Memorex-MVD4540-dvd-sm 电路图 维修手册.pdf

MVD4540 SERVICE MANUAL ORIGINAL MFRS VERSION A Design and specifications are subject to change without notice. CLASS 1 LASER PRODUCT DVD VIDEO PLAYER & VHS VIDEO CASSETTE RECORDER RadioFans.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 LASER BEAM WHICH COULD CAUSE HAZARDOUS RADIATION EXPOSURE IF DIRECTED. BE SURE TO OPERATE 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 CLOSE TO THE OPENING OF THE DISC TRAY AND OTHER OPENINGS TO LOOK INTO THE INSIDE OF THIS PLAYER. USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. DO NOT OPEN COVERS AND DO NOT REPAIR YOURSELF. REFER SERVICING TO QUALIFIED PERSONNEL. IMPORTANT WARNING Please include the following informations when you order parts. (Particularly the VERSION LETTER.) 1. MODEL NUMBER and VERSION LETTER The 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 DESCRIPTION You can find it in your SERVICE MANUAL. HOW TO ORDER PARTS SERVICING NOTICES ON CHECKING As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices in the operation manual. PERFORM A SAFETY CHECK AFTER SERVICING 4. Confirm that the screws, parts and wiring which were removed in order to service are put in the original positions, or whether there are the portions which are deteriorated around the serviced places serviced or not. Check the insulation between the antenna terminal or external metal and the AC cord plug blades. And be sure the safety of that. 2. USE THE DESIGNATED PARTS The parts in this equipment have the specific characters of incombustibility and withstand voltage for safety. Therefore, the part which is replaced should be used the part which has the same character. Especially as to the important parts for safety which is indicated in the circuit diagram or the table of parts as a mark, the designated parts must be used. 1. KEEP THE NOTICES3. PUT PARTS AND WIRES IN THE ORIGINAL POSITION AFTER ASSEMBLING OR WIRING There are parts which use the insulation material such as a tube or tape for safety, or which are assembled in the condition that these do not contact with the printed board. The inside wiring is designed not to get closer to the pyrogenic parts and high voltage parts. Therefore, put these parts in the original positions. A1-1 (Printed on the Rear Panel) CLASS 1 LASER PRODUCT RadioFans.CN 收音机爱 好者资料库 1. 2. Remove the Top Cabinet 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 Deck CD. (Refer to Fig. 3) DISC REMOVAL METHOD AT NO POWER SUPPLY Fig. 3 Deck CD Gear Insert hole for screw driver 1. 2. 3. 4. 5. Remove the Top 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 Loading Motor. Rotate the Pinch Roller Cam in the direction of the arrow by hand to slacken 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 to scratch on the tape. TAPE REMOVAL METHOD AT NO POWER SUPPLY Fig. 1 Pinch Roller Cam Main Cam Clutch Assy Main Chassis (Front Side) Loading Motor Screw Capstan DD Unit Fig. 2 A1-2 PARENTAL CONTROL - RATING LEVEL 4-DIGIT SECURITY CODE CANCELLATION If 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. 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 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. RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS IMPORTANT WARNING . SERVICING NOTICES ON CHECKING. HOW TO ORDER PARTS . TAPE REMOVAL METHOD AT NO POWER SUPPLY . DISC REMOVAL METHOD AT NO POWER SUPPLY . PARENTAL CONTROL-RATING LEVEL . TABLE OF CONTENTS. GENERAL SPECIFICATIONS . DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS. 2. REMOVAL OF VCR DECK PARTS . 3. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC . KEY TO 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 DIAGRAMS DVD. Y/C/AUDIO/CCD/HEAD AMP . SYSTEM CONTROL . REGULATOR. DISPLAY/OPERATION . HI-FI/DEMODULATOR. TUNER/JACK . DVD/HDD IN/OUT . POWER . PRINTED CIRCUIT BOARDS DVD MT . VCR MT . POWER/OPERATION . SCHEMATIC DIAGRAMS READ 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. INTERCONNECTION DIAGRAM . WAVEFORMS . MECHANICAL EXPLODED VIEW . CHASSIS EXPLODED VIEWS . MECHANICAL REPLACEMENT PARTS LIST . CHASSIS REPLACEMENT PARTS LIST. ELECTRICAL REPLACEMENT PARTS LIST. A1-1 A1-1 A1-1 A1-2 A1-2 A1-2 A2-1 A3-1A3-5 B1-1, B1-2 B2-1B2-6 B3-1, B3-2 C1-1, C1-2 C2-1 C3-1, C3-2 C4-1 D1-1 D1-1 D2-1D2-4 D3-1, D3-2 E-1, E-2 E-3, E-4 E-5, E-6 E-7, E-8 E-9, E-10 E-11, E-12 E-13, E-14 E-15, E-16 E-17, E-18 F-1, F-2 F-3F-6 F-7, F-8 G-1, G-2 G-3, G-4 G-5, G-6 G-7, G-8 G-9, G-10 G-11, G-12 G-13, G-14 G-15, G-16 G-17, G-18 G-19, G-20 G-21, G-22 G-23, G-24 G-25, G-26 G-27, G-28 G-29, G-30 G-31, G-32 H-1H-3 I1-1 I2-1, I2-2 J1-1 J2-1 J3-1J3-3 A2-1 GENERAL SPECIFICATIONS G-1Outline of the productDVD VIDEO PLAYER & VHS Player / Recorder G-2DVD SystemColor SystemNTSC DiscDVD, CD-DA, CD-R/RW Disc Diameter120 mm , 80 mm DeckDisc Loading SystemFront Disc Loding Motor3 Motors Pick up1-Lens 2-Beams System Playback time (Max) DVD 1-Layer135min (4.7GB) 245min (8.5GB) CD 74min VIDEO CD -min Search 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 times Actual 1/7-1/2 times (DVD) Rev - Actual - G-3VCRSystemVHS Player / Recorder SystemVideo SystemNTSC Hi-Fi STEREOYes NTSC PB(PAL60Hz)No DeckDECKOVD-7 Loading SystemFront Motor3 HeadsVideo Head4Head FM Audio Head2Head Audio /ControlMono/Yes Erase(Full Track Erase)Yes TapeRecPAL- SpeedNTSCSP/SLP PlayPAL- NTSCSP/LP/SLP Fast Forward / Rewind Time (Approx.) at 25oCFF:148/REW:148 with CassetteT-120 Forward/ReverseNTSC or PAL-MSP/LP/SLP = 3x,5x / 7x,9x / 9x,15x Picture SearchPAL or SECAM- Frame Advance1/10 Slow Speed1/10 G-4TuningBroadcasting SystemUS System M SystemTuner andSystem1Tuner Receive CHDestinationUS(w/CATV) Tuning SystemF-Synth Input ImpedanceVHF/UHF 75 OHM CH Coverage2-69,4A,A-5 A-1,AI, J W, W+1-W+84 Intermediate Picture(FP)45.75 MHz FrequencySound(FS)41.25 MHz FP-FS 4.50 MHz Preset CH- RF Converter OutputYes Channel3 or 4 ch Level/Impedance66 dBu / 75 Ohm Sound SelectorNo Stereo/Dual TV SoundUS-ST Tuner Sound MutingYes G-5PowerPower SourceAC120V 60Hz DC- Power Consumption 20 W at 120V 60Hz Stand by 3 W at 120V 60Hz Per Year - W ProtectorPower FuseYes G-6RegulationSafetyUL RadiationFCC LaserDHHS G-7TemperatureOperation 5oC - 40oC Storage -20oC - 60oC G-8Operating HumidityLess then 80% RH G-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 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 SP) A3-1 GENERAL SPECIFICATIONS Harmonic Distortion (1KHz) Typical 0.008% (1KHz) (DVD) , 1.5% (1KHz) (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 KHz Hi-Fi Audio SignalDynamic Range : More than90dB Frequency Response20Hz 20kHz Wow And Flutter : Less than0.01 %Wrms Channel Separation : More than60 dB Harmonic Distortion : Less than0.01 G-10On Screen (DVD) MenuYes DisplayMenu TypeIcon PictureYes TV ShapeYes Output SoundYes Audio Out SelectYes Dynamic Range ControlYes Karaoke VocalYes LanguageYes On-Screen LanguageYes Disc Menu LanguageYes Audio LanguageYes Subtitle LanguageYes DisplayYes On-Screen DisplaysYes BackgroundYes Screen SaverYes OperationalYes Pause/StillYes Parental LockYes Title StopYes PBCNo Initial SetupYes On-Screen LanguageYes TV ShapeYes Audio Out SelectYes OpenYes CloseYes No discYes ReadingYes PlayYes Still/PauseYes StopYes Prohib