Kenwood-X-92-4460-00-Service-Manual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 ASSYX92-4460-0xSERVICE MANUAL2NOTE 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.NGOK OKPICK UPSPINDLE MOTORSLIDER ASSYROLLEROK OK NG Dont touch in the frame, since grease isapplied to the parts. Dont applied grease to the roller. Dont touched PICK and SPINDLE MOTOR.X92-4460-0x3EFACBDTR 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-UP BOARDMOTHER7VREF3024PONPONLchRchA. GNDA. +8VD. GNDBU. +5VD5VLOE/LIM SW8EJE SW12EJE SWLOS SWS7.5VLO/EJMOTORS. GND22422D MUTEBLOCK DIAGRAMCOMPONENTS DESCRIPTIONX92-4460-0xa71CD PLAYER UNIT(X32-5210-0x)Ref.No. Component Name Application/Function Operation/Condition/CompatibilityIC2 L88MS33T D3.3V AVR Power supply for the pickup, IC5, IC10 and IC11IC4 BA5824FP 4CH BTL driverFocusing coil, tracking coil, spindle motorand sled motor driver, disc loading and ejectoperation.IC5 703033AYGC-J01 Mecha. control MI-COM.IC6 TAR5S33 A3.3V AVRPower supply for DAC, LPF operationalreference voltageIC7 TC74HCT7007AF Level shifting(3.3V 5V) Buffer and logic level conversion from IC10 to IC5IC10 UPD63760GJ RF amplifier+CD DSP+MP3 decoderIC11 4M bit DRAM For data bufferIC12 NJM4580M1 Low pass filter 2nd low pass filter for audio signalsQ1 DTA143EUA D.5V SWWhen PON(11pin) goes Lo, Q1 is turned on,and SW5V is supplied to IC7 andAVREF(73PIN).Q2 MCH6101 APC LD power controlQ3 DTC124EUA D3.3V SWWhen PON(10pin) goes Hi, Q3 is turned on,and IC2 is working.Q4 DTA143XUAA.8V SWWhen PON(10pin) goes Hi, Q4 and Q5 areturned on, and A.8V is supplied to IC6 andIC12.Q5 DTC124EUAIS41LV16257or MSM51V4265EP704MICROCOMPUTER'S TERMINAL DESCRIPTIONa71IC2 (CD PLAYER UNIT : X32-5210-0x)Pin No. Name. I/O Description Processing Operation1-5 NC O Not used(N.C.)6 EVDD - Positive power supply connection terminal Connected to BU 5V lines.7 EVSS - Ground connection terminal Connected to GND lines.8,9 NC O Not used(N.C.)10 PON O Power ON/OFF control terminal Lo : Power OFF, Hi : Power ON11 PON O Power ON/OFF control terminal Lo : Power ON, Hi : Power OFF12 LOE/LIM SW I Down limit SW detection terminal HiLo : Pickup most inner position detected13 8EJE SW I 8cm disc detection SW input Not used(connected to GND lines)14 LOS SW I Loading start detection SW input Not used(connected to GND lines)15 12EJE SW I 12cm disc detection SW input Not used(connected to GND lines)16,17 NC O Not used(N.C.)18 VPP - FLUSH write terminal Not used(connected to GND lines)19 MUTE L O Lch. Audio muting control outputLo : Muting ON requested,Hi : Muting OFF requested20 MUTE R O Rch. Audio muting control outputLo : Muting ON requested,Hi : Muting OFF requested21-25 NC O Not used(N.C.)26 EFLG I WMA error detection input (Lo: No ERROR) Not used(pull down to GND lines)27 WAIT I Wait control signal detection input28 FOK I Focusing condition detection input Lo : Focusing NG, Hi : Focusing OK29,30 NC O Not used(N.C.)31 RESET I Reset terminal Lo : Reset, Hi : Normal operation32 XT1 I Sub clock resonator connection terminal Not used(pull down to GND lines)33 XT2 - Sub clock resonator connection terminal Not used(N.C.)34 REGC - Capacitor connection terminal for regulator inside microprocessor35 X2 - Main clock resonator connection terminal36 X1 I Main clock resonator connection terminal37 VSS - Ground connection terminal Connected to GND lines.38 VDD - Positive power supply connection terminal Connected to BU 5V lines.39 NC O Not used(N.C.)40 WRL O Multiplex WRITE signal output Lo : Write41 NC O Not used(N.C.)42 R/W O Multiplex R/W signal output Not used(N.C.)43 DSTB,RD O Multiplex RD siganal output Lo : Read44 ASTB O Multiplex ASTB siganal output45,46 NC O Not used(N.C.)47 AD0 I/O Multiplex Address/Data Bus48 AD1 I/O Multiplex Address/Data Bus49 AD2 I/O Multiplex Address/Data Bus50 AD3 I/O Multiplex Address/Data Bus51 AD4 I/O Multiplex Address/Data Bus52 AD5 I/O Multiplex Address/Data Bus53 AD6 I/O Multiplex Address/Data Bus54 AD7 I/O Multiplex Address/Data Bus55 BVDD - Bus interface positive power supply connection terminal Connected to D3.3V lines.X92-4460-0x5MICROCOMPUTER'S TERMINAL DESCRIPTIONX92-4460-0xPin No. Name. I/O Description Processing Operation56 BVSS - Bus interface ground connection terminal Connected to GND lines.57 AD8 I/O Multiplex Address/Data Bus58 AD9 I/O Multiplex Address/Data Bus59 AD10 I/O Multiplex Address/Data Bus60 AD11 I/O Multiplex Address/Data Bus61 AD12 I/O Multiplex Address/Data Bus62 AD13 I/O Multiplex Address/Data Bus63 AD14 I/O Multiplex Address/Data Bus64 AD15 I/O Multiplex Address/Data Bus65 HCSB O Chip select control output Not used(N.C.)66 CS O Chip select control output Lo : ON, Hi : OFF67 DSP RESET O DSP reset control output Lo : Reset, Hi : Normal operation68 REQ I Data transfer request input Not used(pull down to GND lines)69 DBBWRDY0 I DBB00 register write permission input Not used(pull down to GND lines)70 DBBRRDY0 I DBB00 register read permission input Not used(pull down to GND lines)71 AVDD - A/D converter positive power supply connection terminal Connected to BU 5V lines.72 AVSS - A/D converter ground connection terminal Connected to GND lines.73 AVREF I A/D converter reference voltage input terminal Connected to D5V lines.74-77 NC I Not used(connected to GND lines)78 HOT I Temperature change detection input Not used(pull down to GND lines)79 M-CONT I Not used(connected to GND lines)80 WMA I WMA adaptation selection inputLo : WMA not adapted,Hi : WMA adapted81 NC I Not used(connected to GND lines)82 ASEL I Audio output polarity selection inputLo : Non-inverted output,Hi : Inverted output83 DASC I Shock proof method selection inputLo : Shock proof OFF,Hi : Shock proof ON84 TEST2 I test terminal 2 Not used(pull down to GND lines)85 TEST3 I test terminal 3 Not used(pull down to GND lines)86 NC O Not used(N.C.)87 MSTOP I MECHA. Stop interrupt input Lo : Stop, Hi : Normal operation88 INTSV I Interrupt input from servo IC Hi : Interrupt89 FOGUP I Focusing gain up interrupt inputLo : Normal operation,Hi : Focusing gain up90 ZMUTE R I Rch. 0 bit muting detection input Lo : Muting OFF, Hi : Muting ON91 ZMUTE L I Lch. 0 bit muting detection input Lo : Muting OFF, Hi : Muting ON92 NC O Not used(N.C.)93 D-MUTE O Driver muting outputLo : Spindle motor, focusingactuator and tracking actuatoroutputs OFF94 SYS SDA I/O I2C bus data line (communication line with System microprocessor)95 NC O Not used(N.C.)96 SYS SCL I/O I2C bus clock line (communication line with System microprocessor)97-100 NC O Not 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 gear MotorRubber rollersDisc INSide viewDisc guideRollerDisc INDisc OUTDisClamper chassisX92-4460-0x7(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 gear's 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 gearLoosePlanetaryLooseCarrier gearX92-4460-0x83) 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 ass'y) 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)X92-4460-0x9When 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 2X92-4460-0x10Centerof 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 positionX92-4460-0x
