Yamaha-DVC6280-dvd-sm 维修电路原理图.pdf

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1、DVD-C996/DV-C6280DVD-C996DV-C6280100728SERVICE MANUALDVD PLA YERThis manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, arealready known and

2、 understood by the users, and have therefore not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result inpersonal injury, destruction of expensive components, and failure of the product to perform as specified.For these reasons, we a

3、dvise all YAMAHA product owners that any service required should be performedby an authorized YAMAHA Retailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any individual or firm does not constitute authorization, certifi-cation or recognition of any ap

4、plicable technical capabilities, or establish a principle-agent relationshipof any form.The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering,and service departments of YAMAHA are continually striving to improve YAMAHA products.

5、Modifications are, therefore,inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear toexist, please contact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electric

6、ity your body may haveaccumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to thisbuss).IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power tothe unit.IMPORTANT NOTICEDVD-C996DV-C6280SERVICE MANUALI

7、 CONTENTSTO SERVICE PERSONNEL .1PREVENTION OF ELECTRO STATIC DISCHARGE (ESD) TOELECTRO STATICALLY SENSITIVE (ES) DEVICES.3PRECAUTION, LASER DIODE .4HANDLING PRECAUTIONS FOR TRAVERSE DECK .4FRONT PANELS .5REAR PANELS .67SPECIFICATIONS .7INTERNAL VIEW .8OPTICAL PICKUP SELF-DIAGNOSIS ANDREPLACEMENT PRO

8、CEDURE .9SELF-DIAGNOSIS FUNCTION AND SERVICEMODES .1011SERVICE PRECAUTIONS .11SERVICE TOOLS AND EQUIPMENT .12DISASSEMBLY PROCEDURES .1316ASSEMBLING AND DISASSEMBLING THE OPTICALPICKUP.1722ADJUSTMENT.2326SPECIAL FUNCTIONS FOR MAINTENANCE.2727IC DATA .2932DISPLAY DATA .33ABBREVIATIONS .3435PRINTED CIR

9、CUIT BOARD .3647SCHEMATIC DIAGRAM .4864BLOCK DIAGRAM .6569REMOTE CONTROL TRANSMITTER.70PARTS LIST .7188RadioFans.CN 收音机爱 好者资料库DVD-C996/DV-C6280DVD-C996DV-C6280ITO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked Zand must be replaced with parts

10、having specifications equalto those originally installed.2. Leakage Current Measurement (For 120V Models Only)When service has been completed, it is imperative to verifythat all exposed conductive surfaces are properly insulatedfrom supply circuits.GMeter impedance should be equivalent to 1500 ohm s

11、huntedby 0.15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in bothpolarities.1AC LEAKAGETESTER OREQUIVALENTEQUIPMENTUNDER TESTINSULATINGTABLEWALLOUTLETWARNING: Laser SafetyThis product contains a laser beam component. This component may emit invisible, as wel

12、l as visible radiation,which may cause eye damage. To protect your eyes and skin from laser radiation, the following precautions mustbe used during servicing of the unit.1) When testing and/or repairing any component within the product, keep your eyes and skin more than 30 cm away fromthe laser pick

13、-up unit at all times. Do not stare at the laser beam at any time.2) Do not attempt readjustment, disassembly or repair of the laser pick-up, unless noted elsewhere in this manual.3) CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result inha

14、zardous radiation exposure.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/orplastic (where applicable) components may also contain traces of chemicals found by the California Health andWelfare Agency (and

15、 possibly other entities) to cause cancer and/or birth defects or other reproductive harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FORANY REASON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fu

16、mesor expose eyes to solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your handsbefore handling food.Laser Emitting conditions:1) When the Top Cover is removed, and the POWER SW is turned to the ON position, the laser component wil

17、l emit abeam for several seconds to detect if a disc is present. During this time (5-10 sec.) the laser may radiate through thelens of the laser pick-up unit. Do not attempt any servicing during this period!If no disc is detected, the laser will stop emitting the beam. When a disc is set, you will n

18、ot be exposed to any laseremissions.2) The laser power level can be adjusted with the VR on the pick-up PWB, however, this level has been set by the factoryprior to shipping from the factory. Do not adjust this laser level control unless instruction is provided elsewhere in thismanual. Adjustment of

19、 this control can increase the laser emission level from the device.RadioFans.CN 收音机爱 好者资料库DVD-C996/DV-C6280DVD-C996DV-C62802Laser Diode PropertiesWave length: 665 nmLaser power: CLASS IILaser output: Max. 1.0mW (Continuous)Output value determined by 21 CFR CHAPTER1,SUBCHAPTER JVARO!: AVATTAESSA JA

20、SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NKYMTTMLLELASER-STEILYLLE. L KATSO STEESEEN.VARNING! : OSYNLIG LASERSTRLNING NR DENNA DEL R PPNAD OCH SPRREN R URKOPPLAD.BETRAKTA EJ STRLEN.A, B, G, R modelsOptical pick-upDVD-C996/DV-C6280DVD-C996DV-C62803I PREVENTION OF ELECTRO STATIC DISCHARGE (ESD) TO ELEC

21、TROSTATICALLY SENSITIVE (ES) DEVICESLOCALE MANAGEMENT INFORMATIONLocale Management Information : This DVD player is designed and manufactured to respond to the LocaleManagement Information that is recorded on a DVD disc. If the Locale number described on the DVD disc does notcorrespond to the Locale

22、 number of this DVD player, this DVD player cannot play this disc.This product incorporates copyrightprotection technology that isprotected by method claims ofcertain U.S. patents and otherintellectual property rights ownedby Macrovision Corporation andother rights owners. Use of thiscopyright prote

23、ction technologymust be authorized by MacrovisionCorporation, and is intended forhome and other limited viewing usesonly unless otherwise authorizedby Macrovision Corporation.Reverse engineering or disassemblyis prohibited.qwrwttrwyetSome semiconductor (solid state) devices can be damaged easily by

24、static electricity. Such components commonly are called ElectrostaticallySensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip”components. The following techniques should be used to help reduce the incidence of compon

25、ent damage caused by electro static discharge(ESD).1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touchinga known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which

26、 should be removed forpotential shock reasons prior to applying power to the unit under test.2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to preventelectrostatic charge buildup or exposure of the assembly.3. Use

27、only a grounded-tip soldering iron to solder or unsolder ES devices.4. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can generateelectrical charge sufficient to damage ES devices.5. Do not use freon-propelled chemicals. The

28、se can generate electrical charges sufficient to damage ES devices.6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ESdevices are packaged with leads electrically shorted together by conductive foam, aluminum

29、 foil or comparable conductive material).7. Immediately before removing the protective material from the leads of a replacement ES divice, touch the protective material to the chassis orcircuit assembly into which the device will be installed.CAUTION: Be sure no power is applied to the chassis or ci

30、rcuit, and observe all other safety precautions.8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together ofyour clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficien

31、t to damage an ES device).There are special components used in this equipment which are important for safety.These parts are marked Z by in the schematic diagrams, exploded views and replacement parts list. It isessential that these critical parts should be replaced with manufacturers specified part

32、s to prevent shock, fire, orother hazards. Do not modify the original design without permission of manufacturer.IMPORTANT SAFETY NOTICEDVD-C996/DV-C6280DVD-C996DV-C62804I PRECAUTION, LASER DIODEI HANDLING PRECAUTIONS FOR TRAVERSE DECKCAUTION:This unit utilizes a class II laser. Visible laser radiati

33、on is emitted from the optical pickup lens when theunit is turned on:1.Do not look directly into the pickup lens.2.Do not use optical instruments to look at the pickup lens.3.Do not adjust the preset variable resistor on the optical pickup.4.Do not disassemble the optical pickup unit.5.If the optica

34、l pickup is replaced, use the manufactures specified replacement pickup only.6.Use of control or adjustment or performance of procedures other than those specified herein may result in hazardousradiation exposure.The laser diode in the optical pickup may break down due topotential difference caused

35、by static electricity of clothes orhuman body.So be careful of electrostatic breakdown during repair of theoptical pickup.Handling of optical pickup1.Do not subject the optical pickup to static electricityas it is extremely sensitive to electrical shock.2.To prevent the breakdown of the laser diode,

36、an antistatic shorting bridge is soldered into theflexible board (FPC Board).When removing or connecting the shorting bridge,finish the job in as short times as possible.3.Be careful not to apply excessive stress to theflexible board (FPC Board).4.Do not turn the variable resistor (Laser power adjus

37、tment).It has already been adjusted.Grounding for electrostatic breakdown prevention1.Human body grounding.Use the antistatic wrist strap to discharge the staticelectricity from your body.2.Work table grounding.Put a conductive material (sheet) or steel sheet on the areawhere the optical pickup is p

38、laced and ground the sheet.Caution:The static electricity of your clothes will not be groundedthrough the wrist strap. So take care not to let your clothestouch the optical pickup.1MSolder(Magnified view)Use a clip or other itemto ground the unit.Flexible CablePickup unitConductive material(sheet) o

39、r steel sheetAnti-static wrist stripDVD-C996/DV-C6280DVD-C996DV-C6280I FRONT PANELSM DVD-C996M DV-C62805DVD-C996/DV-C6280DVD-C996DV-C6280I REAR PANELSM DVD-C996 U, C modelsM DV-C6280 U modelM DVD-C996 R model240V120V110V220VM DVD-C996 A model6DVD-C996/DV-C6280DVD-C996DV-C6280U . USA modelC .Canadian

40、 modelA . Australian modelB . British modelG . European modelR . General modelManufactured under license from Dolby Laboratories Licens-ing Corporation. Dolby and the double-D symbol V aretrademarks of Dolby Laboratories Licensing Corporation.I SPECIFICATIONS7I AUDIO SECTIONFrequency ResponseDVD (48

41、kHz Sampling)2 Hz to 22 kHzDVD (96kHz Sampling)2 Hz to 44 kHzCD, Video CD2 Hz to 20 kHzHarmonic Distortion+Noise (1kHz)0.002%S/N Ratio115 dB (Weighted)Dynamic RangeDVD (48kHz, 24 bit)103 dBCD, Video CD99 dBOutput Voltage (1 kHz, 0 dB)2.0 VI VIDEO SECTIONVIDEO output1 Vp-p (75 ohms)S VIDEO outputY ou

42、tput1 Vp-p (75 ohms)C outputU, C, R models0.286 Vp-p (75 ohms)A, B, G models0.3 Vp-p (75 ohms)COMPONENT VIDEO output (U, C, R, A only)Y output1 Vp-p (75 ohms)Pb output0.7 Vp-p (75 ohms)Pr output0.7 Vp-p (75 ohms)I GENERALPower RequirementsU, C models120V, 60HzA model240V, 50HzB, G models230V, 50HzR

43、model110/120/220/240V, 50/60HzPower Consumption18WDimensions (W x H x D)435 x 116 x 404 mm(17-1/8” x 4-9/16” x 15-7/8”)Weight6.1 kg (13 lbs 7 oz)FinishDVD-C996 (U, C, A, B, G)Black colorDVD-C996 (U, C, R, A)Gold colorDV-C6280 (U)Black colorAccessoriesAudio/video connection cordRemote control transmi

44、tterBattery: x2 (Size “AA”, R06)* Specifications subject to change without notice.M DVD-C996 B, G modelsDVD-C996/DV-C6280DVD-C996DV-C62808I INTERNAL VIEWerwtyq435 (17-1/8)16(5/8)100(3-15/16)116(4-9/16)3(1/8)6(1/4)395 (15-9/16)404 (15-7/8)G DIMENSIONUnit : mm (inch)q MAIN (3) P.C.B.w CM-220 UNITe CLA

45、MPER ASSYr DVD MODULE P.C.B.t TRAY ASSYy MAIN (1) P.C.B.DVD-C996/DV-C6280DVD-C996DV-C62809I OPTICAL PICKUP SELF-DIAGNOSIS AND REPLACEMENT PROCEDUREThe optical pickup self-diagnosis function and tilt adjustment check function have been newly added to this player. When repair-ing, use the following pr

46、ocedure for effective Self-diagnosis and tilt adjustment.Be sure to use the self-diagnosis function before replacing the optical pickup when “NO DISC” is displayed. As a guideline, youshould replace the optical pickup when the value of the laser drive current is more than 55.NotePress the power butt

47、on to turn on the power, and check the value before the unit warms up (within three minutes).NO DISC is displayed,unit does not play smoothly, etc.Replace the optical pickup(Refer to Assembling andDisassembling the OpticalPickup, page 17.)Do the optical pickuptilt adjustment.(Refer to Optical Pickup

48、Tilt Adjustment, page 23.)Check the laser drivecurrent after replacement. Write the present value intothe unit if it is 45 or less.Check the laser drive current.Value is more than 55Value is55 or lessInitialize the player.End(Refer to Handling AfterCompleting Repairs, page 11.)Use the tilt adjustmen

49、tcheck function.Replace with a new optical pickup if the presentvalue is more than 45.Cause:Damage due to static electricity during replacement. Use the self diagnosis function belowwhen NO DISC is displayed or unit doesnt read a disc, before replacingthe OPU. Use the optical pickup self-diagnosis f

50、unction.Method: With no disc in the player. Press the ON SCREEN button on theremote control unit while pressing thePAUSE and PLAYXCHANGEbutton on the player.Method: With no disc in the player. Press the ON SCREEN button on theremote control unit while pressing thebutton on the player.Writing method: