Sony STR-DE525 free download

File name STR-DE525,V515.pdf

STR-DE525/V515 SERVICE MANUAL Ver 1.1 2002. 01 US Model Canadian Model E Model Australian Model PX Model STR-DE525 Chinese Model STR-V515 Photo : STR-DE525 Dolby Laboratories Licensing Corporation. "DOLBY" the double-D symbol a "AC-3" and "PRO LOGIC" are trademarks of Dolby Laboratories Licensing Corporation. SPECIFICATIONS -- Continued on next page -- FM STEREO/FM-AM RECEIVER 9-922-797-12 2002A1600-1 © 2002.1 Sony Corporation Home Audio Company Published by Sony Engineering Corporation --2-- 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. TABLE OF CONTENTS 1. 2. 3. 3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10. 3-11. 3-12. 3-13. 3-14. GENERAL ······································································ 4 TEST MODE ···························································· 6 DIAGRAMS Circuit Boards Location ····················································· 7 Block Diagram -- Main Section -- ··································· 9 Block Diagram -- Power Section -- ······························· 11 Printed Wiring Board -- AMP Section -- ······················· 13 Schematic Diagram -- AMP Section -- ·························· 15 Printed Wiring Board -- Video Section -- ······················ 17 Schematic Diagram -- Video Section -- ························· 19 Printed Wiring Board -- Input Section -- ······················· 21 Schematic Diagram -- Input Section -- ·························· 23 Printed Wiring Board -- Display Section -- ··················· 25 Schematic Diagram -- Display Section -- ······················ 27 Printed Wiring Board -- Power Section -- ····················· 29 Schematic Diagram -- Power Section -- ························ 31 IC Block Diagrams ··························································· 35 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. 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) 2. 3. 4. EXPLODED VIEWS 4-1. Front Panel Section ·······································