STR-DA333ES, STR-DA555ES - Sony Audio Service Manual (repair manual)

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US Model

Canadian Model

MICROFILM

Photo: STR-DA555ES

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– BACK PANEL –

MODEL

PARTS No.

DA555ES:US model

4-219-066-0

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DA555ES:Canadian model

4-219-066-1

π

DA333ES:US model

4-219-066-2

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DA333ES:Canadian model

4-219-066-3

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PART NO.

    After correcting the original service problem, perform the fol-
lowing 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.

    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 microampers). Leak-
age 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.

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 2V AC range are suitable. (See Fig. A)

To Exposed Metal 

Parts on Set

0.15 

µ

F

1.5 k

Ω

AC
Voltmeter
(0.75 V)

Earth Ground

Fig. A.  Using an AC voltmeter to check AC leakage.

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9

10

5-1.

Block Diagram
• Main Section ·································································· 11
• Tuner Section ································································· 13
• Power Section ································································ 15

5-2.

Circuit Boards Location ··················································· 17

5-3.

Schematic Diagram – Digital  (1/3) Section – ················· 19

5-4.

Schematic Diagram – Digital  (2/3) Section – ················· 21

5-5.

Schematic Diagram – Digital  (3/3) Section – ················· 23

5-6.

Printed Wiring Board – Digital Section – ························ 25

5-7.

Printed Wiring Board – Main Section – ··························· 27

5-8.

Schematic Diagram – Main Section (1/3) – ····················· 29

5-9.

Schematic Diagram – Main Section (2/3) – ····················· 31

5-10. Schematic Diagram – Main Section (3/3) – ····················· 33
5-11. Schematic Diagram – AMP Section – ······························ 35
5-12. Printed Wiring Board – AMP Section – ··························· 37
5-13. Schematic Diagram – Video Section – ····························· 39
5-14. Printed Wiring Board – Video Section – ·························· 41
5-15. Schematic Diagram – Display Section – ·························· 43
5-16. Printed Wiring Board – Display Section – ······················· 45
5-17. Schematic Diagram – Speaker Section – ························· 47
5-18. Printed Wiring Board – Speaker Section – ······················· 49
5-19. Printed Wiring Board – Audio Section – ·························· 51
5-20. Schematic Diagram – Audio  Section – ···························· 52
5-21. Schematic Diagram – Input Section – ······························ 53
5-22.  Printed Wiring Board – Input Section – ··························· 54
5-23.  Schematic Diagram – Power Section – ···························· 55
5-24. Printed Wiring Board – Power Section – ························· 57
5-25. IC Block Diagrams ··························································· 59
5-26. IC Pin Function Description ············································· 63

6-1.

Front Panel Section ·························································· 71

6-2.

Chassis Section ································································· 72

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