Philips-FWD-872-Service-Manual电路原理图.pdf

FWD872/55/98©Copyright 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 permission 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 to 1-7Repair Instructions. 2Disassembly Instructions für 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 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 INSTRUCTIONA 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 damageChangeF901CheckCN9535V 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 IC106circuitBVFD 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 IC300CPower supplyNo workingAll voltageNo outputCheckF901 badCauseDamageChangeF901+12V No output+5V No output-27V No outputCheckD959 and itsconjoint partCheckD960 and itsconjoint partCheckD963 and itsconjoint partYESNONOBADNOYESYESWORKNOCHECKCORRECTYESYESYESNONONONOYESNOYESYESBNO WORKINGNO SHOWFUNCTIONNO WORKINGNO OUTPUTNO OUTPUTD F H JUSB FUNCTION NO WORKINGMIC FUNCTION NO WORKINGTUNER FUNCTION NO WORKINGAUX IN NO SOUNDTAPE FUNCTION NO WORKING2 - 1 2 - 1REPAIR INSTRUCTIONA 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 damageChangeF901CheckCN9535V 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 IC106circuitBVFD 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 IC300CPower supplyNo workingAll voltageNo outputCheckF901 badCauseDamageChangeF901+12V No output+5V No output-27V No outputCheckD959 and itsconjoint partCheckD960 and itsconjoint partCheckD963 and itsconjoint partYESNONOBADNOYESYESWORKNOCHECKCORRECTYESYESYESNONONONOYESNOYESYESBNO WORKINGNO SHOWFUNCTIONNO WORKINGNO OUTPUTNO OUTPUTD F H JUSB FUNCTION NO WORKINGMIC FUNCTION NO WORKINGTUNER FUNCTION NO WORKINGAUX IN NO SOUNDTAPE FUNCTION NO WORKING2 - 2 2 - 2DAudio line No outputCheck JK700 isgood or badCheck IC500pin4=-12VCheckIC500 toCheck12V and IC106 ciruitCheck IC106 andits conjaint partRepair betweenand IC106 ciruitIC500 to JK700Change JK700supply circuitEDigital line No outputcheck IC109Check 5V Check betweensupply circuitIC106 Pin95 circuitpin14= 5VJK201 TOCheck IC106circuitFDVDNo VideoCheck JK102 isgood or badChangeJK102CheckJK100 isgood or badChange JK100Check betweenIC106 circuitJK100 TORepairbetweenIC106 circuitJK100 TOCheckIC106 andits around partpin8=12VMAIN UNIT REPAIR CHART 2/3BADNOYESYESNOOKOKBADNOYESYESBADOKOKNOGUSB FUNCTION NO WORKINGCheck USB pcb CN104 cableloose or bad INTRE-insert and fix the cableYESChecktest CN104Pin1=5V CheckUSB JK&PCB section bad cause damageCheck back powerPCB power supply circuitNONOYESJK700IC301,IC500