Sony SCD XA777ES Service Manual

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2 SCD-XA777ES TABLE OF CONTENTS 1. SERVICING NOTES ............................................... 4 2. GENERAL ................................................................... 9 3. DISASSEMBLY 3-1. Disassembly flow ............................................................ 10 3-2. Case (Top) ....................................................................... 11 3-3. Loading Panel Assy ......................................................... 11 3-4. Front Panel Section ......................................................... 12 3-5. MAIN Board, Bracket (MAIN) ...................................... 12 3-6. Mechanism Deck (CDM19JB-DVBU4B/ CDM19JN-DVBU4B), RF Board ................................... 13 3-7. Disc Table, Belt, Loading Motor (M1) ........................... 13 3-8. Optical Pick-up (KHM-230AAA/J1NP) ........................ 14 3-9. Base Unit (DVBU4B) ..................................................... 15 4. TEST MODE .............................................................. 16 5. DIAGRAMS 5-1. Block Diagram -“ RF/SERVO Section -“ ........................ 31 5-2. Block Diagram -“ MAIN Section (1/2) -“ ....................... 32 5-3. Block Diagram -“ MAIN Section (2/2) -“ ....................... 33 5-4. Block Diagram -“ AUDIO Section (1/2) -“ ..................... 34 5-5. Block Diagram -“ AUDIO Section (2/2) -“ ..................... 35 5-6. Block Diagram -“ DISPLAY/POWER SUPPLY Section -“ ...................... 36 5-7. Note for Printed Wiring Boards and Schematic Diagrams ....................................................... 37 5-8. Printed Wiring Boards -“ LOADING MOTOR/RF/SWITCH Boards -“ .............. 38 5-9. Schematic Diagram -“ LOADING MOTOR/RF/SWITCH Boards -“ .............. 39 5-10. Printed Wiring Board -“ MAIN Board (Component Side) -“ .............................. 40 5-11. Printed Wiring Board -“ MAIN Board (Conductor Side) -“ ................................ 41 5-12. Schematic Diagram -“ MAIN Board (1/5) -“ .................. 42 5-13. Schematic Diagram -“ MAIN Board (2/5) -“ .................. 43 5-14. Schematic Diagram -“ MAIN Board (3/5) -“ .................. 44 5-15. Schematic Diagram -“ MAIN Board (4/5) -“ .................. 45 5-16. Schematic Diagram -“ MAIN Board (5/5) -“ .................. 46 5-17. Printed Wiring Board -“ D.OUT Board -“ ....................... 47 5-18. Schematic Diagram -“ D.OUT Board -“ .......................... 47 5-19. Printed Wiring Board -“ MOTHER Board (Component Side) -“ ........................ 48 5-20. Printed Wiring Board -“ MOTHER Board (Conductor Side) -“ ......................... 49 5-21. Schematic Diagram -“ MOTHER Board (1/2) -“ ............ 50 5-22. Schematic Diagram -“ MOTHER Board (2/2) -“ ............ 51 5-23. Printed Wiring Board -“ AUDIO FRONT Board -“ ......... 52 5-24. Schematic Diagram -“ AUDIO FRONT Board -“ ........... 53 5-25. Printed Wiring Board -“ AUDIO SURR Board -“ ........... 54 5-26. Schematic Diagram -“ AUDIO SURR Board -“ .............. 55 5-27. Printed Wiring Board -“ AUDIO C/SW Board -“ ............ 56 5-28. Schematic Diagram -“ AUDIO C/SW Board -“ .............. 57 5-29. Printed Wiring Board -“ PANEL Board -“ ...................... 58 5-30. Schematic Diagram -“ PANEL Board -“ ......................... 59 5-31. Printed Wiring Boards -“ HP/JOG/KEY/R.CNTL Boards -“ ................................ 60 5-32. Schematic Diagram -“ HP/JOG/KEY/R.CNTL Boards -“ ................................ 61 5-33. Printed Wiring Board -“ A-POWER Board -“ ................. 62 5-34. Schematic Diagram -“ A-POWER Board -“ .................... 63 5-35. Printed Wiring Board -“ D-POWER Board -“ ................. 64 5-36. Schematic Diagram -“ D-POWER Board -“ ................... 65 5-37. Printed Wiring Boards -“ AC/AC SW Boards -“ ............. 66 5-38. Schematic Diagram -“ AC/AC SW Boards -“ ................. 67 5-39. IC Pin Function Description ........................................... 76 6. EXPLODED VIEWS 6-1. Case Section .................................................................... 91 6-2. Front Panel Section ......................................................... 92 6-3. Bottom Section ................................................................ 93 6-4. Board Section-1 ............................................................... 94 6-5. Board Section-2 ............................................................... 95 6-6. Chassis Section ............................................................... 96 6-7. Mechanism Deck Section (CDM19JB-DVBU4B, CDM19JN-DVBU4B) .............. 97 6-8. Base Unit Section (DVBU4B) ........................................ 98 7. ELECTRICAL PARTS LIST ............................... 99 ATTENTION AU COMPOSANT AYANT RAPPORT Ã- LA SÉCURITÉ! LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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.

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3 SCD-XA777ES 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. Flexible Circuit Board Repairing - Keep the temperature of the soldering iron around 270 ËšC dur- ing 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. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. This applianc\f is classifi\fd\l as a \bLASS 1 LASER product. Th\f \bLASS 1 LASER PRODU\bT MARKING is locat\fd on th\f r\l\far \fxt\frior. Th\f following caution lab\fl \lis locat\fd insid\f th\f unit. 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, metallized 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 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 manufacturers 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 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 pas- sive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A) Fig. A. Using an AC voltmeter to check AC leakage. 1.5 k -„¦ 0.15 µF ACvoltmete r (0.75 V) To Exposed Metal Parts on Set Earth Ground This label is located on the left exterior. US and Canadian models AEP model