Philips-MCD-288-E-Service-Manual电路原理图.pdf

Location 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 Check Chart . 2-2Disassembly Diagram . 3-1Block Diagram . 4-1Wiring Diagram. 4-2Display(VFD) Board . 5Tuner Board . 6USB Board . 7Power Board(In SW box). 8Decode Board . 9Explode View . 10Service Partlist . 11Factory Partlist . 12TABLE OF CONTENTS2008Published by DB 0946 Service Audio Printed in The Netherlands Subject to modification© 314178532350LOCATION OF PCBS1-1HEADPHONE BOARDDISPLAY BOARDDECODE BOARDVERSION VARIATIONS:Type /Versions:Features &Board in used:MCD288E/12Service policyDISPLAY BOARDTUNER BOARDHEADPHONE BOARDUSB BOARDPOWER BOARDDECODE BOARD* TIPS : C - Component Lever Repair.M - Module Lever RepairX - Not need repair(only for reference)CMMMXMAmplifierRated output power .2 x 20W + 50W RMSFrequency response (L/R). 20 - 20000Hz(Subwoofer) . 50 - 180HzSignal to noise ratio . > 65dBAux input . 1V RMS 20kohmDiscLaser type . SemiconductorDisc diameter . 12cm/8cmVideo decoding .MPEG-1 / MPEG-2 / DivxVideo DAC . 12BitsSignal system . PAL / NTSCVideo format . 4:3 / 16:9Video S/N . > 48dBAudio DAC . 24Bits / 96kHzTotal harmonic distortion. 65dBATunerFM tuning range . 87.5 - 108MHzTuning grid . 50KHzSensitivity Mono, 26dB S/N ratio. 50uV Stereo, 46dB S/N ratio . 100uVSelectivity . > 28dBImage rejection . > 25dBTotal harmonic distortion. 55dBASpeakersSpeaker impedance (L/R) . 4 ohm(Subwoofer) . 4 ohmSpeaker driver (L/R) . 3”(Subwoofer) . 5”Frequency response . 50 - 16000 HzGeneral informationTotal output power .2 x 25W + 50W RMSACpower . 220V - 230V, 50Hz / 60HzOperation power consumption . 35WStandby power consumption . < 4WEco standby power consumption . 1WComposite video output .1.0Vp-p, 75ohmHeadphone output . 2 X 15mW, 32ohmUSB direct . Version 2.0HDMI . Version 1.1Dimensions (W x H x D) Main unit . 472 x 362 x 224mm Main speaker . 140 x 220 x 33mm (each) Subwoofer . 170 x 197 x 302mm With packing . 10kg Main unit .1.35kg Main speaker . 0.37kg (each) Subwoofer . 3.12kgSpecifications subject to change withoutprior notice1-2SPESIFICATIONWeight1-3LF 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 PLAYABILITY1-2-12-1SOFTWARE VERSION CHECK & UPGRADE2-2MALFUCTION CHECK CHART2-23-1 3-1DISASSEMBLY DIAGRAM