Philips-FWD-872-Service-Manual电路原理图.pdf
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1、FWD872/55/98Copyright 2006 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior pe
2、rmission of Philips.Published by SL-ET 0650 Service Audio Printed in The Netherlands Subject to modificationDVD Mini SystemVersion 1.1CLASS 1LASER PRODUCT 3141 785 31181TABLE OF CONTENTSPageLocation of PC Boards .1-2Specifi cations .1-3Measurement Setup .1-4Service Aids, Safety Instruction, etc .1-5
3、 to 1-7Repair Instructions. 2Disassembly Instructions fr Reparaturen sind Original-Ersatzteile zu verwenden.Sicherheitsbauteile sind durch das Symbol !markiert.ILe norme di sicurezza esigono che lapparecchio venga rimessonelle condizioni originali e che siano utilizzati i pezzi di ricambioidentici a
4、 quelli specificati.Componenty di sicurezza sono marcati con !GBAfter servicing and before returning set to customer perform a leakagecurrent measurement test from all exposed metal parts to earth ground toassure no shock hazard exist. The leakage current must not exceed0.5mA.1-72 - 1 2 - 1REPAIR IN
5、STRUCTIONA C E G IKMAIN UNIT REPAIR CHART 1/3ALL FUNCTION VFD DISPLAY AND KEY POWERSUPPLYAUDIO LINEDIGITAL LINE DVD NO VIDEOAAll function No workingCheckall systemall cable is looseor bad INTPanel stanby LEDshow working or NotRE-insert and fix the cableCheckback power PCBF901 bad cause damageChangeF
6、901CheckCN9535V if rightCheckrepair control PCB Standby circuitCheck+5V power supply circuitCheckRB102Pin5=5VCheckrepair switch power circuit (about B)Checkall Voltage3.3V and 1.5V give circuitVCC=5VVCC33=3.3VVDD=1.5VCheckIC106 Pin203Pin186(osc frequency 27MHz)Repairmain pcb betweenU107 to IC106circ
7、uitBVFD display No showand key functionCheckcontrol pcb RB300,RB301cableloose or bad INTChecktestRB300Pin4=-24V Pin5=5VPin9,8=AC3.5VChecktest RB301Pin3/CLK,Pin4/DATAand pin2/CECheckVFD control PCB section badcause damageRE-insert and fix the cableCheckback power PCB power supply circuitCheckIC106AND
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