Sony sa wvs 300 service manual
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Extracted text from sony sa wvs 300 service manual (Ocr-read)
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2 SA-WVS200/WVS300 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, screw\ s, 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.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) SAFETY CHECK-OUT To Exposed Metal Par ts on Set 0.15 µF 1.5 kΩ AC V oltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. 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. 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 D ANS LES SUPPÉMENTS PUBLIÉS PAR SONY. TABLE OF CONTENTS 1. DIAGRAMS 1-1. Printed Wiring Boards– Pri Amp Section – ..................... 3 1-2. Schematic Diagram – Pri Amp Section – ........................ 4 1-3. Printed Wiring Boards – Power Amp Section– ............... 5 1-4. Schematic Diagram – Power Amp Section – .................. 6 2. EXPLODED VIEWS 2-1. Main Section .................................................................... 7 3. ELECTRICAL PARTS LIST .................................. 8
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SA-WVS200/WVS300 3 3 SA-WVS200/WVS300 SECTION 1 DIAGRAMS 1-1. PRINTED WIRING BOARD – PRI AMP SECTION – For printed wiring boards. Note: - X : parts extracted from the component side. - : Pattern from the side which enables seeing. Ref. No. Location D401 C-7 D402 C-6 D403 D-6 D404 D-6 D501 B-4 D502 B-4 D814 B-7 D815 B-7 IC501 C-2 IC502 D-6 IC503 C-3 IC504 C-5 IC505 B-5 IC506 B-4 Q401 D-7 Q402 D-7 Q403 B-6 Q404 B-6 Q405 B-6 Q501 C-4 Q803 C-7 Q804 C-7 - Semiconductor Location PRI AMP BOARD 11 (11) 1-863-035- POWER SAVE AUTO t OFF NORMAL t REVERSE PHASE LEVEL BASS BOOST LINE IN BC504 BC506 R806 R807 R410 C520 C513 C512 C508 C503 C515 C514 C504C509 C505C506 R401 R407 R406 R404 R403 R409 R523 R522 R521 R531 R503 R515 R506 R528 R405 R518 R524 R408 R514 R519 R520 R527 R525 R529 R530 R526 R504 R516 R517 R507 R508 R505 R512 R501 C501 R502 R511 R509 R402D814 D815 Q403 Q405 Q404 Q804 Q803 JW515 C820 C819 C818 C816 1 7 C817 C821 R513 C402 D402 1 4 8 5 D502 D501 D403 E B E B B E BE E B E B B E JW513 JW512 JW504 JW504 JW501 JW504 JW505 JW502 JW507 JW516 JW518 JW508 JW511 JW510 JW509 JW517 D401 D404 Q402 Q401 JW519 (CHASSIS) S401 S501 C516 C517 C519 J501 Q501 B E VR501 VR502 C510 C511 C502 1 5 1 41 4 IC502 1 4 8 5 IC504 1 4 8 5 IC505 1 4 8 5 IC506 1 4 8 5 IC503 1 4 8 5 IC501 A POWER AMP BOARD (Page 5) B AUTO POWER BOARD (Page 5) 2 3 4 5 6 7 8 A 1 B C D E