Kenwood-DMVH7-md-sm 维修电路原理图.pdf

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1、MINI DISC RECORDERDM-VH7SERVICE MANUAL 1999-6/B51-5544-00 (K/K) 363270%646609608606617607619660rec levelrecordingejectstandbyenterstopreco.t.e.on/standbymodedisc loading mechanismminidisc recorder DM-VH720bit A/D&D/A converter654601A1-A2611602J1J3632610DIGITAL INOPTICALSYSTEMCONTROLLRRECINPLAYOUT12K

2、nob(K29-7554-04)AC power cord bushing (J42-0083-05)AC power cord *(E30-)Metallic cabinet (TOP)(A01-3696-01)Optic receiving module(W02-1181-05)Panel(A29-1051-14)Dressing panel(A21-3762-13)Knob *(K29-)Front glass(B10-3486-03)Side plate R(A50-1326-02)Rectangular receptacle(E08-0312-05)Phono jack(E63-10

3、65-05)Metallic cabinet(BOTTOM)(A01-3698-01)Side plate L(A50-1327-02)Indicator(B12-0361-04)Insulator assy(J02-1444-14)Dressing panel (BOTTOM)(A21-3758-02)Dressing panel (TOP)(A21-3757-12)Do not face the light of laser when a repair or action confirmation are done.* Refer to parts list on page 27.Refe

4、r to X-VH7 service manual (B51-5532-00), if need Disassembly for repair.DM-VH7(K) COVER1,1P( 99.10.29 2:43 PM yW 2RadioFans.CN 收音机爱 好者资料库2ABC13DEF5JKL6MNO4GHI8TUV9WXY7PRSEDITCANCEL0QZ,: ?+10&( )- /+100RANDOMREPEATCHECK/SPACEP.MODE/CHARAC.CLEARDELETEEDITSETENTER87?14?REC MODETIME DISP.TITLE SEARCHMON

5、ITORREMOTE CONTROL UNITRC-M0708O.T.E.?PLAY?TITLEINPUTREC INPUTPOWERAudio cord (2)(E30-0615-05)(A70-1279-05)(J02-0130-05)(J19-5996-02)Battery cover (A09-1106-08)(E30-2628-05)(B19-1529-05)(W01-0084-05)System control cord (1)Optical fiber cable (1)Remote control unit (1)Batteries (R6/AA) (2)Check that

6、the following accessories are present.Spacer (1)Replacement front feet (2)Allen wrench (1)DM-VH72CONTENTS / ACCESSORIES / CAUTIONSCONTENTS / ACCESSORIES / CAUTIONS. 2CIRCUIT DESCRIPTION.3MECHANISM DESCRIPTION.11PC BOARD . 14SCHEMATIC DIAGRAM . 16EXPLODED VIEW .25PARTS LIST.27SPECIFICATIONS .Back cov

7、erContentsAccessoriesCautionsSystem configurationOperation to resetThe microprocessor may fall into malfunction (impossibilityto operate erroneous display, etc.) when the power cord isunplugged while power is ON or due to an external factor.In this case, execute the following procedure to reset them

8、icroprocessor and return it to normal condition.Unplug the power cord from the power outlet then, whileholding the eject (0 eject) key depressed, plug the powercord again.?Please note that resetting the microprocessor clearsthe contents stored in, it returns the microprocessor tothe condition when i

9、t left the factory.Note related to transportation andmovementBefore transporting or moving this unit, carryout the following operations.1. With no disc loaded in the unit, press the “on/standby” key to on.?Check that no disc is present in the unit.2. Wait a few seconds and verify that the displaysho

10、wn appears.3. Press the “on/standby” key to off (standby).CAUTION :Use of controls or adjustments or performance of proce-dures other than those specified herein may result inhazardous radiation exposure.In compliance with Federal Regulations, following are re-productions of lables on, or inside the

11、 product relating tolaser product safety.For the U.S.A.- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -KENWOOD CORPORATION2967-3, ISHIKAWA-CHO,HACHIOJI-SHI, TOKYO, JAPANKENWOOD CORP. CERTIFIES THISEQUIPMENT CONFORMS TO DHHSREGULATIONS NO. 21

12、 CFR 1040.10,CHAPTER 1, SUBCHAPTER J.- - - - - - - - - - -Location: Back PanelCD RECEIVERCASSETTE DECKSPEAKERSVH-600RD-VH7LS-VH7VH-700RD-VH7X-VH7LS-VH7DM-VH7(K) COVER1,1P( 99.10.29 2:43 PM yW 3RadioFans.CN 收音机爱 好者资料库DM-VH73CIRCUIT DESCRIPTIONBackup itemInitialization MONITOROFF REC INPUTANALOG REC I

13、NPUT/ LEVELANALOG=-12dB REC modeTNO MARKAUTOTNO MARK LEVEL0(-55dB)(MD ucom)1. Backup and initialization2. MD microprocessor M30620MC-340FP(X25: IC11)2-1 Micoprocessor periphery block diagram The case of the system connection dont memoriseREC INPUT,REC LEVEL and stand up the sameinitialization. Syste

14、m ON/OFF and POWERON/OFF are memorised the last selector position. The case of DISC exist editing record : the set dontread TOC at AC power on_ Setting of the initializationWhile pressing the EJECT key, plug an AC power cordinto AC outlet.No backup itemInitializationPLAY modeTRACK MODEREPEATOFF(MECH

15、A ucom)Backup itemInitializationDISC editing recordUTOC informationDINAIN AOUTUARTA/DINTPWMPWMSIOMechanism unit(X33)IC24MECHA uCOMHD6432227N01FAMain uCOMM30620MC-340FP(X25)IC12DISPLAYLCD driver(64 x 64 full_dot)LCD moduleHD6433297A17FuCOMstandbyejectrecREMKey matrix(2 x 6)Back upcircuitDin1Din2RECPL

16、AYSL16volMUTE(X25)IC11DM-VH7(K) COVER1,1P( 99.10.29 2:43 PM yW 6DM-VH74CIRCUIT DESCRIPTIONPin No.NameI/ODescription1VOL_DTOElectric VOL IC communication data2VOL_CKOElectric VOL IC communication clock3-ONot used4DISP_CEODisplay ucom communication CE5DISP_OUTODisplay ucom communication data output6DI

17、SP_INIDisplay ucom communication data input7DISP_CLKODisplay ucom communication clock8BYTE-Ucom mode data bus setting9CNVss-Ucom mode inner ROM10,11-Not used12RESETIUcom reset13XoutOUcom oscillation 10MHz output14Vss-GND15XinIUcom oscillation 10MHz input16Vcc-Power supply17NMI-Ucom compulsion thrust

18、 18-ONot used19CEIUcom CE20REMIRemote control input21DISP_RSTODisplay ucom reset22LCD_BLOLCD backlight (Dimmer)23POWEROPower supply circuit H: ON24LED_EJECTOLCD EJECT(Dimmer)25BACK_V_CHKOBackup voltage check circuit H: ON26BACK_V_ONOBackup charge H: ON27MECHA_CEOMD mecha. ucom CE28MECHA_RSTOMD mecha

19、. reset L: RESET ON29MECHA_RXDIMD mecha. communication input30MECHA_TXDOMD mecha. communication output(N-ch)3134-Not used35TIRLER_TXDOTitular communication output36TIRLER_RXDITitular communication input37SDATAI/OSerial data (SL16)38SBUSYI/OSerial busy (SL16)39RDYIExtension bus control40-Not used41HO

20、LDIExtension bus control4261-Not used62Vcc-Ucom power supply (5V)63-Not used64Vss-Ucom power supply (GND)6574-Not used75AMUTEOAnalog mute76,77-Not used78LED_RECOLED REC79-Not used80LED_STBYOLED STANDBY8188-Not used8991KR02IKey return92BACK_VIBackup voltage check93INISWIDestination switch H: except J

21、 type94XY_POSITIONIX-Y position95I_PROTECTIONICurrent protection96AVss-A/D power supply (GND)97-Not used98Vref-A/D reference voltage (5V)99AVcc-A/D power supply (GND)100VOL_LENOElectric VOL IC communication data latch2-2 Pin descriptionDM-VH7(K) COVER1,1P( 99.10.29 2:43 PM yW 7DM-VH75CIRCUIT DESCRIP

22、TIONVoltage(V)KR0 (89)KR2 (91)KR1 (90)Thresholdvoltage(V)5.00(no key on)(no key on)(no key on)4.594.17-eject-3.753.33power/standbyo.t.e.-2.922.50stopff/level_up-2.091.67downup-1.250.88fb/level_downplay/pause-0.420.00recmode-2-3 Key matrix3. MD mechanism microprocessor HD6432227N01FA(X33: IC24)3-1 Mi

23、croprocessor periphery block diagram(X33)CI2(X33)IC24MNT0ATRACMD ucomAD/DAMNT1CXD2654RMNT2MNT3(X25)IC11SWDTSCLKCTXDXLATCRXDSRDTSENSXRSTSQSYDQSY(X33)IC12RECPXINTADDARSTTXEMPHALDONCXA2523ARRMSHMUTE(X33)IC6SRVMODE2PROMMECHARF ampSCLSDAPOWERIDSWMUTEHEADPOSMUTE_BARMDM-06DISCINRESETSTTLMTCELOADINLOADOUTBI

24、TRATEDM-VH7(K) COVER1,1P( 99.10.29 2:43 PM yW 10DM-VH76CIRCUIT DESCRIPTIONPin No.NameI/ODescription1SCLOE2PROM clock2SDAI/OE2PROM data311-ONot used12VCC-VDD/power supply13-Not used14VSS-GND1530-Not used31SRVMODOX-Y position output3234-Not used35MUTE_BAROMute L:MUTE ON36POWEROPower ON/OFF (Periphery

25、circuit power supply ) 37MUTEOMute38ADDARSTOAD / DA converter reset39EMPHAOEmphasis40LOADINOMecha. loading motor IN direction moving41LOADOUTOMecha. loading motor OUT direction moving42AVSS-A/D GND43STTLMTIPickup position switch44DISCINIDISC insert detection45-Not used46BITRATEIMD ucom communication

26、 speed changeover47HEADPOSIHead position (PLAY/REC) switch (AD) 48IDSWIMecha. DISC protection/high reflection/low reflection switch (AD) 4952-Not used53Vref-A/D reference voltage54AVCC-A/D power supply55,56MODE0,1IVDD/mode (MD0,MD1,MD2)=(1,1,1)57,58-Not used59RESETIReset input60NMIIVDD/non mask able

27、 thrust 61STBYIVDD/hardware standby input62VCC-VDD/power supply63XTALIClock inverse input64VSS-GND65EXTAL-Clock input66FWEIGND(Flash ROM writing permission)67MODE2IVDD/mode (MD0,MD1,MD2)=(1,1,1)6874-Not used75CEIUcom CE76CTXDOMD ucom transmit data77CRXDIMD ucom receive data78DQSYIDIN sub-Q thrust79,

28、80-Not used81SQSYIEFM/ADIP SYNC thrust82XLATOACRIC/ATRAC en/decoder IC latch 83SWDTOACRIC/ATRAC en/decoder IC output data84SRDTIACRIC/ATRAC en/decoder IC input data85SCLKOACRIC/ATRAC en/decoder IC clock86HMUTEOPull up/over writing head mute output (TX inverse) 87SENSIACRIC/ATRAC en/decoder IC SENS (

29、inner status) 88MNT3IACRIC/ATRAC en/decoder IC spindle rock89MNT2IACRIC/ATRAC en/decoder IC busy90MNT0IACRIC/ATRAC en/decoder IC FOK3-2 Pin descriptionDM-VH7(K) COVER1,1P( 99.10.29 2:43 PM yW 117DM-VH7CIRCUIT DESCRIPTIONPin No.NameI/ODescription91MNT1IACRIC/ATRAC en/decoder IC shock (track jump) det

30、ection92XINTIATRAC thrust9395-Not used96TXOACRIC/ATRAC en/decoder IC TX (Recording data output enable)97RECPOACRIC/ATRAC en/decoder IC RECP (Laser power changeover)98XRSTOACRIC/ATRAC en/decoder IC reset99LDONOLaser ON100RMSOPickup frequency changeoverPin No.NameI/ODescription1DOOCommunication data o

31、utput2DIICommunication data input3CLKICommunication clock input4RESETIUcom reset5NMII(Non mask able thrust)6Vcc-Ucom power supply7STBYIUcom standby8Vss-Ucom power supply)GND)9XTAL-ucom OSC(16MHz)10EXTALIucom OSC(16MHz)11MD1IUcom mode MD0/MD112MD0IUcom mode inner ROM extension mode :13AVss-Ucom A/D p

32、ower supply(GND)1421-Not used22AVcc-Ucom A/D power supply2330-Not used31Vcc-Ucom power supply 3239-Not used40Vss-Ucom power supply (GND)4147-Not used48A0OLCD drive control4956D0D7I/O LCD drive control57-Not used58LATICommunication latch /thrust59-INot used60RDOLCD drive control61WROLCD drive control

33、62CS1OLCD drive control63-Not used64-Not used(Pull up)4. LCD display microprocessorHD6433297A17F(X25:IC12)4-1 Description3-3 Port controlEBITRATE (46 pin): UART communication speedchangeoverEHEADPOS(47pin): Head position detectionInput voltageBit rateVref 1.09600bpsVref 0.814400bpsVref 0.628800bpsVr

34、ef 0.433600bpsVref 0.238400bpsVref 0.019200bpsInput voltageHead positionVref 1.0OFFVref 0.62PLAY positionVref 0.45REC positionEIDSW(48 pin): DISC type detectionInput voltageDISC typeVref 1.0LOW REFLECTION DISC(PROTECT ON)Vref 0.69LOW REFLECTION DISC(PROTECT OFF)Vref 0.32HIGH REFLECTION DISC1p 99.10.

35、29 3:45 PM y W 4DM-VH7CIRCUIT DESCRIPTION8KeyDescriptionO.T.E.LCD (LED) all on (blink) or off (off)STOPCancel of modeKeyOperationUP/DOWNSelect parameter and mode.PLAYFix items. Change of display in every check.STOPCancel or back of test mode.KeyOperationDOWN(SHIFT+) Select servo of PIT or GROOVEPLAY

36、(SHIFT+)Servo onRECPickup stops to move. Skip modes.STOP(SHIFT+)Servo offMODEDisplay change.UP(SHIFT+)Servo on/offF FPickup moves outwards when press FF keyF BPickup moves inwards when press FB key(SHIFT+): Show the SHIFT on the display by pressing the O.T.E. key1. Setting of Continuous Playback Mod

37、e No.Key1 UP/DOWN Select CPLAY MODE 2Load disc3 PLAYCPLAY MID c=xxxx a=yy error (xxxx=C1 error, yy=ADIP error)4 MODECPLAY(zzzz) CPLAY address(MID=0300h, OUT=0700h, IN=0030h cluster)5 MODEh8888d address (8888=current head address, =ADIP address)In No.5, Display shows - if cant read disc.2. Change of

38、Playback Points(in continuous playback mode)No.KeyDisplay/FunctionDisplay/Function1 PLAYCPLAY OUT2Carry out No.4 and 5 in the above table.3 PLAYCPLAY IN4Carry out No.4 and 5 in the above table.5 STOPCPLAY MODE6 EJECTDisc out1. Continuous Recording SettingNo. KeyDisplay/Function1 UP/DOWN Select CREC

39、MODE2Load the recordable disc3 PLAYCREC MID4 PLAYCREC (zzzz) CREC address(0300h cluster=recording start point)5 MODEh8888d address6 MODEc=xxxx a=yy error7 MODECREC (zzzz)8 STOPc=xxxx a=yy 2. Change and End of Recording Points1Carry out No.1 to 3 in the above table SelectCREC MID2 UPCREC OUT3 PLAYCRE

40、C (zzzz) CREC address (0700h cluster=recording start point)Carry out No.5 to 8 in the above table4Carry out No.1 to 3 in the above table5 PLAYSelect CREC MID6 UP(twice)Select CREC IN7 PLAYCREC (zzzz) CREC address (0300h cluster=recording start point)Carry out No.5 to 8 in the above table8 EJECTDisc

41、outStarting address is the followings.IN=30h cluster, MID=300h cluster, OUT=700h clusterLCD DisplayDescriptionsPLAY(logo)Servo onPAUSE(logo)Tracking servo onREC(logo)Record (laser write power)GRVServo groove modeCLV-SRough servo clockCLV-ASpindle lockRECORDRecordable disc or no discFor more informat

42、ion on each adjustment mode, refer toeach section of 6, 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

43、mode. Specially, do not useEEP INITIAL. (E2PROM data has initialized if used it.)5-4 Selection of test mode13 test modes are selected by pressing UP/DOWN keys.1. The recording start addresses of IN, MID, and OUTare described below.IN30H clusterMID 300H clusterOUT 700H cluster2. An erasure prevention

44、 control is not detected in thetest mode. Be careful not to enter the continuousrecording mode using a disc containing the data thatshould not be erased.3. Do not record continuously for more than fiveminutes.4. Take care that no vibration is applied duringcontinuous recording.No. DisplayDescription

45、Section1TEMP ADJUSTThe work of adjustment is 6-5 unnecessary in this mode2LDPWR ADJUST Laser power adjustment6-63LDPWR CHECKLaser power check 6-64EFBAL ADJUSTTraverse adjustment6-76FBIAS ADJUSTFocus bias adjustment6-85TE B. ADJUSTAutomatic EF balance adjustment.7CPLAY MODEContinuous playback mode5-5

46、8CREC MODEContinuous recording mode5-69STT-LIMIT SWCheck the mechanism start limit SW position 10 JUMP MODETrack jump checking mode11 SRV DAT READServo data reading12 EEP MODEE2PPROM data reading or rewrite13 EEP INITIALE2PROM data initializing5. TEST MODE5-1 How to Setting and Cancel Test ModeSetti

47、ng: While pressing the ON/STANDBY and MODEkeys, insert the power cord to the wall outlet.Cancel: Pull out the power cord.Mechanism InitializationSetting: While pressing the EJECT key, insert the powercord to the wall outlet.Display shows INITIALIZE. Mechanism is in normalmode after unload the disc i

48、f it loadedDisplaySetting: While pressing the MODE key, insert the powercord to the wall outlet.Cancel: Pull out the power cord.Key Operation for Ajustment5-2 Remaind Keys OperationCaution: Data of E2PROM will be erased if pressed O.T.E. key for more 3seconds.5-3 Display of Mechanism operation in Te

49、st Mode5-5 Continuous Playback Mode5-6 Continuous Recording Mode1p 99.10.29 3:45 PM y W 5DM-VH7CIRCUIT DESCRIPTION96. Electrical adjustment6-1 Precaution during confirmation of Laser DiodeemissionDuring adjustment, do not view the emission of a laserdiode from just above for confirmation. This may d

50、amageyour eyes.6-2 Precaution on handling of Optical pick-up(KMS-260B)The laser diode in an optical pick-up is easy to be subjectto electrostatic destruction. Therefore, solder-bridge thelaser tap on the flexible board when handling the opticalpick-up.When removing the flexible board from the connec