Memorex-MVD4540-dvd-sm 维修电路原理图.pdf

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1、MVD4540SERVICE MANUALORIGINALMFRS VERSION ADesign and specifications are subject to change without notice.CLASS 1LASER PRODUCTDVD VIDEO PLAYER & VHS VIDEO CASSETTE RECORDERRadioFans.CN 收音机爱 好者资料库CAUTION:DVD PLAYER IS A CLASS 1 LASER PRODUCT. HOWEVER THIS PLAYER USES A VISIBLE LASERBEAM WHICH COULD C

2、AUSE HAZARDOUS RADIATION EXPOSURE IF DIRECTED. BE SURE TOOPERATE THE PLAYER CORRECTLY AS INSTRUCTED.THE FOLLOWING CAUTION LABEL IS LOCATED ON THE REAR PANEL OF THE PLAYER.WHEN THIS PLAYER IS PLUGGED TO THE WALL OUTLET, DO NOT PLACE YOUR EYES CLOSETO THE OPENING OF THE DISC TRAY AND OTHER OPENINGS TO

3、 LOOK INTO THE INSIDE OFTHIS PLAYER.USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THANTHOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.DO NOT OPEN COVERS AND DO NOT REPAIR YOURSELF. REFER SERVICING TO QUALIFIEDPERSONNEL.IMPORTANT WARNINGPlease include the followi

4、ng informations when you order parts. (Particularly the VERSION LETTER.)1. MODEL NUMBER and VERSION LETTERThe MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be found at the end of the SERIAL NUMBER.2. PART NO. and DESCRIPTIONYou can find it in your SERVICE MANUAL.HO

5、W TO ORDER PARTSSERVICING NOTICES ON CHECKINGAs for the places which need special attentions,they are indicated with the labels or seals on thecabinet, chassis and parts. Make sure to keep theindications and notices in the operation manual.PERFORM A SAFETY CHECK AFTERSERVICING4.Confirm that the scre

6、ws, parts and wiring whichwere removed in order to service are put in theoriginal positions, or whether there are theportions which are deteriorated around theserviced places serviced or not. Check theinsulation between the antenna terminal orexternal metal and the AC cord plug blades.And be sure th

7、e safety of that.2. USE THE DESIGNATED PARTSThe parts in this equipment have the specificcharacters of incombustibility and withstandvoltage for safety. Therefore, the part which isreplaced should be used the part which hasthe same character.Especially as to the important parts for safetywhich is in

8、dicated in the circuit diagram or thetable of parts as a mark, the designatedparts must be used.1. KEEP THE NOTICES3. PUT PARTS AND WIRES IN THEORIGINAL POSITION AFTERASSEMBLING OR WIRINGThere are parts which use the insulationmaterial such as a tube or tape for safety, orwhich are assembled in the

9、condition thatthese do not contact with the printed board.The inside wiring is designed not to get closerto the pyrogenic parts and high voltage parts.Therefore, put these parts in the originalpositions.A1-1(Printed on the Rear Panel)CLASS 1LASER PRODUCTRadioFans.CN 收音机爱 好者资料库1.2.Remove the Top Cabi

10、net and Front Cabinet. (Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)Rotate the gear of Deck CD section in the direction of the arrow by hand, remove the disc from DeckCD. (Refer to Fig. 3)DISC REMOVAL METHOD AT NO POWER SUPPLYFig. 3Deck CDGearInsert hole for screw driver1.2.3.4.5.Remove the Top

11、 Cabinet, Front Cabinet and DVD Block and the Fig. 1 below can be seen.(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)Remove one screw of the Loading Motor from the insert hole for screw driver and remove the LoadingMotor.Rotate the Pinch Roller Cam in the direction of the arrow by hand to slacke

12、n the Video Tape.(Refer to Fig. 2)Rotate the Clutch Assy either of the directions to wind the Video Tape in the Cassette Case.Repeat the above step 34. Then take out the Video Cassette from the Deck Chassis. Be careful not toscratch on the tape.TAPE REMOVAL METHOD AT NO POWER SUPPLYFig. 1Pinch Rolle

13、r CamMain CamClutch AssyMain Chassis (Front Side)Loading MotorScrewCapstan DD UnitFig. 2A1-2PARENTAL CONTROL - RATING LEVEL4-DIGIT SECURITY CODE CANCELLATIONIf the stored 4-digit security code in the Rating Level menu needs to be cancelled, please follow the steps below.Connect the set to TV Monitor

14、.Turn on the power, and set to the DVD stop mode.Press the SET UP button to display the DVD menu.Press the SET +/- button to select the Operation menu.Press the CH UP/DOWN button to select the Parental Lock, then press the ENTER button.Press the CH UP/DOWN button to select the ON or OFF, then press

15、the ENTER button.Press the STOP button four times on the remote control, then press the ENTER button.The 4-digit security code is cleared.Press the SET UP button to disappear the DVD menu.1.2.3.4.5.6.7.8.TABLE OF CONTENTSIMPORTANT WARNING .SERVICING NOTICES ON CHECKING.HOW TO ORDER PARTS .TAPE REMOV

16、AL METHOD AT NO POWER SUPPLY .DISC REMOVAL METHOD AT NO POWER SUPPLY .PARENTAL CONTROL-RATING LEVEL .TABLE OF CONTENTS.GENERAL SPECIFICATIONS .DISASSEMBLY INSTRUCTIONS1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS.2. REMOVAL OF VCR DECK PARTS .3. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC .KEY TO

17、ABBREVIATIONS .SERVICE MODE LIST .PREVENTIVE CHECKS AND SERVICE INTERVALS.WHEN REPLACING EEPROM (MEMORY) IC .SERVICING FIXTURES AND TOOLS .PREPARATION FOR SERVICING.MECHANICAL ADJUSTMENTS .ELECTRICAL ADJUSTMENTS.BLOCK DIAGRAMSDVD.Y/C/AUDIO/CCD/HEAD AMP .SYSTEM CONTROL .REGULATOR.DISPLAY/OPERATION .H

18、I-FI/DEMODULATOR.TUNER/JACK .DVD/HDD IN/OUT . POWER .PRINTED CIRCUIT BOARDS DVD MT .VCR MT .POWER/OPERATION .SCHEMATIC DIAGRAMSREAD CHANNEL.DSP.MPEG.MEMORY .AUDIO/VIDEO .SYSCON1 .Y/C/AUDIO/CCD/HEAD AMP .VCR SYSCON .TUNER/JACK .REGULATOR.DISPLAY .HI-FI/DEMODULATOR.DVD/HDD IN/OUT .POWER .OPERATION.INT

19、ERCONNECTION DIAGRAM .WAVEFORMS .MECHANICAL EXPLODED VIEW .CHASSIS EXPLODED VIEWS .MECHANICAL REPLACEMENT PARTS LIST .CHASSIS REPLACEMENT PARTS LIST.ELECTRICAL REPLACEMENT PARTS LIST.A1-1A1-1A1-1A1-2A1-2A1-2A2-1A3-1A3-5B1-1, B1-2B2-1B2-6B3-1, B3-2C1-1, C1-2C2-1C3-1, C3-2C4-1D1-1D1-1D2-1D2-4D3-1, D3-

20、2E-1, E-2E-3, E-4E-5, E-6E-7, E-8E-9, E-10E-11, E-12E-13, E-14E-15, E-16E-17, E-18F-1, F-2F-3F-6F-7, F-8G-1, G-2G-3, G-4G-5, G-6G-7, G-8G-9, G-10G-11, G-12G-13, G-14G-15, G-16G-17, G-18G-19, G-20G-21, G-22G-23, G-24G-25, G-26G-27, G-28G-29, G-30G-31, G-32H-1H-3I1-1I2-1, I2-2J1-1J2-1J3-1J3-3A2-1GENER

21、AL SPECIFICATIONSG-1Outline of the productDVD VIDEO PLAYER & VHS Player / RecorderG-2DVD SystemColor SystemNTSCDiscDVD, CD-DA, CD-R/RWDisc Diameter120 mm , 80 mmDeckDisc Loading SystemFront Disc LodingMotor3 MotorsPick up1-Lens 2-Beams SystemPlayback time (Max) DVD 1-Layer135min (4.7GB) 245min (8.5G

22、B) CD 74min VIDEO CD -minSearch speedFwd 2-100 times / 4 step (DVD) 4-8 times / 2 step (CD)Actual 2-70 times (DVD) 4-12times (CD)Rev 2-100 times / 4 step (DVD) 4-8 times / 2 step (CD)Actual 2-70 times (DVD) 4-16times (CD)Slow speedFwd 1/8-1/2 timesActual 1/7-1/2 times (DVD)Rev -Actual -G-3VCRSystemV

23、HS Player / RecorderSystemVideo SystemNTSCHi-Fi STEREOYesNTSC PB(PAL60Hz)NoDeckDECKOVD-7Loading SystemFrontMotor3HeadsVideo Head4HeadFM Audio Head2HeadAudio /ControlMono/YesErase(Full Track Erase)YesTapeRecPAL-SpeedNTSCSP/SLPPlayPAL-NTSCSP/LP/SLPFast Forward / Rewind Time (Approx.) at 25oCFF:148/REW

24、:148with CassetteT-120Forward/ReverseNTSC or PAL-MSP/LP/SLP = 3x,5x / 7x,9x / 9x,15xPicture SearchPAL or SECAM-Frame Advance1/10Slow Speed1/10G-4TuningBroadcasting SystemUS System MSystemTuner andSystem1Tuner Receive CHDestinationUS(w/CATV)Tuning SystemF-SynthInput ImpedanceVHF/UHF 75 OHMCH Coverage

25、2-69,4A,A-5 A-1,AI,J W, W+1-W+84Intermediate Picture(FP)45.75 MHzFrequencySound(FS)41.25 MHzFP-FS 4.50 MHzPreset CH-RF Converter OutputYesChannel3 or 4 chLevel/Impedance66 dBu / 75 OhmSound SelectorNoStereo/Dual TV SoundUS-STTuner Sound MutingYesG-5PowerPower SourceAC120V 60HzDC-Power Consumption 20

26、 W at 120V 60HzStand by 3 W at 120V 60HzPer Year - WProtectorPower FuseYesG-6RegulationSafetyULRadiationFCCLaserDHHSG-7TemperatureOperation5oC - 40oCStorage-20oC - 60oCG-8Operating HumidityLess then 80% RHG-9SignalVideo SignalOutput Level1 V p-p/75 ohm (DVD,VCR)S/N Ratio (Weighted) 65 dB(DVD)50 dB(V

27、CR)Horizontal Resolution500 Lines (DVD)230 Lines(VCR Mode)RGB SignalOutput Level-Audio SignalInput Level Microphone-Input Level Line -8 dBm/ 50k ohm(VCR) (0dB=0.775Vrms) Output Level Line -8 dBm/ 1k ohm(DVD,VCR)Digital Output Level0.5 V p-p / 75 ohm(DVD)S/N Ratio at (Weighted) 90dB(DVD), 42dB(VCR at

28、 SP)A3-1GENERAL SPECIFICATIONSHarmonic Distortion (1KHz) Typical0.008% (1KHz) (DVD) , 1.5% (1KHz) (VCR)Frequency Response : DVD Mode at DVD 4 Hz - 22 KHzDVD Mode at VIDEO CD-DVD Mode at CD 4 Hz - 20 KHzVCR Mode at SP100Hz - 10 KHzVCR Mode at LP-VCR Mode at SLP100Hz - 4 KHzHi-Fi Audio SignalDynamic R

29、ange : More than90dBFrequency Response20Hz 20kHzWow And Flutter : Less than0.01 %WrmsChannel Separation : More than60 dBHarmonic Distortion : Less than0.01G-10On Screen(DVD)MenuYesDisplayMenu TypeIconPictureYesTV ShapeYesOutput SoundYesAudio Out SelectYesDynamic Range ControlYesKaraoke VocalYesLangu

30、ageYesOn-Screen LanguageYesDisc Menu LanguageYesAudio LanguageYesSubtitle LanguageYesDisplayYesOn-Screen DisplaysYesBackgroundYesScreen SaverYesOperationalYesPause/StillYesParental LockYesTitle StopYesPBCNoInitial SetupYesOn-Screen LanguageYesTV ShapeYesAudio Out SelectYesOpenYesCloseYesNo discYesRe

31、adingYesPlayYesStill/PauseYesStopYesProhibit MarkYesStepYesSkip+YesSkip-YesRandomYesRepeatYesA-B RepeatYesSlow+ YesSlow- NoSearch+ YesSearch- YesResumeYesTitle No.YesChapter No.YesTrack No.YesTimeYesSub Title No.YesAngle No.YesAudio No.YesZoomYesEnterYesExitYesBit RateYesMemoryYesOn ScreenMenuYesDis

32、play(VCR)Menu TypeCharacterTimer Rec SetYesAuto Repeat On/OffYesSAP On/OffYesSurround On/OffNoCH Set-UpYesTV/CATVYesAuto CH MemoryYesAdd/DeleteYesGuide CHNoSystem Set UpYesClock SetYes (Calendar 12H)LanguageYesA3-2GENERAL SPECIFICATIONSNo Noise Back GroundYesAuto ClockYesStandard TimeYesDaylight Sav

33、ing TimeYesG-CODE(or SHOWVIEW or PLUSCODE)No. EntryNoStereo,Audio Output,SAPYesPlay/Stop/FF/Rew/Rec/OTR/T-Rec/Pause/Eject/Tape In/Repeat(Symbol Mark)YesCH/AVYesClockYesRepeatYesPin CodeNoTape CounterYesIndexYesHotel LockNoTape SpeedYesATR / Manual TrackingYesHi-FiYesG-11OSD LanguageDVD OSDEng Fre Sp

34、aVCR OSDEng Fre SpaG-12Clock,Timer Calendar1990/1/1 2081/12/31and TimerTimer Events 8 Program/ 1 MonthBack-upOne Touch Recording Max Time5 Hours(30,60,90,120,180,240,300)OTPB Valid TimeNoTimer Back-up (at Power Off Mode)5secG-13DisplayDISPLAYYesDISPLAY typeLED Module (Green, Rec &Timer symbol = Red)

35、Clock/Counter,CH,Timer Rec,OTR, PlayRec,FF(Cue),Rew(Rev),Stop,ATR,EjectNoVCRYesDVDYesCDYesClockYes (12h)AMNoPMYesCounter VCRYes (hour:min)DVDYes (hour:min)CDYes (min:sec)Counter RemainNoPlayYesStopNoRecYesFF / CueNoREW /ReviewNoPause/StillYesOTRNoT-RecYesChapterNoTITLENoTRACKYesRepeatNoHi-FiNoSPNoLP

36、NoSLPNoCHYesRF Output CHNoEjectYesTape InYesG-14RemoteUnitRC-ETControlGlow in Dark RemoconNoPower SourceVoltage(D.C)3VUM size x pcsUM-4 x 2 pcsTotal Keys45 KeyKeysPowerYesDISPLAY/CALLYes1Yes2Yes3Yes4Yes5Yes6Yes7Yes8Yes9Yes0YesInput SelectYesUP/CH+-YesDOWN/CH-YesLEFT/ SET- / TRACKING-YesRIGHT/ SET+ /

37、 TRACKING+YesVCR/DVDYesTV/VCRYesDVD MENUYesA3-3GENERAL SPECIFICATIONSTITLEYesSET UP MENU/VCR MENUYesSELECT/ENTERYesCLEAR/CANCELYesRETURNYesPLAY YesSTOPYesPAUSE/STILLYesFF(Cue)/SEARCH+YesREW(Review)/SEARCH-YesREC/OTRYesSKIP+ / INDEX+YesSKIP- / INDEX-YesAUDIO / AUDIO SELECTYesANGLE/COUNTER RESETYesSUB

38、 TITLE/ATRYesPLAY MODE/SPEEDYesT-RECYesCLOCK / COUNTERYesMEMORY/ZERO RETURNYesZOOMYesREPEAT A-BYesSLOW(Forward)YesMARKERNoOPEN/CLOSEYesEJECTYesG-15FeaturesAuto Power OffNo(DVD)Parental LockYesVideo CD PlaybackNoMP3 PlaybackYesDigital OutDolby DigitalYesPCMYesDTSYesMPEG1,MPEG2YesDown Mix Out(Dolby Di

39、gital, MPEG1,MPEG2)YesSelf DiagnosticNoSpatializer (N-2-2)NoScreen SaverYesFeaturesAuto Head CleaningYes(VCR)Auto TrackingYesHQ (VHS Standard High Quality)YesAuto Power On, Auto Play, Auto Rewind, Auto EjectYesAuto Power OffNoForward/Reverse Picture SearchYesVIDEO PLUS+(SHOWVIEW,G-CODE)NoOne Touch P

40、laybackNoAuto CH MemoryYesAREA CODENoAuto Clock SetYesIndex SearchYesSQPBNoCATVYesEnergy StarNoMTS(SAP)YesCM Skip(30sec x 6 Times)NoPower On MemoryNoSurroundNoG-16AccessoriesOwners ManualLanguageEnglish /Spanishw/Guarantee CardNoRemote Control UnitYesGuarantee CardYesRegistration CardNoWarning Sheet

41、NoService Station ListNoImportant TagNoAC Plug AdapterNoQuick Set-up SheetNoBatteryNoUM size x pcs-AC CordNoAV Cord Yes (1.2m)75 Ohm Coaxial CableYes (0.9m)S-Video CableNo21pin cableNo800 No StickerNoToll Free Insert SheetNoSafety TipNoG-17InterfaceSwitchFrontPowerYesPlayYesEject (VCR)YesStopYesRec/

42、OTRYesOpen/Close (DVD)YesCH +YesA3-4GENERAL SPECIFICATIONSCH -YesFF/ Search()YesRew/Search(MECHANICAL ADJUSTMENTS1-4: CONFIRMATION OF VSR TORQUE1.2.Install the Torque Gauge (JG002F) and Adapter (JG002B)on the S Reel. Set to the Picture Search (Rewind) mode.(Refer to Fig.1-4-B)Then, confirm that it i

43、ndicates 120180gfcm.NOTEIf the torque is out of the range, replace the following parts.2. CONFIRMATION AND ADJUSTMENTOF TAPE RUNNING MECHANISMTape Running Mechanism is adjusted precisely at thefactory. Adjustment is not necessary as usual. When youreplace the parts of the tape running mechanism beca

44、useof long term usage or failure, the confirmation and adjust-ment are necessary.2-1: GUIDE ROLLER1.2.3.4.5.6.7.Playback the VHS Alignment Tape (JG001 or JG001B).(Refer to SERVICING FIXTURE AND TOOLS)Connect CH-1 of the oscilloscope to TP101 (Envelope)and CH-2 to TP3002 (SW Pulse).Press and hold the

45、 Tracking-Auto button on the remotecontrol more than 2 seconds to set tracking to center.Trigger with SW Pulse and observe the envelope. (Referto Fig. 2-1-A)When observing the envelope, adjust the AdjustingDriver (JG005) slightly until the envelope will be flat.Even if you press the Tracking Button,

46、 adjust so thatflatness is not moved so much.Adjust so that the A : B ratio is better than 3 : 2 as shownin Fig. 2-1-B, even if you press the Tracking Button tomove the envelope (The envelope waveform will begin todecrease when you press the Tracking Button).Adjust the PG shifter during playback.(Re

47、fer to the ELECTRICAL ADJUSTMENTS)NOTEAfter adjustment, confirm and adjust A/C head.(Refer to item 2-2)Fig. 2-1-ACH-1Envelope(TP101)CH-1TrackCH-2TrackCH-2SW Pulse (TP3002)Fig. 2-1-BEntranceMaxExitMaxABNOTEInstall the Torque Gauge on the reel disk firmly. Press theREW button to turn the reel disk.1-5

48、: CONFIRMATION OF REEL BRAKE TORQUE(S Reel Brake) (Refer to Fig. 1-4-B)1.2.3.4.Once set to the Fast Forward mode then set to the Stopmode. While, unplug the AC cord when the Pinch RollerBlock is on the position of Fig. 1-4-A.Move the Idler Assy from the S Reel.Install the Torque Gauge (JG002F) and A

49、dapter(JG002B) on the S Reel. Turn the Torque Gauge(JG002F) clockwise.Then, confirm that it indicates 60100gfcm.(T Reel Brake) (Refer to Fig. 1-4-B)1.2.3.4.Once set to the Fast Forward mode then set to the Stopmode. While, unplug the AC cord when the Pinch RollerBlock is on the position of Fig. 1-4-

50、A.Move the Idler Assy from the T Reel.Install the Torque Gauge (JG002E) and Adapter(JG002B) on the T reel. Turn the Torque Gauge(JG002E) counterclockwise.Then, confirm that it indicates 3050gfcm.Fig. 1-4-AThe position at FF mode.Stop at this position.The position atSTOP mode.Capstan DD UnitCassette