Philips-DVD-625-Service-Manual电路原理图.pdf
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1、Published by MW 0363 Service PaCECopyright 2003 Philips Consumer ElAll rights reserved. No part of this publretrieval system or transmitted, in anymechanical, photocopying, or otherwise wiDVD-Video Player DVD625DVD625 /001 /021 /051Power Supply Unit 27 28Front Board 29 30MPEG Board: Index (Diagram M
2、1) 31 36-37MPEG Board: RF Part (Diagram M2) 32 36-37MPEG Board: Servo Part (Diagram M3 33 36-37MPEG Board: Mem. & Audio (Diagram M4) 34 36-37MPEG Board: Video Part (Diagram M5) 35 36-37Printed in the Netherlands Subject to modification EN 3122 785 13390ectronics B.V. Eindhoven, The Netherlands. icat
3、ion may be reproduced, stored in a form or by any means, electronic, thout the prior permission of Philips.8 Alignments (Not Applicable) 399 Circuit Descriptions (Not Applicable) 3910 Spare Parts List 4010 Revision List 432 Safety Instructions, Warnings, Notes, and Service Hints 33 Directions for Us
4、e 54 Dismantling Instructions and Exploded View 175 Diagnostic Software, Trouble Shooting and Test Instructions 196 Wiring-, Block DiagramsBlock Diagram 25Wiring Diagram 267 Electrical Diagrams and Print-Layouts Diagram PWBCL 36532022_000.eps190303Contents Page1 Technical Specifications 2Technical S
5、pecificationsEN 2 DVD625 /0x11.1. Technical SpecificationsSafety Instructions, Warnings, Notes, and Service Hints EN 3DVD625 /0x1 2.2. Safety Instructions, Warnings, Notes, and Service Hints2.1 Safety Instructions2.1.1 General SafetySafety regulations require that during a repair: Connect the unit t
6、o the mains via an isolation transformer. Replace safety components, indicated by the symbol , only by components identical to the original ones. Any other component substitution (other than original type) may increase risk of fire or electrical shock hazard.Safety regulations require that after a r
7、epair, you must return the unit in its original condition. Pay, in particular, attention to the following points: Route the wires/cables correctly, and fix them with the mounted cable clamps. Check the insulation of the mains lead for external damage. Check the electrical DC resistance between the m
8、ains plug and the secondary side:1. Unplug the mains cord, and connect a wire between the two pins of the mains plug.2. Set the mains switch to the on position (keep the mains cord unplugged!).3. Measure the resistance value between the mains plug and the front panel, controls, and chassis bottom. 4
9、. Repair or correct unit when the resistance measurement is less than 1 M. 5. Verify this, before you return the unit to the customer/user (ref. UL-standard no. 1492).6. Switch the unit off, and remove the wire between the two pins of the mains plug.2.1.2 Laser SafetyThis unit employs a laser. Only
10、qualified service personnel may remove the cover, or attempt to service this device (due to possible eye injury).Laser Device UnitType : Semiconductor laser GaAlAsWavelength : 650 nm (DVD): 780 nm (VCD/CD)Output Power : 20 mW (DVD+RW writing): 0.8 mW (DVD reading): 0.3 mW (VCD/CD reading)Beam diverg
11、ence : 60 degreeFigure 2-1 Note: Use of controls or adjustments or performance of procedure other than those specified herein, may result in hazardous radiation exposure. Avoid direct exposure to beam.2.2 Warnings2.2.1 General All ICs and many other semiconductors are susceptible to electrostatic di
12、scharges (ESD, ). Careless handling during repair can reduce life drastically. Make sure that, during repair, you are at the same potential as the mass of the set by a wristband with resistance. Keep components and tools at this same potential. Available ESD protection equipment: Complete kit ESD3 (
13、small tablemat, wristband, connection box, extension cable and earth cable) 4822 310 10671. Wristband tester 4822 344 13999. Be careful during measurements in the live voltage section. The primary side of the power supply (pos. 1005), including the heatsink, carries live mains voltage when you conne
14、ct the player to the mains (even when the player is off!). It is possible to touch copper tracks and/or components in this unshielded primary area, when you service the player. Service personnel must take precautions to prevent touching this area or components in this area. A lightning stroke and a
15、stripe-marked printing on the printed wiring board, indicate the primary side of the power supply. Never replace modules, or components, while the unit is on.2.2.2 Laser The use of optical instruments with this product, will increase eye hazard. Only qualified service personnel may remove the cover
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