Philips-DVD-731-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 DVD728/729/731DVD728-729 /001 /021 /051DVD731 /001Display Board 31 32AV Board 33 33SD5.4 MPEG B

2、oard: 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

3、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 Revi

4、sion 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

5、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, Warn

6、ings, 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 comp

7、onent 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

8、 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

9、(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.

10、 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 GaA

11、lAsWavelength : 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

12、 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 s

13、et 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 t

14、he 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 ser

15、vice 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.

16、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

17、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 r

18、eserved.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 LASERSTRLIN

19、G VED BNING UNDG UDSTTELSE FOR STRLINGADVARSEL SYNLIG OG USYNLIG LASERSTRLING NR DEKSEL PNES UNNG EKSPONERING FOR STRLEN VARNING SYNLIG OCH OSYNLIG LASERSTRLNING NR DENNA DEL R PPNAD BETRAKTA EJ STRLENVARO! AVATT AESSA OLET ALTTIINA NKYVLLE JA NKYMTTMLLE LASER STEILYLLE. L KATSO STEESEEN VORSICHT SI

20、CHTBARE UND UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GEFFNET 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 DOUVERTURE 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.