Philips-MCM-772-Service-Manual电路原理图.pdf

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1、277MCM metsyS orciM DVDTABLE OF CONTENTS3141 785 33060DB 08302008Location of PC Boards . 1-1Specification . 1-2Measurement Setup . 1-3Service Aids . 1-4Instruction On CD Playability .1-5.1-6Software Version Check & Upgrade . 2-1Malfuction Check Chart . 2-2Power Board . 9Decoder Board .10Disassembly

2、Diagram .3-1.3-2Block Diagram . 4-1Wiring Diagram. 4-2Volume Board .5-1Display Board .6Circuit diagram . 6-1Layout diagram . 6-2TUNER Board .8M-boy,USB&Headphone Board .7Circuit diagram . 8-1Layout diagram . 8-2Circuit diagram .10-1.10-4Layout diagram .10-5.10-6Circuit diagram .9-1.9-2Layout diagram

3、 . 9-3Explode View .11-1.11-2Service Partlist .12-1Factory Partlist .13-1.13-6Location of PC Boards1-1DECODERBOARDUSBBOARDM-boy BOARDVOLUME BOARDTUNERBOARDVFD DISPLAY BOARDFANPOWER BOARD110/220 CHANGING BOARD(for 98version)VERSION VARIATIONS:Type /Versions:FeaturesBoard in used:MCM772Service policyD

4、ISPLAY BOARDUSB BOARDM-boy BOARDTUNER BOARDHEADPHONE BOARDDECODER BOARDVOLUME BOARDPOWER BOARD* TIPS : C - Component Lever Repair.M - Module Lever Repair- Used/55/55/58/58/61/61/79/79/93/93/94/94/96/96/98/98/37/37/12/12/05/05Feature diffrenceRDSTDSVOLTAGE SELECTORECO STANDBY - DARKCMMMMMMMType /Vers

5、ions:MCM772AMPLIFIERRated Output Power .45Wx2 RMSSignal-to-noise ratio . 65 dBAFrequency response .50Hz - 3 dB+/-3 20KHz Aux Input.0.5V RMS 47kohmDISCLaserType . SemiconductorDisc Diameter. 12cm/8cmSupport Disc .CD-DA,MP3,CD-RW,CD-RAudio DAC .24Bits / 44.1kHzTotal Harmonic Distortion . 26dBImage Rej

6、ection .26dBTotal Harmonic Distortion . 65dBASPEAKERSSpeaker Impedance . 4ohmSpeaker Driver, base .4.5“Speaker Driver, tweeter . 3“Frequency Response .50Hz -3dB+/-3 20KHzGENERAL INFORMATIONTotal Output power . 45Wx2 RMSAC Power .220-230V / 50HzOperation Power Consumption . 52WStandby Power Consumpti

7、on .4WEco Standby Power Consumption .1WHeadphone Output . 2X15mW 32ohmUSB Direct . Version 1.1Dimensions Main unit (w x h x d) . 248x280x105mm Speaker box (w x h x d). 140x210x250mmWeight With Packing . 9.7 KG Main Unit .2.8 KG Speaker box . 4.9 KG/SETSpecifications and external appearance aresubjec

8、t to change without notice.1-2Specification1-3LF Generator e.g. PM5110RecorderUse Universal Test Cassette CrO2 SBC419 4822 397 30069LEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metee.g. Sound Technology ST170LRDUTor Universal Test Cassette Fe SBC420 4822 397 30071LEVEL METERe.g.

9、 Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BLRDUTCDUse Audio Signal Disc(replaces test disc 3)SBC429 4822 397 30184Bandpass250Hz-15kHze.g. 7122 707 48001LF Voltmetere.g. PM2534DUTS/N and distortion metere.g. Sound Technology ST1700BFrame aeriale.g. 7122 707 8

10、9001Tuner AM (MW,LW)To avoid atmospheric interference all AM-measurements have to be carried out in a Faradays cage.Use a bandpass filter (or at least a high pass filter with 250Hz) to eliminate hum (50Hz, 100Hz).RF Generator e.g. PM5326Ri=50:Bandpass250Hz-15kHze.g. 7122 707 48001LF Voltmetere.g. PM

11、2534DUTRF Generator e.g. PM5326S/N and distortion metere.g. Sound Technology ST1700BUse a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).Ri=50:Tuner FMMEASUREMENT SETUP1-4SERVICE AIDSGB WARNINGAll ICs and many other semi-conductors aresusceptible to

12、electrostatic discharges (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 reg

13、ulations require that 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!NYPlay a CD for at least 10 minutesYplayabilityok ?Nplayabilityok ?add Info for customer“SET OK“ch

14、eck playabilityNYplayabilityok ?check playabilitycheck playabilityreturn setCustomer complaint“CD related problem“fast“ lens cleaning123For flap loaders (= access to CD drive possible)cleaning method 4 is recommendedINSTRUCTIONS ON CD PLAYABILITY1-Exchange CDM1 - 4 For description - see following pa

15、ges1PLAYABILITY CHECKFor 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 for

16、ward/backward (search) 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 do

17、t from 01:05 to 01:25 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

18、-protected CD. In case 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.4LIQUID

19、 LENS CLEANINGBecause the material of the lens is synthetic and coatedwith a special anti-reflectivity layer, cleaning must be donewith a non-aggressive cleaning fluid. It is advised to use“Cleaning Solvent The actuator is a very precise mechanical component andmay not be damaged in order to guarant

20、ee its full function.Clean the lens gently (dont press too hard) with a soft andclean cotton bud moistened 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 cle

21、an air over it.This to avoid that little particles make scratches onthe lens.INSTRUCTIONS ON CD PLAYABILITY1-2-1 Software Version Check & UpgradeUpgrade softwareSoftware checkPress the “display” button quartic continuously on remote control,display showing as below:1.Downloading the software form Ph

22、ilips support website2.Put in the Software CD Disc or USB,when it is loadingWaiting a minute,till hear a long ding voice. Softwareupgrade finish.http:/ dyyyy0DOIXQFWLRQIROORZFKHFNFKDUWDisassembly Diagram-DVD Part3-1 3-1A.roodDVDnepo,rewopehtnonruTfoecalpowtezirp,ffonrutnehtdnA.roodDVDevomer,teefrebb

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