Hitachi-DVP325U-cd-sm 维修电路原理图.pdf

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1、SERVICE MANUALSERVICE MANUALDigital Media Products Division, TokaiDVD PLAYERDVD PLAYERSPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENTTKNo. 9202ETKNo. 9202EDV-P325UDV-P325UDV-P323UDV-P323UFebruary2002REVSURROUNDAUDIOSUB TITLEOPEN / CLOSEFWDPOWER / STANDBYRadioFans.CN 收音机爱 好者资料库CONTENTS

2、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 FUNCTIO

5、NS . . . . . . . . . .1-6-1CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . . . .1-7-11. Disassembly Flowchart . . . . . . . . . . . . . . . . . . . . . . . .1-7-12. Disassembly Method . . . . . . . . . . . . . . . . . . . . . . . . . .1-7-1ROM RENEWAL MODE . . . . . . . . . . . . . . . . . . . . .

6、. . . . . .1-8-1TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9-1BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10-1System Control Block Diagram . . . . . . . . . . . . . . . . . . .1-10-1RF Signal Process/Servo Block Diagram . . . . . . . . . .

7、.1-10-2DVD Signal Process Block Diagram . . . . . . . . . . . . . . .1-10-3Video Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10-4Audio Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10-5Power Supply Block Diagram . . . . . . . . . . . . . . . . . . . .1

8、-10-6SCHEMATIC DIAGRAMS/CBAS ANDTEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11-1DVD Main 1/4 Schematic Diagram . . . . . . . . . . . . . . . .1-11-3DVD Main 2/4 Schematic Diagram . . . . . . . . . . . . . . . .1-11-4DVD Main 3/4 Schematic Diagram . . . . . . . . . . . .

9、. . . .1-11-5DVD Main 4/4 Schematic Diagram . . . . . . . . . . . . . . . .1-11-6AV 1/3 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . .1-11-7AV 2/3 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . .1-11-8AV 3/3, Function & Switch Schematic Diagram. . . . . .1-11-10AV CBA Top

10、 View . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11-11AV CBA Bottom View. . . . . . . . . . . . . . . . . . . . . . . . . .1-11-12Function CBA Top View. . . . . . . . . . . . . . . . . . . . . . . .1-11-13Function CBA Bottom View . . . . . . . . . . . . . . . . . . . . .1-11-13Switch C

11、BA Top View . . . . . . . . . . . . . . . . . . . . . . . . .1-11-13Switch CBA Bottom View. . . . . . . . . . . . . . . . . . . . . . .1-11-13WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11-9WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

12、-12-1SYSTEM CONTROL TIMING CHARTS . . . . . . . . . . . . . .1-13-1IC PIN FUNCTION DESCRIPTIONS. . . . . . . . . . . . . . . . .1-14-1LEAD IDENTIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . .1-15-1EXPLODED VIEWS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16-1MECHANICAL P

13、ARTS LIST. . . . . . . . . . . . . . . . . . . . . . .1-17-1ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . .1-18-1RadioFans.CN 收音机爱 好者资料库1-1-1SPECIFICATIONSManufatured under license from Dolby Laboratories. Dolby and the double-D symbol are trademarks of Dolby Laboratories. Confid

14、ential Unpublished Works.(1992-1997 Dolby Laboratories, Inc. All rights reserved.)DTS and DTS Digital Out are trademarks of Digital Theater Systems Inc.1-2-1COMPARISON OF MODELS : Same as on leftDV-P315U/P313UDV-P325U/323UAppearanceDimensional430(W) x 240(H) x 79(D) mm435(W) x 216(H) x 75(D) mmWeigh

15、t4.2kg2.1kgTray PanelBlackSilverColor Front / ButtonBlack/BlackBlack/Silver (DV-P325U)Silver/Silver (DV-P323U)Hot Stamp-Ultra Vision Badge-GeneralDrive Speed1xLaser12DVD/VCD/SVCD/CD-DAO / O / O / OO / O / - / OCD-R/CD-RW/DVD-R- / - / - O / O / ODVD-RAM- JPEG Play back-MP3-OOSD languages6 (English, F

16、rench, Spanish, Italian, German, Dutch)3 (English, French, Spanish)Jog Shuttle on Front-Only switch ShuttleHeadphone Jack / Volume- / -AC Power PlugFlat 2p(U)VideoPAL Disc NTSC Out-Video Out Mode NTSC/PAL/PAL60O / - / -S-Video / Component / CompositeO / O / OVideo D/A Converter10bitBlack Level Selec

17、tOPicture Control-Progressive Out-AudioAudio D/A Converter96kHz / 24bit192kHz / 24bitDigital Audio Out Optical / CoaxialO / OO / O (DV-P325U)- / O (DV-P323U)Dolby Digital 5.1 ch Decode-DTS Digital OutOVirtual SurroundOO (DV-P325U)- (DV-P323U)Dynamic Range Compression (Dolby Digital)ODVD Audio-Power

18、on sound-Trick PlaySearch Speed2 to 128 (F/R)2 to 60 (F/R)Slow Speed1/8, 1/4, 1/2 (F only)1/16, 1/8, 1/2 (F only)IP Search (Smooth 2x Play)O2x Play with Audio-Step Forward / ReverseO / -Still Picture Select (Frame/Field)OAuto Only 1-2-2FeaturesDisc NavigationO (DV-P315U)- (DV-P313U)-DVD Zoom x2 / x4

19、 / x16O / O / -Program and Random Play of DVD / VCDO / O-A-B RepeatORepeatOLast PlayOClosed Caption for NTSC DVDOFront Panel Display DimmerOScreen SaverOAuto Power OffORemote ControllerJog Shuttle on Remote-TV Control-OAccessoryRemote ControllerOBatteryOAV CableOS Cable-AC Socket-Warranty CardO1-3-1

20、Drive 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 figure. When checking the laser diode, be su

21、re 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 exposure.Do not look directly at the laser

22、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 evi-dent from visual inspection, nor can t

23、he 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 characteristic

24、s 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 to confirm with therecognized product saf

25、ety 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 the # symbol are critical forsafety. Rep

26、lace 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, noise block-ing capacitors, and noise

27、 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. Whe

28、n 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, etc.).G. Check that replaced wires do no

29、t 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

30、 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)Remove the old connector by cutting the wires

31、 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 connected.Insert the wires fully into th

32、e 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 Secondary ConductorddPrimary Circuit Ter

33、minalsAC 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 returned to their original posi-tions. Aft

34、erwards, 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 terminals and surround-ing metallic parts

35、. (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)and externally exposed accessible parts

36、 (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 cordplug prongs) and exposed accessible par

37、ts. 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 reference only. Be sure to confirm the prec

38、ise 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 Regulator ICs is indi-cated as shown.b. For

39、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. FFC (Flexible Foil Connector) cable sh

40、ould 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 6 seconds). (Fig. S-1-1)(2) Remove the

41、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. S-1-6)(1) Release the flat pack-IC from

42、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)2. The flat pack-IC on the CBA is affixe

43、d 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-ICDesolderingMachineCBAFlat Pack-ICTweezersMasking Tap

44、eFig. 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 pack-IC upward one byone, using a sharp pin

45、 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

46、 and heatup. Then remove (glue will be melted). (Fig. S-1-6)(4)Release the flat pack-IC from the CBA using twee-zers. (Fig. S-1-6)With Iron Wire:(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, y

47、oucan 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 CBA contactpads as shown in Fig. S-1

48、-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 using twee-zers. (Fig. S-1-6)Note:When using

49、a soldering iron, care must be takento ensure that the flat pack-IC is not being held byglue. When the flat pack-IC is removed from theCBA, handle it gently because it may be damagedif force is applied.Flat Pack-ICDesoldering BraidSoldering IronFig. S-1-3Fine TipSoldering IronSharpPinFig. S-1-4To So

50、lid Mounting PointSoldering IronIron WireorHot Air BlowerFig. S-1-5Fine TipSoldering IronCBAFlat Pack-ICTweezersFig. S-1-61-5-32. Installation(1)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.