Philips-MCD-715-Service-Manual电路原理图.pdf

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1、Version 1.1MCD7153141 785 32111DVD Micro theatreall versionsPublished by LX 0736 Service Audio Subject to modificationCopyright 2007 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in a retrievalsystem or transmit

2、ted, in any form or by any means, electronic, mechanical, photocopying,or otherwise without the prior permission of Philips.Service Aids .1-1Info. about lead-free soldering.1-1Service Instruction .1-1CD Playability Check .2-1.2-3Disassembly digram .3-1.3-3Software version check and upgrading .4-1Blo

3、ck diagram.5-1Wiring diagram .6-1Tuner Boardcircuit diagram .7-1layout diagram.7-2VFD Board circuit diagram .8-1layout diagram.8-2CPU Boardcircuit diagram. .9-1layout diagram.9-2.9-3AMP Boardcircuit diagram .10-1layout diagram .10-2.10-3MPEG Boardcircuit diagram. .11-1.11-6layout diagram.11-7Power B

4、oardcircuit diagram. .12-1.12-2layout diagram.12-3Exploded view diagram .13-1Service partslist .14-1Commercial partslistTABLE OF CONTENTS1-1Service Tools:Universal Torx driver holder .4822 395 91019Torx bit T10 150mm .4822 395 50456Torx driver set T6-T20 .4822 395 50145Torx driver T10 extended .4822

5、 395 50423Compact Disc:SBC426/426A Test disc 5 + 5A .4822 397 30096SBC442 Audio Burn-in test disc 1kHz .4822 397 30155SBC429 Audio Signals disc .4822 397 30184Dolby Pro-logic Test Disc .4822 395 10216SERVICE AIDSGB WARNINGAll ICs and many other semi-conductors aresusceptible to electrostatic dischar

6、ges (ESD).Careless handling during repair can reduce lifedrastically.When repairing, make sure that you areconnected with the same potential as the massof the set via a wrist wrap with resistance.Keep components and tools also at thispotential.ESDCLASS 1LASER PRODUCTGBSafety regulations require that

7、 the set be restored to its originalcondition and that parts which are identical with those specified,be usedSafety components are marked by the symbol !.Lead freeSet remains closed!Standard repair procedureNYPlay a CD for at least 10 minutesYplayabilityok ?Nplayabilityok ?add Info for customer“SET

8、OK“playabilityok ?YNcheck playabilityNYplayabilityok ?check playabilitycheck playabilityEYE-Patternok ?NYcheck “EYE-Pattern“replace CD DriveLaser currentok ?NYcheck Laser currentCD Drive offsetsok ?NYcheck CD Drive offsetsclean the lenscheck playabilityreturn setCustomer complaint“CD related problem

9、“return setreturn setreplace CD Drivereturn setreplace CD Drivereturn setreplace Signal Processorreturn set“fast“ lens cleaning1234567For flap loaders (= access to CD drive possible) cleaning method 4 is recommended1 - 7 For description - see following pagesCD PLAYABILITY CHECK2 -1 1PLAYABILITY CHEC

10、KFor sets which are compatible with CD-RW discsuse CD-RW Printed Audio Disc.7104 099 96611TR 3 (Fingerprint)TR 8 (600 Black dot) maximum at 01:00 playback of these two tracks without audible disturbanceplaying time for: Fingerprint t10secondsBlack dot from 00:50 to 01:10 jump forward/backward (searc

11、h) within a reasonable timeFor all other sets use CD-DA SBC 444A.4822 397 30245TR 14 (600 Black dot) maximum at 01:15TR 19 (Fingerprint)TR 10 (1000 wedge) playback of all these tracks without audible disturbanceplaying time for: 1000 wedge t10secondsFingerprint t10secondsBlack dot from 01:05 to 01:2

12、5 jump forward/backward (search) within a reasonable time2CUSTOMER INFORMATIONIt is proposed to add an addendum sheet to the set whichinforms the customer that the set has been checkedcarefully - but no fault was found.The problem was obviously caused by a scratched, dirty orcopy-protected CD. In ca

13、se problems remain, the customeris requested to contact the workshop directly. The lens cleaning (method 3) should be mentioned in theaddendum sheet.The final wording in national language as well as the printingis under responsibility of the Regional Service Organizations.3FAST LENS CLEANING (dry br

14、ush)Use lens cleaning CDSBC AC300.9082 100 00043Insert the lens cleaning CD, press PLAY and follow thevoice guides instructions on the CD.4LIQUID LENS CLEANINGBecause the material of the lens is synthetic and coatedwith a special anti-reflectivity layer, cleaning must be donewith a non-aggressive cl

15、eaning fluid. It is advised to use“Cleaning Solvent B4-No2”, available with codenumber4822 389 10026.The actuator is a very precise mechanical component andmay not be damaged in order to guarantee its full function.Clean the lens gently (dont press too hard) with a soft andclean cotton bud moistened

16、 with the special lens cleaner.The direction of cleaning must be in the way as indicated inthe picture below.Before touching the lens it is advised to clean thesurface of the lens by blowing clean air over it.This to avoid that little particles make scratches onthe lens.CD PLAYABILITY CHECK2-25EYE-P

17、ATTERN SIGNAL JITTER MEASUREMENTMeasure the signal on the input of the Signal processorusing an analog oscilloscope. Please find the exactmeasuring point in your Service Manual.See below examples of the signal. Amplitude should read atleast 700mVpp using SBC444A.goodbadIf the oscilloscope shows a si

18、gnal like the bad one, and/orthe amplitude decreases within 1 minute - the CD drive hasto be replaced.6CD DRIVE LASER CURRENT MEASUREMENTThe laser current can be measured as a voltage drop on aresistor. The resistor is marked in every Service Manual.The value depends on the type of CD drive.typical

19、value most probably defectVAMxxxx : 150-230mV t350mVMCDxx : 170-230mV t300mVDA1x : 210-250mV t350mVDA2x : 175-200mV t250mVUse SBC444A (CD-DA) for measurement.7CD DRIVE OFFSET MEASUREMENTThe photodiodes of the CD-drive may have an offset. Theseoffsets have to be compensated by the signal processor.Hi

20、gh offsets can lead to poor playability of some CDs(skipping tracks).To measure the offset values, start the Service TestProgram - section “Focus Test” without a CD.The offsets can be measured with a DC Millivoltmeterdirectly on the connector (see drawing below). Pinnumbering varies from drive to dr

21、ive.The values from diode A-D should read 010mV.Diodes E and F are less critical.If one of the offsets is higher than 10mV the CD drive hasto be replaced. Otherwise replace the Signal Processor.Sanyo DA12T3CD DriveAAFCBECDEVCCBVREFFD9101112131415161800+5V_HFVrefCD10ADEBCFGND 8EDABCFLaser power contr

22、ol100n2878470n287638211R1K3823288033p+5VBC807-407879381747R38204R747R38191n28792877 47u1847811-ALM358D3210K382247R38182841 100n47n2869+5V_HFLASER DIODEU 250mV-Laser damaged !4,6V3V3,3V3,9V2V0,17V0,17VSanyoDA12T3HF-AmplifierD3D2D1Drive detection680R390539033K3BC847B787747n28181K5390257421636489101147

23、0R3893+3.3V2K23908 10K3923BC847B7878BC847B78764n728133896100R220u28852881560p47n2887560R39012883470n28174u73n328143898220R389527K470n2884+3.3V3909820R3907100R392033K3897288282p3K339042K738993906470R+5V_HFHFINVrefCD10100p2815281622nLDONto 3826,3827VREF GEVDDA1VRINVSSA1ISLICELDOND1D2D3D4HFINHFREFIREFC

24、D_DA: 0V / CD_RW: 3V6 (A-D)800mVppTB = 0.5Ps/divEYE-PATTERN1,8V1,2V2,4V2,6V0,65VCD PLAYABILITY CHECK2-33 -1A.RemovebottomcoverC.Loosenscrewsh15FM(4PCS),and then remove the fan A1. Loosen screws h3$ 4PCS)B. Loosen screws h10FA(10PCS),andD.Cutoff4PCSwireticthenremovetopcoverandrearshuckA1 BCDDisassemb

25、ly diagramPage:56E. Loosen screws h6PT(3PCS), remove CPU board HLoosen screws h6PT(4PCS), remove decode card F. Loosen screws h8BA(1PC),removeAMPboardG. Loosen screws h10PWA(4PCS), remove mechanismcoreI. Loosen screws h10BA(2PCS), remove bezel panel HIEGFDisassembly diagramPage:573 -2J. Loosen screw

26、s 2.h8BA(8PCS),removeVFDboardK. Loosen screws 2.h8BA(3PCS),removevolumecardL.Loosenscrews2.h8BA(4PCS), removeUSB, earphone socket JKLDisassembly diagramPage:583 -34 - 14 - 1SOFTWARE VERSION CHECK AND UPGRADINGSET BLOCK DIAGRAM5 - 15 - 1TDA8947J TDA8947JPT2322922824C02PT2323TUNER BLOCKIC:TEA5760AUXRA

27、UXRINAUXLAUXLINREDROUTVIDEOV-OUTS-VIDEOS-VOUTCOAXIALOPTICALGREENGROUTBLUEBOUTMEPG2BLOCKMECHANISMDVDSTBY&MUTECONTROLVFDPT16311RE M1GND2Vcc3REM-SENSOR+5V+5V+5V+22V GNDDVD+12VACPOWERBLOCKSTANDBY+5VDVDON/OFFTUNERPOWERTUNERINDVDMRDVDMLD-FLD-FRSLSRCE NSWSWCENSLSR FL FRFL FRSWCENSLSRCPUSDA SCLFR FL SL SRCENSWKEYCONTROLFR SRCENSW SLFLSTANDBYMUTESUR-MUTEMUTESUR-MUTEFMAUXLINAUXRINTL072+12V -12V+12V-1 2 VSW