Yamaha-MDX596-md-sm 维修电路原理图.pdf

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1、MDX-596MDX-596100718SERVICE MANUALMDX-596IMPORTANT NOTICEThis manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedures inherant to the industry, and more specifically YAMAHA Products, are alreadyknown and unders

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

3、l YAMAHA product owners that all service required should be performed by an authorizedYAMAHA Retailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any individual or firm does not constitute authorization, certification orrecognition of any applicable t

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

5、ions are, therefore, inevitableand specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contactthe distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your

6、body may have accumu-lated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).IMPORTANT:Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.MINIDISC RECORDERIC DATA . . . . . . . . . . . . .

7、. . . . . . . . . . . . . . . . . . 2534BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . 3537TEST POINT WAVEFORMS . . . . . . . . . . . . . . . 3839PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . 4046MD VOLTAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47SCHEMATIC DIAG

8、RAM . . . . . . . . . . . . . . . . . . 4850REMOTE CONTROL TRANSMITTER . . . . . . . . . . .51PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5261GREASE APPLICATION DIAGRAM . . . . . . . . . . . .62I CONTENTSTO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . 12REAR PANELS . .

9、. . . . . . . . . . . . . . . . . . . . . . . . . . . .2SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .3INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4DISASSEMBLY PROCEDURES . . . . . . . . . . . . . . 46ADJUSTMENT & TEST MODE . . . . . . . . . . . . .

10、 . 716SPECIAL TEST MODE . . . . . . . . . . . . . . . . . . . . . . .17ERROR DISPLAY . . . . . . . . . . . . . . . . . . . . . . . 1819TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . 2024+106172839405RNDMS/FPROGA - BREPEATDISPLAY?!SCROLL( )&A B CD E FG H IJ K LM N OP Q RSPACES T UV W XY Z/TI

11、TLESEARCHSKIPPLAYPAUSESTOPRECRECM-MARKMONO/STINPUTCHAR.NUMBERDELETESETERTYWDASCD-PSYNCTIMERadioFans.CN 收音机爱 好者资料库MDX-596MDX-596AC LEAKAGETESTER OREQUIVALENTEQUIPMENTUNDER TESTINSULATINGTABLEWALLOUTLETI TO SERVICE PERSONNEL1Critical Components InformationComponents having special characteristics are

12、marked Zand must be replaced with parts having specifications equalto those originally installed.R, G, B modelsR, G, B modelsWARNING: 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

13、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

14、) 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 inhazardous radiation exposure.Laser Emitting conditions:1) When the Co

15、ver (MD) is removed, and the POWER SW is turned to the ON position, the laser component will 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!I

16、f no disc is detected, the laser will stop emitting the beam. When a disc is set, you will not be exposed to any laseremissions.2) The laser power level can be adjusted with the VR on the pickup PWB, however, this level has been set by the factoryprior to shipping from the factory. Do not adjust thi

17、s laser level control unless instruction is provided elsewhere in thismanual. Adjustment of this control can increase the laser emission level from the device.Cover (MD)RadioFans.CN 收音机爱 好者资料库MDX-596MDX-5962I REAR PANELSM R modelM G, B modelsM A modelVARO!: AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OL

18、ET ALTTIINA NKYMTTMLLELASER-STEILYLLE. L KATSO STEESEEN.VARNING! : OSYNLIG LASERSTRLNING NR DENNA DEL R PPNAD OCH SPRREN R URKOPPLAD.BETRAKTA EJ STRLEN.Laser Diode PropertiesMaterial :GaAlAsWavelength :785 nmEmission duration :ContinuousPulse Durations and Max. Output at the lens of the Laser Pick U

19、p Unit ;Read mode :0.8 mW (Continuous)Write mode :Max 10 mW for 0.5s, Min. Cycle 1.5sANSI Class :Class 1* This output is the value measured at a distance of about 200 mm fromthe objective lens surface on the Optical Pick-up Block.Magnetic headOptical pick-upMDX-596MDX-5963I SPECIFICATIONSUnits : mm

20、(inch)265.9 (101/2)287.8 (115/16)15.2(5/8)6.7(1/4)435 (171/8)16(5/8)80(31/8)96(33/4)Digital audio systemSystemMiniDisc digital audio systemDiscMiniDiscRecording methodMagnetic field variation overwriteReading methodNon-contact optical pickup (using semiconductor laser)LaserSemiconductor laserLaser D

21、iode PropertiesMaterial: GaAIAsWavelength: 785 nmPulse time:Read mode .0.8 mW ContinuousWrite mode .max 10 mW 0.5Smin cycle 1.5SRepetitionRecord/playback timeMax. 80 minutes80 minutes (stereo)160 minutes (mono)RevolutionsApprox. 400900 rpm (CLV)Error CorrectionACIRC (Advanced Cross Interleave Reed-s

22、olomon Code)Sampling frequency44.1 kHz (32 kHz and 48 kHz signals converted to 44.1 kHzfor recording)CodingATRAC (Adaptive TRansform Acoustic Coding)Modulation systemEFM (Eight-to-Fourteen Modulation)Number of channels2 (stereo) or 1 (mono, for extended recording)Frequency Response5 20,000 Hz 0.5 dB

23、Signal-to-Noise RatioMore than 99 dB during playbackWow and FlutterBelow measurable limitInputsLINE IN (REC)Type: pin jackInput impedance: greater than 50 k-ohmsStandard input level: 300 mVDIGITAL IN (OPTICAL) 1/2Type: square optical connector jackOutputsLINE OUT (PLAY)Type: pin jackStandard output

24、level: 2.0 0.5 VrmsDIGITAL OUT (OPTICAL)Type: square optical connector jackPHONESStandard output level(Input 150 ohms shorted, 20 dB): 300 60 mVGENERALPower SuppliesA modelAC 240 V, 50 HzG, B modelsAC 230 V, 50 HzR modelsAC 110/120/220/240 V, 50/60 HzPower Consumption 18 WDimensions (W x H x D)435 x

25、 96 x 288 mm (17-1/8 x 3-3/4 x 11-5/16)Weight4.0 kg (8 lbs. 13 oz.)FinishTitanium color/Black colorAccessoriesRemote Control. 1Audio cord. 2Optical cord. 1Batteries (size AA, R6, UM-3). 2Specifications subject to change without notice.R : General modelA : Australian modelB : British modelG : Europea

26、n model* US and foreign patents licensed from Dolby LaboratoriesLicensing Corporation.MDX-596MDX-596I DISASSEMBLY PROCEDURES(Remove parts in disassembly order as numbered.)Fig. 24I INTERNAL VIEW1. Removal of Top Covera. Remove 4 screws ( q ) and 3 screw ( w ) in Fig. 1.2. Removal of Front Panela. Re

27、move 4 connectors.CB5, CB6, CB7, CB401b. Remove 3 screws ( e ) in Fig. 1.*Arrow marks ( ) are printed to identify the screws to beremoved.c. Remove 2 screws ( r ) in Fig. 1.3. Removal of MD Recorder Unita. Remove 1 connector.CB1b. Remove 4 screws ( t ) in Fig. 1.c. Remove 4 screws ( y ) in Fig. 2.qw

28、ertCB7CB6CB1CB401CB5qPOWER TRANSFORMERwMAIN (1) P.C.B.ePOWER SWITCHrMD RECORDER UNITtMAIN (2) P.C.B.Fig. 1qqTop CoverwMD Recorder UnitFront PanelrertMD Recorder UnittyySupport (Mechanism)MDX-596MDX-5965Disassembly of MD Recorder UnitRemove the MD Recorder unit according to Steps 1 and 3 of the disas

29、sembly procedure (page 4).Removal of Magnetic Head (Fig.4) Once the magnetic head is removed, it will be neces-sary to perform “Confirmation of magnetic headinstallation Position”. (See page 13.)1. Remove screw (A1).Cautiona. When removing the magnetic head, hold its base anddo not touch the magneti

30、c head itself or the leafspring.b. Place the magnetic head upside down.c. Use special care so as not to cause any damage tothe magnetic head when installing it.Removal of MD Main P.C.B. and MD Mechanism (Fig. 3)1. Remove 3 screws (K1) and then remove the Top Cover.2. Remove 2 screws (K2) and then re

31、move the Bottom Cover.3. Disconnect 3 flat connecting cables (K3).4. Disconnect the flexible P.C.B. for the optical pickup (K4).5. Disconnect a connector (K5).6. Remove 2 screws (K6) and then remove the MD MainP.C.B.7. Remove the spring (K7).8. Remove 1 screw (K8) and then remove the Side Cover.9. R

32、emove 4 cushions (K9) from the bosses of the MDMechanism.Fig. 4Fig. 3(K3)x2(K2)x12x 2mm(K1)x12x 3mm(K1)x12x 3mm(K1)x12x 3mm(K3)x1(K5)x1(K2)x12x 3mm(K6)x21.7x 3mm(K4)x1(K8)x12x 3mm(K7)x1Top CoverMD MechanismCushionCushionSide CoverMD Main P.C.B.Flexible P.C.B. for optical pickup (*1)Bottom Cover(*1)

33、After pulling off the flexible P.C.B. for the optical pickup from the connector, cover its end with aluminum foil or the like which is electrically conductive so as to prevent the optical pickup from beingdamaged by static electricity.PullPullSpring(K9)x2(K9)x2BossBoss(A1)x11.7x 5mmMagnetic HeadLeaf

34、 SpringMD MechanismMDX-596MDX-5966Fig. 5Removal of MD Loading P.C.B./Loading Motor (Fig. 5)1. Remove 1 screw (B1).2. Remove 3 hooks (B2) and then remove the MDLoading P.C.B.3. Remove 2 screws (B3) and then remove the LoadingMotor.(B3)x21.7x 3mm(B1)x11.7x 6mm(B2)x2(B2)x1MD Loading P.C.B.Loading Motor

35、Removal of Sled Motor/Optical Pickup Head (Fig. 6) Once the MD mechanism switch P.C.B. is removed, itwill be necessary to perform “Adjustment of Lead-inSwitch Position”. (See page 13.) Once the optical pickup head is removed, it will benecessary to perform “Confirmation of magnetic headinstallation

36、Position”. (See page 13.)1. Remove 3 screws (C1) and then remove the sledmotor.2. Remove the Optical Pickup Head.CautionUse care so as not to cause any damage to the gear.(The damaged gear will cause abnormal noise to occurwhile searching.)(C1)x21.4x 4.5mm(C1)x11.4x 5mmSled MotorMD Mechanism P.C.B.O

37、ptical Pickup HeadFig. 6Removal of Spindle Motor (Fig. 7) Once the spindle motor is removed, it will be neces-sary to perform “Pickup Rating”. (See page 14.)1. Remove 3 screws (D1) and then remove the SpindleMotor.Cautiona. Be careful not to scratch the gear.(Scratched gear will produce noises durin

38、g searching.)b.As the turn-table is magnetized, keep foreign objectsfrom being attracted.(D1)x31.4x 3mmSpindle MotorFig. 7MDX-596MDX-5967TEST MODE1. How to enter the test mode1) Press the POWER button while pressing the SET/ENTER button and the PLAY/PAUSE button.Version of microprocessor is displaye

39、d about 1 second.t s m 1 C * * e * *Version of EEPROM protect data (from 01)Version of microprocessor ROM (from 01)“EJECT” on display2) Load either a disc for reproduction or a disc for recording.“AUTO AJST” on displayG Extension cable (see connection diagram on page 14.)High reflecting discTDYS1 (S

40、ONY) for reproduction (P/No. TX945850)Low reflecting discCommercially available mini disc for recordingLow reflecting discMMD-318 for pre-adjustment (P/No. AAX04890) Clear disc for checking the head (P/No. AAX18050)TypeTest disc1. Extension P.C.B. for servicingAAX166602. 2-pin extension connector fo

41、r servicingAAX166203. 6-pin flat cable for servicingAAX166404. 5-pin flat cable for servicingTX9461905. 28-pin flat cable for servicingTX946220TypePart No.I ADJUSTMENT & TEST MODEPreparation before AdjustmentG Test discServicing ProcedurePerform adjustment and setup in the TEST mode. Specific adjust

42、ments and procedures vary depend-ing on the type of servicing performed.Type of servicingPICKUP replacementMagnetic head replacementMechanical unit replacement(including PICKUP)MD main PCB replacementMD microprocessor (IC1401)replacementMD LSI (IC1201) replacementRF IC (IC101) replacementEEPROM IC (

43、IC1402) replacementTEMP standardsettingTEMPqqqEEPROM settingvalue confirmationEEPROM SETqqwq_wwAUTO preliminaryadjustmentAUT YOBIwweqeeAUTOadjustmentAUTO AJSTeer_wrrAUTO AFBadjustmentAUT AFBrrt_ettEEPROM adjustmentvalue entry (*1)TEST mode cancelttywryyOperation confirmation(With AUTO main adjustmen

44、t done in advance)TEST-PLAYyyuetuuTEST-RECuquiryiiRequired itemNumbers in the table, e.g., q, w, e, indicate the order in which required items should be performed. means that item needs not be performed.(*1): The result of EEPROM entry is displayed at the end of the TEST mode.OK_EEPROM:Both setting

45、value and preliminary adjustment completed have been entered properly.WR_EEPROM:The setting value has been entered properly but not preliminary adjustment completed.Perform preliminary adjustment properly and then enter preliminary adjustment completed.NG_EEPROM:The setting value has not been entere

46、d.Check the MD microprocessor and EEPROM for connection.MDX-596MDX-59683. How to cancel test mode (Entry of EEPROM adjustment value)1) Be sure to perform AUTO preliminary adjustment, AUTO adjustment and AUTO AFB adjustment.( “COMPLETE” appears on the display)2) After completing above ajustments, pre

47、ss the REC button. (Entry to EEPROM initiates then.)The TEST mode is completed. ( “Test End” appears on the display)3) Press the EJECT button to take out the disc.4) Turn off the power.2. How to set to each modeEvery time the DISPLAY (forward) or EDIT (reverse) button is pressed, the mode changes. (

48、For operation of eachmode, refer to the section describing each mode.)Since this mode is not required for servic-ing , proceed to another mode promptly.*AUTO_AJST (AUTO adjustment)AUT_AFB (AUTO AFB adjustment)RST_YOBI (RESULT preparation)RESULT (RESULT)MNU_YOBI (MANUAL preliminary adjustment)MNU_AJS

49、T (MANUAL adjustment)EEPROM_SET (EEPROM setting)AUT_YOBI (AUTO preliminary adjustment)Panel keyFunctionCommand codeRECTEST mode end (entry of EEPROM)1FHEJECTEjectB3HDISPLAYMenu feeding in TEST mode (1) / (Feeding of menus mainly related to adjustment and EEPROM)B2HTITLEMenu feeding in TEST mode (2)

50、/ (Feeding of menus mainly related to continuous playback and continuous recording)B4HCHARA.Menu feeding in TEST mode (3) (Feeding of menus mainly related to INNER mode and JUMP SELECT)F2HEDITMenu feeding in reverse in TEST mode (Menu feeding in reverse in each TEST mode)A8HSET/ENTERFinalization of