Sony sa ve 702 service manual
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Extracted text from sony sa ve 702 service manual (Ocr-read)
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2 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. After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, ÒmetallizedÓ 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 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 manufacturersÕ 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 ÒlimitÓ 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 Parts on Set 0.15 µF 1.5 k ½ AC Voltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. ATTENTION AU COMPOSANT AYANT RAPPORT Ë LA SƒCURITƒ! LES COMPOSANTS IDENTIFƒS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHƒMATIQUES ET LA LISTE DES PIéCES SONT CRITIQUES POUR LA SƒCURITƒ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIéSES SONY DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU DANS LES SUPPƒMENTS PUBLIƒS PAR SONY.
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SA-VE702/VE705/WMS7/SS-MS7 3 3 SECTION 1 GENERAL ¥ Location of Controls SA-WMS7 Ð Front view Ð Ð Rear view Ð SECTION 2 DIAGRAMS 2-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS Note on Printed Wiring Board: ¥X: parts extracted from the component side. ¥b: Pattern from the side which enables seeing. (The other layers' patterns are not indicated.) ¥Indication of transistor. B These are omitted. CE Q Note on Schematic Diagram: ¥ All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. ¥ All resistors are in W and 1/4 W or less unless otherwise specified. ¥2: nonflammable resistor. ¥C: panel designation. ¥U: B+ Line. ¥V: BÐ Line. ¥ Voltages are dc with respect to ground under no-signal conditions. no mark : AUDIO ¥ Voltages are taken with a VOM (input impedance 10 MW). Voltage variations may be noted due to normal produc- tion tolerances. ¥ Signal path. F: AUDIO ¥ Abbreviation CND : Canadian Note: The components identi- fied by mark ! or dotted line with mark ! are criti- cal for safety. Replace only with part number specified.Note: Les composants identifiŽs par une marque ! sont critiques pour la sŽcuritŽ. Ne les remplacer que par une piŽce portant le numŽro spŽcifiŽ. ¥ Circuit Boards Location SA-WMS7 POWER SWITCH boardPOWER board LED board CONTROL board AUTO POWER boardMAIN boar d LINE IN/OUT jack SPEAKER IN/OU T terminal POWER SAVE switch