Table Of Contents - Sony SA-W70ES Service Overview

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SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing saf ety 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 0.5mA (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" indication is 0.75V,
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)
To Exposed Metal
Parts on set
TE
L 13942296513
0.15 µ F
Fig. A. Using an AC voltmeter ro check AC leakage.
AFETY-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.
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AC
1.5k Ω
voltmeter
(0.75V)
Earth Ground
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TABLE OF CONTENTS

Specifications ............................................................................ 1
1. GENERAL
Location of Controls ........................................................... 3
2. DIAGRAMS
2-1. Circuit Boards Location ............................................... 4
2-2. Printed Wiring Boards ................................................. 5
2-3. Schematic Diagram ...................................................... 9
3. EXPLODED VIEWS
3-1. Cabinet Section (SA-W70ES/W705) ........................... 13
3-2. Cabinet Section (SA-W505) ........................................ 14
3-3. AMP Section ................................................................ 15
4. ELECTRICAL PARTS LIST ........................................... 16
MODEL IDENTIFICATION
MODEL NO.
ACTIVE SUPER WOOFER
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SA-W505 (US, Canadian model)
SA-W505 (AEP, German, E model)
SA-W70ES (AEP, German, E model) : 220 - 230V AC, 50/60Hz 190W
SA-W705 (US, Canadian model)
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 COMPOSANTS QUE PAR DES PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
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SA-W70ES
SA-W505
SA-W705
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: 120V AC, 60Hz 130W
: 220 - 230V AC, 50/60Hz 130W
: 120V AC, 60Hz 190W
À LA SÉCURITÉ!
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