Sony STR-DE835 Safety Check-Out, Leakage, Table Of Contents, Diagrams, Exploded Views, 0.15∝F

SAFETY CHECK-OUT

(US model only)

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.

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 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 0.75 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)

To Exposed Metal

Parts on Set

		AC
0.15∝F	1.5kΩ	voltmeter
		(0.75V)

Earth Ground

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

TABLE OF CONTENTS

1.GENERAL ·························

2.TEST MODE ························

3.DIAGRAMS

3-1.	Block Diagram	Main Section ·················
3-2.	Block Diagram	Power Section ················
3-3.	Circuit Board Location ····················
3-4.	Schematic Diagram		Digital Section(1/3) ············
3-5.	Schematic Diagram		Digital Section(2/3) ············
3-6.	Schematic Diagram		Digital Section(3/3) ············
3-7.	Printed Wiring Board		Digital Section(1/2) ···········
3-8.	Printed Wiring Board		Digital Section(2/2) ···········
3-9.	Printed Wiring Board		Display Section ·············
3-10.	Schematic Diagram		Display Section ··············
3-11.	Printed Wiring Board		Surround Section ············
3-12.	Schematic Diagram		Surround Section ·············
3-13.	Printed Wiring Board		Rear AMP Section ············
3-14.	Schematic Diagram		Rear AMP Section ············
3-15.	Printed Wiring Board		Power Section ·············
3-16.	Schematic Diagram		Power Section ··············
3-17.	Printed Wiring Board		Video Section ··············
3-18.	Schematic Diagram		Video Section ··············
3-19.	Printed Wiring Board		Main Section ··············
3-20.	Schematic Diagram		Main Section(1/2) ············
3-21.	Schematic Diagram		Main Section(2/2) ············
3-22.	IC Pin Function ·······················
3-23.	IC Block Diagrams ······················

4. EXPLODED VIEWS

4-1. Front Panel Section ·····················

4-2. Chassis Section ·······················

5. ELECTRICAL PARTS LIST ················

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 À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFÉS 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 PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

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