Sony cdp ca 70 es service manual
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Ñ 2 Ñ TABLE OF CONTENTS 1. SERVICE NOTE ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááá 4 2. GENERAL ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááááá 7 3. DISASSEMBLY 3-1. Front Panel ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááááá 9 3-2. Disc Table Assembly and Disc Table and Press Pulley áááááá 9 3-3. Main Board ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááá 10 3-4. CDM Assembly ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááá 10 3-5. Optical Pick-up Block Assembly ááááááááááááááááááááááááááááááááááááá 11 3-6. Bracket (Gear) Assembly ááááááááááááááááááááááááááááááááááááááááááááááááá 11 4. TEST MODE ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááá 12 5. ELECTRICAL BLOCK CHECKING áááááááááááááááááááá 15 6. DIAGRAMS 6-1. Circuit Boards Location ááááááááááááááááááááááááááááááááááááááááááááááááááá\ 17 6-2. Block Diagram ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááá 19 6-3. Schematic Diagram BD Section ááááááááááááááááááááááááááááááááááááá 21 6-4. Printed Wiring Board BD Section áááááááááááááááááááááááááááááááááá 23 6-5. Printed Wiring Board Main Section áááááááááááááááááááááááááááááá 25 6-6. Schematic Diagram Main Section (1/2) ááááááááááááááááááááááááá 27 6-7. Schematic Diagram Main Section (2/2) ááááááááááááááááááááááááá 29 6-8. Schematic Diagram HP Section áááááááááááááááááááááááááááááááááááá 31 6-9. Printed Wiring Board HP Section áááááááááááááááááááááááááááááááááá 32 6-10. Schematic Diagram Display Section áááááááááááááááááááááááááááááá 33 6-11. Printed Wiring Board Display Section ááááááááááááááááááááááááááá 35 6-12. IC Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááá 37 6-13. IC Pin Functions ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááá 40 7. EXPLODED VIEWS 7-1. Front Panel and Case Section ááááááááááááááááááááááááááááááááááááááááááá 44 7-2. Back Panel and Disc Table Section áááááááááááááááááááááááááááááááááá 45 7-3. Chassis Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááá 46 7-4. Base Unit Section (BU-5BD22) ááááááááááááááááááááááááááááááááááááááá 47 8. ELECTRICAL PARTS LIST ááááááááááááááááááááááááááááááááááá 48
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Ñ 3 Ñ 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, observe from more than 30 cm away from the objective lens. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. 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 soldering iron around 270ûC 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 component in this product is capable of emitting radiation exceeding the limit for Class 1. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. 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.ATTENTION AU COMPOSANT AYANT RAPPORT Ë LA SƒCURITƒ! LES COMPOSANTS IDENTIFƒS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHƒMATIQUES ET LA LISTE DES PIéCES SONT CRITIQUES POUR LA SƒCURITƒ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIéSES SONY DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU DANS LES SUPPƒMENTS PUBLIƒS PAR SONY. SAFETY CHECK-OUT (US model only) After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, ÒmetallizedÓ knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE 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 microampers). 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 manufacturersÕ 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 ÒlimitÓ 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 2V AC range are suitable. (See Fig. A) Earth GroundAC voltmeter (0.75V) 1.5k ½ 0.15 µF Fig. A. Using an AC voltmeter to check AC leakage. To Exposed Metal Parts on Set