Sony d e 440 service manual

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Ð 2 Ð Specifications ............................................................................ 1 1. SERVICING NOTES ................................................... 3 2. GENERAL ...................................................................... 4 3. DISASSEMBLY 3-1. Lid Assy, Upper .......................................................... 5 3-2. Cabinet (Front) Assy, Cabinet (Rear) Assy, MD Assy ..................................................................... 5 3-3. Main Board ................................................................. 6 4. SERVICE MODE.................................................... 7 5. ADJUSTMENTS .......................................................... 8 6. DIAGRAMS 6-1. Explanation of IC Terminals ...................................... 11 6-2. Block Diagram .......................................................... 13 6-3. Printed Wiring Boards .............................................. 16 6-4. Schematic Diagram ................................................... 19 7. EXPLODED VIEWS 7-1. Cabinet Section ......................................................... 28 7-2. Optical Pick-up Section ............................................ 30 8. ELECTRICAL PARTS LIST ................................... 31 ATTENTION AU COMPOSANT AYANT RAPPORT Ë LA SƒCURITƒ! LES COMPOSANTS IDENTIFIƒS 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 PIéCES SONY DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU DANS LES SUPPLƒMENTS PUBLIƒS PAR SONY.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.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. 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. TABLE OF CONTENTS This Compact Disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the bottom exterior. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. DANGER Invisible laser radiation when open and interlock failed or defeated. Avoid direct exposure to beam. D-E441SR AC power adaptor (1) Earphones (1) Active speaker system (1) D-E443 AC power adaptor (1) Earphones (1) Rechargeable battery (1) AC plug adaptor (1)* * Supplied with E33, E13 and EA models D-E445 AC power adaptor (1) Headphones with remote control (1) * 1 Earphones with remote control (1) * 2 Rechargeable battery (1) AC plug adaptor (1)* 3 *1Supplied with US model *2Not supplied with US model *3Supplied with E13 model D-E446CK AC power adaptor (1) Headphones (1) * 1 Earphones (1) * 2 Car battery cord (1) Car connecting pack (1) Velcro tape (2) Spare fuse (1) Spiral tube (1) AC plug adaptor (1)* 3 *1Supplied with US model *2Not supplied with US model *3Supplied with E33, E13 and EA models D-E449CK AC power adaptor (1) Rechargeable battery (1) Headphones with remote control (1) Car battery cord (1) Car connecting pack (1) Velcro tape (2) Spare fuse (1) Spiral tube (1) Design and specifications are subject to change without notice.

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Ð 3 Ð 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 30cm away from the objective lens. Before Replacing the Optical pick-up Block Please be sure to check thoroughly the parameters as per the ÒOptical pick-up Block Checking ProcedureÓ (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, remove the lead wire to disc motor. ¥ S curve P-to-P value : 1.2±0.3Vp-p IC501 #Á pin. (Connect pin !ª of IC501 (TP880) and 3 of IC501 (GND) with a jumper wire). When checking S curve P-to-P value, remove the lead wire to disc motor. ¥ Adjusted part for focus gain adjustment : RV503 ¥ RF signal P-to-P value : 0.8 Ð 1.2Vp-p ¥ Traverse signal P-to-P value : 1.0 Ð 2.4Vp-p ¥ The repairing grating holder is impossible. ¥ Adjusted part for tracking gain adjustment : RV502 SECTION 1 SERVICING NOTES Precautions for Checking Emission of Laser Diode Laser light of the equipment is focused by the object lens in the optical pick-up so that the light focuses on the reflection surface of the disc. Therefore, be sure to keep your eyes more then 30cm apart from the object lens when you check the emission of laser diode. 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 S801 (push switch type). The following two checking methods for the laser diode are operable. Method-1 (In the service mode or normal operation) : 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. Fig. 2 Digital Voltmeter Connecting Location NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT Method-2 (In the service mode or normal operation) : Check the value of current flowing in the laser diode. 1. Remove the upper panel. 2. Read the current printed on the rear side of the optical pick-up. (Print on the rear side of the optical pick-up) 3. Connect a level meter as shown in Fig. 2 4. Press the ^ key. Fig.1 Method to push S801 AC2211397 year version month A : less than 48 mA current value date line No.shift No. 5. Calculate the current value by the reading of the digital voltmeter. Reading of the tester (V) Ö 4.7 ( W ) = current value (A) (Example) Reading of the digital voltmeter of 0.2256 V : 0.2256 V Ö 4.7 W = 0.048 (A) = 48 mA 6. Check that the current value is within the following range. +5 ¥ Current value of the label -11 mA(25°C) Variation by temperature : 0.4mA / °C Current increases with temperature increased. Current decreases with temperature decreased. If the current is more than the range above, there is a trouble in the automatic power control circuit or the laser diode is in deterioration. If less than the range, a trouble exists in the automatic power control circuit or the optical pick-up. [MAIN BOARD] (Conductor side) S801 TP506 digital voltmeter TP547