Magnavox-MWD200F-dvd-sm 维修电路原理图.pdf

SERVICE MANUALDVD PLAYERMWD200FOPEN/CLOSE PLAYSTOPSTANDBY-ONRadioFans.CN 收音机爱 好者资料库IMPORTANT SAFETY NOTICEProper service and repair is important to the safe, reliable operation of allFunai Equipment. The service procedures recommended by Funai anddescribed in this service manual are effective methods of performingservice operations. Some of these service special tools should be usedwhen and as recommended.It is important to note that this service manual contains various CAUTIONSand NOTICES which should be carefully read in order to minimize the riskof personal injury to service personnel. The possibility exists that improperservice methods may damage the equipment. It also is important tounderstand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE.Funai could not possibly know, evaluate and advice the service trade of allconceivable ways in which service might be done or of the possiblehazardous consequences of each way. Consequently, Funai has notundertaken any such broad evaluation. Accordingly, a servicer who uses aservice procedure or tool which is not recommended by Funai must firstuse all precautions thoroughly so that neither his safety nor the safeoperation of the equipment will be jeopardized by the service methodselected.TABLE OF CONTENTSSpecifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1-1Laser Beam Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2-1Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3-1Standard Notes for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4-1Cabinet Disassembly Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5-1How to Initialize the DVD Player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6-1Firmware Renewal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7-1Block Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8-1Schematic Diagrams / CBAs and Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9-1Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10-1Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11-1System Control Timing Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12-1Lead Identifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13-1Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14-1Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15-1Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16-1Manufactured under license from Dolby Laboratories. “Dolby” and the double-D symbol are trademarks of Dolby Laboratories.RadioFans.CN 收音机爱 好者资料库1-1-1E6161SPSPECIFICATIONSNotes:1.All Items are measured without pre-emphasis unless otherwise specified.2.Power supply: AC 120 V, 60 Hz3.Load imp.: 100 k4.Ambient Temperature: +25 CItemConditionsUnitNominalLimit1. Video Output75 loadVpp1.0 0.12. Coaxial Digital Out75 loadmVpp500 503. Audio (PCM) 3-1. Output Level1 kHz, 0 dBVrms2.0 3-2. S/NdB120 3-3. Freq. Response DVDfs = 48 kHz 0.5 dBHz20 22 k CDfs = 44.1 kHz 0.5 dBHz20 20 k 3-4. THD+N DVD1 kHz, 0 dB%0.0035 CD1 kHz, 0 dB%0.0041-2-1E6NLSPLASER BEAM SAFETY PRECAUTIONSThis DVD player uses a pickup that emits a laser beam.The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keepyour eyes at least 30 cm away from the pickup lens when the diode is turned on. Do not look directly at the laserbeam.CAUTION: Use of controls and adjustments, or doing procedures other than those specified herein, may result inhazardous radiation exposure.Location: Top of DVD mechanism.Do not look directly at the laser beam comingfrom the pickup or allow it to strike against yourskin.rive Mecha AssemblyLaser Beam RadiationLaser PickupTurntableLASER RADIATIONWHEN OPEN. DO NOTSTARE INTO BEAM.CAUTION1-3-1DVDN_ISPIMPORTANT SAFETY PRECAUTIONSProduct Safety NoticeSome electrical and mechanical parts have specialsafety-related characteristics which are often notevident from visual inspection, nor can the protectionthey give necessarily be obtained by replacing themwith components rated for higher voltage, wattage,etc. Parts that have special safety characteristics areidentified by a # on schematics and in parts lists. Useof a substitute replacement that does not have thesame safety characteristics as the recommendedreplacement part might create shock, fire, and/or otherhazards. The Products Safety is under reviewcontinuously and new instructions are issuedwhenever appropriate. Prior to shipment from thefactory, our products are carefully inspected to confirmwith the recognized product safety and electricalcodes of the countries in which they are to be sold.However, in order to maintain such compliance, it isequally important to implement the followingprecautions when a set is being serviced.Precautions during ServicingA. Parts identified by the # symbol are critical forsafety. Replace only with part number specified.B. In addition to safety, other parts and assembliesare specified for conformance with regulationsapplying to spurious radiation. These must also bereplaced only with specified replacements. Examples: RF converters, RF cables, noiseblocking capacitors, and noise blocking filters, etc.C. Use specified internal wiring. Note especially:1) Wires covered with PVC tubing2) Double insulated wires3) High voltage leadsD. Use specified insulating materials for hazardouslive parts. Note especially:1) Insulation tape2) PVC tubing 3) Spacers4) Insulators for transistorsE. When replacing AC primary side components(transformers, power cord, etc.), wrap ends ofwires securely about the terminals beforesoldering.F.Observe that the wires do not contact heatproducing parts (heat sinks, oxide metal filmresistors, fusible resistors, etc.).G. Check that replaced wires do not contact sharpedges or pointed parts.H. When a power cord has been replaced, check that5 - 6 kg of force in any direction will not loosen it.I.Also check areas surrounding repaired locations.J.Be careful that foreign objects (screws, solderdroplets, etc.) do not remain inside the set.K. Crimp type wire connector The power transformer uses crimp typeconnectors which connect the power cord and theprimary side of the transformer. When replacingthe transformer, follow these steps carefully andprecisely to prevent shock hazards.Replacement procedure1) Remove the old connector by cutting the wiresat a point close to the connector. Important: Do not re-use a connector.(Discard it.)2) Strip about 15 mm of the insulation from theends of the wires. If the wires are stranded,twist the strands to avoid frayed conductors.3) Align the lengths of the wires to be connected.Insert the wires fully into the connector.4) Use a crimping tool to crimp the metal sleeve atits center. Be sure to crimp fully to the completeclosure of the tool.L.When connecting or disconnecting the internalconnectors, first, disconnect the AC plug from theAC outlet.1-3-2DVDN_ISPSafety Check after ServicingExamine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts, andwires have been returned to their original positions. Afterwards, do the following tests and confirm the specifiedvalues to verify compliance with safety standards.1. Clearance DistanceWhen replacing primary circuit components, confirmspecified clearance distance (d) and (d) betweensoldered terminals, and between terminals andsurrounding metallic parts. (See Fig. 1)Table 1: Ratings for selected areaNote:This table is unofficial and for reference only. Besure to confirm the precise values.2. Leakage Current TestConfirm the specified (or lower) leakage currentbetween B (earth ground, power cord plug prongs) andexternally exposed accessible parts (RF terminals,antenna terminals, video and audio input and outputterminals, microphone jacks, earphone jacks, etc.) islower than or equal to the specified value in the tablebelow.Measuring Method (Power ON):Insert load Z between B (earth ground, power cord plugprongs) and exposed accessible parts. Use an ACvoltmeter to measure across the terminals of load Z.See Fig. 2 and the following table.Table 2: Leakage current ratings for selected areasNote:This table is unofficial and for reference only. Be sure to confirm the precise values.AC Line VoltageClearance Distance (d), (d)120 V 3.2 mm (0.126 inches)AC Line VoltageLoad ZLeakage Current (i)Earth Ground (B) to:120 V0.15 F CAP. & 1.5 k RES. Connected in paralleli 0.5 mA PeakExposed accessible partsChassis or Secondary ConductorddPrimary Circuit TerminalsFig. 1AC Voltmeter (High Impedance)Exposed Accessible PartBEarth Ground Power Cord Plug ProngsZFig. 21-4-1DVDN_SNSTANDARD NOTES FOR SERVICINGCircuit Board Indications1.The output pin of the 3 pin Regulator ICs isindicated as shown.2.For other ICs, pin 1 and every fifth pin areindicated as shown.3.The 1st pin of every male connector is indicated asshown.Instructions for Connectors1.When you connect or disconnect the FFC (FlexibleFoil Connector) cable, be sure to first disconnectthe AC cord.2.FFC (Flexible Foil Connector) cable should beinserted parallel into the connector, not at anangle.Pb (Lead) Free SolderWhen soldering, be sure to use the Pb free solder.How to Remove / Install Flat Pack-IC1. RemovalWith Hot-Air Flat Pack-IC Desoldering Machine:1.Prepare the hot-air flat pack-IC desolderingmachine, then apply hot air to the Flat Pack-IC(about 5 to 6 seconds). (Fig. S-1-1)2.Remove the flat pack-IC with tweezers whileapplying the hot air.3.Bottom of the flat pack-IC is fixed with glue to theCBA; when removing entire flat pack-IC, first applysoldering iron to center of the flat pack-IC and heatup. Then remove (glue will be melted). (Fig. S-1-6)4.Release the flat pack-IC from the CBA usingtweezers. (Fig. S-1-6)CAUTION:1.The Flat Pack-IC shape may differ by models. Usean appropriate hot-air flat pack-IC desolderingmachine, whose shape matches that of the FlatPack-IC.2.Do not supply hot air to the chip parts around theflat pack-IC for over 6 seconds because damageto the chip parts may occur. Put masking tapearound the flat pack-IC to protect other parts fromdamage. (Fig. S-1-2)Top ViewOutInBottom ViewInput510Pin 1Pin 1FFC CableConnectorCBA* Be careful to avoid a short circuit.Fig. S-1-11-4-2DVDN_SN3.The flat pack-IC on the CBA is affixed with glue, sobe careful not to break or damage the foil of eachpin or the solder lands under the IC whenremoving it.With Soldering Iron:1.Using desoldering braid, remove the solder fromall pins of the flat pack-IC. When you use solderflux which is applied to all pins of the flat pack-IC,you can remove it easily. (Fig. S-1-3)2.Lift each lead of the flat pack-IC upward one byone, using a sharp pin or wire to which solder willnot adhere (iron wire). When heating the pins, usea fine tip soldering iron or a hot air desolderingmachine. (Fig. S-1-4)3.Bottom of the flat pack-IC is fixed with glue to theCBA; when removing entire flat pack-IC, first applysoldering iron to center of the flat pack-IC and heatup. Then remove (glue will be melted). (Fig. S-1-6)4.Release the flat pack-IC from the CBA usingtweezers. (Fig. S-1-6)Hot-airFlat Pack-ICDesolderingMachineCBAFlat Pack-ICTweezersMasking TapeFig. S-1-2Flat Pack-ICDesoldering BraidSoldering IronFig. S-1-3Fine TipSoldering IronSharpPinFig. S-1-41-4-3DVDN_SNWith Iron Wire:1.Using desoldering braid, remove the solder fromall pins of the flat pack-IC. When you use solderflux which is applied to all pins of the flat pack-IC,you can remove it easily. (Fig. S-1-3)2.Affix the wire to a workbench or solid mountingpoint, as shown in Fig. S-1-5.3.While heating the pins using a fine tip solderingiron or hot air blower, pull up the wire as the soldermelts so as to lift the IC leads from the CBAcontact pads as shown in Fig. S-1-5.4.Bottom of the flat pack-IC is fixed with glue to theCBA; when removing entire flat pack-IC, first applysoldering iron to center of the flat pack-IC and heatup. Then remove (glue will be melted). (Fig. S-1-6)5.Release the flat pack-IC from the CBA usingtweezers. (Fig. S-1-6)Note: When using a soldering iron, care must betaken to ensure that the flat pack-IC is notbeing held by glue. When the flat pack-IC isremoved from the CBA, handle it gentlybecause it may be damaged if force is applied.2. Installation1.Using desoldering braid, remove the solder fromthe foil of each pin of the flat pack-IC on the CBAso you can install a replacement flat pack-IC moreeasily.2.The “G” mark on the flat pack-IC indicates pin 1.(See Fig. S-1-7.) Be sure this mark matches the 1on the PCB when positioning for installation. Thenpresolder the four corners of the flat pack-IC. (SeeFig. S-1-8.)3.Solder all pins of the flat pack-IC. Be sure thatnone of the pins have solder bridges.To Solid Mounting PointSoldering IronIron WireorHot Air BlowerFig. S-1-5Fine TipSoldering IronCBAFlat Pack-ICTweezersFig. S-1-6Example :Pin 1 of the Flat Pack-ICis indicated by a mark.Fig. S-1-7PresolderCBAFlat Pack-ICFig. S-1-81-4-4DVDN_SNInstructions for Handling Semi-conductorsElectrostatic breakdown of the semi-conductors mayoccur due to a potential difference caused byelectrostatic charge during unpacking or repair work.1. Ground for Human BodyBe sure to wear a grounding band (1 M) that isproperly grounded to remove any static electricity thatmay be charged on the body.2. Ground for WorkbenchBe sure to place a conductive sheet or copper platewith proper grounding (1 M) on the workbench orother surface, where the semi-conductors are to beplaced. Because the static electricity charge onclothing will not escape through the body groundingband, be careful to avoid cont