Read Sony STR-DA777ES / STR-V777ES / VUCD-777A Service Manual online
3
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
PUBLISHED BY SONY.
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
After correcting the original service problem, perform the
following safety checks 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.
following safety checks 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
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.
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
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2.
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
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 passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. 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 passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15
µ
F
1.5 k
Ω
AC
Voltmeter
(0.75 V)
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE
0
SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
TABLE OF CONTENTS
1.
GENERAL
······································································ 4
2.
ADJUSTMENT
······························································ 6
3.
DIAGRAMS
···································································· 7
3-1.
Circuit Board Location ······················································· 7
3-2.
Block Diagram Main Section ············································· 8
3-3.
Block Diagram Digital Section ·········································· 9
3-4.
Block Diagram Control Section ······································· 10
3-5.
Block Diagram Power Section ········································· 11
3-6.
Printed Wiring Board Audio Section ································ 12
3-7.
Schematic Diagram Audio Section ··································· 13
3-8.
Printed Wiring Board Video Section ································ 14
3-9.
Schematic Diagram Video Section ··································· 15
3-10. Printed Wiring Board Volume Section(SIDE A) ·············· 16
3-11. Printed Wiring Board Volume Section(SIDE B) ············· 17
3-12. Schematic DiagramVolume Section(1/2) ························· 18
3-13. Schematic DiagramVolume Section(2/2) ························· 19
3-14. Printed Wiring Board Digital Section(SIDE A) ··············· 20
3-15. Printed Wiring Board Digital Section(SIDE B) ··············· 21
3-16. Schematic Diagram Digital Section(1/7) ························· 22
3-17. Schematic Diagram Digital Section(2/7) ························· 23
3-18. Schematic Diagram Digital Section(3/7) ························· 24
3-19. Schematic Diagram Digital Section(4/7) ························· 25
3-20. Schematic Diagram Digital Section(5/7) ························· 26
3-21. Schematic Diagram Digital Section(6/7) ························· 27
3-22. Schematic Diagram Digital Section(7/7) ························· 28
3-23. Printed Wiring Board AMP Section ································· 29
3-24. Schematic Diagram AMP Section(1/2) ···························· 30
3-25. Schematic Diagram AMP Section(2/2) ···························· 31
3-26. Printed Wiring Board Display Section(SIDE A) ·············· 32
3-27. Printed Wiring Board Display Section(SIDE B) ·············· 33
3-28. Schematic Diagram Display Section(1/2) ························ 34
3-29. Schematic Diagram Display Section(2/2) ························ 35
3-30. Printed Wiring Board Switch Section ······························ 36
3-31. Printed Wiring Board Control Jack Section ····················· 37
3-32. Schematic Diagram Control Jack Section ························ 37
3-33. Printed Wiring Board Speaker Terminal Section ············· 38
3-34. Schematic Diagram Speaker Terminal Section ················ 39
3-35. Printed Wiring Board Power Supply Section ··················· 40
3-36. Printed Wiring Board AC Power Supply Section ············· 41
3-37. Schematic Diagram Power Supply Section ······················ 42
3-38. IC Block Diagrams ··························································· 43
3-39. IC Pin Function Description ············································· 47
3-11. Printed Wiring Board Volume Section(SIDE B) ············· 17
3-12. Schematic DiagramVolume Section(1/2) ························· 18
3-13. Schematic DiagramVolume Section(2/2) ························· 19
3-14. Printed Wiring Board Digital Section(SIDE A) ··············· 20
3-15. Printed Wiring Board Digital Section(SIDE B) ··············· 21
3-16. Schematic Diagram Digital Section(1/7) ························· 22
3-17. Schematic Diagram Digital Section(2/7) ························· 23
3-18. Schematic Diagram Digital Section(3/7) ························· 24
3-19. Schematic Diagram Digital Section(4/7) ························· 25
3-20. Schematic Diagram Digital Section(5/7) ························· 26
3-21. Schematic Diagram Digital Section(6/7) ························· 27
3-22. Schematic Diagram Digital Section(7/7) ························· 28
3-23. Printed Wiring Board AMP Section ································· 29
3-24. Schematic Diagram AMP Section(1/2) ···························· 30
3-25. Schematic Diagram AMP Section(2/2) ···························· 31
3-26. Printed Wiring Board Display Section(SIDE A) ·············· 32
3-27. Printed Wiring Board Display Section(SIDE B) ·············· 33
3-28. Schematic Diagram Display Section(1/2) ························ 34
3-29. Schematic Diagram Display Section(2/2) ························ 35
3-30. Printed Wiring Board Switch Section ······························ 36
3-31. Printed Wiring Board Control Jack Section ····················· 37
3-32. Schematic Diagram Control Jack Section ························ 37
3-33. Printed Wiring Board Speaker Terminal Section ············· 38
3-34. Schematic Diagram Speaker Terminal Section ················ 39
3-35. Printed Wiring Board Power Supply Section ··················· 40
3-36. Printed Wiring Board AC Power Supply Section ············· 41
3-37. Schematic Diagram Power Supply Section ······················ 42
3-38. IC Block Diagrams ··························································· 43
3-39. IC Pin Function Description ············································· 47
4.
EXPLODED VIEWS
4-1.
Case Section ····································································· 52
4-2.
Chassis Section ································································· 53
4-3.
Front Panel Section ·························································· 54
4-4.
Back Panel Section ··························································· 56
5.
ELECTRICAL PARTS LIST
··································· 57
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