Kenwood-MDX-02-Service-Manual电路原理图.pdf

70%MD PERSONAL STEREO SYSTEMMDX-01/02SERVICE MANUAL©2000-12/B51-5691-00 (K/K) 332SOUNDPUSH OPENMD RECREPEATVOLUME/MULTI CONTROLTUNERFM/AMSTANDBY/TIMERMDTUNEMODESTOP/CDMENUPOWERSET/DEMOCD/ MDHighSpeedDubbingSystemTUNINGTUNINGMD PERSONAL STEREO SYSTEMDISC LOADING MECHANISMEJECTBEST HITSNote:Please contact KENWOOD service in your side ifyou want to get the AC power cord.In compliance with Federal Regulations, following arerepro-duction of labels on, or inside the porduct relating tolaser product safety.KENWOOD-Crop. certifies this equipment conforms to DHHSRegulations No.21 CFR1040. 10, Chapter 1, Subchapter J.DANGER : Laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM.FM 75K57AMGNDANTENNAANTENNAPHONESAC IN Front cabinet(OUTER) ass'y (A60-1942-08): L(A60-1943-08): R(A60-1944-08): D(A60-1946-08): H(A60-1947-08): SKnob B(K29-7900-08)Knob A(K27-7893-08): S(K29-7895-08): L(K29-7896-08): H(K29-7898-08): D(K29-7899-08): RTop plate R ass'y (A60-2059-08): DHLR(A60-2060-08): SDoor (A52-0914-08): DHLR(A52-0915-08): SDoor lens(B12-0408-08): L(B12-0409-08): R(B12-0410-08): D(B12-0412-08): H(B12-0413-08): SMD door (A52-0918-08)Handle (K01-0139-08)Rear cabinet (A02-2987-08): S(A02-2988-08): DHLRAC socket(E03-0375-08)Handle(REAR)(K01-0134-08): L(K01-0135-08): H(K01-0137-08): D(K01-0138-08): R(K01-0140-08): SAntenna terminal(E70-0114-08)Stereo jack(E11-0398-08)D:ORANGE, H:GREY, L:BLUE, R:RED, S:SILVERAM loop antenna (x1)(T90-0868-08) Remote control unit (x1)(A70-1440-08): DLH(A70-1441-08): R(A70-1442-08): SBattery cover (A09-1191-08)R6/SUM-3 batteriesAC plug adaptor(E03-0115-05)for remote (x2)RC-MDX0001AM loop antennastand (x1)(A09-1201-08)MDX-01/022CONTENTS / ACCESSORIESCONTENTS / ACCESSORIES.2DISASSEMBLY FOR REPAIR.3CIRCUIT DESCRIPTION.4ADJUSTMENT.8PARTS DESCRIPTIONS.9PC BOARD.10SCHEMATIC DIAGRAM.13EXPLODED VIEW.25PARTS LIST.27SPECIFICATIONS.Back coverContentsAccessoriesCaution on condensationCondensation (of dew) may occur insidethe unit when there is a great difference intemperature between this unit and the out-side.This unit may not function properly if con-densation occurs. In this case, leave theunit for a few hours and restart the opera-tion after the condensation has dried up.Be specially cautious against condensationin a following circumsatance:When this unit is carried from a place toanother across a large difference in tem-perature, when the humidity in the roomwhere this unit is installed increases, etc.Note related to transportationand movementBefore transporting or moving this unit,carry out the following operations.(1)Remove the CD or MD from the unit.(2)Press the 6key of the MD.(3)Wait for some time and verify that thedisplay becomes as shown in the figure.(4)Press the 6key of the CD.(5)Wait for some time and verify that thedisplay becomes as shown in the figure.(6)Wait a few seconds and turn the unitOFF.384221111171x3x27x17x110x16x26x25x2111111131212149x3MDX-01/023DISASSEMBLY FOR REPAIR1. How to Remove Front Cabinet1. Remove 6 screws(1) from the rear cabinet side.2. Remove 2 screws(2) fixed CD and the frontcabinet.3. Remove 3 screws(3) from the bottom front side.4. Move the front cabinet frontwards(4).2. How to Remove CD and Top Covers1. Remove 2 screws fixed CD and top covers(5).2. Remove 8 screws fixed the carrying handle(6x4) and the rear cabinet(7x4).3. Turn the antenna cap(8) to remove and lift thecarrying handle and CD mechanism(9).3. How to Remove MD Mechanism1. Remove the screw(0) fixed the AC inlet socket. 2. Remove 5 screws fixed the bottom cabinet(!x3)and the power transformer(x2).3. Move the main pcb frontwards(#).4. Remove 3 screws($) fixed the MD mechanism.MDX-01/024CIRCUIT DESCRIPTIONFor more information on each adjustment mode, refer toeach section of 5, “Electrical adjustment“.If other adjustment mode has been entered incorrectly,press the STOP key to exit the mode.The number 9 - 13 are not used for service. If thesemode have been entered incorrectly, press the STOPkey immediately to exit the mode. Specially, do not useEEP INITIAL. (E2PROM data has initialized if used it.)4.MD TEST MODE FOR ADJUSTMENT4-1 Entering the Test Mode (MD Mode2)While pressing the SKIP DOWN key, turn the AC on.4-2 Cancelling the Test ModeTurn the AC off.4-3 Key Operations for AdjustmentNo.LCDDESCRIPTIONSECTION1TEMP ADJUThe work of adjustment is unnecessaryin this mode.5-52LDPWR ADJULaser power adjustment.5-63LDPWR CHECLaser power check.5-64EFBAL ADJUTraverse adjustment.5-75TE B. ADJAutomatic EF balance adjustment.-6FBIAS ADJUFocus bias adjustment.5-87CPLAY MODEContinuous playback mode.4-58CREC MODEContinuous recording mode.4-69STT-LIMITCheck the mechanism start limitswitch position.-10JUMP MODETrack jump checking mode.-11SRV DAT REServo data reading.-12EEP MODEE2PPROM data reading or rewrite.-13EEP INITIALE2PPROM data initializing.-KEYSOPERATIONSKIP UP/DOWNSelect mode or adjustment value change.MD PLAY/PAUSEFix mode or adjustment value.STOPCancel the selected mode.SKIP UP Pickup moves outwards when pressed skip up key.SKIP DOWN Pickup moves inwards when pressed skip down key. Remote control only.4-4 Selection of Adjustment Test ModeWhenever the volume/multi-control knob is turned, theadjustment test mode is selected.1. INITIALIZATION1-1 How to Set InitializationInsert the power cord to AC outlet with pressing REPEATkey.1-2 Operation in Initialization modeDisplay shows INITIALIZE, and Standby mode aftermechanism check.The Display shows error code if mechanism has malfunc-tion.The until changes to shipment mode after RAM and back-up clear, disc out, and so.2. TUNER PRESET3-3 Key Function in Test ModeKEYCD PLAYSTOPMENUSKIP UPSKIP DOWNCD MODET-SERVO ON(05) uwT-SERVO OFF(03)Stop to CD operation(01)HI SPEED(double speed) uwNORSPEED: in playbackPlayback in STOP mode.Track up of CD.FF search of CD if key pressedmore 400ms.Pickup move outwards in STOPmode if key pressed more 400ms.Playback in STOP mode.Track down of CD. FB search of CD if key pressedmore 400ms.Pickup moves inwards in STOPmode if key pressed more 400ms.MD MODE 1Stop to operation.Change to mute-off.Choose the REC input;digital or analog in stopmode.Track up of MD.FF search of MD if keypressed more 400ms.Track down of MD.FB search of MD if keypressed more 400ms.3. TEST MODE3-1 TEST Mode SettingTEST MODESETTINGCDMD RECMD 1SKIP UPInsert the power cordFTC & Sub-Clockto outlet with pressingOscillation CheckBEST HITSevery left keyModeMD mode2SKIP DOWNFTC&Sub-Clock Oscillation Check ModeFTC test mode is after Sub-Clock Oscillation CheckMode(Internal Oscillation, Check of Period) Check Modeis 5 times maximum. FTC carries if 1 tlme OK.The unit is STOP mode after display shows error if 5times NG.No Oscillation îERR 1 Period NGîERR 2(FTC mode is factory use only)3-2 Test Mode CancelThe unit cancel the test mode after initialization if pull outpower cord.The unit cancel the test mode after no initialization ifpower off.Error CodeCDIn 1st figure “C“MDIn 3rd figure “M“CD Door SWIn 7th figure “S“P.CHBANDFREQ.P.CHBANDFREQ.1FM98.30MHz21AM531kHz2FM87.50MHz22FM87.50MHz3FM89.10MHz23FM87.50MHz4FM108.00MHz24FM87.50MHz5FM90.00MHz25FM87.50MHz6FM87.50MHz26FM87.50MHz7FM87.50MHz27FM87.50MHz8FM87.50MHz28FM87.50MHz9AM1602kHz29FM87.50MHz10AM999kHz30FM106.00MHz11AM630kHz31FM87.50MHz12AM1440kHz32FM87.50MHz13FM106.00MHz33FM87.50MHz14AM531kHz34FM87.50MHz15FM87.50MHz35FM87.50MHz16FM98.00MHz36FM87.50MHz17FM98.50MHz37FM87.50MHz18FM87.50MHz38FM87.50MHz19AM990kHz39FM87.50MHz20FM97.70MHz40AM945kHzTB/FB (07)In STOPmode.Selfcheck result shows2 figuresTG/FG (08)FE/RF (09)TE/VC (10)MDX-01/025CIRCUIT DESCRIPTION1. Setting of Continuous Playback Mode No.Key14¢Select CPLAY MODE 2Load disc3PLAYCPLAY MIDc=xxxx a=yy error (xxxx=C1 error, yy=ADIP error)CPLAY OUTc=xxxx a=yy error (xxxx=C1 error, yy=ADIP error)4STOPCPLAY MODE 2. Change of Playback Points(in continuous playback mode)No.KeyDisplay/FunctionDisplay/Function1PLAY2CPLAY INc=xxxx a=yy error (xxxx=C1 error, yy=ADIP error)PLAY3Carry out No.1 to 3 in the above table.45STOPCPLAY MODEEJECTDisc out1. Continuous Recording SettingNo.KeyDisplay/Function14 ¢Select CREC MODE2Load the recordable disc3PLAYCREC MID4PLAYCREC (zzzz) CREC address(0300h cluster=recording start point)5STOPCREC MODE 2. Change and End of Recording Points1Carry out No.1 to 3 in the above table SelectCREC MID2¢CREC OUT3PLAYCREC (zzzz) CREC address (0700h cluster=recording start point)4STOPCREC MODE6 5¢(2time)Select CREC IN7PLAYCREC (zzzz) CREC address (0300h cluster=recording start point)8STOPCREC MODEPLAYCREC MID9EJECTDisc out1.The recording start addresses of IN, MID, and OUT aredescribed below.IN30H clusterMID300H clusterOUT700H cluster2.An erasure prevention control is not detected in the testmode. Be careful not to enter the continuous recordingmode using a disc containing the data that should not beerased.3.Do not record continuously for more than five minutes.4.Take care that no vibration is applied during continuousrecording.5. ELECTRICAL ADJUSTMENT5-1Precaution during confirmation of LaserDiode emissionDuring adjustment, do not view the emission of a laserdiode from just above for confirmation. This may dam-age your eyes.5-2Precaution on handling of Optical pick-up(KMS-260B)The laser diode in an optical pick-up is easy to be sub-ject to electrostatic destruction. Therefore, solder-bridge the laser tap on the flexible board when han-dling the optical pick-up.4-5 Continuous Playback Mode4-6 Continuous Recording ModeWhen removing the flexible board from the connector,make a solder bridge in advance, then remove theboard. Be careful not to remove the solder bridge beforeinserting the connector. Moreover, take careful mea-sures against electrostatic destruction. The flexibleboard is cut easily. Handle the flexible board with care.5-3 Precaution during adjustment1)Perform the adjustment and confirmation marked with “O”in the order shown in the table when the parts below arereplaced.2)In the test mode, perform the adjustment. After adjust-ment is completed, cancel the test mode.3)Perform the adjustment in the order described.4)Use the following tools and measurement equipment.CD test disc TGYS-1Laser power meterOscilloscope (with bandwidth of more than 40 M)(Calibrate the probe before measurement.)Digital voltmeterThermometer5)Take care that VC and GND (ground) are not connectedon the oscilloscope when two or more signals are moni-tored on the oscilloscope. (VC and GND are short-circuit-ed in this case.)5-4Creating the recordable continuous recordingdiscThis disc is used for focus bias adjustment and error rateconfirmation. How to create the recordable continuousrecording disc is 4-6.OpticalBD boardpick-upIC6D101IC1,IC2,IC101.Temperature compen-sation offset adjustmentXOOO2.Laser power adjustmentOOXO3.Traverse adjustmentOOXO4.Focus bias adjustmentOOXO5.Error rate confirmationOOXOPick-upFlexible boardLaser tap5-5 Offset AdjustmentNo.KeyDisplay/Function14 ¢Select TEMP ADJU2PLAYTEMP=xx (yy)(xx=compensation data, yy=setting temperature)34 ¢Input “yy“ with present temp.4PLAY TEMP=SAVE in writing dataTEMP ADJU ST 5-6 Laser Power Check and AdjustmentLaser power setting in playback and recording modes.Preparation1. Remove the MD mechanism from the unit.2. Connect the digital voltmeter to IOP1 and 2 on X33 pcb.3. Remove the top plate from traverse unit.4. Remove the magnetic head.5. Remount the MD mechanism to the unitMDX-01/026CIRCUIT DESCRIPTION1. Recordable DiscNo.KeyDisplay/Function1Connect the oscilloscope to TE1 and VC in X33 pcb24¢Select EFBAL ADJU3Load the recordable disc4PLAYEFBAL MO-W5PLAYEF=$MOW64¢Write power adjustment. Adjust the waveform as follows.7PLAYDisplay shows EF=$MOR after EFB=xSAVEto save the data in E2PROM. Mode changes write to readFocus and disc servo are on. Tracking servo off.84¢Read power adjustment. Adjust the waveform as follows.9PLAYSave the data in E2PROM.Display shows EFBAL MO-PPLAYDisplay shows EF=$MOP (Pickup travels to search pits and tune the servo to on.)104¢Adjust the waveform as follows.11PLAYDisplay showsEFB=xSAVE to save the data in E2PROM.Display shows EFBAL CHAN 12EJECTUnload disc.2. Pre Master Test Disc(TGYS-1)No.KeyDisplay/Function1Load the disc(TGYS-1). EFBAL CD2PLAYPLAYEF=$CD servo is on 34¢Adjust the waveform as follows.4Save the data in E2PROM. Display showsEFB=xSAVE in brief time.EF PHASE5EJECTUnload disc.During this adjustment, the oscilloscope changes in unitsof about 2%. Adjust so that the waveform comes nearestto the specified value. (MO groove read power traverseadjustment)(Traverse waveform)Specification : A = BNotes :1.Data is erased during MO write when a recorded disc isused for this adjustment.2.If the traverse waveform is difficult to be monitored, con-nect an oscilloscope as shown in the figure below.(TE1)330k10pF(VC)Oscilloscope+-5-7 EF Balance(Traverse Adjustment)Connection :TE1VCOscilloscopeX33ADJUSTMENT+-V: 0.5V/div H: 10ms/divINPUT: DC mode+-Laserpower meterDigitalvoltmeterObjective lens ofoptical pick upIOP2IOP1X33ADJUSTMENT1. Laser Power AdjustmentNo.KeyDisplay/Function14¢LDPWR ADJULoad recordable disc2Load the disc and lazer on(a0.9mW) $xx read power(xx=power value)4 3EJECT PLAYUnload the disc and laser on5PLAYLDPWR CHECK61¡Move the pickup to check the laser power withlaser power meter sensor74¢Adjust “xx“ so that the power meter shows 0.9mW.8PLAY(a7.0mW) $xx writing power 94¢Adjust “xx“ so that the power meter shows 7.0mW.This adjustment should be carried out in 15 secs.10PLAYLaser power offDisplay shows LDPWR ADJUST after LDPWR<$xx to save the data in E2PROMStart from No.2 if readjust.2. Laser Power CheckNo.KeyDisplay/Function14¢LDPWR CHEC2PLAY(c0.9mW) $xx(xx=0.85 to 0.95mW)3PLAY(c7.0mW) $xxLaser power meter: 7.0±1.0mWVOM:optical pickup indication value ±10%In this case, lop = 82.5 mAlop(mA) = Reading of digital voltmeter(mV)/1()(optical pick-up label)KMS260B27x40B0825A/D keysEEPROM WriteM30624MG-308FPRELAYPOWER keyRESETLEDRemote keyLCD Back LightLCD CD MD DSPu-COMControl KEY1-3V.DET.SENSCLOSETUNER ON/OFF, SACLK,SADATAST, SD,PLLDOMD CESQSOLCDSDALCDCSLED0, LED1BL0,BL1REMOCONRESETRELAYSCLSDASCORCRXDCTXDLCDRSLCDSCLLCDRESSQCKMD RSTCLS SW CD POWER, LDC,HI SP. SCLK. CD CLK.XLAT.CD DATA.XRSTAC/BATTERYCD Door Control TUNER PLL IC SYSTEM IC LC75396NC TUNER SYSTEM ICMDX-01/027CIRCUIT DESCRIPTION6. Microprocessor: M30624M-308FP(IC401)6-1 Periphery Block DiagramN