Philips-MCD-268-Service-Manual电路原理图.pdf

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1、DVD Micro System MCD268 TABLE OF CONTENTS3141 785 32520DB 08112008Location 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 Diag

2、ram . 3-1Block Diagram . 4-1Wiring Diagram. 4-2VFD Board . 5Circuit diagram . 5-1Layout diagram. 5-2Tuner Board . 6Circuit diagram . 6-1Layout diagram. 6-2Headphone Board . 7Power Board . 8Circuit diagram . 8-1.8-2Layout diagram. 8-3Decode Board . 9Circuit diagram . 9-1.9-6Layout diagram. 9-7.9-8Exp

3、lode View . 10Service Partlist . 11Factory Partlist . 12Location of PCBS1-1HEADPHONE BOARD DISPLAY BOARD DECODE BOARD TUNER BOARD VERSION VARIATIONS :Type /Versions: Features Board in used: MCD268Service policy DISPLAY BOARD TUNER BOARD HEADPHONE BOARD POWER BOARD DECODE BOARD * TIPS : C - Component

4、 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 diffrence RDSVOLTAGE SELECTOR ECO STANDBY - DARK CC CMMMMMMMMMMMMType /Versions: MCD268AMPLIFIERRated Output Power .2 x 45W RMS Signal-to-noise ratio . 65 dBA Frequency response . 10

5、0Hz 15KHz, 3 dB Aux Input.0.5V RMS 47kohm DISCLaserType . Semiconductor Disc Diameter. 12cm/8cm Support Disc . .DVD,DivX,CD-DA,CD-R,CD-RW,MP3-CD,WMA-CD Audio DAC .24Bits / 44.1kHz Total Harmonic Distortion . 65dBA TUNER FMTuning Range . 87.5 108 MHz Tuning grid .100K/ 50KHz Sensitivity Mono, 26dB S/

6、N Ratio . 5uV Stereo, 46dB S/N Ratio . 100uV Selectivity . 26dB Image Rejection .26dB Total Harmonic Distortion . 65dBA SPEAKERSSpeaker Impedance . 4ohm Speaker Driver, base .4.5“ Speaker Driver, tweeter . 3“ Frequency Response . 60 - 20 KHz GENERAL INFORMATION Total Output power . 9 0 W RMS AC Powe

7、rOperation Power Consumption . 52WStandby Power Consumption .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). 206x170x270mmWeight With Packing. 10 KG Main Unit .1.53KGSpeaker box . 0.38

8、KGSubwoofer. . . . 2.97KGSpecifications and external appearance aresubject to change without notice.1-2Specifications. 220V / 50Hz(/93).110V-127V/60Hz. 220-240V / 50Hz(/98/55)1-3LF Generator e.g. PM5110RecorderUse Universal Test Cassette CrO2 SBC419 4822 397 30069LEVEL METERe.g. Sennheiser UPM550wit

9、h 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 30184Bandpass250H

10、z-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.Use a bandpass filter (or at least a high pass filte

11、r 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 pilott

12、one (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

13、 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 sy

14、mbol!.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

15、 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 (600 Black dot) maximum at 01:00 pl

16、ayback 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 dot) maximum at 01:15TR 19 (Fingerprint)TR 10 (1000

17、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 add an addendum sheet to the set whichinforms the cu

18、stomer 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

19、.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.

20、 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

21、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 & upgrade Upgrade softwareMCD2

22、68 Vxx Upgrade software Upgrade software 1.Press SYSTEM key to set to operation setup page, 1.Installing the upgrade disk, DVD player can be upgraded automatically, 2.Pressing the SYSTEM can be set to the general setting page, which display Make the playback setting after the DVD motorized door open

23、ing automatically 2,Pressing the key of up、 down,left、 right to original 3.Pressing the key of left、 right,up、 right to original setting page, which display 4.Pressing the key of left、 right,up、 right to move to the “Playback” and them 3.Enter the password “811502”, TV can display the model setup pa

24、ge software date and area number display is as below which display as bellow: and showing OK to upgrade. as below: as below: pressing OK to confirm which means OK to upgrade the “Playback”. -Common Setting Page- Upgrade file detected -General setup page- -Preference page- TV type Audio Subtitle Disc

25、 menu Parental Default -Preference page- TV type Audio Subtitle Disc menu Parental Reset TV Display OSD language Screen saver Upgrade? Press PLAY to start Upgrading TV Mode Display Language Screen Protection -Original Setting Page- TV Set standard Sound Subtitle Ver : Date Time Region code Aptitude

26、remove Upgrade? Start by pressing PLAY Upgrading File copying MCD268 / xxxx mm dd yyyy hh : mm : ss x Language Chosen by Disk Age Controlling Factory Setting MPEG version check CPU version check 1.Downloading the firmware for Philips support website 1.Keep PLAY/PAUSE and STOP buttons(on the set)while plug in the power cord, TV screen show 2.Prepare as uploasding CD. 3.Load the CD in the CD tray. 4.TV screen shows http:/ 2-22-2Malfunction Check ChartDisassembly Diagram3-1 3-1