Memorex-MVD4540B-dvd-sm 维修电路原理图.pdf

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1、MVD4540BSERVICE MANUALORIGINALMFRS VERSION BDesign and specifications are subject to change without notice.DVD VIDEO PLAYER & VHS VIDEO CASSETTE RECORDERCLASS 1LASER PRODUCTRadioFans.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

2、CAUSE 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 T

3、O 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 follow

4、ing 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.H

5、OW 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 scr

6、ews, 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 t

7、he 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 i

8、ndicated 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TAPE REMOVAL METHOD AT

10、 NO POWER SUPPLYFig. 1Fig. 2PARENTAL CONTROL - RATING LEVEL4 DIGIT PASSWORD CANCELLATIONIf the stored 4 digit password in the Rating Level menu needs to be cancelled, please follow the steps below.Turn Unit ON.Press and hold the 7 key on the remote control unit.Simultaneously press and hold the STOP

11、 key on the front panel.Hold both keys for more than 3 seconds.The On Screen Display message PASSWORD CLEAR will appear.The 4 digit password has now been cleared1.2.3.4.5.6.Remove the Top Cabinet, Front Cabinet and DVD Block. (Refer to item 1 of theDISASSEMBLY INSTRUCTIONS.)Remove the screw 1 of the

12、 Deck Chassis and remove the Loading Motor. (Refer to Fig. 2)Rotate the Pinch Roller Cam in the direction of the arrow by hand to slacken the Video Tape.Rotate the Clutch Assy either of the derections to wind the Video Tape in the Cassette Case.Repeat the above step 34. Then take out the Video Casse

13、tte from the Deck Chassis. Be careful not toscratch on the tape.1.2.3.4.5.Main CamClutch AssyMain Chassis (Front Side)Loading MotorCapstan DD UnitPinch Roller CamScrew 1A1-21.2.3.Remove the Top Cabinet and Front Cabinet. (Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)Slide the Rack Loading (White

14、) toward the arrow direction by using a minus driver to release the lock.(Refer to Fig. 1)Draw the Tray.DISC REMOVAL METHOD AT NO POWER SUPPLYFig. 1DVD DeckRack Loading(White)TABLE OF CONTENTSIMPORTANT WARNING .SETVICING NOTICES ON CHECKING .HOW TO ORDER PARTS .TAPE REMOVAL METHOD AT NO POWER SUPPLY

15、 .DISC REMOVAL METHOD AT NO POWER SUPPLY .TABLE OF CONTENTS.GENERAL SPECIFICATIONS.DISASSEMBLY INSTRUCTIONS1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS.2. REMOVAL OF VCR PARTS .3. REMOVAL OF DVD DECK PARTS.4. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC .KEY TO ABBREVIATIONS .SERVICE MODE LIST .PR

16、EVENTIVE 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 .SYSCON.OPERATION/DISPLAY .HI-FI/DEMODULATOR.TUNER/JACK .POWER .PRINTED CIRCUIT BOA

17、RDSDVD.VCR/OPERATION .VCR.SCHEMATIC DIAGRAMSMPEG/MICON .MEMORY.RF AMP/DSP.AUDIO/VIDEO .Y/C/AUDIO/CCD/HEAD AMP .SYSCON .TUNER/JACK .OPERATION/DISPLAY .HI-FI/DEMODULATOR.POWER .OPERATION/LED.INTERCONNECTION DIAGRAM .WAVEFORMS .MECHANICAL EXPLODED VIEW .CHASSIS EXPLODED VIEWS .DVD DECK EXPLODED VIEW.ME

18、CHANICAL REPLACEMENT PARTS LIST .CHASSIS REPLACEMENT PARTS LIST.DVD DECK REPLACEMENT PARTS LIST .ELECTRICAL REPLACEMENT PARTS LIST.A1-1A1-1A1-1A1-2A1-2A2-1A3-1A3-7B1-1, B1-2B2-1B2-6B3-1B3-4B4-1, B4-2C1-1, C1-2C2-1C3-1, C3-2C4-1D1-1D1-1D2-1D2-4D3-1, D3-2E-1, E-2E-3, E-4E-5, E-6E-7, E-8E-9, E-10E-11,

19、E-12E-13, E-14F-1, F-2F-3, F-4F-5, F-6G-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-24H-1, H-2I1-1I2-1, I2-2I3-1J1-1J2-1J3-1J4-1, J4-2A2-1GENERAL SPECIFICATIONSG-1Outline of the productDVD VIDEO PLAYER & VHS Player / RecorderG-2DVD Syste

20、mColor SystemNTSCDiscDVD, CD-DA, CD-R/RWDisc Diameter120 mm , 80 mmDeckDisc Loading SystemFront Disc LoadingMotor2 MotorsPick up1-Lens 2-Beams SystemPlayback time (Max) DVD 1-Layer135min (4.7GB) DVD 2-Layer245min (8.5GB) CD 74min VIDEO CD -minSearch speedFwd 2-20 times / 4 steps Actual 2-45 times (D

21、VD) 4-40 times (CD)Rev 2-20 times / 4 steps Actual 2-45 times (DVD) 4-40 times (CD)Slow speedFwd 1/7-1/2 timesActual -Rev -Actual -G-3VCRSystemVHS Player / RecorderSystemVideo SystemNTSCHi-Fi STEREOYesNTSC PB(PAL60Hz)NoDeckDECKOVD-7Loading SystemFrontMotor3HeadsVideo Head4HeadFM Audio Head2HeadAudio

22、 / ControlMono/YesErase (Full Track Erase)YesTapeRecPAL-SpeedNTSCSP/SLPPlayPAL-NTSCSP/LP/SLPFast Forward / Rewind Time (Approx.) at 25oCFF:148/REW:148with CassetteT-120Forward/ReverseNTSC or PAL-MSP/LP/SLP = 3x,5x / 7x,9x / 9x,15xPicture SearchPAL or SECAM-Frame AdvanceYesSlow Speed1/10G-4TuningBroa

23、dcasting SystemUS System MSystemTuner andSystem1Tuner Receive CHDestinationUS (w/CATV)Tuning SystemF-SynthInput ImpedanceVHF/UHF 75 OHMCH Coverage2-69,4A,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

24、chLevel / Impedance66 dBu / 75 OhmSound SelectorNoStereo / Dual TV SoundUS-STTuner Sound MutingYesG-5PowerPower SourceAC120V 60HzDC-Power Consumption 18 W at 120V 60HzStand by 2 W at 120V 60HzPer Year - WProtectorPower FuseYesG-6RegulationSafetyULRadiationFCCLaserDHHSG-7TemperatureOperation 5oC - 40

25、oCStorage-20oC - 60oCG-8Operating HumidityLess than 80% RHA3-1GENERAL SPECIFICATIONSG-9SignalVideo SignalOutput Level1 V p-p/75 ohm (DVD,VCR)S/N Ratio (Weighted) 65 dB(DVD)50 dB(VCR)Horizontal Resolution500 Lines (DVD)230 Lines(VCR Mode)RGB SignalOutput Level-Audio SignalInput Level Microphone-Input

26、 Level Line -8 dBm/ 50k ohm (VCR, 0dBm=0.775Vrms)Output Level Line -8 dBm/ 1k ohm (VCR,0dBm=0.775Vrms)-12dBm/ 1k ohm (DVD, -20dBFs 0dBFs=2.0Vrms)Digital Output Level0.5 V p-p / 75 ohm(DVD)S/N Ratio at (Weighted) 90dB(DVD), 42dB(VCR at SP)Harmonic Distortion (1KHz) Typical0.02% (1KHz) (DVD) , 1.5% (1

27、KHz) (VCR)Frequency Response : DVD Mode at DVD 4 Hz - 22 KHz DVD Mode at VIDEO CD- DVD Mode at CD 4 Hz - 20 KHz VCR Mode at SP100Hz - 10 KHz VCR Mode at LP- VCR Mode at SLP100Hz - 4 KHzHi-Fi Audio SignalDynamic Range : More than90dBFrequency Response20Hz 20kHzWow And Flutter : Less than0.01 %WrmsCha

28、nnel Separation : More than60 dBHarmonic Distortion : Less than0.01A3-2GENERAL SPECIFICATIONSG-10On ScreenMenuYesDisplay (DVD)Menu TypeCharacterLanguageYesMenuYesSub TitleYesAudioYesPictureYesTV Screen SizeYesOSD Display On/OffYesJPEG IntervalNoSelect FilesNoSoundYesDRC (Dynamic Range Control)Yesdts

29、 DecodeNoOutput (5.1ch/2ch)NoSurround On/OffNoCenter On/OffNoSub Woofer On/OffNoParentalYesPassword Lock/UnlockYesRating LevelYesOtherYesOSD Language (Set up Language)YesOutput (RGB / Composite)NoOpenYesCloseYesNo discYesReadingYesPlayYesStill/PauseYesStopYesProhibit MarkYesStepYesSkip (|)YesSkip (|

30、)YesRew/Search(MECHANICAL ADJUSTMENTS2-2: CONFIRMATION AND ADJUSTMENT OF AUDIO/CONTROL HEADWhen the Tape Running Mechanism does not work well,adjust the following items.1.2.3.4.Playback the VHS Alignment Tape (JG001 or JG001B).(Refer to SERVICING FIXTURE AND TOOLS)Confirm that the reflected picture

31、of stamp mark isappeared on the tape prior to P4 Post as shown in Fig. 2-2-A.a)b)Turn the screw (2) to set the audio level to maximum.Confirm that the bottom of the Audio/ Control Head andthe bottom of the tape is shown in Fig. 2-2-C.c)When the reflected picture is distorted, turn the screw(1) clock

32、wise until the distortion is disappeared.When the reflected picture is not distorted, turn thescrew (1) counterclockwise until little distortion isappeared, then adjust the a).When the height is not correct, turn the screw (3) toadjust the height. Then, adjust the 13 again.Fig. 2-2-AAudio/Control He

33、adReflected picture ofStamp MarkP4 CapStamp MarkFig. 2-2-B(3)Audio/Control Head(2)(1)(4)Fig. 2-2-CAudio/Control HeadTape0.250.05mmD2-32-3: TAPE RUNNING ADJUSTMENT(X VALUE ADJUSTMENT)1.2.3.4.5.6.7.8.Confirm and adjust the height of the Reel Disk.(Refer to item 1-1)Confirm and adjust the position of t

34、he Tension Post.(Refer to item 1-2)Adjust the Guide Roller. (Refer to item 2-1)Confirm and adjust the Audio/Control Head.(Refer to item 2-2)Connect CH-1 of the oscilloscope to TP3002, CH-2 toTP101 and CH-3 to HOT side of Audio Out Jack.Playback the VHS Alignment Tape (JG001S or JG001T).(Refer to SER

35、VICING FIXTURE AND TOOLS)Press and hold the ATR button on the remote controlmore than 2 seconds to set tracking to center.Set the X Value adjustment driver (JG153) to the (4) ofFig. 2-2-B. Adjust X value so that the envelope waveformoutput becomes maximum. Check if the relation betweenAudio and Enve

36、lope waveform becomes (1) or (2) of Fig.2-3.Fig. 2-3Envelope(1)CH-3Audio(2)2-4: CONFIRM HI-FI AUDIO (Hi-Fi model only)1.2.3.4.5.6.7.Connect CH-1 of the oscilloscope to TP101 and CH-2 tothe Hi-Fi Audio Out Jack.Playback the VHS Alignment Tape (JG001P or JG001Q).(Refer to SERVICING FIXTURE AND TOOLS)P

37、ress and hold the ATR button on the remote controlmore than 2 seconds to set tracking to center.Press the Tracking Up button and count number of stepswhich the audio output is changed from Hi-Fi (10KHz) toMONO (6KHz).Press and hold the ATR button on the remote controlmore than 2 seconds to set track

38、ing to center.Press the Tracking Down button and count number ofsteps which the audio output is changed from Hi-Fi(10KHz) to MONO (6KHz).If the difference are more than 3 steps, set the X Valueadjustment driver (JG153) to (4) of Fig. 2-2-B. Changethe X Value and adjust it so that the value becomeswi

39、thin 2 steps.MECHANICAL ADJUSTMENTS3. MECHANISM ADJUSTMENT PARTS LOCATION GUIDE123456789101. Tension Connect2. Tension Arm3. Guide Roller4. Audio/Control Head5. X value adjustment driver hole6. 7.8.9.10.P4 PostT Brake SpringT ReelS ReelAdjusting section for the Tension Arm positionD2-4ELECTRICAL ADJ

40、USTMENTSD3-1Read and perform this adjustment when repairing thecircuits or replacing electrical parts or PCB assemblies.1. BASIC ADJUSTMENTCAUTION1-1: PG SHIFTERCONDITIONSMODE-PLAYBACKInput Signal-Alignment Tape (JG001P)INSTRUCTIONSConnect CH-1 on the oscilloscope to TP3002 and CH-2to TP8001.Playbac

41、k the alignment tape. (JG001P)Press and hold the Tracking-Auto button on the remotecontrol more than 2 seconds to set tracking to center.Press both CH UP button on the set and the STOPbutton on the set for more than 2 seconds.1.2.3.4.When you exchange IC and Transistor for a heat sink,apply the sili

42、con grease (YG6260M) on the contactsection of the heat sink. Before applying new silicongrease, remove all the old silicon grease. (Old greasemay cause damages to the IC and Transistor.)6.5HCH-1CH-2Fig. 1-1-ACH-1CH-26.5HFig. 1-1-BELECTRICAL ADJUSTMENTS2. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (W

43、IRING CONNECTION)D3-2DVD PCBCD2301CD2001CD2302VCR PCBCP4002CP8102CP2601CP2603CP2602J8101OS8101J8103SW8101J8102AC INCD501CP501CP8002TP3001CP102AC HEADCD102TP8001CP103FE HEADTP101TP3002OPERATION PCBCP681DVD DECKCD8002S501S502V651J8001TU301J8002CD681CP651READ CHANNELIC2601ZR36707TQCDual OP-AMPIC2602BA1

44、0358F-E2FLASH 8MIC4007SST39VF800A-70-4C-EKMPEG/MICONIC4001ZR36762AUDIO AMPIC8101NJM4580M(TE1)REG+1.8VIC4003PQ070XZ01ZP64M SDRAMIC4005M12L64164A-7TPick upLoading MotorSpindle/SledMotorDVD LOADERDM IIMotor DriverIC2301LA6560A, B, C, D, E, FSPDL+/SPDL_SENSVCR BLOCKVIDEO OUT SWSW8101SK42H0IG9ATXRXP.CON+

45、3.3VDVD BLOCK DIAGRAMCD, DVD, LDRFA_SDEN, DATA, SCLKEEPROMIC4002AT24C04N-10SI-2.7CP4002RFAAF_CE, FE, TE, PIFNN, FNPVBIASS0, S1DEFECT, LINK, MIRR, LDONHOME, TIN SW, TOUT SWTR+/, FO+/SPDL+/, SLED+/SPINDLE, SLED_PWMTRACK, FOCUS_DACADC IN 5, 6, 7S MUTEHD0HD15,HA0HA20SDA0SDA11SDD0SDD15I DAT2I CLK2P.CON+5

46、VP.CON+9VP.CON+12VAT+5VDVD RESETCP8102DVD VIDEODVD AUDIO LDVD AUDIO RSYSTEM MUTESTEREO DACIC7301PCM1742 KE/2KY/C SEPAJ810234Y532CYUVAUDIO MUTEQ8101Q8105YUV OUTJ8103DIGITAL AUDIO DRIVERQ8107DVD AUDIO OUTJ8101325SPDIFDVD AUDIO LDVD AUDIO RASDATA0AMCLKABCLKALRCLKA, B, CDACDAC DE-1E-2OPTICALOS8101Y/C/AU

47、DIO/CCD/HEAD AMP BLOCK DIAGRAM302223210216765793668345554535743578 76H.AMPSWREC AMPCP102564AUDIO PBAUDIO RECCTL+HEADAUDIOCONTROL312AE HEAD(-)AE HEAD(+)CTL-CTL+CTL-Y/C/AUDIO/CCD/HEAD AMP ICIC101LA71206M-MPB39Q107BUFFERTIMMINGCCDOUTDRIVERCLAMP37586059242566H.SW727374H.SWHLHLHLPB.EEPRWCDCNLEMPHARECFM-E

48、QFMMODPRAGCAMPKILFMAGCDELAYPBFM-EQPBPHASE-EQPRC-LPFGCAB-UPAMPACCAMPMainCONV3.58MBPF2AUTO BIASPRKILB.D.PBAMP3.58MBPF1DOUBLELIMFMDEMSUBLPFV/ICONVPRY-LPFYNR/COMBN.L.DEEMNC1Y/C MIXSYNCSEPVCACLAMP1/2FBCCharaINS.6dBPRPRV-AGCL101CLAMPEQAMPLINEAMPMUTEALCY/C_CSY/C_DATAY/C_CLKH. AMP_SWC. ROTARYH. SWENV. DETCO

49、MPDUMMY_V. SYNCC.SYNCFRONT_V_INTU/REAR_V_INTO_NORMAL_AFROM_NORMAL_A2315Q105BIAS CTL114P. CON + 5VH.AMP SW/AUDIO MUTEC ROTRF SW INENV DETCOMPOUTQ104BIAS OSCQ103SWQ101, Q102AUDIO PB SWHF1HF2HI-FI/DEMODULATORHF_COMCOIL, BIAS OSCX1013.579545M HzVX015049PULL41Q109BUFFERTUNER/JACKSYSCONHI-FI/DEMODULATOR80

50、SERIALDECODERAUDIO_MUTE-HV.REC_ST-HLPFALCDETPRSYSCONSYSCONEP/LP-CH1 (R)EP/LP-CH2 (L)CP101654SP-CH1 (R)SP_COMSP-CH2 (L)CYL321EP/LP_COMHF2 (L)HF_COMHF1 (R)789FE HEAD (HOT)FE HEAD (GND)FE HEAD21CP103DETALENH28DVD V OUTFSC26Y/C_VIDEO_OUTQ106BUFFERDVDPOWERE-3E-4434FSCFSCSYSCON/TIMER/SERVOIC3001 OEC0138BY