Kenwood-X92_4460_0x-cd-sm 维修电路原理图.pdf

2002-1 PRINTED IN JAPANB51-7891-00 (N) 3415DESCRIPTION MECHANISMX92-4460-00 (DXM-6400W)X92-4460-01 (DXM-6401W)X92-4460-02 (DXM-6402W)X92-4460-03 (DXM-6403W)outer-chassisdumper (X4)floating spring (X4)traverse chassis assy Mecha PCBroller springroller lever assydamper bracketdisc guide assyCONSTRUCTION OF MAJOR PARTSCD MECHANISM ASSYX92-4460-0 xSERVICE MANUALRadioFans.CN 收音机爱 好者资料库2NOTE 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.X92-4460-0 xRadioFans.CN 收音机爱 好者资料库3EFACBDTR COILFO COILAPC1 CHIP ICSERVOMP3 DECODERRF AMPIC10Q216.93MHzCLOCKX2D. GNDDRIVERMOTORIC4PROCESSORSPINDLEMOTORSLED MOTORLOADING &S. GNDLPFIC12IC11DRAMD. GNDIC5MI-COMIC6A3.3 REG8V SWQ4Q5SWQ1SWQ3SWIC2D3.3V REGD. GNDA. GNDD. GNDS3S4S1S2D. GND(0-01)ONLYA. GNDA. GNDPICK-UPBOARDMOTHER7VREF3024PONPONLchRchA. GNDA. +8VD. GNDBU. +5VD5VLOE/LIM SW8EJE SW12EJE SWLOS SWS7.5VLO/EJMOTORS. GND22422D MUTEBLOCK DIAGRAMCOMPONENTS DESCRIPTIONX92-4460-0 xGCD PLAYER UNIT(X32-5210-0 x)Ref.No.Component NameApplication/FunctionOperation/Condition/CompatibilityIC2L88MS33TD3.3V AVRPower supply for the pickup, IC5, IC10 and IC11IC4BA5824FP4CH BTL driverFocusing coil, tracking coil, spindle motorand sled motor driver, disc loading and ejectoperation.IC5703033AYGC-J01Mecha. control MI-COM.IC6TAR5S33A3.3V AVRPower supply for DAC, LPF operationalreference voltageIC7TC74HCT7007AFLevel shifting(3.3V 5V)Buffer and logic level conversion from IC10 to IC5IC10UPD63760GJRF amplifier+CD DSP+MP3 decoderIC114M bit DRAMFor data bufferIC12NJM4580M1Low pass filter2nd low pass filter for audio signalsQ1DTA143EUAD.5V SWWhen PON(11pin) goes Lo, Q1 is turned on,and SW5V is supplied to IC7 andAVREF(73PIN).Q2MCH6101APCLD power controlQ3DTC124EUAD3.3V SWWhen PON(10pin) goes Hi, Q3 is turned on,and IC2 is working.Q4DTA143XUAA.8V SWWhen PON(10pin) goes Hi, Q4 and Q5 areturned on, and A.8V is supplied to IC6 andIC12.Q5DTC124EUAIS41LV16257or MSM51V4265EP704MICROCOMPUTERS TERMINAL DESCRIPTIONGIC2 (CD PLAYER UNIT : X32-5210-0 x)Pin No.Name.I/ODescriptionProcessing Operation1-5NCONot used(N.C.)6EVDD-Positive power supply connection terminalConnected to BU 5V lines.7EVSS-Ground connection terminalConnected to GND lines.8,9NCONot used(N.C.)10PONOPower ON/OFF control terminalLo : Power OFF, Hi : Power ON11PONOPower ON/OFF control terminalLo : Power ON, Hi : Power OFF12LOE/LIM SWIDown limit SW detection terminalHiLo : Pickup most inner position detected138EJE SWI8cm disc detection SW inputNot used(connected to GND lines)14LOS SWILoading start detection SW inputNot used(connected to GND lines)1512EJE SWI12cm disc detection SW inputNot used(connected to GND lines)16,17NCONot used(N.C.)18VPP-FLUSH write terminalNot used(connected to GND lines)19MUTE LOLch. Audio muting control outputLo : Muting ON requested,Hi : Muting OFF requested20MUTE RORch. Audio muting control outputLo : Muting ON requested,Hi : Muting OFF requested21-25NCONot used(N.C.)26EFLGIWMA error detection input (Lo: No ERROR)Not used(pull down to GND lines)27WAITIWait control signal detection input28FOKIFocusing condition detection inputLo : Focusing NG, Hi : Focusing OK29,30NCONot used(N.C.)31RESETIReset terminalLo : Reset, Hi : Normal operation32XT1ISub clock resonator connection terminalNot used(pull down to GND lines)33XT2-Sub clock resonator connection terminalNot used(N.C.)34REGC-Capacitor connection terminal for regulator inside microprocessor35X2-Main clock resonator connection terminal36X1IMain clock resonator connection terminal37VSS-Ground connection terminalConnected to GND lines.38VDD-Positive power supply connection terminalConnected to BU 5V lines.39NCONot used(N.C.)40WRLOMultiplex WRITE signal outputLo : Write41NCONot used(N.C.)42R/WOMultiplex R/W signal outputNot used(N.C.)43DSTB,RDOMultiplex RD siganal outputLo : Read44ASTBOMultiplex ASTB siganal output45,46NCONot used(N.C.)47AD0I/OMultiplex Address/Data Bus48AD1I/OMultiplex Address/Data Bus49AD2I/OMultiplex Address/Data Bus50AD3I/OMultiplex Address/Data Bus51AD4I/OMultiplex Address/Data Bus52AD5I/OMultiplex Address/Data Bus53AD6I/OMultiplex Address/Data Bus54AD7I/OMultiplex Address/Data Bus55BVDD-Bus interface positive power supply connection terminalConnected to D3.3V lines.X92-4460-0 x5MICROCOMPUTERS TERMINAL DESCRIPTIONX92-4460-0 xPin No.Name.I/ODescriptionProcessing Operation56BVSS-Bus interface ground connection terminalConnected to GND lines.57AD8I/OMultiplex Address/Data Bus58AD9I/OMultiplex Address/Data Bus59AD10I/OMultiplex Address/Data Bus60AD11I/OMultiplex Address/Data Bus61AD12I/OMultiplex Address/Data Bus62AD13I/OMultiplex Address/Data Bus63AD14I/OMultiplex Address/Data Bus64AD15I/OMultiplex Address/Data Bus65HCSBOChip select control outputNot used(N.C.)66CSOChip select control outputLo : ON, Hi : OFF67DSP RESETODSP reset control outputLo : Reset, Hi : Normal operation68REQIData transfer request inputNot used(pull down to GND lines)69DBBWRDY0IDBB00 register write permission inputNot used(pull down to GND lines)70DBBRRDY0IDBB00 register read permission inputNot used(pull down to GND lines)71AVDD-A/D converter positive power supply connection terminalConnected to BU 5V lines.72AVSS-A/D converter ground connection terminalConnected to GND lines.73AVREFIA/D converter reference voltage input terminalConnected to D5V lines.74-77NCINot used(connected to GND lines)78HOTITemperature change detection inputNot used(pull down to GND lines)79M-CONTINot used(connected to GND lines)80WMAIWMA adaptation selection inputLo : WMA not adapted,Hi : WMA adapted81NCINot used(connected to GND lines)82ASELIAudio output polarity selection inputLo : Non-inverted output,Hi : Inverted output83DASCIShock proof method selection inputLo : Shock proof OFF,Hi : Shock proof ON84TEST2Itest terminal 2Not used(pull down to GND lines)85TEST3Itest terminal 3Not used(pull down to GND lines)86NCONot used(N.C.)87MSTOPIMECHA. Stop interrupt inputLo : Stop, Hi : Normal operation88INTSVIInterrupt input from servo ICHi : Interrupt89FOGUPIFocusing gain up interrupt inputLo : Normal operation,Hi : Focusing gain up90ZMUTE RIRch. 0 bit muting detection inputLo : Muting OFF, Hi : Muting ON91ZMUTE LILch. 0 bit muting detection inputLo : Muting OFF, Hi : Muting ON92NCONot used(N.C.)93D-MUTEODriver muting outputLo : Spindle motor, focusingactuator and tracking actuatoroutputs OFF94SYS SDAI/OI2C bus data line (communication line with System microprocessor)95NCONot used(N.C.)96SYS SCLI/OI2C bus clock line (communication line with System microprocessor)97-100 NCONot used(N.C.)6Centerof 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 chassisX92-4460-0 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 gearX92-4460-0 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)X92-4460-0 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 2X92-4460-0 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 positionX92-4460-0 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 protects the discplayback operations and is referred to as the floatingposition.(6) Function of slider (L)Slider (L) ensures the mechanism lock position because theshafts of the outer chassis are inserted into its grooves inthe same way as they are inserted into the grooves on slider(R).As slider (R) moves, the force moving the roller lever istransmitted to slider (L), which also starts the slidingmovement.When the spring is compressed gradually to a certain point,the force changes to a reverse force, which supports thejump-up operation of the roller lever.Shafts for locking the traverse chassis (Outer case-integrated design)(4 shafts)Outer-chassisMechanism lock positionMechanism floating positionOuter-chassisOuter-chassisThe shafts of the outer chassis are inserted into t