Сервисный мануал источника звука Sony SA-VE702

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SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
OR DOTTED LINE WITH
ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESECOMPONENTS WITH SONY PARTS WHOSE PART NUMBERSAPPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTSPUBLISHED BY SONY.
After correcting the original service problem, perform thefollowing 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 asdescribed below.
The AC leakage from any exposed metal part to earth groundand from all exposed metal parts to any exposed metal part havinga return to chassis, must not exceed 0.5 mA (500 microamperes).Leakage current can be measured by any one of three methods.
A commercial leakage tester, such as the Simpson 229 or RCAWT-540A. Follow the manufacturers' instructions to use theseinstruments.
A battery-operated AC milliammeter. The Data Precision 245digital multimeter is suitable for this job.
Measuring the voltage drop across a resistor by means of aVOM or battery-operated AC voltmeter. The "limit" indicationis 0.75 V, so analog meters must have an accurate low-voltagescale. The Simpson 250 and Sanwa SH-63Trd are examples ofa passive VOM that is suitable. Nearly all battery operateddigital multimeters that have a 2V AC range are suitable. (SeeFig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
ACVoltmeter(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
ATTENTION AU COMPOSANT AYANT RAPPORT
? LA S?CURIT?!
LES COMPOSANTS IDENTIF?S PAR UNE MARQUE
DIAGRAMMES SCH?MATIQUES ET LA LISTE DES PI?CES SONTCRITIQUES POUR LA S?CURIT? DE FONCTIONNEMENT. NEREMPLACER CES COMPOSANTS QUE PAR DES PI?SES SONYDONT LES NUM?ROS SONT DONN?S DANS CE MANUEL OUDANS LES SUPP?MENTS PUBLI?S PAR SONY.