Philips-MCD-750-Service-Manual电路原理图.pdf
DVD Micro System MCD750/93TABLE OF CONTENTS3141 785 32941DB 08222008 Location of PC Boards . 1-1Specification . 1-2Measurement Setup . 1-3Service Aids . 1-4Instruction On CD Playability .1-5 to 1-6Software Version Check & Upgrade . 2-1Malfuction Check Chart . 2-2Decoder Board . 8Disassembly Diagram .3-1Block Diagram . 4-1Wiring Diagram. 4-2VFD Display Board .5Circuit diagram . 5-1Layout diagram . 5-2TUNER Board .7USB & AUX Board .6-1Circuit diagram . 7-1Layout diagram . 7-2Circuit diagram . 8-1 to 8-6Layout diagram .8-7 to 8-8Explode View .9-1 Service Partlist .10-1AMPLIFIERRated Output Power . .2 x 25W RMS Signal-to-noise ratio . 65 dBAFrequency response . 50Hz - 3 dB+/-2 20KHzAux Input.0.5V RMS 47kohmDISCLaserType . SemiconductorDisc Diameter. 12cm/8cmSupport Disc .DVD,DVD-R,DVD-RW,DVD+RW,CD-DA,MP3,CD-RWAudio DAC .24Bits / 44.1kHz Total Harmonic Distortion . 28dBImage Rejection .>25dBTotal Harmonic Distortion . <3%Signal to Noise Ration .!GBASPEAKERSSpeaker Impedance . 8ohmSpeaker Driver, base .4“Speaker Driver, tweeter .BUZZER Frequency Response .50Hz -3dB+/-2 20KHz GENERAL INFORMATIONTotal Output power .W RMS AC Power . 220-2309+Operation Power Consumption . 25WStandby Power Consumption .<4WEco Standby Power Consumption .<1WHeadphone Output . 2X15mW 32ohmUSB Direct . Version 1.1Dimensions Main unit (w x h x d)PP Speaker box (w x h x d).115x152x204mmWeight With Packing .7.5 KG Main Unit .1.2KG Speaker box . . 2.7KGNet Weight. . .*Specifications and external appearance aresubject 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. 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 89001Tuner AM (MW,LW)To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday´s 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. PM2534DUTRF 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 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 regulations 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“check 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 pages1PLAYABILITY CHECKFor sets which are compatible with CD-RW discsuse CD-RW Printed Audio Disc.7104 099 96611TR 3 (Fingerprint)TR 8 (600µ 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 (600µ Black dot) maximum at 01:15TR 19 (Fingerprint)TR 10 (1000µ wedge) playback of all these tracks without audible disturbanceplaying time for: 1000µ wedge t10secondsFingerprint t10secondsBlack dot 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-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 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 guarantee 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 clean air over it.This to avoid that little particles make scratches onthe lens.INSTRUCTIONS ON CD PLAYABILITY1-2-1 Software Version Check & UpgradeMCD750 VxxUpgrade softwareSoftware check3.Press SYSTEM on the remote open menu, press Left or Right to select “PreferencePage”, TV screen showing as below:Press Up or Down to select “Default” on remote, Press OK to exit reset.Software upgrade finish.Input password “811502” on remote, TV screen showing as below:Upgrade File detected-Preference Page-TV type PALAudio CHI EnglishSubtitle CHI FrenchDisc menu CHI SpanishParental ChineseJapaneseDefault KoreanRussianTjaiUpgrade?Press PLAY to startUpgradingCPU version check1.Downloading the software form Philips support website1.Keep press PLAY/PAUSE and STOP buttons,plug into the power cord at one time,TV showing as below:2.Put in the Software CD Disc or USB,when it is loading,the TV screen showing as below:Waiting half to one minute,till the TV screen showing disappear.Turnoff electrical source and reopen.http:/www.philips.com/supportVer : Date TimeRegion codeMCD750 / xxxxmm dd yyyyhh : mm : ssx2-2 Malfunction follow check chart e z i r p , f f o r e w o P . r o o d D V D n e p o , n o r e w o P . A n e h t d n a , t e e f r e b b u r f o k c o l f o e c a l p o w t . r o o d D V D e v o m e r n i d e t a c o l h c i h w s w e r c s n e s o o L . B 0 1 - T X R O T r e v o c p o t f o t f e l e h t . ) S C P 2 ( I N 0 . 6 X 0 . 3 T T T S n i d e t a c o l h c i h w s w e r c s n e s o o L . C 0 1 - T X R O T r e v o c p o t f o t h g i r e h t . ) S C P 2 ( I N 0 . 6 X 0 . 3 T T T S k c a b e h t n i d e t a c o l h c i h w s w e r c s n e s o o L . D I N 0 . 6 X 0 . 3 B T T S 0 1 - T X R O T r e v o c p o t f o . r e v o c p o t e v o m e r d n a , ) S C P 2 ( ) S C P 4 ( A W P 0 1 X 3 s w e r c s n e s o o L . E . r e d a o l D V D e v o m e r o t A B C . ) S C P 2 ( T T M B 5 X 3 t e n i b a c f o s w e r c s n e s o o L . F e d i s e h t n i d e t a c o l h c i h w s w e r c s n e s o o L . G . ) S C P 2 ( T T M F 5 X 3 t e n i b a c f o e h t n i d e t a c o l h c i h w s w e r c s n e s o o L . H 0 . 6 X 0 . 3 0 1 - T P T T S X R O T l e n a p r a e r . ) S C P 2 ( 3 B A e h t n i d e t a c o l h c i h w l a n i m r e t f o s w e r c s n e s o o L . I 0 . 0 1 X 0 . 3 P 5 . 1 0 1 - T X R O T S P I L I H P l e n a p r a e r . ) S C P 6 ( 3 B A P T T S X R O T l a n i m r e t r e n u t f o w e r c s n e s o o L . ) S C P 1 ( 3 B A 0 . 6 X 0 . 3 0 1 - T o t ) S C P 4 ( M B 5 X 3 s w e r c s n e s o o L . J . d r a c r e d o c e d e v o m e r ) S C P 6 ( A P 8 X 6 . 2 s w e r c s n e s o o L . K . d r a o b y a l p s i d e v o m e r o t . ) S C P 1 ( e m u l o v f o w e r c s e h t e v o m e R . L D E F G H I J K L Disassembly Diagram 3-1 3-1
