Kenwood-LDK-300-V-Service-Manual电路原理图.pdf
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1、VIDEO-CD LD PLAYERLD-K300VSERVICE MANUAL1997-8/B51-5333-00 (K) 23370AUTOPAUSEOPENDIGITALMONITOR674CRCRECHO LEVELKARAOKEKEY CONTROLIiPOWER-ONOFFMIC2MIC1MIC LEVEL21MICMIC CONTROLON/STANDBYVIDEO CD LD PLAYER LD-K300VAUTO AUDIO PREVIOUSNEXTAC- 3 OUTRFDIGITAL VIDEODIGITAL VIDEOCOMPACTCOMPACTVIDEO CDVIDEO
2、OUTPUTAUDIOOUTPUTDolby AC - 3RF OUTSYSTEMCONTROL2/R1/LIndicator(B12-0316-04)Dressing panel(A21-1966-03)Panel(A19-0865-01)Escutcheon(B07-2359-12)Phono jack(E63-0130-05)Phono jack(E63- 0116-05)Miniature phone jack(E11-0188-05)AC power cord(E30-2717-05)Metallic cabinet(A01-3440-01)Phono jack(E11-0366-0
3、5)Miniature phone jack(E11-0200-05)Knob(K29-6688-02)Front glass(B10-2361-13)Knob(K29-6687-03)Knob(K27-2233-04)Panel(A60-1155-11)Knob(K29-6689-02)Foot(J02-1188-03)Foot(J02-1188-03)Phono jack(E63-0122-05)Power cord busing(J42-0083-05)Refer to LVD-290 service manual (B51-5233-00), if yourequire the sem
4、iconductor description (X32, IC9 9 MPEGu-COM) and disassembly for repair in detail.Attention !To avoid firing or other accident, the repair (in cloudingreplacement of fuse) of the switching power supplyP.C.B. (W02-2568-35) is prohibited.In case of the repair (defective P.C.B.), please replacethe com
5、plete P.C.B. with new one.LD-K300V(K) COVER( 98.4.23 8:58 PM yW2LD-K300V2CONTENTS / ACCESSORIES / CAUTIONSBeware of condensationWhen water vapor comes into contact with the surface of coldmaterial, water drops are produced. If condensation occurs, correctoperation may not be possible, or the unit ma
6、y not function correct-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 for sev-eral hours.)Be especially careful in the following conditions:lWhen the unit is brought from a cold place to a warm place,and there is a large
7、temperature difference.lWhen a heater starts operating.lWhen the unit is brought from an air-conditioned place to aplace of high temperature with high humidity.lWhen there is a large difference between the internal tempera-ture of the unit and the ambient temperature, or in conditionswhere condensat
8、ion occurs easily.NO DISCContentsVideo cord (1)(E30-1427-05)System control cord (1)(E30-2733-05)Audio cord (2)(E30-0505-05)AC plug adaptor (1)(E03-0115-05)Use to adapt the power cord tothe shape of the wall outlet.(Accessory only for regionswhere use is necessary.)CONTENTS / ACCESSORIES / CAUTIONS.2
9、ADJUSTMENT.3PC BOARD.5SCHEMATIC DIAGRAM.9EXPLODED VIEW.26PARTS LIST.28PARTS DESCRIPTIONS.37SPECIFICATIONS.Back coverCautionsNote related to transportation and movementBefore transporting or moving this unit, carry out the followingoperations.1. Turn the power ON but do not load a disc.2. Verify that
10、 the display shown appears.3. Wait a few seconds and turn the power OFF.AccessoriesLD-K300V(K) COVER( 98.4.23 8:58 PM yW33ADJUSTMENTLD-K300VMAIN UNIT(X34-1033)Note :L.P.F. : 33k+1000pF or so, CD disc : CD test disc (SONY YEDS-18 or equivalent), LD disc : CAV30cm(with digital sound), STILL : Remote c
11、ontrollers key.fig. : Waveform (P.12)No.ITEMINPUTSETTINGOUTPUTSETTINGPLAYERSETTINGALIGNMENTPOINTALIGNFORFIG.1TILTBALANCELD TEST DISCConnect theTV monitor to thevideo output.Frame No.19,001STILL (Still image) *Frame No.23,402STILL (still image)VR3Minimize thecrosstalk on thescreen.Connect anoscillosc
12、ope to RF :CN3 pin 6 (EFM).Frame No.20,000STILL (still image)Eye-pattern ismaximum and clear.(a)2FOCUS BALANCETEST DISCConnect anoscilloscope to RF :CN3 pin 6 (EFM).PLAYVR2Maximize the RF signal (eye pattern)amplitude.(a)3TRACKING BALANCETEST DISCConnect an oscilloscope to TE : CN3 pin 1.TE OFFVR1Sy
13、mmetry betweenupper and lower.(b)4FOCUSGAINTEST DISCApply a signal(1.0kHz/0.2Vp-p) toCN3 pins 4 and 5 .Connect an L.P.F.toCN3 pins 4 and 5, towhich connect anoscilloscope or twoAC voltmeters.PLAYVR4Two VTVMs shouldread the same level.5TRACKINGGAINTEST DISCApply a signal(1.3kHz/0.2Vp-p) toCN3 pins 1
14、and 2.Connect an L.P.F.toCN3 pins 1 and 2, towhich connect anoscilloscope or twoAC voltmeters.PLAYVR5Two VTVMs shouldread the same level.6VIDEOLEVELLD TEST DISCTerminate the videooutput with a 75resistor and connectan oscilloscope toboth ends.Frame No.100STILL(still image)*Frame No.13,000STILL(still
15、 image)VR7Video signalamplitude to 1.0Vp-p74FscPOWER ON Connect afrequency counter tocheck land (14M) ofIC3 pin 7.STOPTC114.31818MHz50Hz8VIDEO CDCLOCKPOWER ONConnect afrequency counter tocheck land(13.5MHz) of IC2 pin 99(R16).STOPTC113.5MHz50HzSetting the TEST MODE (Short-circuiting the CN7 pin 1 an
16、d 2 in AC IN mode : TE OFF)VIDEO CD UNIT (X35-2170-20) Setting the power onLD-K300V(K) 1P 98.4.24 8:28 AM yW14ADJUSTMENTLD-K300VNo.ITEMINPUTSETTINGOUTPUTSETTINGPLAYERSETTINGALIGNMENT POINTALIGNFORFIG.TANGENTIALCD TEST DISCConnect anoscilloscope to CN3pin 6 (EFM). (MAINUNIT)PLAYTangential nut(Turn wi
17、thin 4clicks)Maximize the RFsignal (eye pattern)amplitude.(a)R-DEPENDENCECD TEST DISCConnect an L.P.F. toCN3 pins 7 and 8, toconnect anoscilloscope andselect X-Y mode.(MAIN UNIT)PLAYR-dep. nut (Lessthan 10)Adjust so that theLissajous waveformbecomes -45MECHANISM ADJUSTMENT PROCEDURERadial-Dependence
18、adjust (slide the pickup tomeet with the center ofthe pickup and that of theturntable.) Note :CD disc : CD test disc (SONY) YEDS-18 or equivalent), LD disc : CAV 30cm (with digital sound)Tangential adjust(Keep the dischorizontally for thepickup)GNDMain unit (X34)Oscillocope(a) TILT BALANCE / FOCUS B
19、ALANCE / TANGENTGNDMain unit (X34)Oscillocope(b) TRACKING BALANCECN3CN3CN7 CN7E = FLD-K300V(K) 1P 98.4.24 8:28 AM yW2ABDFHJCEGI2 1357 46Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD(Component side view)LD player unit (X34-1033-00)56LD-K300V(K) 2P PCB 98.4.24 8:37
20、AM yW1KMOQSLNPRT2 1357 46Refer to the schematic diagram for the value of resistors and capacitors. PC BOARD(Component side view)Display unit (X25-5983-00)Sub-circuit unit (X13-7400-20)Video unit (X35-2170-20)78LD-K300V(K) 2P PCB 98.4.24 8:42 AM yW2ABDFHJCEGI2 1357 46( )( )( )( )()() )( ()()()L2H1151
21、0( )( )( )( )() () ()()()(FE BAL( )() () ()(TILT BAL)(1u HEADBCFPD VCCPD VEERF(PD) OPICLDOBJECTIVELENS-+-+TRACKINGCOILFOCUSCOILTGKG RTNTGKG RTNTGKG RTNTGKG RTN91011121415161718202124 23 221 H 8 7 61K(B)5 3 2 14TILT LEDTILT PD INTILT PD OUTTILT SENSORT RTN F RTN F MO T MO VEE VCC RF RF GND E F19NC13N
22、C B C D A RF GND VRDLD PD OUTRF GND PD IN LEDTILTAPCPD123FG BIGNDFG OUTWH1WH1FG SENSORPH13 2 1S2SLT(LD)(CD)SLTS1654321WH2GND LD SWCD SW FG BI FG OUTGNDMOTOR SLIDERPH1: T95-0048-05SPINDLEMOTORSLDMOSLDRTNABMOTOR LOADINGC-+ -+ -+-VEEVEE+-+-+-+-CDLDLD/CD+-AGC- +- +VCCRF-AMP24232221201918GND1234567171615
23、1413891011120.1C232C234 0.033C236 0.47u50R356 10KC23847KR368330PC2410.06847KR362D15100u10C20768PC21610KR228C220 47PR226 15K0.47u50C208+15KR2551MR250100u10C211+82KR22912345678E FRF(EFM)FE1 FE2GNDTE2 TE1AD109VR5PDGNDLD8 7 6PD INPD OUTGND4 3 2LED113NCF14B C12 1115EVEE GND20 19RFVCC GND1718 1623FRTNTMO2
24、4FMOTRTN22 21u-COM G4FG OUT5CD SWLD SWFG BI3 2 1CN3CN124100u10C205+100R221 82KR222 33KR223 68KR225 68K R224 33K C212 68P23 2122R202+100R213100KR21222R218100u10C201+L1510u HQ29DIODEDRIVE LASERVR1 22KTE BALR357 1001260.022C500680R5072.2K R502180R519220PC511220R501Q51LD FEMRF AMPAPCPDCN2C206100u10+2.2K
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