Sony d e 900 service manual
This is the 31 pages manual for sony d e 900 service manual.
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Extracted text from sony d e 900 service manual (Ocr-read)
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Ð 2 Ð TABLE OF CONTENTS 1. SERVICING NOTES ................................................ 3 2. GENERAL ................................................................... 4 3. DISASSEMBLY ......................................................... 7 4. SERVICE MODE ....................................................... 8 5. ELECTRICAL ADJUSTMENTS ......................... 9 6. DIAGRAMS 6-1. Block Diagram ................................................................ 13 6-2. Printed Wiring Board ...................................................... 16 6-3. Schematic Diagram ......................................................... 19 6-4. IC Pin Function Description ........................................... 28 7. EXPLODED VIEWS ................................................ 30 8. ELECTRICAL PARTS LIST ............................... 33Flexible Circuit Board Repairing ¥ Keep the temperature of the soldering iron around 270 ûC 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. 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 PUB- LISHED BY SONY. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.
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Ð 3 Ð SECTION 1 SERVICING NOTES NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro- static 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. Befor Replacing the Optical Pick-Up Block Please be sure to check thoroughly the parameters as par the ÒOp- tical Pick-Up Block Checking ProceduresÓ (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: IC501 !ª pin When checking FOK, remov the lead wire to disc motor. ¥ S curve P-to-P value: 2.5 Vp-p IC501 #Á pin When checking S curve P-to-P value, remove the lead wire to disc motor. ¥ RF signal P-to-P value: 0.8 - 1.2 Vp-p ¥ Traverse signal P-to-P value: 1 - 2.6 Vp-p ¥ The repairing grating holder is impossible. ¥ Adjusted part for tracking gain adjustment: RV504 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 emis- sion, observe from more than 30 cm away from the objective lens. Laser Diode Checking Methods During normal operation of the equipment, emission of the laser diode is prohibited unless the upper panel is closed while turning ON the S809 (push switch type). The following two checking methods for the laser diode are oper- able. ¥ Method (In the service mode or normal operation): Emission of the laser diode is visually checked. 1. Open the upper lid. 2. Push the S809 as shown in Fig. 1. 3. Press the ^ key. 4. 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 10 seconds for focus searching. S809 Fig. 1 Method to push the S809