Sony pcm r 500 service manual

Page 1

Ð 2 Ð Flexible Circuit Board Repairing ·Keep the temperature of the soldering iron around 270 û C during repairing. ·Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). ·Be careful not to apply force on the conductor when soldering or unsoldering . Notes on chip component replacement ·Never reuse a disconnected chip component. ·Notice that the minus side of a tantalum capacitor may be dam- aged by heat. MODEL IDENTIFICATIONÐ Model Number label (Printed in Back Panel) Ð MODEL NO. PCM-R500 DIGITAL AUDIO TAPE DECK US, Canadian model : AC 120 V 60 Hz 34 W AEP Model : AC 230 V Ú 50/60Hz 34 W CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturerÕs instructions. ADVARSEL! Lithiumbatteri-Eksplosionsfare ved fejlagtig hŒndtering. Udskiftning mŒ kun ske med batteri af samme fabrikat og type. LevŽr det brugte batteri tilbage til leverand¿ren. ADVARSEL Eksplosjonsfare ved feilaktig skifte av batteri. Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten. Brukte batterier kasseres i henhold til fabrikantens instruksjoner. VARNING Explosionsfara vid felaktigt batteribyte. AnvŠnd samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren. Kassera anvŠnt batteri enligt fabrikantens instruktion. VAROITUS Paristo voi rŠjŠhtŠŠ, jos se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. HŠvitŠ kŠytetty paristo valmistajan ohjeiden mukaisesti.

Page 2

Ð 3 Ð SAFETY CHECK-OUT After correcting the original service problem, perform the follow- ing safety check 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 TEST 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). Leak- age 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 pas- sive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A) 1.5 k W 0.15 µF AC voltmeter (0.75 V) To Exposed Metal Parts on Set Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. TABLE OF CONTENTS 1. GENERAL ..................................................................... 4 2. DISASSEMBLY ............................................................ 15 3. ADJUSTMENTS .......................................................... 19 4. DIAGRAMS 4-1. Block Diagrams ................................................................. 26 4-2. Printed Wiring Board Ð RF Section Ð ................................ 33 4-3. Schematic Diagram Ð RF Section Ð ................................... 35 4-4. Printed Wiring Boards Ð MD Section Ð ............................. 38 4-5. Schematic Diagram Ð MD Section Ð ................................. 41 4-6. Printed Wiring Boards Ð DIGITAL Section Ð ................... 45 4-7. Schematic Diagram Ð DIGITAL Section Ð ........................ 49 4-8. Schematic Diagram Ð AUDIO Section Ð ........................... 53 4-9. Printed Wiring Boards Ð AUDIO Section Ð ....................... 57 4-10. Printed Wiring Boards Ð DISPLAY Section Ð ................... 61 4-11. Schematic Diagram Ð DISPLAY Section Ð ....................... 65 4-12. IC Pin Function Description .............................................. 72 5. EXPLODED VIEWS ................................................... 83 6. ELECTRICAL PARTS LIST .................................... 91 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 PUB- LISHED BY SONY.ATTENTION AU COMPOSANT AYANT RAPPORT Ë LA SƒCURITƒ! LES COMPOSANTS IDENTIFIƒS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHƒMATIQUES ET LA LISTE DES PIéCES SONT CRITIQUES POUR LA SƒCURITƒ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIéCES SONY DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU DANS LES SUPPLƒMENTS PUBLIƒS PAR SONY.