Sony scd c 2000 es service manual

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2 SCD-C2000ES Notes on chip component replacement- Never reuse a disconnected chip component. - Notice that the minus side of a tantalum capacitor may be damaged by heat. 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. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation e xposure. 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. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT LASER DIODE AND FOCUS SEARCH OPERATION CHECK Carry out the S curve check in CD section adjustment and check that the S curve waveform is output three times. 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 PA RT NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. A TTENTION 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 Q UE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY. T ABLE OF CONTENTS 1. SERVICING NOTES ................................................ 3 2. GENERAL ................................................................... 4 3. DISASSEMBLY 3-1. Disassembly Flow ........................................................... 7 3-2. Upper Case ...................................................................... 8 3-3. Loading Panel .................................................................. 8 3-4. Front Panel Section ......................................................... 9 3-5. CD Mechanism Deck (CDM79C-DVBU51) .................. 9 3-6. KEY Board, LED Board, DISPLAY Board .................... 10 3-7. Table Assy ....................................................................... 10 3-8. SE-130 Board, Td Unit Assy ........................................... 11 3-9. DC Motor (M901) ........................................................... 11 3-10. Pick-up Unit Section ....................................................... 12 3-11. RF Board, Pick-up Unit ................................................... 12 4. DIAGRAMS 4-1. Block Diagram ................................................................ 14 4-2. Printed Wiring Board - RF Section - ......................... 15 4-3. Schematic Diagram - RF Section - ........................... 16 4-4. Printed Wiring Board - MAIN Section - ................... 17 4-5. Schematic Diagram - MAIN Section (1/4) - ............ 18 4-6. Schematic Diagram - MAIN Section (2/4) - ............ 19 4-7. Schematic Diagram - MAIN Section (3/4) - ............ 20 4-8. Schematic Diagram - MAIN Section (4/4) - ............ 21 4-9. Printed Wiring Board - DISPLAY Section - ............ 22 4-10. Schematic Diagram - DISPLAY Section - ................ 23 4-11. Printed Wiring Board - MD-94 Board Section - ...... 24 4-12. Schematic Diagram - MD-94 Board Section - ......... 25 5. TEST MODE ............................................................... 28 6. EXPLODED VIEWS 6-1. Main Section .................................................................... 29 6-2. Front Panel Section ......................................................... 30 6-3. Chassis Section ................................................................ 31 6-4. CD Mechanism Section (1) (CDM79C-DVBU51) ......... 32 6-5. CD Mechanism Section (2) (CDM79C-DVBU51) ......... 33 7. ELECTRICAL PARTS LIST ................................ 34

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3 SCD-C2000ES SECTION 1 SERVICING NOTES HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF Insert a tapering driver into the aperture of the unit bottom, and turn in the direction of arrow. Use a flat (-) head screwdriver to open the disc tray by manual operation. (Flat head screwdriver with nominal blade length of 3mm.) * To close the disc table, turn the driver in the reverse direction. tapering driver 1 2 SAFETY CHECK-OUT After correcting the original service problem, perform the following 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 passive 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 AC voltmete r (0.75 V) To Exposed Metal Parts on Set Earth Ground