Sony STR-DA80ES Service Manual page 3

TABLE OF CONTENTS
1. GENERAL
................................................................... 4
2. DISASSEMBLY
.......................................................... 7
3. ELECTRICAL ADJUSTMENTS
4. DIAGRAMS
4-1. IC Pin Function Description ............................................ 10
4-2. Schematic Diagram – DISPLAY Section – .................... 24
4-3. Printed Wiring Boards – DISPLAY Section – ................ 29
4-4. Schematic Diagram – VIDEO Section – ......................... 33
4-5. Printed Wiring Boards – VIDEO Section – .................... 37
4-6. Schematic Diagram
– INPUT/TUNER/POWER Section – ............................. 41
4-7. Printed Wiring Boards
– INPUT/TUNER/POWER Section – ............................. 45
4-8. Schematic Diagram – DIGITAL Section – ...................... 50
4-9. Printed Wiring Boards – DIGITAL Section – ................ 55
4-10. Schematic Diagram – AMP/OUTPUT Section – ............ 59
4-11. Printed Wiring Boards – AMP/OUTPUT Section – ....... 63
5. EXPLODED VIEWS
6. ELECTRICAL PARTS LIST
MODEL IDENTIFICATION
– BACK PANEL –
STR-DA80ES US Model
STR-DA80ES Canadian Model : 373-4 π
STR-DA80ES Australian Model : 373-5 π
STR-DA80ES E, PX Model
TA-V88ES Chinese Model
TA-VA80ES AEP, UK, German,
EE, CIS Model
TA-VA80ES E, Malaysia,
Singapore Model : 374-3 π
......................... 9
................................................ 69
................................ 74
4-991-
: 373-3 π
: 373-6 π
: 374-4 π
: 374-0 π
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.
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 microampers.).
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.
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" indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
To Exposed Metal
Parts on Set
0.15 µ F
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE
WITH MARK ! 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE ! 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.
– 3 –
AC
1.5 k Ω
voltmeter
(0.75 V)
Earth Ground
À LA SÉCURITÉ!