
FM MODE r; (39)
FUNCTION wd (24, 25, 38, 39,
EQ e; (36)
EQUALIZER ef (36)
FM/AM 6 (38, 39)
FM MODE r; (39)
FUNCTION wd (24, 25, 38, 39,
40, 43)
INPUT MODE wf (26)
IR receptor 2
Jog dial wk (19, 33, 35, 36, 43,
IR receptor 2
Jog dial wk (19, 33, 35, 36, 43,
45)
LEVEL wl (35)
MASTER VOLUME w; (24, 26)
MEMORY el (38, 40)
MODE +/– qh (28, 37)
MULTI/2CH A. DIRECT qk (26,
MASTER VOLUME w; (24, 26)
MEMORY el (38, 40)
MODE +/– qh (28, 37)
MULTI/2CH A. DIRECT qk (26,
30)
MULTI CHANNEL DECODING
indicator qd
MUTING ws (26)
NAME ed (43)
NIGHT MODE ql (31)
ON SCREEN (STR-DB1070
NIGHT MODE ql (31)
ON SCREEN (STR-DB1070
only) rd (10)
PHONES jack rg (26)
PRESET TUNING +/– 9 (40)
PTY SELECT +/– (AEP and UK
PRESET TUNING +/– 9 (40)
PTY SELECT +/– (AEP and UK
models) eh (41)
RDS/PTY (AEP and UK models)
ek (41)
SET UP es (19, 45)
SHIFT 8 (40)
SLEEP (Except AEP and UK
SHIFT 8 (40)
SLEEP (Except AEP and UK
models) ek (44)
SPEAKERS switch rf (26)
STREAM INFO (STR-DB870
STREAM INFO (STR-DB870
only) eg (27)
SURR ea (33)
TEST TONE ej (24)
TUNING +/– eh (39)
VIDEO 3 INPUT jacks ra
?/1
TEST TONE ej (24)
TUNING +/– eh (39)
VIDEO 3 INPUT jacks ra
?/1
(power) 1 (18, 23, 24, 37,
38)
LOCATION OF CONTROLS
– Front Panel –