Sony mce cx 80 k service manual

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2 1. SERVICING NOTES ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááá 3 2. TEST MODE ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááááá 4 3. GENERAL ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááááááááá 6 4. DISASSEMBLY 4-1. UPPER CASE, BOTTOM PLATE, FRONT PANEL áááááááá 7 4-2. BACK PANEL AND DISC TABLE áááááááááááááááááááááááááááááááááá 7 4-3. DISP, SWI, VOL AND KARAOKE MIC BOARDS ááááááááá 8 4-4. CD MECHANISM DECK (CDM59-5BD24) ááááááááááááááááááá 8 4-5. JACK, VIDEO AND MAIN BOARDS ááááááááááááááááááááááááááááá 9 4-6. BASE UNIT (BU-5BD24) ááááááááááááááááááááááááááááááááááááááááááááááááá 9 4-7. TABLE ASSÕY ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááá 10 4-8. TRAY, BELT (ROTARY) AND SENSOR BOARD áááááááá 10 4-9. BELT (LOADING) AND LOADING MOTOR BOARD áááááááááááááááááááááááááááááááá 11 4-10. ADJUSTING PHASE OF SWING GEAR AND GEAR (U/D) áááááááááááááááááááááááááááááááá 12 5. ELECTRICAL ADJUSTMENTS CD Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááááááá 13 6. DIAGRAMS 6-1. Block Diagrams · Servo Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááá 14 · Audio/Video Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áá 15 · Disp/Key Control/ Power Supply Section ááááááááááááááááááááá 16 6-2. Circuit Boards Location ááááááááááááááááááááááááááááááááááááááááááááááááááá\ 17 6-3. Printed Wiring Board Ð Video Section Ð áááááááááááááááááááááááááá 21 6-4. Schematic Diagram Ð Video Section (1/2) Ð ááááááááááááááááááá 22 6-5. Schematic Diagram Ð Video Section (2/2) Ð ááááááááááááááááááá 23 6-6. Schematic Diagram Ð BD Section Ð áááááááááááááááááááááááááááááááá 24 6-7. Printed Wiring Board Ð BD Section Ð ááááááááááááááááááááááááááááá 25 6-8. Schematic Diagram Ð Main Section Ð ááááááááááááááááááááááááááááá 26 6-9. Printed Wiring Board Ð Main Section Ð ááááááááááááááááááááááááááá 27 6-10. Schematic Diagram Ð Disp Section Ð áááááááááááááááááááááááááááááá 28 6-11. Printed Wiring Board Ð Disp Section Ð ááááááááááááááááááááááááááá 29 6-12. Printed Wiring Board Ð JUNCTION/LOADING/MOTOR Section Ð áááááááááááááááá 30 6-13. Schematic Diagram Ð JUNCTION/LOADING/MOTOR Section Ð áááááááááááááááá 31 6-14. IC Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááá 32 6-15. IC Pin Function Descriptions ááááááááááááááááááááááááááááááááááááááááááá 34 7. EXPLODED VIEWS 7-1. CASE SECTION ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááá 40 7-2. FRONT PANEL SECTION ááááááááááááááááááááááááááááááááááááááááááááá 41 7-3. CHASSIS SECTION ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááá 42 7-4. CD MECHANISM DECK SECTION-1 (CDM59-5BD24) ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááá 43 7-5. CD MECHANISM DECK SECTION-2 (CDM59-5BD24) ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááá 44 7-6. BASE UNIT SECTION (BU-5BD24) ááááááááááááááááááááááááááááá 45 8. ELECTRICAL PARTS LIST ááááááááááááááááááááááááááááááááááááá 46Notes 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. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. The following caution label is located inside the unit. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. 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 PUBLISHED BY SONY. TABLE OF CONTENTS

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3 SECTION 1 SERVICING NOTES The laser diode in the optical pick-up block may suffer electrostatic 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 emission, observe from more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK Carry out the ÒS curve checkÓ in ÒCD section adjustmentÓ and check that the S curve waveform is output repeatedly.NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF Insert a tapeing driver into the aperture of the unit bottom, and turn in the direction of arrow (to OUT direction). * To close the disc table, turn the driver in the reverse direction (to IN direction).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 lighting of D502 on the VIDEO board. Lighting of D502 When lit : Operates normally Blinks repeatedly : The circuit may be faulty. [VIDEO Board] (Side B) table tapering driver D502 IC505 The following extension cable is required to check and adjust the VIDEO board. J-2501-155-A CN601/MAIN « CN451/VIDEO J-2501-156-A CN906/MAIN « CN453/VIDEO J-2501-157-A CN101/BD « CN501/VIDEO * To close the disc table, turn the tapering driver in the reverse direction (to IN direction).