Philips-DVD-728-729-Service-Manual(1)电路原理图.pdf

Published by MW 0363 Service PaCE©Copyright 2003 Philips Consumer ElAll rights reserved. No part of this publretrieval system or transmitted, in anymechanical, photocopying, or otherwise wiDVD-Video Player DVD728/729/731DVD728-729 /001 /021 /051DVD731 /001Display Board 31 32AV Board 33 33SD5.4 MPEG Board: Index (Diagram M1) 34 39SD5.4 MPEG Board: RF Part (Diagram M2) 35 39SD5.4 MPEG Board: Servo Part (Diagram M3) 36 39SD5.4 MPEG Board: Memory & Audio Parts(Diagram M4) 37 39Printed in the Netherlands Subject to modification EN 3122 785 13700ectronics B.V. Eindhoven, The Netherlands. ication may be reproduced, stored in a form or by any means, electronic, thout the prior permission of Philips.SD5.4 MPEG Board: Video Part (Diagram M5) 38 398 Alignments (Not Applicable) 419 Circuit Descriptions (Not Applicable) 41List of Abbreviations (Not Applicable) 41IC Data 4210 Spare Parts List 4310 Revision List 463 Directions for Use 44 Mechanical- and Dismantling Instructions 175 Service Hints, Trouble Shooting,and Fault Finding 206 Wiring-, Block DiagramsBlock Diagram 27Wiring Diagram 28Testpoint Overview MPEG Board 297 Electrical Diagrams and Print-Layouts Diagram PWBPower Supply Unit 30 NACL 36532024_000.eps210303Contents Page1 Technical Specs and Connection Facilities 22 Safety Instructions, Warnings, Notes, 3Technical SpecificationsEN 2 DVD728-731 /0X11.1. Technical SpecificationsSafety Instructions, Warnings, Notes, and Service Hints EN 3DVD728-731 /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 to 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 repair, 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 mains 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. 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 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 divergence : 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 discharges (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 (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 connect 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 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 or attempt to service this device, due to possible eye injury. Repair handling should take place as much as possible with a disc loaded inside the player. Text below is placed inside the unit, on the laser cover shield:Figure 2-2 2.2.3 NotesDolbyManufactered under licence from Dolby Laboratories. “Dolby”, “Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories. Confidential Unpublished Works. ©1992-1997 Dolby Laboratories, Inc. All rights reserved.Figure 2-3 TrusurroundTRUSURROUND, SRS and symbol (fig 2-4) are trademarks of SRS Labs, Inc. TRUSURROUND technology is manufactured under licence frm SRS labs, Inc.Figure 2-4 CAUTION VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAM ADVARSEL SYNLIG OG USYNLIG LASERSTRÅLING VED ÅBNING UNDGÅ UDSÆTTELSE FOR STRÅLINGADVARSEL SYNLIG OG USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES UNNGÅ EKSPONERING FOR STRÅLEN VARNING SYNLIG OCH OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD BETRAKTA EJ STRÅLENVARO! AVATT AESSA OLET ALTTIINA NÄKYVÄLLE JA NÄKYMÄTTÖMÄLLE LASER SÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN VORSICHT SICHTBARE UND UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GEÖFFNET NICHT DEM STRAHL AUSSETSENDANGER VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN AVOID DIRECT EXPOSURE TO BEAM ATTENTION RAYO NNEMENT LASER VISIBLE ET INVISIBLE EN CAS D'OUVERTURE EXPOSITION DANGEREUSE AU FAISCEAU!Directions for UseEN 4 DVD728-731 /0X13.3. Directions for UseDirections for Use EN 5DVD728-731 /0X1 3.Directions for UseEN 6 DVD728-731 /0X13.Directions for Use EN 7DVD728-731 /0X1 3.Directions for UseEN 8 DVD728-731 /0X13.Directions for Use EN 9DVD728-731 /0X1 3.Directions for UseEN 10 DVD728-731 /0X13.