Sony d cs 901 service manual

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2 D-CS901 Flexible Circuit Board Repairing -Keep the temperature of the soldering iron around 270 ËšC dur- ing 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. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. On AC power adaptor -Use only the AC power adaptor supplied or recommended in Accessories (supplied/ optional). Do not use any other AC power adaptor. It may cause a malfunction. Polarity of the plug TABLE OF CONTENTS 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 IDENTIFÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY. 1. SERVICING NOTE ·························································· 3 2. GENERAL ·········································································· 4 3. DISASSEMBLY ································································ 5 3-1. Lid Upper, Cabinet (Front) ············································ 5 3-2. MD Assy (CDM-3125ER), MAIN Board ····················· 6 3-3. Motor Assy, Turn Table (Spindle) (M901) ···················· 6 3-4. Motor Assy (Sled) (M902), Optical Pick-up (DAX-25E) ·········································· 7 3-5. MAIN (SWITCH UNIT) Board, Hold Lever ················ 7 4. TEST MODE ······································································ 8 5. ELECTRICAL ADJUSTMENTS ······························· 11 6. DIAGRAMS ······································································ 12 6-1. Block Diagrams ··························································· 13 6-2. Printed Wiring Board -“ MAIN Board (Side A) -“ ······· 15 6-3. Printed Wiring Board -“ MAIN Board (Side B) -“ ······· 16 6-4. Schematic Diagram -“ MAIN Board (1/4) -“ ··············· 17 6-5. Schematic Diagram -“ MAIN Board (2/4) -“ ··············· 18 6-6. Schematic Diagram -“ MAIN Board (3/4) -“ ··············· 19 6-7. Schematic Diagram -“ MAIN Board (4/4) -“ ··············· 20 6-8. Printed Wiring Board -“ MAIN (SWITCH UNIT) Board -“ ···························· 21 6-9. Schematic Diagram -“ MAIN (SWITCH UNIT) Board -“ ···························· 22 6-10. IC Pin Function Descriptions ······································ 24 7. EXPLODED VIEWS ······················································ 33 6-1. Upper Lid Section ······················································· 33 6-2. Cabinet Section ··························································· 34 6-3. Cabinet Lower Section ················································ 35 6-4. Optical Pick-up Section (CDM-3125ER) ···················· 36 8. ELECTRICAL PARTS LIST ······································· 37

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3 D-CS901 SECTION 1 SERVICING NOTE 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.BEFORE REPLACING THE OPTICAL PICK-UP BLOCK Please be sure to check thoroughly the parameters as par the Optical Pick-Up Block Checking Procedures (Part No.: 9-960-027-11) issued separately before replacing the optical pick-up block. Note and specifications required to check are given below. -FOK output: IC601 yg pin When checking FOK, remove the lead wire to disc motor. -RF signal P-to-P value: 0.4 to 0.65 Vp-p LASER DIODE CHECK During normal operation of the equipment, emission of the laser diode is prohibited unless the upper lid is closed while turning ON the S801. (push switch type) The following checking method for the laser diode is operable. -Method: Emission of the laser diode is visually checked. 1. Open the upper lid. 2. Push the S801 as shown in Fig. 1. 3. Check the object lens for confirming normal emission of the laser diode. If not emitting, there is a trouble in the automatic power control circuit or the optical pick-up. During normal operation, the laser diode is turned ON about 2.5 seconds for focus searching. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT Fig. 1 Method to push the S801 S801