Hitachi-DVP725U-cd-sm 维修电路原理图.pdf

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1、SERVICE MANUALSERVICE MANUALDVD PLAYERDVD PLAYERSPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENTTKNo. 9205ETKNo. 9205EDV-P725UDV-P725U2002REVMENUTOP MENUOPEN / CLOSEPHONES LEVELPHONESMINMAXFWDPOWER / STANDBYDigital Media Division, TokaiAprilRadioFans.CN 收音机爱 好者资料库parts updated 6/12/03C

2、ONTENTS SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1-1COMPARISON OF MODELS . . . . . . . . . . . . . . . . . . . .1-2-1LASER BEAM SAFETY PRECAUTIONS. . . . . . . . . . . 1-3-1IMPORTANT SAFETY PRECAUTIONS. . . . . . . . . . . .1-4-1Product Safety Notice . . . . . . . . .

3、 . . . . . . . . . . . . . . . . 1-4-1Precautions during Servicing. . . . . . . . . . . . . . . . . . . . 1-4-1Safety Check after Servicing. . . . . . . . . . . . . . . . . . . . 1-4-2STANDARD NOTES FOR SERVICING . . . . . . . . . . . . 1-5-1Circuit Board Indications . . . . . . . . . . . . . . . .

4、. . . . . . . 1-5-1Instructions for Connectors . . . . . . . . . . . . . . . . . . . . . 1-5-1How to Remove/Install Flat Pack-IC . . . . . . . . . . . . . . 1-5-1Instructions for Handling Semi-conductors . . . . . . . . . 1-5-3ORERATING CONTROLS AND FUNCTIONS . . . . . . . 1-6-1FIRMWARE RENEWAL MODE

5、 . . . . . . . . . . . . . . . . . . 1-7-1TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 1-8-1CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . 2-1-11. Disassembly Flowchart . . . . . . . . . . . . . . . . . . . . . . 2-1-12. Disassembly Method. . . . . . . . . . . . . . . . . . .

6、. . . . . 2-1-1EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1-1Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1-1REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . 3-2-1Mechanical Parts List . . . . . . . . . . . . . . . . . . .

7、. . . . . . 3-2-1Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2-2SCHEMATIC DIAGRAMS/CBAS ANDTEST POINTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-1Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-3DVD Main 1/4 Sche

8、matic Diagram . . . . . . . . . . . . . . . 4-1-4DVD Main 2/4 Schematic Diagram . . . . . . . . . . . . . . . 4-1-5DVD Main 3/4 Schematic Diagram . . . . . . . . . . . . . . . 4-1-6DVD Main 4/4 Schematic Diagram . . . . . . . . . . . . . . . 4-1-7AV 1/3 Schematic Diagram. . . . . . . . . . . . . . .

9、 . . . . . . 4-1-8AV 2/3 & Headphone Schematic Diagram . . . . . . . . . 4-1-9Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-10AV 3/3, Function & Switch Schematic Diagram . . . . 4-1-11Progressive Schematic Diagram. . . . . . . . . . . . . . . . 4-1-12Function CBA Top

10、View . . . . . . . . . . . . . . . . . . . . . . 4-1-13Function CBA Bottom View. . . . . . . . . . . . . . . . . . . . 4-1-13Headphone CBA Top View . . . . . . . . . . . . . . . . . . . . 4-1-13Headphone CBA Bottom View . . . . . . . . . . . . . . . . . 4-1-13AV CBA Top View. . . . . . . . . . . . .

11、 . . . . . . . . . . . . . . 4-1-14AV CBA Bottom View . . . . . . . . . . . . . . . . . . . . . . . . 4-1-15Switch CBA Top View . . . . . . . . . . . . . . . . . . . . . . . . 4-1-15Switch CBA Bottom View . . . . . . . . . . . . . . . . . . . . . 4-1-15BLOCK DIAGRAMS . . . . . . . . . . . . . . . .

12、. . . . . . . . . . . 4-2-1System Control Block Diagram . . . . . . . . . . . . . . . . . . 4-2-1RF Signal Process/Servo Block Diagram . . . . . . . . . . 4-2-2DVD Signal Process Block Diagram . . . . . . . . . . . . . . 4-2-3Video Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

13、-4Progressive Block Diagram. . . . . . . . . . . . . . . . . . . . . 4-2-5Audio Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . 4-2-6Power Supply Block Diagram . . . . . . . . . . . . . . . . . . . 4-2-7SYSTEM CONTROL TIMING CHARTS . . . . . . . . . . . . 4-3-1IC PIN FUNCTION DESCRI

14、PTIONS . . . . . . . . . . . . . . 4-4-1LEAD IDENTIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . 4-5-1CHAPTER 1GENERAL INFORMATIONCHAPTER 2DISASSEMBLY CHAPTER 3EXPLODED VIEWS AND PARTS LISTCHAPTER 4SCHEMATIC AND BLOCK DIAGRAMS/CBASRadioFans.CN 收音机爱 好者资料库1-1-1Product type :DVD PlayerDiscs :D

15、VD videoAudio CDVideo CDOutput signal format :NTSC colorFrequency responseDVD (linear sound) :20 Hz to 22 kHz (sample rate: 48 kHz)20 Hz to 44 kHz (sample rate: 96 kHz)CD :20 Hz to 20 kHzSignal-to-noise ratio (S/N ratio)CD :110 dB (EIAJ)Dynamic rangeDVD (linear sound) : 95 dBCD : 94 dB (EIAJ)Total d

16、istortion factorCD : 0.005% (EIAJ)Wow and flutter :Below the measurement limitation (+/-0.001% W PEAK) (EIAJ)ConnectionsS-Video output :Mini DIN 4-pin jack (75 ohm)Video output :One RCA connector, 1 Vpp (75 ohm)Coaxial digital audio output : One pin jack, 500mVpp (75 ohm)Analog audio output :Two RCA

17、 connectors (one left channel, one right channel) 2 Vrms (47 k ohm)Component video output :One pin jack (Y), 1 Vpp (75 ohm) Two pin jacks (CB/PB)/(CR/PR), 700mVpp (75 ohm)Optical digital audio output : Optical connectorPower source :120 V AC +/- 10%, 60 Hz +/- 0.5%Power consumption :17 W (standby: 2

18、.2W)Operating temperature :5C to 40CDimensions :W 17-1/8” (435mm)H 2-15/16” (75mm)D 8-1/2” (216mm)Weight :4.63 lbs (2.2kg)Designs and specifications are subject to change without notice.SPECIFICATIONSManufactured under license from Dolby Laboratories. Dolby and the double-D symbol are trademarks of

19、Dolby Laboratories. Confidential Unpublished Works.(1992-1997 Dolby Laboratories, Inc. All rights reserved.)DTS and DTS Digital Out are trademarks of Digital Theater Systems Inc.CHAPTER 1GENERAL INFORMATION1-2-1COMPARISON OF MODELS : Same as on leftDV-P725UDV-P315U/P313UAppearanceDimensional435(W) x

20、 75(H) x 216(D) mm430(W) x 79(H) x 240(D) mmWeight2.1kg4.2kgTray PanelSilverBlackColor Front / ButtonDark Silver/SilverBlack/BlackHot StampO-Ultra Vision BadgeO-GeneralDrive Speed1xLaser21DVD/VCD/SVCD/CD-DA (Video Format)O / O / - / OO / O / O / OCD-R/CD-RW/DVD-R (VR Format)O / O / O- / - / - DVD-RA

21、M- MP3O-OSD languages3 (English, French, Spanish)6 (English, French, Spanish, Italian, German, Dutch)Jog Shuttle on FrontOnly switch Shuttle-Headphone Jack / VolumeO / O- / -VideoPAL Disc NTSC Out-Video Out Mode NTSC/PAL/PAL60O / - / -S-Video / Component / CompositeO / O / OVideo D/A Converter10bitB

22、lack Level SelectOPicture Control-Progressive OutO-AudioAudio D/A Converter192kHz / 24bit96kHz / 24bitDigital Audio Out Optical / CoaxialO / ODolby Digital 5.1 ch Decode-DTS Digital OutOVirtual SurroundODynamic Range Compression (Dolby Digital)ODVD Audio-Power on sound-Trick PlaySearch Speed (DVD: 2

23、, 8 ,30 ,60 / VCD: 2, 8, 30 / CD: 16)2 to 60 (FORWARD/REWIND)2 to 128 (FORWARD/REWIND)Slow Speed1/16, 1/8, 1/2 (FORWARD only)1/8, 1/4, 1/2 (FORWARD only)IP Search (Smooth 2x Play)O2x Play with Audio-Step Forward / ReverseO / -Still Picture Select (Frame/Field)Auto Only O1-2-2FeaturesDisc Navigation-

24、O (DV-P315U)- (DV-P313U)DVD Zoom x2 / x4 / x16O / O / -Program and Random Play of DVD / VCD-O / OA-B RepeatORepeatOLast PlayOClosed Caption for NTSC DVDOFront Panel Display DimmerOScreen SaverOAuto Power OffORemote ControllerJog Shuttle on Remote-TV ControlO-AccessoryRemote ControllerOBatteryOAV Cab

25、leOS Cable-AC Socket-Warranty CardO1-3-1Drive Mecha AssemblyLaser Beam RadiationLaser PickupTurntableLASER RADIATIONWHEN OPEN. DO NOTSTARE INTO BEAM.CAUTIONLASER BEAM SAFETY PRECAUTIONSThis DVD player uses a pickup that emits a laser beam.The laser beam is emitted from the location shown in the figu

26、re. When checking the laser diode, be sure to keepyour eyes at least 30cm 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 exp

27、osure.Do not look directly at the laser beam comingfrom the pickup or allow it to strike againstyour skin.Location: Inside Top of DVD mechanism.1-4-1IMPORTANT SAFETY PRECAUTIONSProduct Safety NoticeSome electrical and mechanical parts have specialsafety-related characteristics which are often not ev

28、i-dent 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 doe

29、s not have thesame safety characteristics as the recommendedreplacement part might create shock, fire, and/or otherhazards. The Products Safety is under review contin-uously and new instructions are issued wheneverappropriate. Prior to shipment from the factory, ourproducts are carefully inspected t

30、o confirm with therecognized product safety and electrical codes of thecountries in which they are to be sold. However, inorder to maintain such compliance, it is equally impor-tant to implement the following precautions when a setis being serviced.Precautions during ServicingA. Parts identified by

31、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 cable

32、s, noise block-ing 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)S

33、pacers4)Insulators for transistorsE. When replacing AC primary side components(transformers, power cord, etc.), wrap ends ofwires securely about the terminals before solder-ing.F. Observe that the wires do not contact heat produc-ing parts (heatsinks, oxide metal film resistors, fus-ible resistors,

34、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

35、 not remain inside the set.K. Crimp type wire connectorThe power transformer uses crimp type connectorswhich connect the power cord and the primary sideof the transformer. When replacing the transformer,follow these steps carefully and precisely to pre-vent shock hazards.Replacement procedure1)Remov

36、e the old connector by cutting the wires at apoint close to the connector.Important: Do not re-use a connector. (Discard it.)2)Strip about 15 mm of the insulation from the endsof the wires. If the wires are stranded, twist thestrands to avoid frayed conductors.3)Align the lengths of the wires to be

37、connected.Insert the wires fully into the connector.4)Use a crimping tool to crimp the metal sleeve at itscenter. Be sure to crimp fully to the complete clo-sure of the tool.L. When connecting or disconnecting the internal con-nectors, first, disconnect the AC plug from the ACoutlet.1-4-2Chassis or

38、Secondary ConductorddPrimary Circuit TerminalsAC Voltmeter(High Impedance)Exposed Accessible PartBEarth Ground Power Cord Plug ProngsZ1.5k0.15 FSafety Check after ServicingExamine the area surrounding the repaired location fordamage or deterioration. Observe that screws, parts,and wires have been re

39、turned to their original posi-tions. Afterwards, do the following tests and confirmthe specified values to verify compliance with safetystandards.1. Clearance DistanceWhen replacing primary circuit components, confirmspecified clearance distance (d) and (d) between sol-dered terminals, and between t

40、erminals and surround-ing 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 currentbetween B (earth ground, power cord plug prongs

41、)and externally exposed accessible parts (RF termi-nals, antenna terminals, video and audio input andoutput terminals, microphone jacks, earphone jacks,etc.) is lower than or equal to the specified value in thetable below. Measuring Method (Power ON) :Insert load Z between B (earth ground, power cor

42、dplug prongs) and exposed accessible parts. Use anAC voltmeter to measure across the terminals of loadZ. See Fig. 2 and the following table.AC Line VoltageClearance Distance (d) (d)120 V 3.2mm (0.126 inches)Table 2: Leakage current ratings for selected areasNote: This table is unofficial and for ref

43、erence only. Be sure to confirm the precise values.AC Line VoltageLoad ZLeakage Current (i)Earth Ground (B) to:120 V0.15F CAP. & 1.5k RES. Connected in paralleli0.5mA PeakExposed accessible partsFig. 1Fig. 21-5-1STANDARD NOTES FOR SERVICINGCircuit Board Indicationsa. The output pin of the 3 pin Regu

44、lator ICs is indi-cated as shown.b. For other ICs, pin 1 and every fifth pin are indicatedas shown.c. 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

45、. FFC (Flexible Foil Connector) cable should beinserted parallel into the connector, not at an angle.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

46、 6 seconds). (Fig. S-1-1)(2) Remove the flat pack-IC with tweezers while apply-ing 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.

47、S-1-6)(1) Release the flat pack-IC from the CBA using twee-zers. (Fig. S-1-6)Caution:1. Do not supply hot air to the chip parts around theflat pack-IC for over 6 seconds because damage tothe chip parts may occur. Put masking tape aroundthe flat pack-IC to protect other parts from damage.(Fig. S-1-2)

48、2. 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 when removingit.Top ViewOutInBottom ViewInput510Pin 1Pin 1FFC CableConnectorCBA* Be careful to avoid a short circuit.Fig. S-1-1Hot-airFlat Pack-ICDesolderingM

49、achineCBAFlat Pack-ICTweezersMasking TapeFig. S-1-21-5-2With Soldering Iron:(1)Using desoldering braid, remove the solder from allpins of the flat pack-IC. When you use solder fluxwhich is applied to all pins of the flat pack-IC, youcan remove it easily. (Fig. S-1-3)(2)Lift each lead of the flat pac

50、k-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 applysold