Hitachi-DVP415U-cd-sm 维修电路原理图.pdf

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1、TK No.9103ESPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENTDVD PLAYERSERVICE MANUAL2001MarchDigital Media Products Division, TokaiDV-P415U 1. Precautions 2. Product Specifications 3. Operating Instructions 4. Disassembly and Reassembly 5. Troubleshooting 6. Exploded Views 7. Replacemen

2、t Parts List 8. Block Diagrams 9. PCB Diagrams10. Wiring Diagram11. Schematic DiagramCONTENTSRadioFans.CN 收音机爱 好者资料库1-11. Precautions1-1 Safety Precautions1) Before returning an instrument to the customer,always make a safety check of the entireinstrument, including, but not limited to, thefollowing

3、 items:(1) Be sure that no built-in protective devices aredefective or have been defeated during servicing.(1)Protective shields are provided to protect boththe technician and the customer. Correctly replaceall missing protective shields, including anyremove for servicing convenience.(2)When reinsta

4、lling the chassis and/or other as-sembly in the cabinet, be sure to put back in placeall protective devices, including, but not limited to,nonmetallic control knobs, insulating fish papers,adjustment and compartment covers/shields, andisolation resistor/capacitor networks. Do notoperate this instrum

5、ent or permit it to be operatedwithout all protective devices correctly installedand functioning.(2) Be sure that there are no cabinet openingsthrough which adults or children might be able toinsert their fingers and contact a hazardousvoltage. Such openings include, but are not limitedto, excessive

6、ly wide cabinet ventilation slots, andan improperly fitted and/or incorrectly securedcabinet back cover.(3) Leakage Current Hot Check-With the instrumentcompletely reassembled, plug the AC line corddirectly into a 120V AC outlet. (Do not use aisolation transformer during this test.) Use aleakage cur

7、rent tester or a metering system thatcomplies with American National Standardsinstitute (ANSI) C101.1 Leakage Current forAppliances and Underwriters Laboratories (UL)1270 (40.7).With the instruments AC switch first inthe ON position and then in the OFF position,measure from a known earth ground (met

8、al waterpipe, conduit, etc.) to all exposed metal parts ofthe instrument (antennas, handle brackets, metalcabinets, screwheads, metallic overlays, controlshafts, etc.), especially any exposed metal partsthat offer an electrical return path to the chassis.Any current measured must not exceed 0.5mA.Re

9、verse the instrument power cord plug in theoutlet and repeat the test. See Fig. 1-1.Any measurements not within the limits specifiedherein indicate a potential shock hazard that mustbe eliminated before returning the instrument tothe customer.Fig. 1-1 AC Leakage Test(4) Insulation Resistance Test Co

10、ld Check-(1) Unplugthe power supply cord and connect a jumper wirebetween the two prongs of the plug. (2) Turn on thepower switch of the instrument. (3) Measure theresistance with an ohmmeter between thejumpered AC plug and all exposed metallic cabinetparts on the instrument, such as screwheads,ante

11、nna, control shafts, handle brackets, etc.When an exposed metallic part has a return pathto the chassis, the reading should be between 1and 5.2 megohm. When there is no return path tothe chassis, the reading must be infinite. If thereading is not within the limits specified, there isthe possibility

12、of a shock hazard, and theinstrument must be re-pared and rechecked beforeit is returned to the customer. See Fig. 1-2.Fig. 1-2 Insulation Resistance TestDEVICEUNDERTEST(READING SHOULDNOT BE ABOVE0.5mA)LEAKAGECURRENTTESTEREARTHGROUNDTEST ALLEXPOSED METERSURFACESALSO TEST WITHPLUG REVERSED(USING AC A

13、DAPTERPLUG AS REQUIRED)2-WIRE CORDAntennaTerminalExposedMelal PartohmohmmeterRadioFans.CN 收音机爱 好者资料库Precautions1-22) Read and comply with all caution and safety re-lated notes non or inside the cabinet, or on thechassis.3) Design Alteration Warning-Do not alter of add tothe mechanical or electrical

14、design of thisinstrument. Design alterations and additions,including but not limited to, circuit modifications andthe addition of items such as auxiliary audio outputconnections, might alter the safety characteristicsof this instrument and create a hazard to the user.Any design alterations or additi

15、ons will make you,the service, responsible for personal injury orproperty damage resulting therefrom.4) Observe original lead dress. Take extra care toassure correct lead dress in the following areas:(1) near sharp edges, (2) near thermally hot parts(be sure that leads and components do not touchthe

16、rmally hot parts), (3) the AC supply, (4) highvoltage, and (5) antenna wiring. Always inspect inall areas for pinched, out-of-place, or frayed wiring,Do not change spacing between a component andthe printed-circuit board. Check the AC power cordfor damage.5) Components, parts, and/or wiring that app

17、ear tohave overheated or that are otherwise damagedshould be replaced with components, parts and/ orwiring that meet original specifications.Additionally, determine the cause of overheatingand/or damage and, if necessary, take correctiveaction to remove any potential safety hazard.6) Product Safety

18、Notice-Some electrical andmechanical parts have special safety-relatedcharacteristics which are often not evident fromvisual inspection, nor can the protection they givenecessarily be obtained by replacing them withcomponents rated for higher voltage, wattage, etc.Parts that have special safety char

19、acteristics areidentified by shading, an ( )or a ( )onschematics and parts lists. Use of a substitutereplacement that does not have the same safetycharacteristics as the recommended replacementpart might created shock, fire and/or other hazards.Product safety is under review continuously andnew inst

20、ructions are issued whenever appropriate.Precautions1-31-2 Servicing PrecautionsCAUTION : Before servicing Instruments coveredby this service manual and its supplements, read andfollow the Safety Precautions section of this manual.Note : If unforseen circument create conflict betweenthe following se

21、rvicing precautions and any of thesafety precautions, always follow the safetyprecautions. Remember: Safety First.1-2-1 General Servicing Precautions(1) a. Always unplug the instruments AC power cordfrom the AC power source before (1) re-movingor reinstalling any component, circuit board,module or a

22、ny other instrument assembly, (2)disconnecting any instrument electrical plug orother electrical connection, (3) connecting a testsubstitute in parallel with an electrolyticcapacitor in the instrument.b. Do not defeat any plug/socket B+ voltageinterlocks with which instruments covered by thisservice

23、 manual might be equipped.c. Do not apply AC power to this instrument and/or any of its electrical assemblies unless allsolid-state device heat sinks are correctly in-stalled.d. Always connect a test instruments ground leadto the instrument chassis ground beforeconnecting the test instrument positiv

24、e lead.Always remove the test instrument ground leadlast.Note : Refer to the Safety Precautions section groundlead last.(2) The service precautions are indicated or printedon the cabinet, chassis or components. Whenservicing, follow the printed or indicated serviceprecautions and service materials.(

25、3) The components used in the unit have a specifiedflame resistance and dielectric strength.When replacing components, use componentswhich have the same ratings. Components i-entified by shading, by( ) or by ( ) in the circuitdiagram are important for safety or for thecharacteristics of the unit. Al

26、ways replace themwith the exact replacement components.(4) An insulation tube or tape is sometimes used andsome components are raised above the printedwiring board for safety. The internal wiring issometimes clamped to prevent contact withheating components. Install such elements as theywere.(5) Aft

27、er servicing, always check that the removedscrews, components, and wiring have been in-stalled correctly and that the portion around theserviced part has not been damaged and so on.Further, check the insulation between the bladesof the attachment plug and accessible conductiveparts.1-2-2 Insulation

28、Checking ProcedureDisconnect the attachment plug from the AC outletand turn the power ON. Connect the insulation resi-stance meter (500V) to the blades of the attachmentplug. The insulation resistance between each blade ofthe attachment plug and accessible conductiveparts(see note) should be more th

29、an 1 Megohm.Note : Accessible conductive parts include metalpanels, input terminals, earphone jacks, etc.Precautions1-41-3 ESD PrecautionsElectrostatically Sensitive Devices (ESD)Some semiconductor (solid state) devices can bedamaged easily by static electricity.Such components commonly are called E

30、lectrostati-cally Sensitive Devices(ESD). Examples of typicalESD devices are integrated circuits and some field-effect transistors and semiconductor chipcomponents.The following techniques should be usedto help reduce the incidence of component damagecaused by static electricity.(1) Immediately befo

31、re handling any semiconductorcomponent or semiconductor-equipped assembly,drain off any electrostatic charge on your body bytouching a known earth ground. Alternatively,obtain and wear a commercially availabledischarging wrist strap device, which should beremoved for potential shock reasons prior to

32、applying power to the unit under test.(2) After removing an electrical assembly equippedwith ESD devices, place the assembly on aconductive surface such as aluminum foil, toprevent electrostatic charge buildup or exposure ofthe assembly.(3) Use only a grounded-tip soldering iron to solder orunsolder

33、 ESD devices.(4) Use only an anti-static solder removal devices.Some solder removal devices not classified asanti-static can generate electrical chargessufficient to damage ESD devices.(5) Do not use freon-propelled chemicals. These cangenerate electrical charges sufficient to damageESD devices.(6)

34、Do not remove a replacement ESD device from itsprotective package until immediately before yourare ready to install it.(Most replacement ESDdevices are packaged with leads electricallyshorted together by conductive foam, aluminumfoil or comparable conductive materials).(7) Immediately before removin

35、g the protective ma-terials from the leads of a replacement ESDdevice, touch the protective material to the chassisor circuit assembly into which the device will beinstalled.CAUTION : Be sure no power is applied to the ch-assis or circuit, and observe all other safetyprecautions.(8) Minimize bodily

36、motions when handlingunpackaged replacement ESD devices. (Otherwiseharmless motion such as the brushing together ofyour clothes fabric or the lifting of your foot from acarpeted floor can generate static electricitysufficient to damage an ESD device).Precautions1-51-4 Handling the optical pick-upThe

37、 laser diode in the optical pick up may sufferelectrostatic breakdown because of potential staticelectricity from clothing and your body.The following method is recommended.(1) Place a conductive sheet on the work bench (Theblack sheet used for wrapping repair parts.)(2) Place the set on the conduct

38、ive sheet so that thechassis is grounded to the sheet.(3) Place your hands on the conductive sheet(Thisgives them the same ground as the sheet.)(4) Remove the optical pick up block(5) Perform work on top of the conductive sheet. Becareful not to let your clothes or any other staticsources to touch t

39、he unit. Be sure to put on a wrist strap grounded to the sheet. Be sure to lay a conductive sheet made of copper etc.Which is grounded to the table.Fig.1-3(6) Short the short terminal on the PCB, which is in-side the Pick-Up ASSY, before replacing the Pick-Up. (The short terminal is shorted when the

40、 Pick-Up Assy is being lifted or moved.)(7) After replacing the Pick-up, open the shortterminal on the PCB.THE UNITWRIST-STRAPFOR GROUNDING1M1MCONDUCTIVE SHEETPrecautions1-61-5-1 Disassembly1) Remove the power code.2) Disassemble the Deck-Assy.3) Solder land 4 points short on Pick-up.(See Fig. 1-4)

41、4) Disassembly the Pick-up.1-5-2 Assembly1) Replace the Pick-up.2) Remove the soldering 4 points on Pick-up.3) Reassemble the Deck-Assy.PICK-UP ASSYCDDVDSOLDER LAND 4 POINTS SHORTNote : If the assembly and disassembly are not done in correct sequence, the Pick-up may be damaged.Fig. 1-41-5 Pick-up d

42、isassembly and reassembly2-12. Product SpecificationsPower RequirementsAC 120V, 60HzPower Consumption15WGENERALWeight2.7kgDimensionsW 430mm X D 240mm X H 79mmOperating Temperature Range+5C +35COperating Humidity Range10% to 75%DVDReading Speed : 3.49 m/s(Digital Versatile Disc)Approx. Play Time (Sin

43、gle Sided, Single Layer Disc) : 135 min.CD : 12CmReading Speed : 1.2 to 1.4 m/sDISC(Compact Disc)Maximum Play Time : 74min.CD : 8CmReading Speed : 1.2 to 1.4 m/s(Compact Disc)Maximum Play Time : 20min.VCD : 12CmReading Speed : 1.2 to 1.4 m/sMaximum Play Time : 74min. (Video + Audio)Composite Video1

44、channel : 1.0Vp-p (75ohm load)Y : 1.0Vp-p (75ohm load) Video OutputComponent VideoPr : 0.70Vp-p (75ohm load)Pb : 0.70Vp-p (75ohm load)S-VideoLuminance Signal : 1Vp-p (75ohm load)Chrominance Signal : 0.286Vp-p (75ohm load)2 ChannelL (1/L), R (2/R)* Frequency Response48kHz Sampling : 4Hz to 22kHzAudio

45、 Output96kHz Sampling : 4Hz to 44kHz* S/N Ratio110dB* Dynamic Range100dB* Total Harmonic Distortion0.004%* : Nominal specification3-13. Operating Instructions14POWER/STANDBYWhen the unit is first plugged in, the indicator lights. When POWER/STANDBYispressed, the lamp goes out and the player is turne

46、d on.DISC TRAYPress OPEN/CLOSE to open and close the disc tray.DISPLAY Operation indicators are displayed here.OPEN/CLOSE Press to open and close the disc tray.(PLAY/PAUSE) Begin or pause disc play.(STOP) Stops disc play.(SKIP/SEARCH) Use to skip a scene or music. If this button is held down for app

47、rox. two seconds, it will switch to the search button:Thereafter, each time the button is pressed, the search speed will switch to 2X, 4X,8X, 16X, 32X, 128X, after which SKIP will be restored.Description-Front PanelFront Panel ControlsPOWER/STANDBY15You can now select different viewing points of the

48、 scene recorded by differentcameras (Multi Angle).Disc type indicatorsReverse playback / Pause / Forward playbackLights when 3D sound is turned on.DVD : Title number DVD : Chapter number. Video/Audio CD : Track numberRepeat play modeLinear PCM audio outputDolby Digital audio outputDTS (Digital Theat

49、er System) audio output(Digital only)MPEG-2 Audio outputDisplays various messages concerning operations such as PLAY, STOP, LOAD,RANDOM, .no DISC : No disc loaded.OPEN : The disc tray is open.LOAD : Player is loading disc information.Front Panel DisplayFront Panel Display”Operating Instructions3-2Ho

50、w to handle the remote control16Tour of the Remote Control Operate the remote control within the following area, in a straight line from the signaldetecting eye of the player and an angle of 30 .30Aprox.7metros303030DV-RM41017POWER/STANDBY Button Turns the player on and off.A-B REPEAT Button Marks a