Sony sa ve 445 h service manual
This is the 14 pages manual for sony sa ve 445 h service manual.
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Extracted text from sony sa ve 445 h service manual (Ocr-read)
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2 SA-VE445H/WMS445/SS-MS445 TABLE OF CONTENTS 1. DIAGRAMS 1-1. Circuit Boards Location (SA-WMS445) ............................ 3 1-2. Printed Wiring Boards (SA-WMS445) ............................... 5 1-3. Schematic Diagram (SA-WMS445) ................................... 6 2. EXPLODED VIEWS 2-1. Front Panel Section (SA-WMS445) .................................... 7 2-2. Rear Panel Section (SA-WMS445) ..................................... 8 2-3. Front, Center, and Surround Speakers Section (SS-MS445) ........................................................................\ . 9 3. ELECTRICAL PARTS LIST ........................................ 10 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 PA RT NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ!! LES COMPOSANTS IDENTIFIÉS 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 PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY. To Exposed Metal Parts on Set 0.15µF 1.5k Ω AC voltmeter(0.75V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. SAFETY CHECK-OUT After correcting the original service problem, perform the following 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 T he 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 V OM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)
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3 SA-VE445H/WMS445/SS-MS445 1-1. CIRCUIT BOARDS LOCATION (SA-WMS445) SECTION 1 DIAGRAMS AU TO POWER board MAIN boar d POWER board LED board POWER SWITCH board CONTROL board