Sony CDP C5CS Service Manual

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2 CDP-C5CS 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 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. 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. TABLE OF CONTENTS 1. SERVICING NOTES ................................................ 3 2. GENERAL ................................................................... 4 3. DISASSEMBLY 3-1. Disassembly Flow ........................................................... 5 3-2. Case ................................................................................. 6 3-3. Front Panel Assy, IR-IN Board ........................................ 6 3-4. CD Mechanism Block (CDM59-5BD27) ........................ 7 3-5. Base Unit (BU-5BD27) ................................................... 7 3-6. Tray, Table Assy .............................................................. 8 3-7. SENSOR Board ............................................................... 8 3-8. JUNCTION Board, LOADING MOTOR Board ............. 9 3-9. Optical Pick-up ................................................................ 9 4. TEST MODE ............................................................... 10 5. ELECTRICAL ADJUSTMENT ............................. 13 6. DIAGRAMS 6-1. Block Diagram -“ BD Section -“ ....................................... 16 -“ Display Section -“ ......................................................... 17 6-2. Printed Wiring Board -“ BD Section -“ ............................. 18 6-3. Schematic Diagram -“ BD Section -“ ................................ 19 6-4. Printed Wiring Board -“ CDM59 COMB Section -“ ......... 20 6-5. Schematic Diagram -“ CDM59 COMB Section -“ ........... 21 6-6. Printed Wiring Board -“ MAIN Section -“ ........................ 22 6-7. Schematic Diagram -“ MAIN Section -“ ........................... 23 6-8. Printed Wiring Board -“ PANEL Section -“ ...................... 24 6-9. Schematic Diagram -“ PANEL Section -“ ......................... 25 7. EXPLODED VIEWS 7-1. Case Section .................................................................... 30 7-2. Front Panel Section ......................................................... 31 7-3. CD Mechanism Section (1) (CDM59-5BD27) ............... 32 7-4. CD Mechanism Section (2) (CDM59-5BD27) ............... 33 7-5. Base Unit Section (BU-5BD27) ...................................... 34 8. ELECTRICAL PARTS LIST .................................. 35

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3 CDP-C5CS SECTION 1 SERVICING NOTES 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. LASER DIODE AND FOCUS SEARCH OPERATION CHECK Carry out the S curve check in CD section adjustment and check that the S curve waveforms is output three times.CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. 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 UNITHOW TO OPEN THE DISC TABLE WHEN POWER SWITCH TURNS OFF Insert a tapering driver into the aperture of the unit bottom, and turn it in the direction of the arrow (to OUT direction). NOTE FOR MAIN GEAR INSTALLATION table tapering driver *To close the disc table, turn the tapering driver in the reverse direction (to IN direction). gear (U/D) gear (RV)gear, swing