Hitachi-DVRF7U-cd-sm 维修电路原理图.pdf

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1、SERVICE MANUALSPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENTDigital Media Division,TokaiDVD VIDEO RECORDER with VIDEO CASSETTE RECORDER2004JulyTK No. 0417EDV-RF7UDO NOT RESELL OR DIVERT IMPROPERLY.RadioFans.CN 收音机爱 好者资料库Contents - 1Table of contents1 Safety Precaution for Repair . 1-

2、11-1 Cautions . 1-11-2 Use of Solder for Repairs . 1-11-3 Use of Solder for Repairs . 1-11-4 Electrostatic Protection Measures . 1-21-5 Notes When Using Service Manual . 1-32 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 Specifi

3、cations . 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 . 2-113 Details of Servicing andTroubleshooting . 3-13-1 Details of Servicing. 3-13-1-1 Removing Disc from Faulty Rec

4、order . 3-13-1-2 Removing Video Cassette from FaultyRecorder . 3-13-1-3 Firmware . 3-23-2 Troubleshooting . 3-34 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) Rear Panel and FAN Motor. 4-2(4) DVD Multi Drive . 4-3

5、(5) DVD Main P.C.B and Jack P.C.B . 4-3(6) Front P.C.B . 4-4(7) Deck Mechanism. 4-4(8) Key P.C.B and VCR Main P.C.B . 4-54-3 VCR Deck Parts Locations . 4-64-3-1 Top View . 4-64-3-2 Bottom View . 4-74-4 VCR Deck Mechanism Disassembly . 4-8(1) Holder FL Cassette Assy Removal . 4-8(2) Lever FL Arm Assy

6、 Removal . 4-8(3) Lever FL Door Removal . 4-9(4) Slider FL Drive, Gear FL Cam Removal . 4-9(5) Gear Worm Wheel Removal . 4-10(6) Cable Flat Removal . 4-10(7) Motor Loading Assy Removal . 4-11(8) Bracket Gear, Gear Joint 2, 1 Removal . 4-11(9) Gear Loading Drive, Slider Cam, Lever LoadS, T Assy Remov

7、al. 4-12(10) Lever Pinch Drive, Lever Tension DriveRemoval . 4-13(11) Lever Tension Assy, Band Brake AssyRemoval . 4-13(12) Lever Brake S, T Assy Removal . 4-14(13) Gear Idle Assy Removal . 4-14(14) Disk S, T Reel Removal. 4-15(15) Holder Clutch Assy Removal . 4-15(16) Lever Up Down Assy, Gear Cente

8、r AssyRemoval . 4-16(17) Guide Cassette Door Removal . 4-17(18) Lever Unit Pinch Assy, Plate Joint, SpringPinch Drive Removal . 4-17(19) Lever #9 Guide Assy Removal. 4-18(20) FE Head Removal . 4-18(21) ACE Head Removal . 4-19(22) Slider S, T Assy Removal . 4-19(23) Plate Ground Deck, Cylinder AssyRe

9、moval . 4-20(24) Hook Capstan, Belt Pulley Removal . 4-20(25) Motor Capstan Assy Removal . 4-21(26) Post #8 Guide Assy Removal . 4-214-5 The table of cleaning, Lubrication andreplacement time about principal parts. 4-225 Adjustment. 5-15-1 Set-up for Adjustment . 5-15-2 VCR Electrical Adjustment . 5

10、-25-2-1 Reference. 5-25-2-2 Head Switching Adjustment. 5-35-2-3 NVRAM Option Setting. 5-35-3 VCR Mechanism Adjustment. 5-45-3-1 Tape Transport System and AdjustmentLocations. 5-4RadioFans.CN 收音机爱 好者资料库Contents - 25-3-2 Tape Transport System Adjustment . 5-55-3-3 Reel Torque . 5-106 Exploded View and

11、 Parts List. 6-16-1 Exploded Views . 6-16-1-1 Cabinet Section . 6-16-1-2 Deck Mechanism Section-Top view . 6-26-1-3 Deck Mechanism Section-Bottom view 6-36-2 Parts List . 6-46-2-1 Mechanical Parts List . 6-46-2-2 Electrical Parts List. 6-5S Schematic, Wiring Diagrams . S-1S-1 Wiring Diagram.S-1S-2 S

12、.M.P.S Schematic Diagram .S-2S-3 Power Schematic Diagram .S-3S-4 Logic Schematic Diagram.S-4S-5 A/V Schematic Diagram .S-5S-6 Hi/Fi/MTS Schematic Diagram .S-6S-7 MUX & TM & A/V InputSchematic Diagram .S-7S-8 MUX Connector Schematic Diagram .S-8S-9 Audio Out Schematic Diagram.S-9S-10 Video Out Schema

13、tic Diagram .S-10S-11 Front/Key Schematic Diagram.S-11C Circuit Board Diagrams . C-1C-1 VCR Main P.C.B . C-1C-2 Jack P.C.B . C-3C-3 Front P.C.B . C-5C-4 Key P.C.B. C-5B Block Diagram . B-11 - 1Safety Precaution for Repair11-1 Cautions Many electrical and mechanical parts have special safety-related

14、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

15、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 characteristicsas the HITACHI recommended replacement one, shown in the par

16、ts list in this Service Manual, maycreate shock, fire, or other hazards. Product safety is continuously under review and new instructionsare issued from time to time. For the latest information, always consult the current HITACHI ServiceManual. A subscription to, or additional copies for, HITACHI Se

17、rvice Manual may be obtained at anominal charge from HITACHI SALES CORPORATION.PRODUCT SAFETY NOTICECAUTIONThere is a high-voltage section inside the DVD recorder.When repairing or inspecting it, take great care toprevent electric shock: Use an isolating transformer,wear gloves, etc.CLASS 1LASER PRO

18、DUCTCAUTIONThis 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.CAUTIONCLASS 2M LASER RADIATION WHEN OPEN. DO NOT STARE INTO THE BEAM OR

19、VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.1-2 Use of Solder for RepairsLead-based solder is used for the printed circuit boards in this recorder.Therefore, when servicing, use lead-based solder and set the temperature at the tip of soldering iron30 - 40 C lower than when using lead-free solder.1 - 2Saf

20、ety Precaution for Repair Electrostatic Protection Measures / Cautions When Handling DVD Drive1-3 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,

21、 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 1-4 Cautions When Handling DVD DriveThe optical pickup in

22、 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 manua

23、l.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 wri

24、st 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 s

25、emiconductor components.1 - 31-5 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 diagramsT

26、he 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:Re

27、sistorsCapacitorsCoilsIndication 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 resis

28、tors 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

29、Notes When Using Service Manual2 - 1General Description2-1 OverviewModel DV-RF7U is a multi-drive DVD recorder with VCR: It can record on DVD-RAM, DVD-RWand DVD-R discs and play them back.The DV-RF7U can handle DVD-RW discs for recording and playback in Video format and VR (VideoRecording) format, a

30、nd DVD-RAM discs of both cartridge type (12 cm) and non-cartridge type.The DV-RF7U can play back 8 cm DVD-R discs recorded on Hitachi DVD video camera/recorderseven when they are not yet finalized: It also has a DV input jack with which digital dubbing ispossible from digital video cameras.The DV-RF

31、7U also allows one-button dubbing from VHS videotape to DVD, and vice versa.2-1-1 Service methodBasically, components are replaced when servicing the DV-RF7U. However, the service method isdifferent for high-density packaging PCBs and precision components.Refer to the following table and perform the

32、 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 DriveDVD Main P.C.BVCR Main P.C.BFron

33、t P.C.BKey P.C.BJack P.C.BDeck mechanismService methodComponent replacementUnit replacementCircuit board assemblyreplacementComponent replacementComponent replacementComponent replacementComponent replacementComponent replacementDVD MultidriveDVD Main P.C.BJack P.C.BDeck mechanismVCR Main P.C.BKey P

34、.C.BFront P.C.B2 - 2General Description Overview2-1-2 Disc informationAudio CD An audio disc on which 44.1kHz PCM Audio isrecorded. Plays CD-DA format audio CD-R and CD-RW discs.This unit may not be able to play some CD-R or CD-RWdiscs due to the condition of the recording.CD-R/RWMP3 CD-R/RW Only CD

35、-R discs with MP3 files recorded with ISO9660or JOLIET format can be played back. Only MP3 files with the mp3, and MP3 extensioncan be used. For MP3 files recorded with a VBR (Variable Bit Rates),from 32 Kbps to 320 Kbps, the sound may cut in out. Playable bit rate range is from 56Kbps to 320Kbps. T

36、he unit can handle a maximum of 1000 files andfolders.JPEG CD-R/RW Only JPEG files with the .jpg, .JPG extension can beused. The unit can handle a maximum of 1000 files andfolders. Maximum size of progressive JPEG is 3M pixels. MOTION JPEG is not supported.Using CD-R/RW If the CD-R/RW disc was not r

37、ecorded as a closed ses-sion, you may experience a delay in the early play backtime, and all recorded files may not play. Some CD-R/RW discs may not be playable with this unit,depending on the device which was used to burn them.For contents recorded on CD-R/RW media from CDs foryour personal use, pl

38、ayability may vary depending oncontents and discs.DVD-R Disc Playback and Recording Once a DVD-R/RW recorded in Video Mode is finalized,it becomes DVD-Video. You can record onto the available space on the disc andperform editing functions such as giving titles to discsand programs and erasing progra

39、ms before finalizing. When programming is erased from a DVD-R, that spacedoes not become available. Once an area on a DVD-R isrecorded on, that area is no longer available forrecording, whether the recording is erased or not. It takes about 30 seconds for the unit to completerecording management inf

40、ormation after recordingfinishes. This product optimizes the DVD-R for each recording.Optimizing is carried out when you start recording afterinserting the disc or turn on the unit. Recording onto thedisc may become impossible if optimizing is carried outtoo many times. Playback may be impossible in

41、 some cases due to therecording condition. This unit can play back DVD-R discs recorded andfinalized with a DVD video recorder. It may not be ableto play some DVD-R discs depending on the disc and therecording condition.DVD-RW Disc Playback and Recording Recording and playback can be performed on DV

42、D-RWdiscs in both Video and VR Modes. Once a DVD-RW recorded in VR Mode is finalized, youcannot perform additional recording. Once a DVD-RW recorded in Video Mode is finalized, itbecomes DVD-Video. In both modes, playback can be performed before andafter finalization, but additional recording, delet

43、ing andediting cannot be performed after finalization. If you want to record the disc in VR Mode and thenrecord in V Mode, be sure to execute Format. Be carefulwhen executing Format because all the recorded datamay be lost. A DVD-RW blank disc is initialized to Video Mode whenfirst initialized.DVD-R

44、W (VR mode)- This is a format that is used for recording data on aDVD-RAM or DVD-RW disc. You can repeat recording,editing, deleting, partial deletion, creation of playlist, etc.- A disc that is recorded in this mode may not be playedby existing DVD players.DVD-RW (Video mode)- This is a format that

45、 is used for recording data on aDVD-RW or DVD-R disc. The disc can be played by anexisting DVD player once it has been finalized.- If a disc that has been recorded in Video mode by adifferent manufacturers recorder, but has not beenfinalized, it cannot be played or additionally be recordedby this re

46、corder.DVD-Video A digital versatile disc (DVD) can contain up to 135minutes of images, 8-language audio and 32 subtitlelanguages. It is equipped with MPEG-2 picturecompression and Dolby 3D surround, allowing you toenjoy vivid and clear theater quality images in thecomfort of your own home. When swi

47、tching from the first layer to the second layerof a double-layered DVD Video disc, there may bemomentary distortion in the image and sound.This is not a malfunction of the unit. Once a DVD-R/RW recorded in Video Mode is finalized,it becomes DVD-Video.2 - 3ProtectionThis DVD Recorder-VCR canallow you

48、 to protect thecontents of your discs, asdescribed below. Cartridge-protected:With the write-protect tabset in the protect position,the contents of the disc cannot be recorded, edited, orerased. Program-protected: Locking a Title List Entry Disc-protected: Disc Protection*DVD-RAM/DVD-RW/DVD discs th

49、at areincompatible with the DVD-VIDEO format cannot beplayed with this product.*For more information on recording a DVD, consultyour DVD-RAM/DVD-RW/DVD-R manufacturer.*If poor quality DVD-RAM/DVD-RW/DVD-R discs areused, your recordings may fail.Do not use the following discs! LD, CD-G, CD-I, CD-ROM,

50、 DVD-ROM, VCD, DVD+Rand DVD+RW discs should not be used in this product.NoteDisc types that can be played : CD/CD-R/CD-RW/MP3/JPEG/DVD-Video/DVD-RAM/ DVD-RW/DVD-R.However, if your DVD-RW disc was recorded with anotherdevice, it can be played only if it was recorded andfinalized in Video Mode. Some c