Kenwood-DMCK3-md-sm 维修电路原理图.pdf

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1、SPECIFICATIONSPORTABLE MD PLAYERDMC-K3SERVICE MANUAL 1999-1/B51-5503-00 (K/K) 2837In compliance with Federal Regulations, following are reproduc-tions of labels on, or inside the product relating to laser productsafety.KENWOOD-Corp. certifies this equipment conforms to DHHSRegulations No. 21 CFR 104

2、0. 10, Chapter 1, Subchapter J.DANGER : Laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM.System . Mini disc digital audio systemRead method . Noncontact optical reading system (semicon-ductor laser)Sampling frequency . 44.1 kHzAudio compression . ATRAC (Adaptive Transf

3、orm Acoustic Coding)Number of channels . 2 channelsFrequency response . 20 Hz to 20,000 Hz ( 3 dB)Wow & flutter . Less than unmeasurable limit ( 0.001 %W.PEAK)Input/Output terminal . Remote control/Phones jackRated power output . 9 mW+9 mWPower sourceDC IN jack (45.1V): Specially provided AC adaptor

4、: Car battery adaptor (sold separately, DC-C70)DC 1.5V : Commercially sold AA alkaline battery (LR-6) 1DC 1.2V : Specially provided rechargeable battery (NB-150) 1(Charging time : About 3 hours)Battery life (Fully charge, with “PS on” setting ON)Specially provided rechargeable battery (NB-150) 1. Ap

5、prox. 7 hoursCommercially sold AA alkaline battery (LR-6) 1 . Approx. 8 hours?At 0.5mW+0.5mW output (32 load ).?Standard value during continuous use/charging in an temperature of25C.?Time of use may vary depending on battery maker, battery type, useenvironment, and temperatute.?Time will be shorter

6、when “PS off” Mode is set.Dimensions (not including protruding parts) W :99 mm (3-7/8”) H :17 mm (11/16”) D :75 mm (2-15/16”)Weight (Net). 115g (0.25 lb)not including the accessory rechargeable batter140g (0.31 lb)including the accessory rechargeable battery1. KENWOOD follows a policy of continuous

7、advancements in development. For reason specifications may be changed without notice.2. The full performance may not be exhibited in an extremely cold location (under a water-freezing temperature).NotesNotesNotesKENWOOD CORPORATION MADE IN JAPAN VOLUME + OPENDC IN 4 - 5. 1VPHONESBATTERY ( L6 .R6 .AA

8、 .AM3 ) 1 . 5VNI - MH BATTERY 1 . 2VINOPENHOLDLid assy(A53-2123-03)Dressing panel(A21-3741-04)Knob (K29-7476-03)Knob (K29-7478-04)Knob (K29-7477-04)Battery cover(A09-1118-03)Miniature phone jack(E11-0381-05)Metallic cabinet assy(A01-3664-03)Escutcheon(B07-2443-01)DC jack(E03-0357-05)Knob(K29-7475-03

9、)Illustration is DMC-K3(S).RadioFans.CN 收音机爱 好者资料库DMC-K32CONTENTS / ACCESSORIESAC adapter (1) *(W09-)Remotcon (1)(A70-1258-05)Stereo headphone (1) *(W01-)Stereo headphone (1) *(W01-0963-05)* Refer to parts list on page 17.Batteries : NB150 (1)(W09-1267-05)Carrying case (1)(W01-0938-05)ContentsAccess

10、oriesCautionSPECIFICATIONS .Top coverCONTENTS / ACCESSORIES .2CONTROLS .3DISASSEMBLY FOR REPAIR.4CIRCUIT DESCRIPTION.5PC BOARD .9SCHEMATIC DIAGRAM .11EXPLODED VIEW .15PARTS LIST.17ActionInsert a MD into the unit.Replace the disc with aprerecorded MD whenplaying it back.Replace the MD.Replace the MD.

11、SymptomCauseRemedyThe disc holder is not securelyclosed.The battery is depleted.HOLD status is engaged.The volume is at minimumlevel.The remote control or head-phones are disconnected.HOLD status is engaged.The battery is depleted.The remote control or head-phone plug is not securely in-serted.The d

12、isc holder is not securelyclosed.The disc is scratched or dam-aged or the recording is notgood.The unit is in a place wherethere is excessive vibration.You are using commercial re-chargeable battery.The unit has become hot be-cause of exposure to directsunlight etc.You are using another ACadaptor th

13、an the accessoryadaptor.The AC adaptors has becomedisconnected.Unit fails toturn ON.Close disc holder securely.Charge the battery.Deactivate HOLD status.Increase the volume.Insert plug securely.Deactivate HOLD status.Charge the battery.Insert plug securely.Close disc holder securely.Replace the MD.M

14、ove the unit to a placewhere there is little vibra-tion or set to “PS off”.Use the special recharge-able battery (NB-150)Wait until the unit hascooled to normal tempera-ture.Use the accessory ACadaptor.Connect the AC adaptorsecurely.There is nosound.The unit doesnot respondto key opera-tion.Sound sk

15、ips.TroubleshootingMessageMeaningThere is no MD in the unit.Nothing is recorded on thisMD.The *UTOC contents arefaulty.The disc is scratched or dam-aged, so playback is not pos-sible.“BLANK ”“noDISC”“ERROR ”Meaning of display messages*UTOC: A recordable MD has an area for recording so-called UTOC(Us

16、ers Table of Contents) data. The UTOC contains numberof tracks, playing time, written data, and other rewritableinformation.Battery doesnot charge.Resetting the unitThis system uses a microcomputer so it may malfunction due to externalnoise or interference. In such a case, unplug the power cord and

17、remove thebatteries, then plug the power cord again and insert the batteries again.Beware of condensationWhen water vapor comes into contact with the surface of cold materi-al, water drops are produced.If condensation occurs, correct operation may not be possible, or theunit may not function correct

18、ly.This is not a malfunction, however, and the unit should be dried.(To do this, turn the POWER switch ON and leave the unit as it is forseveral hours.)Be especially careful in the following conditions: When the unit is brought from a cold place to warm place, and there isa large temperature differe

19、nce. When a heater starts operating. When the unit is brought from an air-conditioned place to a place ofhigh temperature with high humidity. When there is a large difference between the internal temperature ofthe unit and the ambient temperature, or in conditions where conden-sation occurs easily.R

20、adioFans.CN 收音机爱 好者资料库DMC-K33CONTROLSKENWOOD CORPORATION MADE IN JAPAN VOLUME + OPENDC IN 4 - 5. 1VPHONESBATTERY ( L6 .R6 .AA .AM3 ) 1 . 5VNI - MH BATTERY 1 . 2VINOPENHOLDMODEHOLDHOLD switch6 (Play/pause) key5 (Volume up) key4 (Skip down) keyHOLD indicatorMain UnitPlay indicatorTrack number indicato

21、rBatteryindicator7 (Stop/off) keyCharge keyLCDDC IN jack(Extemal power jack)Battery cover (Volume down) keyOPEN slider? (Skip up) keyPHONES jackDisc HolderHOLDUsing the Clip?Clip the remote control unit to theedge of your bag or pocket.Remote ControlClipPress and release.PHONES jackHand strapattachi

22、ng hole? (Skip up) key4 (Skip down) keyMODE keyLCD6 (Play/pause) key7 (Stop/off) key Charge keyHOLD switch+ (Volume up) key (Volume down) keyThe mode changes each time theMODE key is pressed.The mode changes each time theMODE key is pressed.MODE key (Only by remote control operation)1 Fast forward/f

23、ast reverse(search)2 Changing the display mode3 Play Mode4 Changing the tone(BASS BOOST)5 Original display1 AUTO PLAY2 AUTO POWER SAVE3 Operating tone (Beep)4 Original displayUse this key to set playback-related features and other convenientfunctions. Please also read “Playback (Application)” and “C

24、onvenientfunctions” for details.When the MODE key is held de-pressed for more than 2 seconds:?To change one of the above set-ups after returning to the originaldisplay, restart from the step ofpressing and holding the MODEkey for more than 2 seconds.DMC-K34DISASSEMBLY FOR REPAIR1111211133733654x2x2S

25、1How to Remove Case1. Remove 7 screws(1).2. Slide the case to the opposite side of the battery case(2).How to Check PCB3. Rmove 7 screws(3x5,4x2) and unsolder the corner of pcb(5).4. Connect the ground wire to the LCD mounting hardware and the frame of the unit(6).5. Fix the switch 1 (ON mode) by th

26、e tape(7). And check the unit with standing it. 5DMC-K3CIRCUIT DESCRIPTION1. Main microprocessor : uPD784036GC831 (X33 : IC5)1-1 Microprocessor periphery block diagram(X33)1-2 Pin descriptionIC9IC7RE/SERVOCXA2523ARDSP/ATRACCXD2655BRSERIAL XLAT XRST FOK SQSY SENSQ6BEEP MIXERIC5Q17XSTBYBEEPBASS BOOSTB

27、assBoostIC12SEINMUTE SWIC8u-COMHEAD PHONES AMPMOTOR DRIVERS1-S3uPD784036GCPSWLA4801VBD6601KVTEPDOEPDIIC10BEMFU,V,WEPCSE2PROMEPSKAK93C45AVED1comSEG1-19LCD(SET)SP PWS CHG1 CHG2 ADP CHGOK BATTPOWER SUPPLY CONTROL/RECHARGEABLE CIRCUITPin No.NameI/ODescriptionFunctionH/L1XLATODSP IC (CXD2655BR) LATCH sig

28、nal2XRSTODSP IC (CXD2655BR) HARD RESET signal3XSTBYORF/SERVO IC (CXA2523AR) STAND BY signal4LDONOPICK UP LASER on/off signalL: LIGHTINGH: NON LIGHTING5BEEPOBEEP output/ to HP AMP6BASS BOOSTOAnalog bass boost controlL: BOOST ONH: BOOST OFF7RESET-com RESET8VDD-com +power supply 9X2O-com SYSTEM CLOCK O

29、SC port (out)10X1I-com SYSTEM CLOCK OSC port (in)11VSS-com GND12LCD DATAOLCD remocon display data serial output 13BEMFWISLED MOTOR comparator signal(W)14BEMFVISLED MOTOR comparator signal(V)15BEMFUISLED MOTOR comparator signal(U)1618S13OSLED MOTOR control signalfor DRIVER input port19NCOCIRCUIT DESC

30、RIPTIONDMC-K36Pin No.NameI/ODescriptionFunctionH/LSYSTEM POWER port20SPODSP IC (CXD2655BR)H: ONRF/SERVO IC (CXA2523AR)L: OFFMotor Driver/HP amp VCC2 power supply21CHG1ORechargeable circuit control signal H: RECHARGEABLE(SET UP POWER SUPPLY)L: NORMAL22CHG2ORechargeable circuit control signal H: RECHA

31、RGEABLE(START RECHARGEABLE)L: NORMALTEST1/023,24TEST0,1ITest mode settingHH: TEST1HL: TEST2/3LH: TEST42543SEG191OSets LCD segment output 19144NCO45VSS-com GND46TEST-com TEST port (CONNECT GND)47COMOSets LCD COMMON48EPSKOE2PROM CLOCK output49PW SWOHP amp power supplyH: ON(CONNECT HP. AMP POWER SUPPLY

32、 PORT)L: OFF50MUTE SWOHP amp mute controlL: MUTE ONH:MUTE OFF51PWSODRAM/LCD remocon power supply portH: ONL:OFF52EPCSOE2PROM LATCH signal53EPDIOE2PROM DATA signal54EPDOIE2PROM DATA signal55VDD-com +power supply56KEY0ISets key inputTAKE IN A/D57KEY1ILCD remocon key inputTAKE IN A/D58ADPIAdaptor DC de

33、tector TAKE IN A/D59CHGOKIRechargeable battery detector TAKE IN A/D60BATTIBattery DC input TAKE IN A/D61SEIN(REVERSE)ISLED ERROR signal (REVERSE)TAKE IN A/D62SEIN(FORWARD)ISLED ERROR signal (FORWARD)TAKE IN A/D63ADONOAVREF voltage output64AVDD-com A/D power supply65AVREF1-com A/D reference voltage i

34、nput66AVSS-com A/D GND67,68NCO69,70AVREF2,3-com D/A reference voltage input71JTYPEIH: EXCEPT JAPANL:JAPAN72HOLDIHOLD SW73XINTIDSP IC (CXD2655BR)H:XINT EDGE intercept inputL: EDGE INTERCEPT74SQSYIDSP IC (CXD2655BR)H:ADIP SYNC intercept inputL: EDGE INTERCEPT75LID SWILID OPEN SWH: CLOSEL:OPEN76SCLKODS

35、P IC (CXD2655BR) SERIAL CLOCK input77W.UPI-com WAKU UP inputH:EDGE interceptL: EDGE INTERCEPT78SENSIDSP IC (CXD2655BR) SENSE signal79SRDTIDSP IC (CXD2655BR) SERIAL DATA signal80SWDTODSP IC (CXD2655BR) SERIAL DATA signalDMC-K3CIRCUIT DESCRIPTION71-3 Voltage matrix key (u-COM pin | ,“ )2. TEST MODE* T

36、est mode I is required when disassemble or replace thelaser pickup and MD mechanism.* Test mode I and II are required when replace theE2PROM.* Need the remote control for adjustment procedure.How to Reset the Unit.* Connect the AC adapter to the wall outlet with pressing key.* Contents of initializa

37、tion.VolumeVOL 10RepeatOFFBass boostBOOST 1Remocon modeDISC/TRACK(title mode)Auto PlayOFFResume TNOTNO1Auto power saveONBeepONDisplay in Remocon ENGDisplay in unitEnPower off after display shows for 2 seconds2-1 TEST MODE I(Adjusting Mode)* Contents(to memorize the adjustment result to E2PROM)1) EF

38、Balance(automatic/manual)2) Focus Bias(automatic/manual)Note:Automatic adjustment only in this manual2-1-1 Setting1) Connect the #24(P_TEST1) and 23(P_TEST0) portsof IC5 to 2.8v(VDD) port. Next to AC adapter.Mode is STOP.Remote contTEST1Unito12) Press the SKIP UP key. To memorized the propervalue of

39、 FE balance automatically. Manual adjust-ment if press the SKIP DOWN key.2-1-2 Automatic FE Balance and FOCUS Bias Adjustment1) The FE balance setting value of the default starts aservo by the value which is memorized in E2PROM.Incidentally, there are 3 kinds of memoryarea(high/Low reflection Pit/Lo

40、w reflectiongroove)which store a balance setting value E2PROM.At the time of automatic adjustment this 3kinds ofareas are used appropriately according to a disc.* There is a setting range of 32 steps(00h-1Fh) in thebalance setting value. The default value areHigh reflection 51hLow reflection 10h(pit

41、)Low reflection 90h(groove)2) Display shows the following if automatic adjustmentproceeds.Remote cont WAIT O - O means in operation mode.Unito13) Adjustment is over if loading the pre recorded disc. Incase of the recordable disc, the servo will be 03mode. Read the TOC in lead area and read the head-

42、er and access lead -in area in CPLAY mode Remote cont WAIT O Unito14) Proceed pit area adjustment after TOC read if loadingthe recordable disc. Change to focus bias check afterTOC read if loading the pre recorded disc.Remote contWAIT O 5) Change to FOCUS Bias step after pit area adjustmentif loading

43、 the recordable disc.Remote cont WAIT O Unito12-1-3 Focus Bias Check1) The Focus bias will be adjusted automatically at thefocus bias points(+16,0,-16)Remote cont*80 OO left 2 figures:bias setting value +80h right 3 figures: C1 errorrate(OVR;4 figures)2) Display shows setting value+80h. Press thePLA

44、Y/PAUSE key to stop Automatic Adjustment.Remote cont*80 10changed valueTEST 1the play/pause key is pressedUnito1changed valueoothe play/pause key is pressed2-2 TEST MODE II (AUDIO SPEC)* Item of audio specification(use test disc TDYS1)1) Reference TNO 2: 1kHz sinewave,0dB,L &R, Emphasis off0Port vol

45、tage VSET 6KEYPIN 56 KEY06767440.4Key functionPort voltage VKey functionPort voltage VREMOCON 8KEY PIN 57 KEY1Key functionPort voltage VKey functionPort voltage VKey functionNon remocon0.81.200.210.460.731.021.622.42.8VOL.DOWNVOL.UPKEY OFFVOL.UP11.61.92.23VOL.DOWNMODEHOLDExist remocon2.572.8CIRCUIT

46、DESCRIPTIONDMC-K382) Frequency ResponseTON 3: 40Hz sinewave,0dB,L&R,Emphasis off3) Modulation NoiseTON 6: 20kHz sinewave,0dB,L&R,Emphasis off4) Noise RatioTON 7: 40Hz Infinity Zero,- dB,L&R,Emphasis off5) Channel SeparationTON 8: 1kHz sinewave,0dB,L,Emphasis off6) Channel SeparationTON 10: 1kHz sine

47、wave,0dB,R,Emphasis off7) DeemphasisTON 13: 16kHz sinewave,-9.04dB,L&R,Emphasison2-2-1 Procedures1) Connect #23(P_TEST0) of IC5 to 2.8V(VDD) and#24(P_TEST1) of that to GND. Next Connect ACadapter to the unit.(the unit will be in CPLAY modeafter TOC reads)Remocon TEST 4Unito42) The unit will be in CP

48、LAY after TOC reading.Remocon TOC OKUnito43) Choose and playback TNO-02 on the disc byPLAY/PAUSE keyRemocon 02playback TNOUnito44) Choose and playback every TNO in the above tableby PLAY/PAUSE key. TNO will be chosen TNO 02 ifrepressing the PLAY/PAUSE key after STOP keypressed,Remocon 03playback TNO

49、Unito4ACEGIBDFHJ2135746Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD(Component side view)PC BOARD(Foil side view)910S2IC7IC5IC8IC12IC10Q14Q6D5D1Q13IC13D10Q9S8S7S4S5S6S3CN2STOPVOLUMEVOLUMEPLAYCN1ED1IC9C36R52C32L6R30R49R31R62C66C25C30L5C67C47C57C7X2X1C53C34C41C23C56

50、R48R55C29C54C31R54R53R1L4C37C35R65C65C50R46R41R43C39C40R42R40C27R67R27R108R109R45R15C111C110R58R47R63C24R100R101R111R110C38C12R72R38R21R29R36R28C62C21C20C19C9R17R66R24R25R26R35R34C43C44C15C14C11L2C63C33C52C42C45C49C26C5C46R13C64C59C58C61R39C16R51C28C51513418185421408061604112076100502625175511121324