Philips-PET-720-Service-Manual电路原理图.pdf

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1、DVD Portable Player PET720 All version 3141 785 30972 Version 1.2 TABLE OF CONTENTS Chapter Technical Specification 1 Safety Instructions 2 Instruction for Use3 Mechanical Instructions 4 Troubleshooting & Service Tips 5 Overall Block Diagram 6 Overall Wiring Diagram 7 Electrical Diagram 8 Component

2、Layout. 9 Exploded View Diagram & Service Part List.10 Revision List. 11 Service Manual OSD TEST CONFIGURATION SETUP Copyright 2005 Philips Consumer Electronics B.V. Eindhoven, The Netherlands All rights reserved. No part of this publication may by reproduced, stored in a retrieval system or transmi

3、tted, in any form or by any means, electronics, mechanical, photocopying, or otherwise without the prior permission of Philips 1.0 TECHNICAL SPECIFICATION General Dimensions (WxLxH) : 19.4 x 17.1 x 3.2 cm 7.6 x 6.77 x 1.3 inches Weight : 0.86 kg / 1.89 lb Power supply : DC 9V 2.2A Power consumption

4、: 30W Operating temp. range : 0 - 50C (32 122F) Laser wavelength: 650nm Video system : NTSC / PAL / AUTO Frequency response : 20Hz 20KHz 1dB Signal/noise ratio 85dB Audio distortion + noise 80(1KHz) Channel separation: 85dB Dynamic range 80dB Output Audio out (analog audio) Output level: 2V 10% Load

5、 impedance: 10K Video out Output level: 1Vp - p 20% Load impedance: 75 Current consumption DC-IN SUPPLY (9.0V) Battery Charging Current 1.2A typ. BATT. SUPPLY (7.2V) Power Off 0A Playback with TFT on 2.5hrs Headphone out (headphone output load 2x16 ohm) Maximum output power : 10Mw Frequency response

6、 : 20Hz - 20kHz SNR (A-wght) : 80dB typ. THD (1kHz) : BTo repeat or loop a sequencein a titlePLAY-MODESelects play order options7 0 - 9Numeric keypad8 MUTEMuting play volumeREPEATRepeats chapter / title / disc9 RETURNFor VCD menu pageANGLESelects DVD camera angleSUBTITLESubtitle language selectorLAN

7、GUAGELanguage selectorMENUDisplays MENU pageSETUPEnters SETUP menuRemote ControlUp / down / left / right cursorConfirms selectionOn Screen Display on / offINFRA RED PORTBATTERY COMPARTMENT1011121314Pause playbackPress twice to stop playback/For previous ( ) or next ( )chapters, tracks or titles/Sear

8、ch backward ( ) or searchforward ( )Starts / resumes playbackVOLUMEVolume control4.0 MECHNICAL INSTRUCTIONSFig.1soldered1. Back View as Fig.1Remove screws to remove base2. Disconnect key control wire and 20 pins harness,Remove screws to dismentle the plate,Soldered short pattern for laser diode as F

9、ig.23.Fig.2Remove DVD driver and main board as Fig.3,4Disconnect DVD driver and main boardFig.34. Remove key board and other parts as Fig.5Fig.55. Remove top cover as Fig.6Fig.4Remove DVD driver and main boardFig.66. Disconnect speakers and IF boardRemove IF board as Fig.7.7.Fig.7Remove TFT shield,

10、HV board andLCD TFT as Fig.8,9.Fig.9Fig.820 pins harnesskey control wire5.0 TROUBLESHOOTING & SERVICE TIPSProcedure to change regioncode1. Power on player and open DVD Door.2. Press at Remote Control. In select .3. For PET720 - Press successively 2 1 2 2 2 5. . .4. Display will show for Europe:5. Pr

11、ess key to input preference region code (see below table).6. Switch off and re-switch on the product.Verify Region code change done.7.Region Code Region1 USA2 EUROPE3 ASIA PACIFIC4AUSTRALIA,NEW ZEALAND,LATAM5RUSSIA, INDIA6CHINAREMARKS:1. Password is CONFIDENTIAL.2. Region code is printed on product

12、type plate. Due to DVD legislation region codesdifferent to assigned region may not be released.5.0 TROUBLESHOOTING & SERVICE TIPS noreplace cable/adapterSYMPTOM: NO POWER, NO GREEN LEDCheck if thepower cableandAC adapterOK?No defect, returnset to customeryesstartset OK?Check if thepower and playbutton OK?replace connectorand switch unitreplace MAINBOARDgo to otherSYMPTOMnoyesyesnoreplace DVD driveSYMPTOM: NO IMAGE OR SOUND COMES OUT FROM THE EXTERNAL OUTPUTstartCheckoperation ofthe DVD drive.Does the DVDdrive work?yesnoReplace the mainboard or theconnector