Memorex-MVD4540B-dvd-sm 电路图 维修手册.pdf

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1、MVD4540B SERVICE MANUAL ORIGINAL MFRS VERSION B Design and specifications are subject to change without notice. DVD VIDEO PLAYER & VHS VIDEO CASSETTE RECORDER CLASS 1 LASER PRODUCT 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 W

2、HICH 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 O

3、THER 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 Ple

4、ase 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 i

5、t 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 AFT

6、ER 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

7、 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. Especia

8、lly 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

9、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

10、) CLASS 1 LASER PRODUCT RadioFans.CN 收音机爱 好者资料库 TAPE REMOVAL METHOD AT NO POWER SUPPLY Fig. 1 Fig. 2 PARENTAL CONTROL - RATING LEVEL 4 DIGIT PASSWORD CANCELLATION If the stored 4 digit password in the Rating Level menu needs to be cancelled, please follow the steps below. Turn Unit ON. Press and hol

11、d the 7 key on the remote control unit. Simultaneously press and hold the STOP 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 cleared 1. 2. 3. 4. 5. 6. Remove the Top Cabinet, Front Cabinet a

12、nd DVD Block. (Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.) Remove the screw 1 of the 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

13、 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. 1. 2. 3. 4. 5. Main Cam Clutch Assy Main Chassis (Front Side) Loading Motor Capstan DD Unit Pinch Roller Cam Screw 1 A1-2 1. 2. 3. Remove the

14、 Top Cabinet and Front Cabinet. (Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.) Slide the Rack Loading (White) 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 SUPPLY Fig. 1 DVD Deck Rack Loading (White) Radio

15、Fans.CN 收音机爱 好者资料库 TABLE OF CONTENTS IMPORTANT WARNING . SETVICING NOTICES ON CHECKING . HOW TO ORDER PARTS . TAPE REMOVAL METHOD AT NO POWER SUPPLY . DISC REMOVAL METHOD AT NO POWER SUPPLY . TABLE OF CONTENTS. GENERAL SPECIFICATIONS. DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS AND P. C.

16、 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 . PREVENTIVE CHECKS AND SERVICE INTERVALS. WHEN REPLACING EEPROM (MEMORY) IC . SERVICING FIXTURES AND TOOLS . PREPARATION FOR SERVICING. MECHANIC

17、AL ADJUSTMENTS . ELECTRICAL ADJUSTMENTS. BLOCK DIAGRAMS DVD. Y/C/AUDIO/CCD/HEAD AMP . SYSCON. OPERATION/DISPLAY . HI-FI/DEMODULATOR. TUNER/JACK . POWER . PRINTED CIRCUIT BOARDS DVD. VCR/OPERATION . VCR. SCHEMATIC DIAGRAMS MPEG/MICON . MEMORY. RF AMP/DSP. AUDIO/VIDEO . Y/C/AUDIO/CCD/HEAD AMP . SYSCON

18、 . TUNER/JACK . OPERATION/DISPLAY . HI-FI/DEMODULATOR. POWER . OPERATION/LED. INTERCONNECTION DIAGRAM . WAVEFORMS . MECHANICAL EXPLODED VIEW . CHASSIS EXPLODED VIEWS . DVD DECK EXPLODED VIEW. MECHANICAL REPLACEMENT PARTS LIST . CHASSIS REPLACEMENT PARTS LIST. DVD DECK REPLACEMENT PARTS LIST . ELECTR

19、ICAL REPLACEMENT PARTS LIST. A1-1 A1-1 A1-1 A1-2 A1-2 A2-1 A3-1A3-7 B1-1, B1-2 B2-1B2-6 B3-1B3-4 B4-1, B4-2 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 F-1, F-2 F-3, F-4 F-5, F-6 G-1, G-2 G-3, G-4 G-5, G-6 G-7, G-8

20、 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 H-1, H-2 I1-1 I2-1, I2-2 I3-1 J1-1 J2-1 J3-1 J4-1, J4-2 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 Dia

21、meter120 mm , 80 mm DeckDisc Loading SystemFront Disc Loading Motor2 Motors Pick up1-Lens 2-Beams System Playback time (Max) DVD 1-Layer135min (4.7GB) DVD 2-Layer245min (8.5GB) CD 74min VIDEO CD -min Search speedFwd 2-20 times / 4 steps Actual 2-45 times (DVD) 4-40 times (CD) Rev 2-20 times / 4 step

22、s Actual 2-45 times (DVD) 4-40 times (CD) Slow speedFwd 1/7-1/2 times Actual - 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 (Fu

23、ll 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 AdvanceYes Slow Speed1/10 G-4TuningBroadcasting SystemU

24、S 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 Le

25、vel / Impedance66 dBu / 75 Ohm Sound SelectorNo Stereo / Dual TV SoundUS-ST Tuner Sound MutingYes G-5PowerPower SourceAC120V 60Hz DC- Power Consumption 18 W at 120V 60Hz Stand by 2 W at 120V 60Hz Per Year - W ProtectorPower FuseYes G-6RegulationSafetyUL RadiationFCC LaserDHHS G-7TemperatureOperation

26、 5oC - 40oC Storage -20oC - 60oC G-8Operating HumidityLess than 80% RH A3-1 GENERAL SPECIFICATIONS 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 Lev

27、el Microphone- Input 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

28、.02% (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 F

29、lutter : Less than0.01 %Wrms Channel Separation : More than60 dB Harmonic Distortion : Less than0.01 A3-2 GENERAL SPECIFICATIONS G-10On Screen Menu Yes Display (DVD)Menu TypeCharacter LanguageYes MenuYes Sub TitleYes AudioYes PictureYes TV Screen SizeYes OSD Display On/OffYes JPEG IntervalNo Select

30、FilesNo SoundYes DRC (Dynamic Range Control)Yes dts DecodeNo Output (5.1ch/2ch)No Surround On/OffNo Center On/OffNo Sub Woofer On/OffNo ParentalYes Password Lock/UnlockYes Rating LevelYes OtherYes OSD Language (Set up Language)Yes Output (RGB / Composite)No OpenYes CloseYes No discYes ReadingYes Pla

31、yYes Still/PauseYes StopYes Prohibit MarkYes StepYes Skip (|)Yes Skip (|)Yes Rew/Search( MECHANICAL ADJUSTMENTS 2-2: CONFIRMATION AND ADJUSTMENT OF AUDIO/ CONTROL HEAD When the Tape Running Mechanism does not work well, adjust the following items. 1. 2. 3. 4. Playback the VHS Alignment Tape (JG001 o

32、r JG001B). (Refer to SERVICING FIXTURE AND TOOLS) Confirm that the reflected picture of stamp mark is appeared 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 and the bottom of the ta

33、pe is shown in Fig. 2-2-C. c) When the reflected picture is distorted, turn the screw (1) clockwise until the distortion is disappeared. When the reflected picture is not distorted, turn the screw (1) counterclockwise until little distortion is appeared, then adjust the a). When the height is not correct,