Kenwood-X92_4440_0x-cd-sm 维修电路原理图.pdf

2001-12 PRINTED IN JAPANB51-7867-00 (N)3417CD MECHANISM ASSYSERVICE MANUALX92-4030-0 xX92-4440-0 xDESCRIPTION MECHANISMX92-4030-00 (DXM-6000W)X92-4030-01 (DXM-6001W)X92-4030-02 (DXM-6002W)X92-4030-03 (DXM-6003W)X92-4030-04 (DXM-6004W)X92-4030-05 (DXM-6005W)X92-4440-00 (DXM-6100W)X92-4440-01 (DXM-6101W)X92-4440-02 (DXM-6102W)X92-4440-03 (DXM-6103W)X92-4440-04 (DXM-6104W)X92-4440-05 (DXM-6105W)outer-chassisdumper (X4)floating spring (X4)traverse chassis assy Mecha PCBroller springroller lever assydamper bracketdisc guide assyCONSTRUCTION OF MAJOR PARTSRadioFans.CN 收音机爱 好者资料库2X92-4030-0 xX92-4440-0 xNOTE FOR HANDLING MECHANISM ASSYTrigger LeverPick is under the finger, itmay touch.NGDont touch the lever be-cause the trigger levercomes off.NGDont have the center ofentrance because the discinsertion mouth is trans-formed.NGOKOKPICK UPSPINDLE MOTORSLIDER ASSYROLLEROKOKNG Dont touch in the frame, since grease isapplied to the parts. Dont applied grease to the roller. Dont touched PICK and SPINDLE MOTOR.RadioFans.CN 收音机爱 好者资料库X92-4030-0 xX92-4440-0 x3Mother BoardDOUT22X1/CLK19D.GND4DATA18Pick-Up/MSTOP10IC1IC2/MRST1152/MUTE L12/MUTE R13ABQ111IC6CDL-ch8VrefR-ch6RefQ3A+5VA.+8V9A.GNDA.GND7IC45VQ22VrefRegD.GND2MUTEDRVMUTEBu.+5V15Q472Q5LodingHD.GND142SledLLoe/Lim SW 1S.GND0-01Only8Eje SW1712Eje SW 21D.GNDLos SW20S7.5V3S.GND2Motor4Lo/Ej5RF AmpFo CoilServo Processor+MI-Com1Chip ICEFAPCTr CoilS18V SWSpindle MotorLoading & SledMotorMotor DriverVrefD2SW5V SWSWS3S4SW +5VS2Clock16.93MHzLPFBLOCK DIAGRAMCOMPONENTS DESCRIPTIONRef.No.Application/FunctionOperation/Condition/CompatibilityIC1CD-RW compatible RF amplifierGeneration of RF and servo error (focusing error, tracking error)signals based on the signals read from the APC circuit andpickup, detection of dropouts, anti-shock, track crossing and off-track signals, and gain switching for CD-RW.IC2CD signal processor LSI + Mechanism u-COMFocusing, tracking, sled and spindle servo processing, automatedprocessing (focusing, tracking, gain, offset and balance), digitalsignal processing (DSP, PLL, subcode, CIRC error correction andaudio data interpolation), Text function (MN662773kH2), and microcomputer function.IC44-CH BTL driverDrive of the focusing coil, tracking coil, sled motor and spindlemotor, plus loading and ejection operations.IC6Audio active filterSecondary LPFQ1For APC (Auto Power Control)LD drive.Q2Q3 SWON when P-ON = H (when SW +5 V is ON).Q3A.8V SWON when P-ON = H (when Q2 is ON).Q4D.5V SWON when P-ON = H (when Q5 is ON).Q5Q4 SW(P-ON)ON when P-ON = H.D1Pickup laser diode protectionD2D/A converter power supply diodeA.8V A.5VD3For static protectionD4For forced gain boost (tracking servo)GCD PLAYER UNIT (X32-5170-0 x/X32-5190-0 x)*P-ON: Pin 82 of IC2.X92-4030-0 xX92-4440-0 x4MICROCOMPUTERS TERMINAL DESCRIPTIONGMechanism Microcomputer (IC2 : X32-5170-0 x, X32-5190-0 x)Pin No.Name.I/ODescriptionProcessing Operation1BDOIDropout signal input. H: Detected.Photodetector signal input 1.2OFTIOff-track signal input. H: Detected.Photodetector signal input 2.3/RFDETIRF detection signal input. H: Detected.Photodetector signal input 3.4VDETIVibration detection signal input. H: Detected.Photodetector signal input 4.5LDONOLaser diode ON signal output. H: ON.Photodetector RF signal add input.6NC-No connection.RF amp filter terminal 1.7NC-No connection.RF amp filter terminal 2.8AVSS3IAnalog circuit GND.9AVDD3IAnalog circuit power supply.10FBALOFocusing balance adjustment output.Laser diode monitor input.11TBALOTracking balance adjustment output.Laser diode drive output.12FEIFocusing error signal input (D/A input).13NC-No connection.Tracking filter terminal 1.14NC-No connection.Tracking filter terminal 1.15TEITracking error signal input (analog input).16NC-No connection.Track cross comparator filter terminal.17NC-No connection.18NC-No connection.RF signal input (for RF detection).19RFENVIRF envelope signal input.20VREFIVREF input.21ARFIRF signal input (for DSL).22DRFIDSL bias terminal.23DSLFI/ODSL loop filter terminal.24IREFIReference current input.25PLLFI/OPLL loop filter terminal.26PLLF2I/OPLL loop filter characteristic switching terminal.27VCOFI/OVCO loop filter terminal.28VCOF2I/ODigital servo 33.8688 MHz generation (VCO loop filter terminal).29TRVOTraverse forced feed output.30TVDOTraverse drive output.31PCOSpindle motor ON output. L: ON.32ECMOSpindle motor drive output (forced mode output) (D/A output).33ECSOSpindle motor drive output (servo error signal output).34KICKOKick pulse output.35TRDOTracking drive output.36FODOFocusing drive output.37TOFSOTracking offset adjustment output.38AVDD2IAnalog circuit power supply (for DSL, PLL, AD and DA circuits).39AVSS2IAnalog circuit GND.40DVSS2IDigital circuit GND.41EFM or CK384OEFM signal output.When command is executed:16.9344 MHz clock output.42PCK or DSLBOPLL sampling clock output.When command is executed:DSL balance output.43/CLDCKOSubcode frame clock signal output.44FCLKOXtal frame clock signal output.45IPFLAGOInterpolation flag signal output. H: Interpolated.46FLAGOFlag signal output.47TRCRSITrack crossing signal input.Track crossing signal output.48STOUTOSerial data output for monitor signal (OFT, VDET, BDO, RFDET, etc.)49STLDOLoad signal output for monitor signal.50SMCKOBit clock signal output for monitor signal.5X92-4030-0 xX92-4440-0 xMICROCOMPUTERS TERMINAL DESCRIPTIONPin No.Name.I/ODescriptionProcessing Operation51CSELIXtal oscillation frequency selection terminal, which is fixed at L.H: 33.8688 MHz. L: 16.9344 MHz.52TEST1ITest pin 1. Fixed at L (normal position).53TEST2ITest pin 2. Fixed at L (normal position).54IOSELIAudio DAC external data input mode selection terminal.55/NRSTIReset input. L: Reset.56BCLKOSRDATA bit clock output.57LRCKOL/R identification signal output.58SRDATAOSerial data output.59SUBCOSubcode serial output.60SBCKISubcode serial output clock input.61DQSYOCD-TEXT read permission signal output.62DEMPHODe-emphasis detection signal output. H: ON.63TXODigital audio interface signal output.64SRDATAINISRDATA input/test terminal.65LRCKINILRCK input/SMCK output frequency switching.66BCLKINIBCLK input. When not used: VDD.67DVDD1IDigital circuit power supply.68X1IXtal oscillator input terminal.69X2OXtal oscillator output terminal.70DVSS1IDigital circuit GND.71XSUB1IMicrocomputer clock input terminal.72XSUB2OMicrocomputer clock output terminal.73DVDD2IDigital circuit power supply.74NCONo connection.75NCONo connection.7673/74SELI73/74 selection port.77DRV_MUTEODriver muting control terminal.78NCONo connection.79NCONo connection.80TESTITest mode switching terminal.81ASELIAudio output polarity detection terminal.82PONOAudio/digital power supply control terminal.83SEARCHOServo IC gain switching control terminal.84EQCNTORF amp double-speed switching control terminal.85SW3ILimit switch detection terminal.86/MUTE_LOL-CH analog muting control terminal.87/MUTE_ROR-CH analog muting control terminal.88CD_RWOCD-RW control terminal.89/RSTISystem reset input terminal.90MECHASELI6000/6010 selection port.L=6000 H=601091/MSTOPIStandby detection terminal.92LDCNTOLD control terminal.93DATAI/OI2C bus data line (communication line with System controller).94/CLKI/OI2C bus clock data line (communication line with System controller).95HOTITemperature protection detection terminal.96VREF+IA/D converter + power supply.97OUTROR-channel audio output.98AVDD1IAnalog circuit power supply (for audio output circuits ofboth L and R channels).99OUTLOL-channel audio output.100AVSS1IAnalog circuit GND (for audio output circuits of both Land R channels).X92-4030-0 xX92-4440-0 x6Centerof rotationProjectionDisc 8cm DiscTrigger armADiscTrigger armPosition pushed by the discSwitch ON!Disc arm(L)Disc arm(R)DiscClaw (A)OPERATION DESCRIPTION1 Disc Loading(1) Turning the loading switch ON1) When a disc is inserted, the disc arms open to the left andright and the claw below disc arm (L) sets the loadingswitch ON.2) The above starts the motor rotation.(2) Loading the disc1) When the motor starts rotation, the worm gear also startsto turn as shown in the figure.2) The rotation force is transmitted to the gear train.3) When the force is transmitted to the final gear, the rollersrotate to pull in the disc.The disc is pulled in or out when the rollers are pushedagainst the disc guide.2 Operation of Slider (R)(1) Activating the trigger arm1) When the disc is pulled in by the rollers, the disc edgepushes the trigger arm and rotates it.2) When the disc is an 8cm disc, it is pulled upwards by thetapering on the disc guide. The trigger arm is rotatedwhen the disc pushes the claw (section A) located beforethe trigger arm.When the 8cm disc reaches the loading end position, theroller areas supporting the disc decreases. To prevent thedisc from dropping in this case, the claw is provided with aprojection for supporting the disc.Worm gearMotorRubber rollersDisc INSide viewDisc guideRollerDisc INDisc OUTDisClamper chassisX92-4030-0 xX92-4440-0 x7(2) Basic construction (Initial position ofthe planetary gear mechanism)1) Even after the disc has been inserted,the motor rotated and the gear train alsorotated, slider (R) does not startoperation yet.This is because theplanetary gear mechanism is used andthe carrier gear is locked by the slidermechanism. In this period, the planetarygear is in the loose condition.2) When the sun gear is rotating and thecarrier gear is locked, the planetary gearis running idle.(3) Basic construction (Construction ofthe trigger slider and slider (R)The trigger slider is assembled with slider(R) and pushed in the direction of the arrowby the force of a spring.(4) Operation of slider (R)1) Activating the trigger sliderWhen the trigger arm is rotated by thepressure of the disc, the trigger armpushes the trigger slider.LockedLockedSun gearCarrier gearCarrier gears ribSlider (R)Trigger sliderSpringSlider (R)Centerof rotationTrigger sliderTrigger sliderTrigger armDiscTrigger armGear teethon the traversechassis2) Rotating (engaging) the planetary gearWhen the trigger slider is moved, it pushes down thewall (section A) of the carrier gear. (Initial rotation of thecarrier gear)This causes the planetary gear, which is attached on apin of the carrier gear, to move according to the rotationof the carrier gear. When the planetary gear is meshedwith a gear tooth (section B) of the traverse chassis, theplanetary gear starts rotation.The rotation of the planetary gears causes the carriergear to rotate.Planetary gearLooseP l a n e t a r yLooseCarrier gearX92-4030-0 xX92-4440-0 x83) Activating slider (R)When the carrier gear rotates, its wall (section C) pushesand moves the trigger slider.When the trigger slider is moved, slider (R) is pulled bythe force of spring (section D).Slider (R)(1) Functions activated by slider (R)1) Operation modesTo play back a CD, it is required to perform a flow of operations as shown below. Pulling the disc in and stopping the roller rotations after it. Moving the clamper downwards so that it can clamp thedisc during playback. (Disc chucking) Moving the rollers that are in contact with the disc.(Lowering the roller lever)2) Coupling conditionsThe parts used for performing the above functions arecoupled with slider (R) as shown below. Float (suspend) the mechanism in order to protect itfrom vehicle vibrations during disc playback. Moving the pickup (optical assy) so that it can reads thedisc signals.These series of operations are activated by the movement ofslider (R).Clamper chassis assySlider (R) assyRoller lever assyRoller armDiscSlider (R)3 Flow Until Disc Chucking (Playback Standby Condition)Right sideWhen the trigger slider moves along the longitudinalgrooves on slider (R) till the ends of grooves, the triggerslider itself begins to push and move slider (R).Start pointEnds of longitudinalgroovesSectionspushing slider (R)X92-4030-0 xX92-4440-0 x9When slider (R) moves, the boss of the roller arm movesalong the groove of slider (R), thereby separating thehelical gear 2 coupled with it from load gear 2.3) Rotation of rollers during disc loadingAs shown in the following figure, themotor rotation force is transmittedthrough sun gear helical gear 2 load gear 2 to the gear that is coupleddirectly with the roller shaft to rotate therollers and pull in the disc.(2) How to stop the roller rotationThe boss of the roller arm is engaged witha groove on slider (R).BossGrooveGrooveRollerRotation direction for pulling the disc inDiscSun gearForce transmitted from themotorLoad gear 2Helical gear 2Roller armSlider (R) assyRoller armHelical gear 2Roller armGear shaftSlider (R)GrooveClamper assyPlate spring(3) Operation of the clamper (Disc chucking)1) Engaged conditionThe plate spring attached to the clamper chassis isoriginally engaged with a groove on slider (R).This stops transmission of the force to the rollers so therollers stop.StoppedSlider (R)Load gear 2Helical gear 2X92-4030-0 xX92-4440-0 x10Centerof rotationSlider (R)ClamperPlate springClamperchassis assyEngaged condition2) Lowering the clamper (for disc chucking)As slider (R) moves, the plate springsection engaged with it moves along itsgroove and lowers the clamper chassisassembly.The following figure shows the flow ofoperation.2) Lowering the rollers (Disc playbackposition)As slider (R) moves, the roller lever shaftengaged with a groove on slider (R)moves along the groove and lowers therollers.The following figure shows the flow ofoperation.Center of rotationShaftFinal positionRoller leverRollerDiscSliderIn contrast to the downward movement of the rollers, the extremity of the roller lever starts to be raised.2-disc insertionpreventionRollers are separated from the disc.Engaged condition(4) How to lower the rollers1) Disc chucking completion positionWhen the disc in this position, the rollers are located belowthe disc and in contact with it.To rotate the disc for playback, it is required to separatethe rollers from the disc.Disc chucking completion positionThe roller lever extremity comes in the position shown in the figure. Here, it plays a role of stopper for preventing insertion of more than one disc.At the lowest position of the rollersInitial positionX92-4030-0 xX92-4440-0 x11(5) Floating position and lock position of the mechanismThe disc is loaded and ejected by rotation of the rollers thatcome in close contact with the disc.After the disc has been pulled in by the rollers, its positionshould be adjusted so that it can be placed precisely on theturntable of the traverse chassis. To make this possible, thetraverse chassis and outer chassis should be in the lockedcondition.Since the outer chassis is originally locked on the main unit,if the traverse chassis is also locked during playback, thedisc would be subjected directly to vibrations of vehicleduring driving and the disc signal would be hindered, makingthe audio intermittent or impossible to be played.To prevent such a problem, the traverse chassis issuspended from the outer case using springs or rubberdampers during driving. This positioning p