Philips-MRD-300-Service-Manual电路原理图.pdf

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1、CLASS 1LASER PRODUCTServiceServiceServiceMRD300/37Copyright 2003 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in a retrieval system ortransmitted, in any form or by any means, electronic, mechanical, photocopyi

2、ng, or otherwisewithout the prior permission of Philips.Published by KC-ET0332 Service Audio Printed in The Netherlands Subject to modification GB3139 785 30450DVD ReceiverVersion 1.0TABLE OF CONTENTSPageLocation of PC Boards.1-2Versions Variation fr Reparaturen sind Original-Ersatzteile zu verwende

3、n.ILe norme di sicurezza esigono che lapparecchio venga rimessonelle condizioni originali e che siano utilizzati i pezzi di ricambioidentici a quelli specificati.“After servicing and before returning set to customer perform aleakage current measurement test from all exposed metal parts toearth groun

4、d to assure no shock hazard exist. The leakage currentmust not exceed 0.5mA.“CLASS 1LASER PRODUCT3122 110 03420GB Warning !Invisible laser radiation when open.Avoid direct exposure to beam.S Varning !Osynlig laserstrlning nr apparaten r ppnad och sprrenr urkopplad. Betrakta ej strlen.SF Varoitus !Av

5、atussa laitteessa ja suojalukituksen ohitettaessa olet alttiinankymttmlle laseristeilylle. l katso steeseen!DK Advarse !Usynlig laserstrling ved bning nr sikkerhedsafbrydere erude af funktion. Undg udsaettelse for strling.1) System Reseta) Press SETUP button on R/C. TV show setup menub) Select the m

6、enu using the 1 / 2 / 3 / 4 buttons on R/Cc) Go Preference setup page to do system resetd) Press OK or SETUP to confirm or exit setup menuSystem, Region code, Tuner, etc. setting procedure2) Region Code Changea) Put the player in stop mode and no disc loaded.b) Press the following key on remote cont

7、rol:c) The current region code is displayed on OSD.d) Then press 4 to select the region code you want.e) Press OK to confirm your selection.* After the Region Code is changed it is necessary to resetthe system so that the new Region Code will be fullyeffective. All customer setting will be lost.* On

8、 top of the maximum number of times allowed forchanging the region code is changed to 25.* When the counter reach 25, you will not be able to furtherchange the code until you reset the timer by the RegionCode timer reset procedure4) Video out changea) Press SETUP on R/C buttonb) Select the menu usin

9、g the 1 / 2 / 3 / 4 buttons on R/Cc) Go General setup page select Video out itemd) Press OK or SETUP to confirm or exit setup menu5) Password Changea) Press SETUP on R/C buttonb) Select the menu using the 1 / 2 / 3 / 4 buttons on R/Cc) Go Preference setup page select PASSWORD, press 2 toselect CHANG

10、E, Press OK.d) Press the old password (1234) button on R/C.e) Using the numeric keys (09) to enter the new passwordf) Press OK or SETUP to confirm or exit setup menu6) Set Parental Control Levela) Press SETUP on R/C buttonb) Select the menu using the 1 / 2 / 3 / 4 buttons on R/Cc) Go Preference setu

11、p page select PARENAL, press 2 toselect 8 ADULTd) Enter PASSWORD (1234)* 1234 is the default password supplied.e) Press OK or SETUP to confirm or exit setup menu7) Checking on the Software versiona) In no disc mode, “NO DISC“ will be shown on OSDb) Press DISC NO, then press 1, 2, 3, OK on the remote

12、controlc) TV will show the current software version Number onscree.MCU 0.6.VER 0721 1 US 08) Upgrading new softwarea) Open the CD-door, then insert the CD-R program disc.b) Close the CD-door.c) TV will show:-.“disc loading“.“bank30.rom“.“writing“ about 6 seconds.“Done“CAUTION !This information is co

13、nfidencial and maynot be distributed. Only a qualified serviceperson should reprogram the Region Code.3) Tuner area changea) Put the player in stop mode and no disc loaded.b) Press the following key on remote control:c) The current region code is displayed on OSD.d) Then press 4 to select the region

14、 code you want.e) Press OK to confirm your selection, the system will remainoriginal status if no any button is pressed within 5 seconds.* Please refer to the above different tuner area.2-1AM 530K 1710K 10KAM 531K 1620K 9KAM 531K 1620K 9KAM 530K 1710K 10KN/Z AM 531K 1620K 9KAREA BAND FREQUENCY (Hz)

15、STEP (Hz)USA FM 87.5M 108M 100KAPAC FM 87.5M 108M 50KEUROPE FM 87.5M 108M 50KLATAM FM 87.5M 108M 50KAUSTRALIA FM 87.5M 108M 50K2-12-2REPAIR INSTRUCTIONS2-2PILIPS MRD300 REPAIR CHARTMAIN UNIT REPAIR CHARTABCDEFGHI JALL FUNCTIONNO WORKINGVFD DISPLAYNO SHOWAND KEY FUNCTIONDVD NO SOUNDPOWER SUPPLYNO WOR

16、KINGAUDIO OUTPUTNO SOUNDAUX/TV INNO SOUNDTUNERNO SOUNDEAR HEAD PHONENO SOUNDAUDIO LINENO OUTPUPTDIGITAL LINENO SOUNDAALL FUNCTIONNO WORKINGCHECK ALL SYSTEMALL CABLE IS LOOSE NOOR BAD INTPANEL STANDBY LED SHOW WORKING NORE-INSERT AND FIXTHE CABLEYESOR NOTCHECK BACK POWER PCB F901 BAD CAUSEYESCHANGE F

17、901BADDAMAGECHECK CN900 12V+5V RIGHTYESCHECK REPAIRCONTROL PCB IC206YESSTANDBY CIRCUITREPAIR BETWEENNORB906 TO CN 900 ANDCN201 CIRCUITCN201 PIN13(PVCC) CHECK IC902 PIN3=+5VCHECK IC904 PIN 3=3.3VCHECK REPAIR NOCHECKALL VOLTAGE CIRCUITCORRECT REPAIR MAIN PCBBETWEEN IC100 TOIC107/IC108 CIRCUITSHECK IC1

18、00 pin2 NOpin3(osc frequency 27MHz)pin51(121MHz)3.3V AND 5VGIVE NOWORKSWITCH POWERSUPPLY CIRCUIT(see B)Brb201 and rb202CABLELOOSE OR BAD INTCHECK CONTROL PCBRB201 pin5=+5VNORE-INSERT AND FIXTHE CABLEYESPCB POWER SUPPLYNOCIRCUITYESCHECK IC100IC400NOCHECK +5V POWERCHECK TEST CN201pin4/DATASCHECK VFD C

19、ONTROL PCB SECTION BAD CAUSE CHECK TEST CN201pin6=-24v pin7,8=AC2Vpin5=5Vpin2/CE pin3/CLKYESSUPPLY CIRCUITVFD DISPLAYNO SHOWAND KEY FUNCTIONYESYESDAMAGENO2-3REPAIR INSTRUCTIONS2-3CDVDNO VIDEOCHECK JK301 OK DVDNO READINGOR BADCHECK CN805 CN806TO DVD LOADER CABLELOOSEOR BAD INTCHECK IC900 pin3=8VIC905

20、 pin3=3.3VYESCHECK SPIN-MSLED-M IS RUNYESNOIC903 IC901 pin1=5VCHECK pickup if light upCant OPEN CLES NOCHECK Q808 Q807OKcheck IC100 OF IC804TO CN805SHECK CN805 PIN1NORF OUTQ803,Q804 TO CN805DVD NO SOUNDCHECK L300L304CHECK IC100 AND ITS AROUND PARTCHAGE JK301CHECKBADZD300ZD309BADOK0KCN300RE-INSERT AN

21、D FIXTHE CABLENOCHECK NOIC900/IC903/IC901IC905CHECK CN802 TOCHECK CN802 pin1,2YESCHECK OPEN-MYESDVD LOADER CABLELOOSEOR BAD INTCHECK IC801 pin1,pin7BADNORE-INSERT AND FIXTHE CABLEis HI or LONOis HI or LOCHECK IC801/pin4,5The disc changer cant runCHECK CN803CHECK CN803 pin1,2YESCHECK OPEN-MYESDVD LOA

22、DER CABLELOOSEOR BAD INTis HI or LOCHECK IC800 pin1,pin7BADNORE-INSERT AND FIXTHE CABLECHECK IC800 pin4,5NOis HI or LO is HI or LOYESCHECK IC800YESCHECK CN803YESCHECKYESCN802Cant LOAD UP DOWINCHECK CN804 TOCHECK CN804 pin1,2YESloda up down-MYESDVD LOADER CABLELOOSEOR BAD INTCHECK IC802 pin1,pin7BADN

23、ORE-INSERT AND FIXTHE CABLEis HI or LONOis HI or LOCHECK IC802/pin4,5CHECKYESCN802YESYESCHECK IC803 pin20,21 (11.0582MHz) CIRCUITYESCHECK IC805OKCHECK LOADEROKCHECK LOADEROKCIRCUITCIRCUITCN805pin2,5,6,7,9,10,11,12CIRCUITCHECK LOADERREPAIR INSTRUCTIONS2-4 2-4DALL VOITAGENO OUTPUTCHECK F901BAD CAUSE D

24、AMAGEYESNOCheck RL901working or notCheck T903 pin3approx if +28v VoltageCHECK D905 ANDCheck BR901no+30V VoltageNo Outputand RT901its conjoint partECheck IC402,IC502,IC503Pin4,7,12,15 Voltage=30VCheck IC500 their Voltage correct is 3.3V 2.5VYESCheck RL901 andits conn circutiYESCheck T903,IC903,IC904,

25、SN901,D902.D906,D907,NOD905and their conjoint partYESRepair Between IC1000 IC402 IC502 IC503 to Check IC100 and its Check Between IC500 to Check CN500 and its conjoint partIC100 CircuitNOconjoint partAudio OutputNo SoundYESPOWER SUPPLYNO WORKING+6V VoltageNo Output+12V VoltageNo Output-24V VoltageNo

26、 OutputCHECK D906 ANDits conjoint partCHECK D907 ANDits conjoint partCHECK D908 ANDits conjoint partyesCheck repair in 3.3V 2.5V net its conjoint partNONOand IC403 circuitRepair Between IC503L/R channelNo Soundto JK500 and IC500RS/center channelNo SoundLS/SUB channelNo SoundcircuitRepair Between IC502to JK500 and IC500circuitRepair Between IC402to JK500 and IC500circuitFCheck JK400loose bad INTCheck IC 401 pin16=+7Vpin7=-7V offirm correctNOAux/Tv in No SoundCheck +7v and -7vgive circuitNOCheck Repair BetweenIC401 to JK300 and IC403Check Repair IC403 toIC100 tataNOYESCircuit