Sony SAVA27 free download

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SAVA-27 SERVICE MANUAL US Model Canadian Model AEP Model UK Model E Model Australian Model Chinese Model (Rear) (R-ch) (L-ch) SPECIFICATIONS -- Continued on next page -- HOME THEATER ACTIVE SPEAKER SYSTEM MICROFILM TABLE OF CONTENTS TEST MODE ·································································· 3 1. 2. 3. 3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. GENERAL ······································································ 4 DISASSEMBLY DIAGRAMS Circuit Boards Location ····················································· 6 Schematic Diagram --Main Section -- ····························· 7 Printed Wiring Board --Main Section -- ························ 11 Schematic Diagram --Display Section -- ······················· 14 Printed Wiring Board --Display Section -- ···················· 17 IC Pin Function ································································ 20 IC Block Diagrams ··························································· 21 2-1. Removal Amplifier Block ·················································· 5 4. 4-1. 4-2. 4-3. 4-4. EXPLODED VIEWS System (L) Assy ······························································· 23 System (R) Assy ······························································· 24 Amplifier Section ····························································· 25 Rear Speaker Section ························································ 26 5. ELECTRICAL PARTS LIST ··································· 27 SAFETY CHECK-OUT 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. 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) 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. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. To Exposed Metal Parts on Set 0.15µF 1.5k AC voltmeter (0.75V) 2. Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. 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 COMPONENT