Sony htc nx300

Page 1

2 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. TABLE OF CONTENTS 1. SERVICING NOTES ............................................... 3 2. GENERAL Location of Controls ....................................................... 6 3. DISASSEMBLY ......................................................... 7 4. TEST MODE .............................................................. 14 5. MECHANICAL ADJUSTMENTS ....................... 15 6. ELECTRICAL ADJUSTMENTS TAPE DECK Section ...................................................... 15 CD Section ...................................................................... 18 VIDEO Section ............................................................... 19 7. DIAGRAMS 7-1. Block Diagram Ð SERVO Section Ð .............................. 21 7-2. Block Diagram Ð AUDIO/VIDEO CD Section Ð .......... 22 7-3. Block Diagram Ð TAPE DECK Section Ð ..................... 23 7-4. Block Diagram Ð POWER SUPPLY Section Ð ............. 24 7-5. Note for Printed Wiring Boards and Schematic Diagrams ....................................................... 25 7-6. Printed Wiring Board Ð BD Board Ð ............................. 26 7-7. Schematic Diagram Ð BD Board Ð ................................ 27 7-8. Schematic Diagram Ð VIDEO Board (1/2) Ð ................ 28 7-9. Schematic Diagram Ð VIDEO Board (2/2) Ð ................ 29 7-10. Printed Wiring Board Ð VIDEO Board Ð ....................... 30 7-11. Printed Wiring Boards Ð CD MOTOR/SENSOR Section Ð ................................ 32 7-12. Schematic Diagram Ð CD MOTOR/SENSOR Section Ð ................................ 33 7-13. Printed Wiring Board Ð AUDIO Board Ð ...................... 34 7-14. Schematic Diagram Ð AUDIO Board Ð ......................... 35 7-15. Printed Wiring Board Ð LEAF SW Board Ð .................. 36 7-16. Schematic Diagram Ð LEAF SW Board Ð ..................... 36 7-17. Printed Wiring Board Ð MAIN Board Ð ........................ 37 7-18. Schematic Diagram Ð MAIN Board (1/2) Ð .................. 38 7-19. Schematic Diagram Ð MAIN Board (2/2) Ð .................. 39 7-20. Printed Wiring Board Ð POWER Board Ð ..................... 40 7-21. Schematic Diagram Ð POWER Board Ð ........................ 41 7-22. Printed Wiring Boards Ð PANEL Section Ð .................. 42 7-23. Schematic Diagram Ð PANEL Section Ð ....................... 43 7-24. IC Pin Function Description ........................................... 48 8. EXPLODED VIEWS ................................................ 57 9. ELECTRICAL PARTS LIST ............................... 64

Page 2

3 SECTION 1 SERVICING NOTES The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emis- sion, observe from more than 30 cm away from the objective lens. Flexible Circuit Board Repairing ¥ Keep the temperature of the soldering iron around 270 ûC 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. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. The following caution label is located inside the unit. CAUTION : INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM. ADVARSEL : USYNLIG LASERSTRÅLING VED ÅBNING NÅR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE FOR STRÅLING. VORSICHT : UNSICHTBARE LASERSTRAHLUNG, WENN ABDECKUNG GEÖFFNET UND SICHEREITSVERRIEGELUNG ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN. VA R O ! :AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT- TIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN. VARNING : OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN. ADVERSEL : USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN. VIGYAZAT !:A BURKOLAT NYITÁSAKOR LÁTHATATLAN LÉZERSU- GÁRVESZÉLY ! KERÜLJE A BESUGÁRZÁST ! SELF-DIAGNOSIS This unit is equipped with a self-diagnosis function. The function is used for diagnosing the conditions of the circuits of the VIDEO board. The circuits can be determined if normal or abnormal by the light- ing of D502 of the VIDEO board. Lighting of D502 When lit : Operates normally Blinks repeatedly : The circuit may be faulty. [VIDEO Board] (Side B) CN501 SL501 SL502 SL50 3 CN502 IC505 D502 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.