Hitachi-DVRV8500E-cd-sm 维修电路原理图.pdf

SERVICE MANUALSPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENTDigital Media Division,YokohamaDVD VIDEO RECORDER with VIDEO CASSETTE RECORDER2005JulySM0512DV-RV8500EPAL PAL SECAM DO NOT RESELL OR DIVERT IMPROPERLY.DV-RV8500E(UK)RadioFans.CN 收音机爱 好者资料库Contents - 1Table of Contents1 Safety Precaution for Repair . 1-11-1 Cautions . 1-11-2 Electrostatic Protection Measures . 1-21-3 Cautions When Handling DVD Drive. 1-21-4 Lead-Free Solder. 1-31-5 Notes When Using Service Manual . 1-42 General Description . 2-12-1 Overview . 2-12-1-1 Service method . 2-12-1-2 Disc information. 2-22-2 Features . 2-42-3 Specifications . 2-52-4 Major Differences from Previous Model . 2-62-5 Function Differences fromPrevious Model. 2-72-6 Names of Parts. 2-82-7 List of Abbreviations and Terms for DVDRecorder . 2-123 Details of Servicing andTroubleshooting . 3-13-1 Details of Servicing. 3-13-1-1 Removing Disc from Faulty Recorder . 3-13-1-2 Removing Video Cassette from Faulty Recorder. 3-13-1-3 Firmware . 3-23-1-4 Setting to defaults at the factory . 3-33-2 Troubleshooting . 3-43-2-1 Troubleshooting electronic system. 3-43-2-2 Troubleshooting mechanical block . 3-144 Disassembly and Reassembly . 4-14-1 Order of Disassembly . 4-14-2 Cabinet Disassembly. 4-1(1) Top Cover . 4-1(2) Front Panel. 4-2(3) FAN Motor . 4-2(4) SMPS P.C.B . 4-3(5) Deck mechanism. 4-4(6) TIMER P.C.B . 4-5(7) VCR P.C.B . 4-5(8) DVD multi-drive . 4-6(9) VDR, JACK and KEY P.C.Bs . 4-64-3 Deck Mechanism Parts Locations . 4-74-4 Deck Mechanism Disassembly. 4-8(1) Drum assembly . 4-8(2) Top plate. 4-9(3) CST holder assembly . 4-9(4) F/L rack gear assembly . 4-9(5) Door opener . 4-9(6) F/L arm assembly. 4-9(7) S/W lever assembly. 4-9(8) L/D motor assembly . 4-11(9) Wheel gear . 4-11(10) F/E head . 4-11(11) A/C head assembly . 4-11(12) T brake assembly . 4-12(13) Tension arm assembly. 4-12(14) S reel and T reel . 4-12(15) P4 base assembly . 4-13(16) Lid opener . 4-13(17) Pressure arm assembly . 4-13(18) Take-up arm . 4-13(19) Capstan supporter . 4-14(20) Capstan belt and capstan motor. 4-14(21) F/R lever. 4-14(22) D37 clutch assembly . 4-14(23) Driver gear and cam gear. 4-15(24) Sector gear . 4-15(25) Capstan brake assembly . 4-15(26) Slider plate . 4-15(27) Tension lever . 4-15(28) Spring lever . 4-15(29) Brake lever . 4-15(30) P2 gear assembly andP3 gear assembly. 4-16(31) P2 base assembly andP3 base assembly . 4-16(32) Loading base. 4-16(33) Tension base . 4-17(34) Jog idler arm assembly . 4-174-5 Checking Mode after Reassembling DeckMechanism . 4-18RadioFans.CN 收音机爱 好者资料库Contents - 25 Adjustment / Maintenance . 5-15-1 Set-up for Adjustment . 5-15-2 VCR Electrical Adjustment . 5-25-2-1 Head switching adjustment. 5-25-3 Deck Mechanism Tape Transport SystemAdjustment . 5-35-3-1 Guide roller height adjustment .5-35-3-2 A/C head adjustment . 5-45-3-3 X-value adjustment. 5-55-3-4 Adjustments after replacing drum assembly . 5-55-3-5 Check after adjustment . 5-65-3-6 Method of setting the mechanism to loading status without inserting tape. 5-65-3-7 Reel torques. 5-75-4 Maintenance. 5-85-4-1 Maintenance and inspection. 5-85-4-2 Lubricating oil and greasing. 5-106 Exploded View and Parts List. 6-16-1 Exploded Views . 6-16-1-1 Cabinet Section . 6-16-1-2 F / L Mechanism. 6-26-1-3 Deck Mechanism Section - Top view . 6-36-1-4 Deck Mechanism Section - Bottom view6-46-2 Parts List . 6-56-2-1 Mechanical Parts List . 6-56-2-2 Electrical Parts List. 6-6S Schematic, Wiring Diagrams . S-1S-1 Wiring Diagram.S-1S-2 S.M.P.S Schematic Diagram .S-2S-3SYSTEM Schematic Diagram(VCR P.C.B)S-3S-4TUNER Schematic Diagram(VCR P.C.B) .S-4S-5 A/V Schematic Diagram(VCR P.C.B) .S-5S-6 Hi-Fi Schematic Diagram(VCR P.C.B) .S-6S-7 REAR JACK Schematic Diagram(VCR P.C.B).S-7S-8 TIMER,KEY Schematic Diagrams .S-8S-9 JACK Schematic Diagram .S-9S-10 A/V,SYSTEM Circuit Waveforms .S-10S-11 CIRCUIT VOLTAGE CHART.S-11C Circuit Board Diagrams . C-1C-1 VCR Circuit Board Diagram. C-1C-2 S.M.P.S Circuit Board Diagram . C-3C-3 JACK Circuit Board Diagram . C-4C-4 TIMER Circuit Board Diagram . C-4C-5 KEY Circuit Board Diagram . C-4B Block Diagrams . B-1B-1 S.M.P.S Circuit Block Diagram.B-1B-2 VIDEO Circuit Block Diagram .B-2B-3 AUDIO Circuit Block Diagram .B-3B-4 SYSTEM Circuit Block Diagram.B-4B-5 VIDEO I/O Circuit Block Diagram .B-51 - 1Safety Precaution for Repair11-1 CautionsCAUTIONThere is a high-voltage section inside the DVD videorecorder. When repairing or inspecting it, take great careto prevent electric shock: Use an isolating transformer,wear gloves, etc. Many electrical and mechanical parts have special safety-related characteristics. These are often notevident from visual inspection nor can the protection afforded by them necessarily be obtained by usingreplacement components rated for a higher voltage, wattage, etc. Replacement parts which have thesespecial safety characteristics are identified in this Service Manual. Electrical components having suchfeatures are identified by marking with a on the schematics and the parts list in this Service Manual.The use of a substitute replacement component which does not have the same safety characteristics asthe HITACHI recommended replacement one, shown in the parts list in this Service Manual, may createshock, fire, or other hazards. Product safety is continuously under review and new instructions areissued from time to time. For the latest information, always consult the current HITACHI Service Manual.A subscription to, or additional copies for, HITACHI Service Manual may be obtained at a nominalcharge from HITACHI SALES CORPORATION.PRODUCT SAFETY NOTICECAUTIONThis product contains a laser diode of higher class than 1. To ensure contin- ued safety, do not remove any covers or attempt to gain access to the in- side of the product. Refer all servicing to qualified personnel.1 - 2Safety Precaution for Repair Electrostatic Protection Measures / Cautions When Handling DVD Drive1-2 Electrostatic Protection MeasuresSemiconductor components can be damaged by static electricity charged on clothes, human body,etc. Take great care when handling components to avoid electrostatic damage, and performservicing in an environment where grounding is complete.(1) Grounding work benchLay out an antistatic mat on work bench, and then use the ground plate to ground the work bench.Antistatic matGround1M ohm1M ohmAntistatic wrist strap 1-3 Cautions When Handling DVD DriveThe optical pickup in DVD drive has a high precision structure: Be sure to observe the followingcautions.1) Do not subject optical pickups to any severe vibrations orimpact during movement, installation or disassembly.2) When performing repair work, do not perform disassemblyany further than that described in this manual.3) Never turn the semi-variable resistors for adjustment inoptical pickup or DVD drive.4) NEVER look into the objective lens in optical pickup ordirectly view the laser light: You could lose your eyesight.Do not directly look at laser light from pickup.(2) Grounding human bodyUse an antistatic wrist strap to discharge any static electricity charged on the body. Also, use atester for wrist strap to make sure that the wrist strap is working normally. Note, however, thatstatic electricity charged on clothes will not be discharged by wrist strap: Therefore do not allowyour clothes to touch the semiconductor components.1 - 31-4 Lead-Free SolderThe printed circuit board that uses lead-free solder is adopted. To protect the global environment,use the recommended lead-free solder also during servicing.Read and observe the following before soldering:CautionALWAYS wear protective goggles during soldering so that no solder smoke or scattered solderenters the eye. Lead-free solder may scatter at high temperatures of 600C.(1) Characteristics of lead-free solderThe melting point of lead-free solder is 30-40C higher than that of lead based solder.Point to be solderedSurface-mounted (chip) parts other thanthose shown belowSurface-mounted (chip) parts for DVDcameras, cellular phones onlyDiscrete partsChassis, metal shield, etc.Tip temperature320 30Cheating time: less than 5 seconds350 10Cheating time: less than 3 seconds380 30C420 30C(2) Lead-free solder for servicingUse the following lead-free solder for servicing:Recommended lead-free solder and composition of alloy (wt%): Sn-3.0Ag-0.5Cu or equivalentInformation:For composition of alloy, Sn is tin; Ag is silver; Cu is copper; Bi is bismuth; Pb is lead.(3) Soldering iron for servicingThe temperature of soldering iron tip must be adjusted according to the points to be soldered: Usean antistatic soldering iron with thermal control function.When removing components, take care not to damage any surrounding component or pattern. Whenattaching components, observe the heating time in the following table so that the components arenot destroyed by heat.Tip temperatures for different soldering points:Safety Precaution for Repair Lead-Free Solder(4) Cautions when using lead based solderIt is recommended that you use lead-free solder when servicing, but it is also possible to serviceusing lead based solder. However, if lead based solder is used for servicing, take care with thefollowing:1) Before using lead based solder, remove the lead-free solder completely from the point to besoldered.2) For additional soldering for repair, set the soldering iron tip temperature for lead-free solder, mixlead based solder and lead-free solder sufficiently. Do not perform any repair using the baresoldering iron tip without adding solder, since it will cause secondary failure due to lack ofstrength.1 - 41-5 Notes When Using Service Manual(1) Value units used in parts listCertain symbols are indicated as shown below for value units of resistors, capacitors and coils inparts list. When you read them, note the following regular indications:(2) Values in schematic diagramsThe values, dielectric strength (power capacitance) and tolerances of the resistors (excludingvariable resistors) and capacitors are indicated in the schematic diagrams using abbreviations.Certain symbols are indicated for value units: When you read them note the regular indications intables below:ResistorsCapacitorsCoilsIndication in list Regular indicationKOHM.kUF.FPF.pFUH.HMH.mHPartsResistorCapacitorCoilItemValueTolerancePowercapacitanceIndicationNo indication.K.kM.MNo indication. 5%(All tolerances other than 5% areindicated in schematic diagrams)No indication. 1/8W(1/16 W for leadless resistors with noindication)All capacitances other than the aboveare indicated in schematic diagrams.ItemValueDielectricstrengthIndicationNo indication.FP.pFNo indication. 50V(All dielectric strengths other than50 V are indicated in schematicdiagrams)ItemValueIndication.Hm.mHSafety Precaution for Repair Notes When Using Service Manual2 - 1General Description2-1 OverviewThe DV-RV8500E is a DVD recorder with VHS VCR that incorporates a DVD super multi-drive:It allows user to record and play back on +RW and +R, as well as on DVD-RAM, DVD-RW, DVD-Rand VHS videotape.It can be used without any concern about the type of media.2-1-1 Service methodBasically, components are replaced when servicing the DV-RV8500E. However, the service methodis different for high-density packaging PCBs and precision components.Refer to the following table and perform the designated, appropriate servicing. Any changes thatoccur in the service method will be published using service bulletin, etc.Do not perform any servicing other than that described in this manual.2Fig. 2-1-1 Component LocationComponentExterior componentDVD Multi DriveVDR P.C.BVCR P.C.BTIMER P.C.BJACK P.C.BKEY P.C.BSMPS P.C.BDeck mechanismService methodComponent replacementUnit replacementCircuit board assemblyreplacementComponent replacementComponent replacementComponent replacementComponent replacementComponent replacementComponent replacementVDR P.C.BVCR P.C.BDVD Multi DriveSMPS P.C.BTIMER P.C.BDeck MechanismKEY P.C.BJACK P.C.B2 - 2General Description Overview2-1-2 Disc informationRecordable DiscsDVD-RW (Digital Video Disc - ReWritable):These Discs can be recorded on repeatedly.Recordings can be erased, then you canrecord again on the same Disc.When a brand-new DVD-RW disc is inserted,the screen for formatting the disc will appear:Choose the VR mode or Video mode, andthen format the disc before use.DVD-R (Digital Video Disc - Recordable):These Discs can be recorded only once. Afteryou finalize a DVD-R, you cannot record on itor edit it any more.DVD+RW (Digital Video Disc + ReWritable):These Discs can be recorded on repeatedly.Recordings can be erased, then you canrecord again on the same Disc.When a brand-new DVD+RW disc is inserted,the screen for formatting the disc will appear:Format the disc before use.When a DVD+RW disc recorded on thisrecorder is removed, it will automatically befinalized, but if you enter a title after finalization,you will need to manually finalize it.DVD+R (Digital Video Disc + Recordable):These Discs can be recorded only once. Afteryou finalize a DVD+R, you cannot record onit or edit it any more.DVD-RAM (DVD - Random AccessMemory) DVD-RAM discs can be formatted for VRmode recording.These Discs can be recorded on repeatedly.Recordings can be erased, then you canrecord again on the same Disc.Playable on DVD-RAM compatible players.Recordings can be extensively edited.Only DVD-RAM standard Version 2.0, 2.1and 2.2 discs can be used in this unit.You cannot use the cartridge-type DVD-RAMdisc in this unit.When a brand-new DVD-RAM disc isinserted, the screen for formatting the discwill appear: Format the disc before use.In the case of an 8-cm DVD-RAM on whichphotos were recorded on a Hitachi DVDvideo camera/recorder, no editing of DiscNavigation or play list can be performed onthis recorder (recording on it and creating aplay list are possible).otes This recorder cannot record CD-R or CD-RW discs. DVD-R/RW, DVD+R/RW and CD-R/RW discsrecorded using a personal computer or a DVD or CDrecorder may not play if the disc is damaged or dirty,or if there is dirt or condensation on the recorderslens. If you record a disc using a personal computer, even ifit is recorded in a compatible format, there are casesin which it may not play because of the settings of theapplication software used to create the disc. (Checkwith the software publisher for more detailedinformation.) The company does not hold any responsibility tocompensate the contents which should have beenrecorded, and any losses or damages (e.g. losses ofbusiness profit, or business intermission) that mayarise from malfunction of this recorder (notrecording/editing as intended).Problems arising in the following situations are included. When a DVD disc recorded on this recorder is usedin a DVD recorder of another manufacturer, or used(insertion, playback, recording or editing) in apersonal computer DVD drive. When a DVD that has been used as above is usedagain in this recorder. When a DVD disc recorded in a DVD recorder ofanother manufacturer,