Yamaha-CDC775-cd-sm 维修电路原理图.pdf

CDC-775CDC-775100669SERVICE MANUALCOMPACT DISC PLAYERI CONTENTSTO SERVICE PERSONNEL .12REAR PANELS .3SPECIFICATIONS .4INTERNAL VIEW .4DISASSEMBLY PROCEDURES .56STANDARD OPERATION CHART .78TEST MODE .911ADJUSTMENT.12ERROR MESSAGES .1315IC DATA .1620DISPLAY DATA .21IC BLOCKS .2223PIN CONNECTION DIAGRAM .23BLOCK DIAGRAM .2425PRINTED CIRCUIT BOARD .2631SCHEMATIC DIAGRAM .32PARTS LIST .3342GREASE APPLICATION DIAGRAM.43REMOTE CONTROL TRANSMITTER.44This 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,certification or recognition of any applicable technical capabilities, or establish a principle-agentrelationship of 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 NOTICECDC-775、認定再生紙使用。This Service Manual uses recycled paper.SERVICE MANUALRadioFans.CN 收音机爱 好者资料库Copyright 2002 YAMAHA CORPORATIONThis manual is copyrighted by YAMAHA and may not be copied or redistributed either in print or electronically without permission.CDC-775CDC-7751. Critical Components Information.Components having special characteristics are marked andmust be replaced with parts having specifications equal tothose 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.EQUIPMENTUNDER TESTWALLOUTLETINSULATINGTABLEAC LEAKAGETESTER OREQUIVALENTCAUTION: USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSESPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.THE COMPACT DISC PLAYER SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT PROPERLYQUALIFIED SERVICE PERSONNEL.PROTECTION OF EYES FROM LASER BEAM DURING SERVICINGThis set employs a laser. Therefore, be sure to carefullyfollow the instructions below when servicing .1. Laser Diode PropertiesGMaterial: GaAlAsGWavelength: 780 nmGEmission Duration : ContinuousGLaser Output: max. 44.6 W* This output is the value measured at a distanceof about 200 mm from the objective lenssurface on the Optical Pick-up Block.2. When checking the laser diode emission, keep youreyes more than 30 cm away from the objective lens.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronicand/or plastic (where applicable) components may also contain traces of chemicals found by theCalifornia Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defectsor other reproductive harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTHFOR ANY REASON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhalesolder fumes or expose eyes to solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, washyour hands before handling food.I TO SERVICE PERSONNEL1RadioFans.CN 收音机爱 好者资料库CDC-775CDC-7752w R, G modelsEnglishTHIS PRINTING (SEE POSITION SHOWN IN THE ILLUSTRATION) INFORMS THE USER THAT THE APPARATUSCONTAINS A LASER COMPONENT.THIS LABEL (SEE POSITION SHOWN IN THE ILLUSTRATION) WARNS THAT ANY FURTHER PROCEDURE WILLBRING THE USER INTO EXPOSURE WITH THE LASER BEAM.CAUTION : USE OF CONTROLS, ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSESPECIFIED HEREIN, MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.SwedishDENNA MRKNING (SE FIGUR) UPPLYSER OM ATT DET I APPARATEN INGR EN LASERKOMPONENT AVTYP KLASS 1.VARNINGSMRKNING (SE FIGUR) FR STRLNING. INGREPP I APPARATEN BR ENDAST FRETAGAS AVFACKMAN MED KNNEDOM OM LASER. APPARATEN INNEHLLER EN LASERKOMPONENT SOM AVGERSTRLNING VERSTIGANDE GRNSEN FR LASERKLASS 1.VARNING: OSYNLIG LASERSTRLNING NR DENNA DEL R PPNAD : BETRAKTA EJ STRLEN.DanishDETTE MRKAT ER ANBRAGT SOM VIST I ILLUSTRATIONEN FOR AT ADVARE BRUGEREN OM AT AP-PARATET INDEHOLDER EN LASERKOMPONENT.DETTE MRKAT OM LASEREN ER ANBRAGT P APPARATET SOM EN OPLYSNING OM AT APPARATETINDEHOLDER ET LASERKOMPONENT.ADVARSEL : INDGREB BOR KUN FORETAGES AF EN FAGMAND DA DER ER RISIKO FOR RADIOAKTIVSTRLING.ADVARSEL : USYNLIG LASERSTRLING VED BNING.UNDG UDSAETTELSE FOR STRLING.FinnishVARO! :AVATTAESSA OLET ALTTIINA NKYMTTMLLE LASERSTEILYLLE. L KATSO STEESEEN.q R, G modelsCLASS 1 LASER PRODUCTCDC-775CDC-775I REAR PANELSMU, C modelsMR modelMA modelMG model3CDC-775CDC-7754CAUTION FORTRANSPORTING THIS UNITWhen transporting this unit, first removeall discs from the disc tray and close thetray by pressing the OPEN/CLOSE but-ton, and then switch off the power afteryou confirm that the display has turnedas follows.Never switch off the power if the displaydoes not turn as above, otherwise theunit will get out of order during transportbecause the internal mechanism is notlocked.5324I SPECIFICATIONSI AUDIO SECTIONOutput Voltage2.00.5VS/N Ratio115dBDynamic Range100dBHarmonic Distortion+Noise (1kHz)0.0025%Frequency Response (2Hz20kHz)0.5dBHeadphone Output150, 1kHz, 20dB Input20040mVI GENERALPower RequirementsU, C models120V AC 60HzG model230V AC 50HzA model240V AC 50HzR model110/120/220/240V AC 50/60HzPower Consumption20WDimensions (W x H x D)435 x 116 x 404 mm(17-1/8” x 4-9/16” x 15-7/8”)Weight5.8kg (12 lbs 12 oz)AccessoriesPin plug cordRemote control transmitterDry-cell: x2 (Size “AA”, R06)U . USA modelC . Canadian modelA . Australian modelG . European modelR . General model* Specifications subject to change without notice.I INTERNAL VIEW12543q P.C.B. MAIN (2)w CLAMP ASSYe CM-210 UNITr P.C.B. MAIN (1)t TRAY ASSY435 (17-1/8)16(5/8)100(3-15/16)116(4-9/16)394(15-1/2)404(15-7/8)4(3/16)6(1/4)G DIMENSIONUnit : mm (inch)CDC-775CDC-7755I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.)4. Removal of Tablea. Remove 1 screw ( t ) and then remove the Support/T as shown in Fig. 1.b. Remove the Plate/Table as shown in Fig. 1.c. Remove 1 screw ( y ) and then take off the Table asshown in Fig. 1.Fig. 21. Removal of Top Covera. Remove 4 screws ( q ) and also 3 screws ( w ) asshown in Fig. 1.2. Removal of Clamp Assya. Remove 2 screws ( e ) as shown in Fig. 1.3. Removal of Tray Assya. Remove 1 screw ( r ) as shown in Fig. 1.b. Turn Gear/L0 as shown in Fig. 2 counter clockwisegradually till 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 thetray and the tray will come out. When re-moving the tray, use care so that Gear/L0will not mesh with the gear of the tray.c. Pull out the Tray Assy.Fig. AIMPORTANT : Installation of Table.Install the table according to the following procedure.1) Slide the Lever so that the Gear/RT1 be-comes free. (Fig.B-1)2) With the “L” mark on the Gear/RT1 alignedwith the same mark on the Tray, lock it withthe Lever. (Fig.B-1)3) Install the Table by aligning it to the thick lineon “ / ” mark. (Fig.B-2)*Check that the Table is locked after installation.Fig. B-2GPrecaution for installation of the Tray Assy.On Tray Assy setting.Check the Direction of marking “L” on gearaccording to this drawing.Fig. 1Gear/L0Front PanelGear/L01LeverTrayGear/RT1Fit the Gear/RT1 to “L” mark.Fig. B-1TrayTableMarkingFit the table to the thick line on “ / ” mark.qqwTableTrayyTrayGear/L0rteTop CoverPlate/TableClamp AssySupport/TFront PanelLockUnlockCDC-775CDC-77565. Removal of CM-210 Unita. Remove 5 screws ( u ) as shown in Fig. 3.b. Remove connectors (CB201 & 202) and cables (CB1& 2, CB300) from the P.C.B. Main.c. Take the CM-210 Unit out slowly as shown in Fig. 3.6. Removal of PU Mechanism Unita. Remove 2 screws ( i ) and then remove the PUUnit Assy as shown Fig. 4.b. Pull out 4 Pins ( o ) and then remove the PUMechanism Unit as shown in Fig. 5.Fig. 5Fig. 4Fig. 3G Operation Check Procedureq Disassembly1) Remove the top cover.2) Remove the Clamp Assy.3) Remove the stabilizer from the Holder.Turn the Plate clockwise by 30 while holdingthe Stabilizer, and the Plate will come off.Remove the Stabilizer from the Holder.w Clamp the disc by using the stabilizer.e Set to the TEST mode and check for anyfaulty conditions.Fig. CPU MechanismUnitPU Unit AssyooHolderLockUnlockuuuCM-210 UnitiStabilizerFrame/ClamperPlatePlateCB201CB1CB2CB300CB202CDC-775CDC-775I STANDARD OPERATION CHART“OPEN” appears on the display.“TRV” signal is output until detection of LIMIT switch.if FLSW = L (IC301, pin 21) Proceed to next step. LSON = “H” (IC1, pin 3)Press OPEN/CLOSE key.Forced feed return operation.Clamp down operation.Tracking Offset auto ADJ.Focus Offset auto ADJ.Disc mechanism unit clamped up.Feed inward switch research.Laser ON.Disc scan.FOCUS Gain rough ADJ.FOCUS Search operation.Spindle motor accelerated.TRACKING servo ON.Disc servo ONVCO lock.Disc table reset. Tray open.Tray closed.Table rotate.Disc research.Proceeds to next step after detection of CLAMP switch. (SW400)Stop after detection of LOADING switch. (SW401)Proceeds to next step after detection of LOADING switch. (SW401)DISC “1” is turned to DM clamp position.Proceeds to next step after detection of CLAMP switch (SW401)Tracking Gain rough ADJ.Tracking Balance ADJ. (only Tray OPEN/CLOSE)FOCUS BALANCE ADJ.FOCUS LOCK servo ON.“DISC” flash.“DISC” from flashing to lighting.Load a disc in “DISC 1”.Press PLAY key or push the tray.FLOCK = “H” “L” (IC301, pin 8)TLOCK = “H” “L” (IC301, pin 7)7ACDC-775CDC-7758Press the STOP key.FOCUS GAIN ADJ.TRACKING GAIN ADJ.After searching the beginning, MUTE is cancelled.MUTE ON.TRACK search.After searching the beginning, MUTE is cancelled.MUTE ON.Spindle motor stop.Laser OFF.Forced feed return.*TOC READ Data fetch cycle *TRACK No. “1” is searched. PLAY Set to SEARCH by means of Y,Tkey. PLAY STOP : MUTE OFF = “H” “L”: MUTE OFF = “L” “H”, “0:00” appears on the display.: LSON = “H” “L” (IC1, pin 3): MUTE OFF = “L” “H”, “0:00” appears on the display. (IC301, pin 4): FLSW = “L” (IC301, pin 21)ACDC-775CDC-775I TEST MODEGStarting TEST modeTest mode is brought about when the power is turned on while the “PLAY/PAUSE” and “STOP”keys on the panel are simultaneously pressed and held.When the test mode is brought about, all the displays light up for about 1 second. (TEST on display)NOTE : To fully operate all test modes the remote control must be used.9GFunction List of Panel keys Note: “traverse servo” means the same as “feed servo”FUNCTIONTray open/close.Rotating the mode of coefficients. (Coefficient modeCoefficient settingProduct mode) Press-ing twice will set to the product mode.Plays if focus servo is effective. TRON, MUTE OFF.All stop. (Focus, spindle, feed, laser, tray, etc.) Initializes FL display.Backward traverse move. (If inner SW turns on, traverse is stopped.)(Coefficient set up mode : upper digit down.)Forward traverse move.(Coefficient set up mode : upper digit up.)Returns to product mode. (Tray and table inoperative.)Adjustment mode 1 (TR-offset, FO-offset, FO-rough gain adjustment)Adjustment mode 2 (TR-balance, TR-rough gain adjustment)Adjustment mode 3 (FO-fine gain, TR-fine gain, FO-balance adjustment)If not clamped up, measurement the rotating time of the turn table. (Slow speed) (Note 2 :See page 11)If clamped up, enter EQSW adjustment mode. (In adjustment mode, save EQSW value to EEPROM.)Decelerates or stops spindle.Output level down.(Coefficient set up mode : address down.) (EQSW adjustment mode : value down)Output level up.(Coefficient set up mode : address up.) (EQSW adjustment mode : value up)Returns to product mode. (tray and table inoperative.)Adjustment mode 1 (TR-offset, FO-offset, FO-rough gain adjustment)Adjustment mode 2 (TR-balance, TR-rough gain adjustment)Adjustment mode 3 (FO-fine gain, TR-fine gain, FO-balance adjustment)Turn table turns counterclockwise. (Slow speed)Turn table turns clockwise. (Slow speed)Turn table turns counterclockwise. (Fast speed)Turn table turns clockwise. (Fast speed)Backward 10 TRACK KICK-continuouslyForward 10 TRACK KICK-continuouslyPANEL KEYOPEN/CLOSEPLAYXCHANGEPLAY/PAUSESTOPTSKIPYSKIPDISC 1DISC 2DISC 3DISC 4DISC 5PROGOUTPUT LEVEL OUTPUT LEVEL +101234567NOTE:8NOTE:90NOTE:When the disc table is not positioned correctly, be sure to turn the disc table one full rotation by using the DISCSKIP key on the remote control unit before canceling the TEST mode.CDC-775CDC-77510G Function List of Remote Control TransmitterFUNCTIONTraverse stopTray open/closePLAY (FOON, TRON, TVON (FEON), SPON)Backward traverse move. (If inner SW turns on, traverse is stopped.)(Coefficient set up mode : upper digit down)Clamp down.(Coefficient set up mode : lower digit down)Clamp up.(Coefficient set up mode : lower digit up)Forward traverse move.(Coefficient set up mode : upper digit up)FOON, TROF (Enter focus search if focus servo is off.)Checks FL display. (Note 3 : See page 11)FOON, TROF, TVOF (FEOF) (Enter focus search if focus servo is off.)Rotates or accelerates spindle.Decelerates spindle.Backward 150 TRACK KICK continuouslyReturns to product mode. (Tray and Table inoperative.)Adjustment mode 1 (TR-offset, FO-off set, FO-rough gain adjustment)Adjustment mode 2 (TR-balance, TR-rough gain adjustment)Adjustment mode 3 (FO-fine gain, TR-fine gain, FO-balance adjustment)Forward 1 TRACK KICK continuouslyBackward 1 TRACK KICK continuouslyForward 30 TRACK KICK continuouslyBackward 30 TRACK KICK continuouslyForward 150 TRACK KICK continuouslyEnter coefficient set up mode.SPON (Spindle servo on.)Output level down.(Coefficient set up mode : address down.)