Sony zs m 50 service manual

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Ð 2 Ð Specifications ........................................................................... 1 1. SERVICE NOTE ........................................................... 3 2. GENERAL ...................................................................... 5 3. DISASSEMBLY 3-1. Cabinet (Front) Sub ASSY, Cabinet (Rear) Sub ASSY ......................................... 7 3-2. Control (L) Board ...................................................... 8 3-3. Control (R) Board ..................................................... 8 3-4. Control (F) Board, JOG Board .................................. 8 3-5. BATT Board .............................................................. 9 3-6. Power Board .............................................................. 9 3-7. Tuner Board, Antenna SW Board ............................. 9 3-8. Center Block Section .............................................. 10 3-9. Cabinet (Upper), Chassis (Main) ............................ 10 3-10. Optical Pick-up ASSY, CD Motor Board ................. 11 3-11. Control SW Board .................................................... 11 3-12. Motor Board, Belt, Motor (M703) ........................... 11 3-13. LCD Board, BL Board ............................................ 12 3-14. Audio Board ............................................................ 12 3-15. Line Board ............................................................... 13 3-16. Main Board ............................................................. 13 3-17. MD Block ASSY ..................................................... 14 3-18. DG Board ................................................................ 14 3-19. Chassis (MD) .......................................................... 15 3-20. BD Board ................................................................ 15 3-21. Sub Chassis ASSY, MD Mechanism Deck ............. 16 3-22. Shutter ASSY .......................................................... 16 3-23. SW Board ................................................................ 17 3-24. ÒHead, Over WriteÓ, Slider ASSY .......................... 17 3-25. MD Optical Pick-up Block ..................................... 18 4. TEST MODE 4-1. Caution When Using the Test Mode ......................... 19 4-2. Test Mode Settings ................................................... 19 4-3. Releasing the Test Mode ........................................... 19 4-4. Basic Operations of the Test Mode ........................... 19 4-5. Selecting the Test Mode ............................................ 19 4-6. Functions of Other Buttons ...................................... 20 4-7. Test Mode Display .................................................... 20 TABLE OF CONTENTS 5. ADJUSTMENTS MD Section ...................................................................... 21 CD Section ....................................................................... 24 Display Section ................................................................ 25 Tuner Section ................................................................... 26 6. DIAGRAMS 6-1. Explanation of IC Terminals ................................... 28 6-2. Block Diagram (Main Section) ............................... 35 6-3. Block Diagram (MD Section) ................................. 39 6-4. Printed Wiring Boards ÐMain Section Ð ................. 43 6-5. Schematic Diagram ÐMain Section (1/3) Ð ............. 47 6-6. Schematic Diagram ÐMain Section (2/3) Ð ............. 51 6-7. Schematic Diagram ÐMain Section (3/3) Ð ............. 55 6-8. Printed Wiring Boards ÐAudio Section Ð ................ 58 6-9. Schematic Diagram ÐAudio Section Ð .................... 61 6-10. Schematic Diagram ÐDG Section Ð ........................ 66 6-11. Printed Wiring Boards ÐDG Section Ð .................... 71 6-12. Printed Wiring Boards ÐTuner Section Ð ................ 73 6-13. Schematic Diagram ÐTuner Section Ð ..................... 75 6-14. Schematic Diagram ÐControl Section Ð .................. 78 6-15. Printed Wiring Boards ÐControl Section Ð ............. 81 6-16. Printed Wiring Boards ÐBD Section Ð .................... 83 6-17. Schematic Diagram ÐBD Section Ð ........................ 85 7. EXPLODED VIEWS 7-1. Rear Cabinet Section ................................................ 95 7-2. Front Cabinet Section ............................................... 96 7-3. Center Block Section ................................................ 97 7-4. Upper Cabinet Section .............................................. 98 7-5. MD Section (1) ......................................................... 99 7-6. MD Section (2) ....................................................... 100 7-7. CD Optical Pick-up Section ................................... 101 8. ELECTRICAL PARTS LIST ................................. 102

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Ð 3 Ð NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown 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 emission, ob- serve more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK 1. Close the lid for CD. 2. Press CD ß button. 3. Confirm the laser diode emission while observing the objecting lens. When there is no emission, Auto Power Control circuit or Optical Pick-up is broken. Objective lens moves up and down once for the focus search. CAUTION DURING WHEN MOUNTING THE PULLEY FOR THE CD DOOR MOTOR (M703) Make the following adjustment when mounting the CD door motor (part number : 1-763-224-11) and motor pulley (part number : 2- 627-174-01) of the CD section. Specification : A = 0.9 to 1.1mm SECTION 1 SERVICE NOTE 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 PUBLISHED BY SONY. Flexible Circuit Board Repairing ¥ Keep the temperature of the soldering iron around 270¡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. CHUCK PLATE JIG ON REPAIRING On repairing CD section, playing a disc without the CD lid, use Chuck Plate Jig. ¥ Code number of Chuck Plate Jig : X-4918-255-1