Yamaha-DVDC740-dvd-sm 维修电路原理图.pdf

100827SERVICE MANUALDVD PLAYERThis 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 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 advise 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 applicable 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. 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 electricity 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-C740/DV-C6660SERVICE MANUALI CONTENTSTO SERVICE PERSONNEL .23PREVENTION OF ELECTROSTATIC DISCHARGE .4LOCALE MANAGEMENT INFORMATION .4FRONT PANELS .5REAR PANELS .6SPECIFICATIONS .7DIMENSIONS .8INTERNAL VIEW .8DISASSEMBLY PROCEDURES .910DIAGNOSTIC SOFTWARE.1119IC DATA .2025BLOCK DIAGRAM .27PRINTED CIRCUIT BOARD .2836SCHEMATIC DIAGRAM .3754PARTS LIST .5462DVD-C740/DV-C6660RadioFans.CN 收音机爱 好者资料库DVD-C740/DV-C6660DVD-C740/DV-C66602ITO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked Zand must be replaced with parts 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 shuntedby 0.15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in bothpolarities.AC LEAKAGETESTER OREQUIVALENTEQUIPMENTUNDER TESTINSULATINGTABLEWALLOUTLETWARNING: Laser SafetyThis product contains a laser beam component. This component may emit invisible, as well 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-up unit at all times. Do not stare at the laser beam at any time.2) Do not attempt to readjust, disassemble or repair 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 inhazardous 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 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 fumesor 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 STANDBY/ON SW is turned to the ON position, the laser component willemit a beam for several seconds to detect if a disc is present. During this time (5-10 sec.) the laser may radiate throughthe lens 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 loaded, you will not 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 this control can increase the laser emission level from the device.THE DVD AUDIO/VIDEO PLAYER SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT PROPERLY QUALIFIEDSERVICE PERSONNEL.RadioFans.CN 收音机爱 好者资料库DVD-C740/DV-C6660DVD-C740/DV-C66603Laser Diode PropertiesType:Semiconductor laser GaAlAsWave length:650 nm (DVD)780 nm (VCD/CD)Output Power:0.8 mW (DVD)0.3 mW (VCD/CD)Beam divergence:60 degreeVARO!: AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NKYMTTMLLELASER-STEILYLLE. L KATSO STEESEEN.VARNING! : OSYNLIG LASERSTRLNING NR DENNA DEL R PPNAD OCH SPRREN R URKOPPLAD.BETRAKTA EJ STRLEN.Optical pick-upCLASS 1 LASER PRODUCTLASER KLASSE 1 PRODUKTLUOKAN 1 LASERLAITEKLASS 1 LASER APPARATPRODUIT LASER DE CLASSE 1CAUTION VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN. AVOID EXPOSURE TO BEAMADVARSEL SYNLIG OG USYNLIG LASERSTRLING VED BNING UNDG UDSTTELSE FOR STRLINGADVARSEL SYNLIG OG USYNLIG LASERSTRLING NR DEKSEL PNES UNNG EKSPONERING FOR STRLENVARNING SYNLIG OCH OSYNLIG LASERSTRLNING NR DENNA DEL R PPNAD BETRAKTA EJ STRLENVARO ! AVATTAESSA OLET ALTTIINA NKYVLLE JA NKYMTTMLLE LASER STEILYLLE, L KATSO STEESEENVORSICHT SICHTBARE UND UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GEFFNET NICHT DEM STRAHL AUSSETSENDANGER VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN AVOID DIRECT EXPOSURE TO BEAMATTENTION RAYONNEMENT LASER VISIBLE ET INVISIBLE EN CAS DOUVERTURE EXPOSITION DANGEREUSE AU FAISCEAUDVD-C740/DV-C6660DVD-C740/DV-C66604I PREVENTION OF ELECTROSTATIC DISCHARGEI LOCALE 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 number of this DVD player, this DVD player cannot play this disc.This product incorporates copyrightprotection technology that is protected bymethod claims of certain U.S. patents andother intellectual property rights owned byMacrovision Corporation and other rightsowners. Use of this copyright protectiontechnology must be authorized byMacrovision Corporation, and is intendedfor home and other limited viewing usesonly unless otherwise authorized byMacrovision Corporation. Reverseengineering or disassembly is prohibited.qwrwttrwyetThe laser diode in the traverse unit (optical pickup) may be damaged due to static electricity from clothes or the humanbody. Use caution to prevent electrostatic damage when servicing or handling the laser diode.1. Grounding for electrostatic damage prevention1. Worktable groundingPut a grounded conductive material (sheet) or iron sheet on the area where the optical pickup is placed.2. Human body groundingUse an anti-static wrist strap to discharge the static electricity from your body.2. Handling of the optical pickup1. To prevent damage to the optical pickup replacement parts during transportation and before installation, both endsof the laser diode are short-circuited. After installing the new part, remove the short circuit according to the correctprocedure in this service manual.2. Do not use a tester to check the laser diode in the optical pickup. The power supply in the tester will damage thelaser diode.3. Handling Precautions for the Traverse Unit (Optical Pickup)1. Handle the traverse unit (optical pickup) gently, as it is an extremely high-precision assembly.2. The flexible cable lines may break if an excessive force is applied to it. Use caution when handling the cable.3. The semi-fixed resistor for laser power adjustment should not be adjusted. Do not turn the resistor.1MConductive material(sheet) or steel sheetAnti-static wrist strapDVD-C740/DV-C6660DVD-C740/DV-C66605I FRONT PANELSM DVD-C740 (U, A models)M DV-C6660 (U, A models)U onlyU model PROGRESSIVEA model SHUFFLEU onlyU model PROGRESSIVEA model SHUFFLEG DVD-C740/DV-C6660DVD-C740/DV-C6660DVD-C740/DV-C66606M DVD-C740 U modelM DVD-C740 A modelM DV-C6660 U modelM DV-C6660 A modelI REAR PANELSDVD-C740/DV-C6660DVD-C740/DV-C66607PLAYBACK SYSTEMDVD VideoDVD+RWDVD+RVideo CD and SVCDCD (CD-R and CD-RW)MP3 CDTV STANDARD (PAL/50Hz) (NTSC/60Hz)Number of lines625525PlaybackMultistandard(PAL/NTSC)VIDEO PERFORMANCEComponent Video output Y: 1Vpp into 75 ohmPr/Cr Pb/Cb: 0.7Vpp into 75 ohmS-Video outputY: 1Vpp into 75 ohmC: 0.3Vpp into 75 ohmVideo output1 Vpp into 75 ohmBlack Level ShiftOn/OffVideo ShiftLeft/RightAUDIO FORMATDolby Digital/Compressed DigitalDTS/MPEGPCM16, 20, 24 bitsfs, 44.1, 48, 96 kHzMP396, 112, 128, 256 kbps and(Joliet)variable bit rate fs 32, 44.1, 48kHzFull decoding of Dolby Digital and DTS multi channel soundAnalog Stereo SoundDolby Surround-compatible downmix from Dolby Digitalmulti-channel sound3D Sound for virtual 5.1 channel sound on 2 speakersAUDIO PERFORMANCEDA Converter24 bitsDVDfs 96 kHz2 Hz - 44 kHzCD/Video CDfs 44.1 kHz2 Hz - 20 kHzS-Video CDfs 48 kHz2 Hz - 22 kHzfs 44.1 kHz2 Hz - 20 kHzSignal-Noise (1kHz)105 dBDynamic Range (1kHz)100 dBHarmonic Distortion + Noise (1kHz)0.003%MPEG MP3MPEG Audio L3CONNECTIONSY Pb/Cb Pr/Cr (480i/p)Cinch 3x (green, blue, red)S-Video OutputMini DIN, 4 pinsVideo OutputCinch (yellow)Audio L+R outputCinch (white/red) x2Subwoofer outputCinch (black)Digital Output1 coaxial, 1 opticalIEC958 for CDDA / LPCMIEC1937 for MPEG1/2, DolbyDigital, DTSCABINETDimensions (w x h x d)435 x 116 x 425 mm(17-1/8 x 4-9/16 x 16-3/4)WeightApprox. 6 Kg (13 lbs 3 oz)POWER SUPPLYPower inputU.S.A. model120V, 60HzAustralia model240V, 50HzPower usageApprox. 20WPower usage standby 5WFinishDVD-C740Black Color (U, A models)DV-C6660Black Color (U, A models)Silver Color (U, A models)AccessoriesRemote Control, Batteries, Audio/Video Cable* typical playing time for movie with 2 spoken languagesand 3 subtitle languagesSpecifications subject to change without prior notice.Manufactured under license from Dolby Laboratories.“Dolby” and the double-D symbol are trademarks of DolbyLaboratories.“DTS” and “DTS Digital Out” are trademarks of Digital TheaterSystems, Inc.U . USA modelA . Australian modelI SPECIFICATIONS“DCDi” is a trademark of Faroudia, a division of Sage Inc.DVD-C740/DV-C6660DVD-C740/DV-C66608Unit : mm (inch)435 (17-1/8)116(4-9/16)425 (16-3/4)I INTERNAL VIEWq POWER SUPPLY UNITw CM UNITe CLAMPER ASSYr AV P.C.B.t Not applied to these modelsy TRAY ASSYu MONOBOARD P.C.B.I DIMENSIONSertqwyuDVD-C740/DV-C66609I DISASSEMBLY PROCEDURESSee exploded view for item numbersMountingDismountingA/V board 1001 Remove flex and cable connections. Remove 4 screws 275 (skt cinch ,optical to back- plate) and screw 280. (S-video to back-plate) Release 2 screw 190. (board to bracket) Dismount board.Front Standby board 2000 (3) Remove 2 screws 110. (Board to Front cabinet) Remove cable connection. Dismount board.Front Display board 2000 (1) Remove 8 screws 100. (Board to Front cabinet) Remove cable connections. Dismount board.Front Panel 0001 Remove cable connection. Unlock Front panel from frame by releasing successively 4 snaps. (2 on the side and bottom) Place Front panel in front of the set ( service position ).Top Cover 300 Remove 4 screws 310 and 3 screws 305 Lift top cover from rear side to remove.Power supply unit 1005 Remove cable connections. Remove 2 screws 185. (Board to bottom frame) Release spacer locking. (Board to bottom frame) Dismount board.Monoboard1020 Remove flex and cable connections from Changer module to Monoboard. Remove 4 screws 200. Dismount Monoboard.Front Eject board 2000 (2) Remove 3 screws 115. (Board to Front cabinet) Remove cable connection. Dismount board.Tray Assy Removes stopper screw 10 on the Tray. Open Tray (See instruction for manual eject of tray) Gently pull the tray out.CM Unit Remove AV board 1001 and Monobaord 1020. Remove 5 screws 150. (CM module to bottom frame) Dismount CM unitClamper Assy 0004 Remove 2 screws 12. (Clamper to CM unit ) Dismount clamper assy.Holder/VAM Assy Remove 2 screws 11. (Holder/VAM Assy to CM unit) Dismount holder/VAM assy.Motor driver board 1021 Flip the CM unit. Release 3 catches. Remove cable connections Dismount board.1.7 mmT62.7 mmT103.8 mmT20When disassembling, use the special screw driver with tip shape in figure.DVD-C740/DV-C666010Top Cover132TrayHOW TO MANUALLY EJECT THE TRAY1. Remove the Top Cover.2. Move the gear in the anti-clockwise direction with your finger until the tray is ejected.3. Gentlely pull the tray out.4Fig. 2Fig. AGPrecaution for installation of the Tray Assy.On Tray Assy setting.Check the Direction of marking “L” on gearaccording to this drawing.Gear/L0Front PanelGear/L01Marking1. Removal of Tray Assya. Remove 1 screw ( r ) in Fig. 1.b. Turn Gear/L0 as shown in Fig. 2 counter clockwisegradually until immediately before the tray starts tomove and stop it there.CAUTION:Gear/L0, if turned counter clockwise con-tinuously, will mesh with the gear of the trayand the tray will come out. When removingthe tray, use care so that Gear/L0 will notmesh with the gear of the tray.c. Pull out the Tray Assy.TrayGear/L0Fig. 12. Removal of Tablea. Remove 2 screws ( t ) and then remove theSupport/M in Fig. 3.b. Remove the Plate/Table in Fig. 3.c. Remove 1 screw ( y ) and then take off the Table inFig. 3.IMPORTANT: Installation of Table.Install the table according to the following procedure.1) Slide the Lever so that the Gear/RT becomesfree. (Fig.B)2) With the “L” mark on the Gear/RT alignedwith the same mark on the Tray, lock it withthe Lever. (Fig.B)3) Install the Table by aligning it to the thick lineon “ / ” mark. (Fig.3)*Check that the Table is locked after installation.LeverTrayGear/RT1Fit the Gear/RT to “L” mark.Fig. BFit the table to the thick line on “ / ” mark.tPlate/TableFig. 3yTableLockUnlocktSupport/M11DVD-C740/DV-C6660DVD-C740/DV-C6660I DIAGNOSTIC SOFTWARE1Dealerscript1.1Purpose of Dealer Script1.2Contents of Dealer ScriptThe dealer script executes all diagnostic nuclei that do not need any user interaction and are meaningful on a standalone DVD player.The nuclei called in the dealer script are the following (the