Philips-MCM-710-Service-Manual电路原理图.pdf

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1、Published by DB 0801 Service Audio Printed in The Netherlands Subject to modification 3141 785 32341Location of PCBS . 1-1Specifications . 1-2Measurement Setup . 1-3Service Aids, Safety Instruction, etc. . 1-4Instructions On CD Playability . 1-5 to 1-6Software Version Check & Upgrade . 2-1Malfuction

2、 Check Chart . 2-2Disassembly Diagram . 3-1Block Diagram . 4-1Wiring Diagram. 4-2VFD Board . 5Tuner Board . 6Lamp And Headphone Board . 7Volume And USB And USB Lamp Board . 8Power Board . 9Decode Board . 10Explode View . 11Service Partlist . 12Factory Partlist . 13TABLE OF CONTENTSVersion 1.1LOCATIO

3、N OF PC BOARDSVERSION VARIATIONS:Type /Versions:Features &Board in used:MCM710/121-1POWER BOARDVOLUME BOARDDISPLAY BOARDHEADPHONE BOARDDECODER BOARDService policyVFD BOARDTUNER BOARDLAMP BOARDHEADPHONE BOARDVOLUME BOARDUSB BOARDUSB LAMP BOARDPOWER BOARDDECODE BOARD* TIPS : C - Component Lever Repair

4、.M - Module Lever RepairX - Not usedCMMMMMMMMAMPLIFIERRated Output Power . 2 x 45 W RMSSignal-to-noise ratio . 65 dBAFrequency response . 20 Hz 20 KHz, 3 dBAux Input. 1V RMS 20kohmDISCLaserType . SemiconductorDisc Diameter. 12cm/8cmSupport Disc . CD-DA,CD-R,CD-RW,MP3-CD,WMA-CDAudio DAC .24Bits / 44.

5、1kHzTotal Harmonic Distortion . 65dBATUNERFMTuning Range . 87.5 108 MHzTuning grid . 50KHzSensitivity Mono, 26dB S/N Ratio . 5uV Stereo, 46dB S/N Ratio . 100uVSelectivity . 28dBImage Rejection .25dBTotal Harmonic Distortion . 55dBASPEAKERSSpeaker Impedance . 4ohmSpeaker Driver, base .5“Speaker Drive

6、r, tweeter . 0.2“Frequency Response . 60 - 20 KHzGENERAL INFORMATIONTotal Output power . 2 x 50 W RMSAC Power . 220-230V / 50Hz/60HzOperation Power Consumption . 52WStandby Power Consumption .7WEco Standby Power Consumption . 1WHeadphone Output . 2X15mW 32ohmUSB Direct . Version 1.1Dimensions Main u

7、nit (w x h x d) . 248x110x307mm Speaker box (w x h x d). 170x270x220mmWeight With Packing . 10 KG Main Unit .2.3 KG Speaker box . 2.6 KGSpecifications and external appearance aresubject to change without notice.1-2SPESIFICATION1-3LF Generator e.g. PM5110RecorderUse Universal Test Cassette CrO2 SBC41

8、9 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. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BLRDUTCDUse Audio Signal Disc(re

9、places 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 89001Tuner AM (MW,LW)To avoid atmospheric interference all AM-measurements have to be carried out in a Faradays cage.

10、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. PM2534DUTRF Generator e.g. PM5326S/N and distortion metere.g. Sound Technology ST1700BUse a bandpass filter to elimina

11、te 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 electrostatic discharges (ESD).Careless handling during repair can reduce lifedrastically.When repairing, make sure

12、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 the set be restored to its originalcondition and that parts which are identical with those spe

13、cified,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“check playabilityNYplayabilityok ?check playabilitycheck playabilityreturn setCustomer complaint“CD related problem“fa

14、st“ lens cleaning123For flap loaders (= access to CD drive possible)cleaning method 4 is recommendedINSTRUCTIONS ON CD PLAYABILITY1-Exchange CDM1 - 4 For description - see following pages1PLAYABILITY CHECKFor sets which are compatible with CD-RW discsuse CD-RW Printed Audio Disc.7104 099 96611TR 3 (

15、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 (search) within a reasonable timeFor all other sets use CD-DA SBC 444A.4822 397 30245TR 14 (600 Black

16、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 01:25 jump forward/backward (search) within a reasonable time2CUSTOMER INFORMATIONIt is proposed to

17、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 case problems remain, the customeris requested to contact the workshop directly. The lens cleaning

18、 (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 LENS CLEANINGBecause the material of the lens is synthetic and coatedwith a special anti-reflectivity layer, cleani

19、ng 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 guarantee its full function.Clean the lens gently (dont press too hard) with a soft andclean cotton bud moistened with the

20、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.INSTRUCTIONS ON CD PLAYABILITY1-2-12-1SOFTWARE VERSION CHECK & UPGRADE2-2MALFUCTION CHECK CHART2-23-1 3-1DISASSEMBLY DIAGRAM