Philips-MCV-250-Service-Manual电路原理图.pdf

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1、version 1.0MCV250 3141 785 30080Service ManualVCD Micro Systemall versionsPublished by LX 0438 Service Audio Printed in The Netherlands Subject to modificationCopyright 2004 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced

2、, stored in a retrievalsystem or transmitted, in any form or by any means, electronic, mechanical, photocopying,or otherwise without the prior permission of Philips.Handling chip components .1-1Technical specification.2-1Service tools .2-1Service measurement setup.2-2Connections and controls.3-1.3-2

3、Instructions for uses .3-3.3-5Disassembly diagram .4-1Set block diagram.5-1Set wiring diagram.5-2DISPLAY BOARDcircuit diagram .6-1layout diagram .6-2KEY BOARD If your system is equipped with a VoltageSelector, set the VOLTAGE SELECTOR to thelocal power line voltage.All other connections have beenmad

4、e.WARNING!For optimal performance, use only theoriginal power cable.Never make or change any connectionswith the power switched on.To avoid overheating of the system, a safetycircuit has been built in. Therefore, yoursystem may switch to Standby modeautomatically under extreme conditions. Ifthis hap

5、pens, let the system cool downbefore reusing it (not available for all versions).Speaker (right)Speaker (left)MW loop antennaFM wire antennaINTelevisionLRIN-L+R-Pr/Cr Pb/Cb YS-VIDEO OUTVIDEO OUTDIGITAL OUTAUX inRLLINE OUTSUBWOOFER OUTFM aerial 75 SPEAKER8 COMPONENT VIDEO OUTAMaerialAC power cordCrCb

6、YBA220- 240V 110- 127V B Antennas ConnectionConnect the supplied MW loop antenna andFM antenna to the respective terminals.Adjust the position of the antenna for optimalreception.MW Antenna220- 240V 110-127V ANot for all versionsorBuilt-in FM wireantennaISDBB DSCREPEAT SHUFFLE REPEATA-BMIX SELALBUM

7、ALBUMDISPLAYOSDPBC RETURN DIGESTGOTO RESUME SLOW AUDIO/VOCALCLOCK SET TIMER SLEEP MUTEVCD/CD TUNER TAPE AUXECHOKEY PROG()+=#76fifl!50 CONNECTION AND CONTROLS3 - 2Controls (main sets illustration on page 3 the CD door is opened. the disc has reached the end. you select another source: TAPE, TUNER or

8、AUX.For MP3-CD onlyLoad a MP-3 music disc on the disc tray.The total album number and total title/ tracknumber “18 120“ will be displayed. MP3,ALBUM and TRACK will be shown.Notes:To ensure good system performance, wait untilthe disc is completely read before proceeding.For MP3-CD, the disc reading t

9、ime may exceed10 seconds due to the large number of songs anddifferent formats compiled in one disc.Selecting a different trackPress 4 / once or repeatedly until thedesired track number appears in the display.Press digit 0-9 on the remote control to selectthe desired track.(numbers consisting more t

10、han2 figures must be keyed in within 2 seconds).For MP3-CD onlyTo select a desired AlbumPress 4 or 3 repeatedly until the desiredAlbum appears on the display.ALBUM and “0XX 120” will be displayed.To select a desired Title/ TrackPress 4 / repeatedly until the desiredTitle appears on the display.Use t

11、he digital keys on the remote control toselect the track.TRACK and “018 XXX” will be displayed.Finding a passage within a trackTo search for a particular passage duringplayback:1 Press and hold 4 / .(CD only)2 When you recognise the passage you want,release 4 / .Normal playback continues.Note: Durin

12、g a disc programme, searching is onlypossible within the same track.For VCD onlyPress and hold 4 / to select a differentsearch speed and release the button until thedesired rewind or forward speed is shown onthe display or the TV.“REWINDX1“; “REWINDX2“; “REWINDX3“or “REWINDX4“ will be displayed on t

13、he TVscreen when you select a fast rewind search.“FORWARDX1“; “FORWARDX2“;“FORWARDX3“ or “FORWARDX4” will bedisplayed on the TV screen when you select afast forward search.Normal playback will begin at the end of thefast rewinding or forwarding of the selectedtrack.Playback returns to normal when PL

14、AY ispressed or when a new track is selected.Different play modes: SHUFFLEand REPEATYou can select and change the various playmodes before or during playback.SHUFFLE .tracks of the entire disc areplayed in random orderSHUFFLE REP ALLrepeats the entire disccontinuously in random orderREP ALL .repeats

15、 the entire disc/ programREP .plays the current trackrepeatedlyDigestThis feature allows you to scan through a VCDfor a quick review. PBC mode must be switchedoff.In the stop mode1 Press DIGEST on the remote control.The first 6 seconds of each track are played.2 Press digit 0 9 on the remote control

16、 to playthe desired tracks.Press 4 / to view the previous ornext page for additional information.During playback1 Press DIGEST on the remote control.The current track of the selected disc will bedivided into 9 parts and displayed on the TVscreen.2 Press digit 0 9 on the remote control to playfrom th

17、e desired position.3 Press 4 / to digest the previous or nexttrack.To exit the DIGEST modePress DIGEST again.Press on the remote control.Press 9 on the remote control.A-B RepeatThis feature is also applicable to audio CD(except MP3-CD). To play a certain scene orpassage of the disc repeatedly:1 Pres

18、s REPEAT A- B on the remote controlduring playback to mark the start of the chosenscene or passage.“REPEAT A“ appears on the TV screen.REPEAT A-B flashes on the display.2 Press REPEAT A- B again to mark the end ofthe chosen scene or passage.“REPEAT AB“ appears on the display.The selected scene or pa

19、ssage is playedrepeatedly.3 Press REPEAT A- B once more to return tonormal playback.“REPEAT AB CANCEL“ appears on thedisplay.Notes:You can also cancel the A-B Repeat by pressing4 / .You can set the A-B mark within the same track. If the track is completed before you set the endpoint, “REPEAT A“ will

20、 disappear at the end of thetrack and “REPEAT AB CANCEL“ will appear onthe TV screen.GOTO1 Press GOTO on the remoto control.“GOTO-: -” appears on the TV screen.2 Press digit 0 9 on the remoto control to keyin the disc time from which you want the disc tobegin.Notes: Switch off PBC before selecting G

21、OTO.ResumeIn the stop mode, press RESUME on theremote control to start playback again fromwhere you have stopped.Note: The resume information is lost if the disc tray isopened, the source is changed or the system isdisconnected from the power supply. Resume is not available when PBC mode isswitched

22、on.For VCD, it may take more than 20 seconds toresume playback due to the large number or sizeof tracks.VIDEO CDfollowing display on the TV screen.Below is an example of the OSD message.Track playing timeTrack remaining playing timeTotal remaining playing time OFFSINGLE REMAINXX MM:SS“XX“ is the cur

23、rent track.“MM“ is in minutes.“SS“ is in seconds.Note:You can also view the information from aMP3-CD or normal CD.Playing a Video CD with PBCVCD with PBC (Playback Control) will beindicated on the display of the set as soon as thedisc is inserted. PBC is a predefined playsequence stored in the VCD.1

24、 Switch on the TV, insert a VCD with PBC andpress to start playback.2 MENU appears on the TV screen.If the menu consists of a list of titles, youcan select a sequence directlyPress Digits 0-9 on the remote control toselect your choice.The VCD starts to play in the selectedsequence automatically.Note

25、: If a menu consists of more than one page, press4 / to go through the pages.Switching off PBCPress PBC on the remote control.“PBC OFF” appears on the TV screen.Notes: The programme mode is not available wheneverthe PBC mode is switched on. The menu structure depends on the informationstored on the

26、VCD. Please refer to the informationsupplied with the disc. PBC will be set to OFF if 9 is pressed. To play thesame VCD with PBC on, please press PBC on theremote control again.ReturnPress RETURN to return to the previous VCDdisc MENU level. PBC mode must be switchedon.VIDEO CDAdjusting the TV Syste

27、mBefore viewing the Video CD, ensure that the setis switched to corresponding PAL or NTSCsystem of your TV set (except Multisystem TV).Press and hold VCD/ CD onthe remote control for morethan 3 seconds to switchbetween PAL or NTSC TVsystem.OSD On Screen DisplayIf you insert a VCD/ CD/ MP3 disc, your

28、 TVscreen will serve as an additional display formessages (e.g. PLAY, STOP), and informationstored on the VCD.Press DISPLAY (OSD) on the remote controlrepeatedly to switch on or off the On ScreenDisplay.When OSD is switched ON; you can see theISDBB DSCREPEAT SHUFFLE REPEATA-BMIX SELALBUM ALBUMDISPLA

29、YOSDPBC RETURN DIGESTGOTO RESUME SLOW AUDIO/VOCALCLOCK SET TIMER SLEEP MUTEVCD/CD TUNER TAPE AUXECHOKEY PROGVCD/CD TUNERCD/VCD/MP3-CD Operation1 To select your play mode, press the REPEAT orSHUFFLE on the remote control before orduring playback until the display shows thedesired function. (SHUFFLE,

30、REP, REP ALL)2 Press to start playback if in the STOPposition.3 To return to normal playback, press REPEAT orSHUFFLE until the various SHUFFLE / REPEATmodes are no longer displayed.You can also press STOP 9 to cancel your playmode.Te xt display and ID3 TextIn CD modePress DISPLAY repeatedly to see t

31、he followinginformation.Track number and elapsed play time ofcurrent track.Remaining play time of current track.Total number of tracks played and totalplayed-back time.Total remaining number of tracks and totalremaining play time.In MP3-CD modeThis feature is used to display the title and albumname

32、for MP3-CD.Press DISPLAY repeatedly to display the titleor album name and ID3 Text.Notes: Album No., Title No. opening the CD compartment;change to other sourcePlaying a mixed mode discThis set can play a mixed mode disc. mixture of audio CD and MP3-CD mixture of other combination may not beoperated

33、 normally.1 As default, audio CD tracks will be read first.2 Press MIX/SEL (on the remote control)repeatedly to select other disc modes.MP3-CD:MP3 is displayed.TV screen, MP3 menu is displayed.Note :For protected CDs, “MIX CD-DA” is displayed onyour TV screen even if the disc does not have otherform

34、at. The MIX/SEL normal functions are notavailable for protected CDs.INSTRUCTIONS FOR USE3 - 4Slow1 Press SLOW on the remote control to watch aVCD at a slower speed. There are 4 types ofslow modes to select.The sound is muted.On TV screen, “SLOW 1/2”, “SLOW 1/4”,“SLOW 1/8”, SLOW 1/16 or PLAY is displ

35、ayed.2 To resume playback at normal speed, press .Microphone MixingConnect microphones (not supplied) to thesystem to sing along with the music source.1 Connect microphones to MIC jack.Before connecting the microphone, set themicrophone level with VOL to the lower level toprevent howling sound by tu

36、rning the MIC VOLknob.2 Select VCD/CD to start playback.Press ECHO to select MIC ON.3 Adjust the volume level of the source withVOLUME /+ control.4 Start singing or talking through the microphone.5 Press KEY to select key tone if necessary.Notes:Keep the microphones away from the speakersto prevent

37、howling. Microphone mixing only available in VCD mode.VocalThis feature allows you to fade out the originalvocal from a karaoke VCD. This feature is usedtogether with Echo mode. You can also use it toselect the different audio modes.Pressing VOCAL on the remote controlrepeatedly allows you to select

38、 the followingmodes.STEREO VOCALL-VOCAL R MONOL MONO R STEREO VOCAL LEFT/RIGHT - fade out the originalvocal for specially recorded karaoke discs only(press ECHO to select MIC ON)STEREO same effect as the original recordeddisc.MONO L/R select the language on a bilingualVCD.VIDEO CDEnsure that the MIC

39、 mode is switched onwhen pressing VOCAL to fade out the originalvocal during STEREO VOCAL L/R mode.Key ControlThis feature allows you to change the key toneof your vocal range.Press KEY on the remote control.“-KEY SHIFT+“ appears on the TV screen.Press VOLUME /+ to decrease or increase thevocal key

40、level between -6 and +6.EchoThis feature allows you to add echo while singingor talking through a microphone.Press ECHO on the remote control“-ECHO DELAY+“ appears on the TV screen.Press VOLUME /+ to decrease or increasethe echo level.Tape Operation/RecordingTape playback1 Select TAPE source.The dis

41、play shows “TAPE” briefly.2 Press OPEN to open the tape door.3 Insert a recorded tape and close the tape door.Load the tape with the open side downward andthe full spool to the left.4 Press to start playback.To stop playbackPress .To reset the tape counter displayIn stop mode, press once.Rewinding /

42、 Fast forwarding1 Stop playback, press S or .The tape will stop automatically at the end ofrewinding or fast forwarding.During fast winding, you can monitor the tapemessage with the tape counter.2 Press to stop rewinding or fast forwarding.Note: During rewinding or fast forwarding of a tape, itis al

43、so possible to select another source (CD orTUNER, for example).General information onrecordingFor recording, use only NORMAL (IEC type I)tapes on which the tabs have not yet beenbroken. This deck is not suitable for recording onMETAL (IEC IV) type tapes.The best recording level is set automatically.

44、Altering the VOLUME, INCREDIBLESURROUND or DBB will not affect therecording in progress.At the very beginning and end of the tape, norecording will take place during the 7 secondswhen the leader tape passes the recorder heads.To protect a tape from accidental erasure, havethe tape in front of you an

45、d break out the lefttab. Recording on this side is no longer possible.If, however, you wish to record over this sideagain, cover the tabs with a piece of adhesivetape.IMPORTANT!Recording is permissible if copyright orother rights of third parties are notinfringed upon.METAL (IEC IV) type tapes.ALBUM

46、 ALBUMVCD/CD TUNER TAPE AUXECHOKEY PROGRadio ReceptionTuning to radio stations1 Select TUNER source.“TUNER” is displayed briefly.2 Press BAND to select the desired waveband :FM or MW.3 Press and hold S or and then release it.The display will show “SEARCH“ until a radiostation with sufficient signal strength is found.If a FM station is received in stereo, isshown.4 Repeat step 3 if necessary until you find thedesired station.To tune to a weak station, press S or briefly and repeatedly until you have foundoptimal reception.Programming radio stationsY