Magnavox-DP170MS8-dvd-sm 维修电路原理图.pdf

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1、SERVICE MANUALDVD PLAYERDP170MS8STANDBY-ONPREVNEXTPLAYSTOPOPEN/CLOSERadioFans.CN 收音机爱 好者资料库IMPORTANT SAFETY NOTICEProper service and repair is important to the safe, reliable operation of all Funai Equipment. The service procedures recommended by Funai and described in this service manual are effect

2、ive methods of performing service operations. Some of these service special tools should be used when and as recommended.It is important to note that this service manual contains various CAUTIONS and NOTICES which should be carefully read in order to minimize the risk of personal injury to service p

3、ersonnel. The possibility exists that improper service methods may damage the equipment. It also is important to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. Funai could not possibly know, evaluate and advice the service trade of all conceivable ways in which service might be done

4、or of the possible hazardous consequences of each way. Consequently, Funai has not undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not recommended by Funai must first use all precautions thoroughly so that neither his safety nor the safe op

5、eration of the equipment will be jeopardized by the service method selected.TABLE OF CONTENTSSpecifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1-1Laser Beam Safety Precautions . . . . .

6、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2-1Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3-1Standard Notes for Servicing

7、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4-1Cabinet Disassembly Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5-1How to Initialize

8、the DVD Player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6-1Firmware Renewal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7-1Block

9、 Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8-1Schematic Diagrams / CBAs and Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

10、-9-1Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10-1Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11、. . . . . . . . . . . . . .1-11-1System Control Timing Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12-1IC Pin Function Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12、 . . . . . . . . . . . . . . . . . . .1-13-1Lead Identifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14-1Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15-1Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16-1Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . .

14、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-17-1HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC.Manufactured under license from Dolby Laboratories. “Dolby” and the double-D symb

15、ol are trademarks of Dolby Laboratories.RadioFans.CN 收音机爱 好者资料库1-1-1E6E71SPSPECIFICATIONSNotes:1.All Items are measured without pre-emphasis unless otherwise specified.2.Power supply: AC 120 V, 60 Hz3.Load Impedance: 100 k load (Audio Output)4.Room Ambient: +25 CItemConditionsUnitNominalLimit1. Vide

16、o Output75 loadVpp1.0 0.12. Coaxial Digital Out75 loadmVpp500 503. Audio (PCM) 3-1. Output Level1 kHz, 0 dBVrms1.9 3-2. S/NdB120 3-3. Freq. Response DVDfs = 48 kHz, 20 Hz 22 kHzdB 1.0 CDfs = 44.1 kHz, 20 Hz 20 kHzdB 1.0 3-4. THD+N DVD1 kHz, 0 dB%0.005 CD1 kHz, 0 dB%0.0051-2-1E7NLSPLASER BEAM SAFETY

17、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 keep your eyes at least 30 cm away from the pickup lens when the diode is turned on. Do not look directly at the laser beam.CAUT

18、ION: Use of controls and adjustments, or doing procedures other than those specified herein, may result in hazardous radiation exposure.Location: Top of DVD mechanism.Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin.Drive Mechanism AssemblyLaser B

19、eam RadiationLaser PickupTurntableLASER RADIATIONWHEN OPEN. DO NOTSTARE INTO BEAM.CAUTION1-3-1DVDN_ISPIMPORTANT SAFETY PRECAUTIONSProduct Safety NoticeSome electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection, nor can the prot

20、ection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by a # on schematics and in parts lists. Use of a substitute replacement that does not have the same safety characteristics

21、 as the recommended replacement part might create shock, fire, and/or other hazards. The Products Safety is under review continuously and new instructions are issued whenever appropriate. Prior to shipment from the factory, our products are carefully inspected to confirm with the recognized product

22、safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.Precautions during ServicingA. Parts identified by the # symbol are critical for safet

23、y. Replace only with part number specified.B. In addition to safety, other parts and assemblies are specified for conformance with regulations applying to spurious radiation. These must also be replaced only with specified replacements. Examples: RF converters, RF cables, noise blocking capacitors,

24、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 hazardous live parts. Note especially:1) Insulation tape2) PVC tubing 3) Spacers4) Insulators for

25、transistorsE. When replacing AC primary side components (transformers, power cord, etc.), wrap ends of wires securely about the terminals before soldering.F.Observe that the wires do not contact heat producing parts (heat sinks, oxide metal film resistors, fusible resistors, etc.).G. Check that repl

26、aced wires do not contact sharp edges or pointed parts.H. When a power cord has been replaced, check that 5 - 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, solder droplets, etc.) do not remain inside the

27、 set.K. When connecting or disconnecting the internal connectors, first, disconnect the AC plug from the AC outlet.1-3-2DVDN_ISPSafety Check after ServicingExamine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts, and wires have been returned to thei

28、r original positions. Afterwards, do the following tests and confirm the specified values to verify compliance with safety standards.1. Clearance DistanceWhen replacing primary circuit components, confirm specified clearance distance (d) and (d) between soldered terminals, and between terminals and

29、surrounding metallic parts. (See Fig. 1)Table 1: Ratings for selected areaNote:This table is unofficial and for reference only. Be sure to confirm the precise values.2. Leakage Current TestConfirm the specified (or lower) leakage current between B (earth ground, power cord plug prongs) and externall

30、y exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.) is lower than or equal to the specified value in the table below.Measuring Method (Power ON):Insert load Z between B (earth ground, power cord plug prongs)

31、 and exposed accessible parts. Use an AC voltmeter 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 Dis

32、tance (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 ConductorPrimary Circuit Fig. 1ddAC Voltmeter (High Impedance)Exposed Accessible PartBEart

33、h Ground Power Cord Plug ProngsZFig. 21-4-1DVDN_SNSTANDARD NOTES FOR SERVICINGCircuit Board Indications1.The output pin of the 3 pin Regulator ICs is indicated as shown.2.For other ICs, pin 1 and every fifth pin are indicated as shown.3.The 1st pin of every male connector is indicated as shown.Instr

34、uctions for Connectors1.When you connect or disconnect the FFC (Flexible Foil Connector) cable, be sure to first disconnect the AC cord.2.FFC (Flexible Foil Connector) cable should be inserted parallel into the connector, not at an angle.Pb (Lead) Free SolderWhen soldering, be sure to use the Pb fre

35、e solder.How to Remove / Install Flat Pack-IC1. RemovalWith Hot-Air Flat Pack-IC Desoldering Machine:1.Prepare the hot-air flat pack-IC desoldering machine, 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 while applying the hot air.3

36、.Bottom of the flat pack-IC is fixed with glue to the CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)4.Release the flat pack-IC from the CBA using tweezers. (Fig. S-1-6)CAUTION:1.The Flat Pa

37、ck-IC shape may differ by models. Use an appropriate hot-air flat pack-IC desoldering machine, whose shape matches that of the Flat Pack-IC.2.Do not supply hot air to the chip parts around the flat pack-IC for over 6 seconds because damage to the chip parts may occur. Put masking tape around the fla

38、t pack-IC to protect other parts from damage. (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, so be careful not to break or damage the foil of each pin or the so

39、lder lands under the IC when removing it.With Soldering Iron:1.Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux 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 on

40、e by one, using a sharp pin or wire to which solder will not adhere (iron wire). When heating the pins, use a fine tip soldering iron or a hot air desoldering machine. (Fig. S-1-4)3.Bottom of the flat pack-IC is fixed with glue to the CBA; when removing entire flat pack-IC, first apply soldering iro

41、n to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)4.Release the flat pack-IC from the CBA using tweezers. (Fig. S-1-6)Hot-airFlat Pack-ICDesolderingMachineCBAFlat Pack-ICTweezersMasking TapeFig. S-1-2Flat Pack-ICDesoldering BraidSoldering IronFig. S-1-3Fine

42、TipSoldering IronSharpPinFig. S-1-41-4-3DVDN_SNWith Iron Wire:1.Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux 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 moun

43、ting point, as shown in Fig. S-1-5.3.While heating the pins using a fine tip soldering iron or hot air blower, pull up the wire as the solder melts so as to lift the IC leads from the CBA contact pads as shown in Fig. S-1-5.4.Bottom of the flat pack-IC is fixed with glue to the CBA; when removing en

44、tire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)5.Release the flat pack-IC from the CBA using tweezers. (Fig. S-1-6)Note: When using a soldering iron, care must be taken to ensure that the flat pack-IC is not bei

45、ng held by glue. When the flat pack-IC is removed from the CBA, handle it gently because it may be damaged if force is applied.2. Installation1.Using desoldering braid, remove the solder from the foil of each pin of the flat pack-IC on the CBA so you can install a replacement flat pack-IC more easil

46、y.2.The “” mark on the flat pack-IC indicates pin 1. (See Fig. S-1-7.) Be sure this mark matches the 1 on the PCB when positioning for installation. Then presolder the four corners of the flat pack-IC. (See Fig. S-1-8.)3.Solder all pins of the flat pack-IC. Be sure that none of the pins have solder

47、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-conductorsElectrostat

48、ic breakdown of the semi-conductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work.1. Ground for Human BodyBe sure to wear a grounding band (1 M) that is properly grounded to remove any static electricity that may be charged on the body.2. Grou

49、nd for WorkbenchBe sure to place a conductive sheet or copper plate with proper grounding (1 M) on the workbench or other surface, where the semi-conductors are to be placed. Because the static electricity charge on clothing will not escape through the body grounding band, be careful to avoid contac

50、ting semi-conductors with your clothing.CBAGrounding BandConductive Sheet orCopper Plate1M1MCBA1-5-1E6E71DCCABINET DISASSEMBLY INSTRUCTIONS1. Disassembly FlowchartThis flowchart indicates the disassembly steps to gainaccess to item(s) to be serviced. When reassembling,follow the steps in reverse ord