Kenwood-X-92-4470-00-Service-Manual电路原理图.pdf

© 2002-1 PRINTED IN JAPANB51-7899-00 (N)3412CD MECHANISM ASSYX92-4470-0xSERVICE MANUALouter-chassisdumper (X4)floating spring (X4)traverse chassis assy Mecha PCBroller springroller lever assydamper bracketdisc guide assyDESCRIPTION MECHANISMX92-4470-00 (DXM-6500W)X92-4470-01 (DXM-6501W)X92-4470-02 (DXM-6502W)X92-4470-03 (DXM-6503W)CONSTRUCTION OF MAJOR PARTSX92-4470-0x2BLOCK DIAGRAMMother BoardIC10 IC12Pick-Up R-chL-ch7 IC6A.GNDA Q2C IC11Q49Q5 D.GNDVrefD.GNDIC5 Q1 D.GNDD.GNDSW5V/PONBu.+5VQ3 IC2X2 X3D.GND9 16 IC3IC4 16.93MHzS3Loe/Lim SWIC8S48Eje SWS212Eje SWS.GNDD.GNDS1D.GND Los SWS.GNDD4.7VD3.3VRegFo CoilTr CoilA.+8VLoading & SledMotorSpindle MotorSWPON2.5V RegMotor DriverSWSWMotorS7.5VLo/Ej0-01 OnlyA.GNDA.GNDA3.3 RegEAPCµ-ComDRAM 8V SW1Chip ICServo Processor+RF Amp+MP3 DecorderWMA DecorderLPFClock16.93MHzClock24.57MHzF30BDa71CD PLAYER UNIT (X32-5220-0x)Ref.No. Application/Function Operation/Condition/CompatibilityIC2 D3.3V AVR Power supply for the pickup, IC5, IC8-10 and IC11IC3 D2.5V AVR Power supply for IC8IC4 4CH BTL driverFocusing coil, tracking coil, spindle motor and sled motor driver, disc loading andeject operation.IC5 Mecha. control MI-COM.IC6 A3.3V AVR Power supply for DAC, LPF operational reference voltageIC7 Level shifting (3.3V5V) Buffer and logic level conversion from IC10 to IC5IC8 WMA decoderIC9 Clock buffer for WMAIC10 RF amplifier+CD DSP+MP3 decoderIC11 4M bit DRAM For data bufferIC12 Low pass filter 2nd low pass filter for audio signalsIC13 Schmitt trigger for WMAQ1 SW5V SWWhen PON (11pin) goes Lo, Q1 is turned on, and SW5V is supplied to IC7 andAVREF (73PIN).Q2 APC LD power controlQ3 D3.3V SW When PON (10pin) goes Hi, Q3 is turned on, and IC2 is working.Q4A.8V SWWhen PON (10pin) goes Hi, Q4 and Q5 are turned on, and A.8V is supplied to IC6Q5 and IC12.COMPONENTS DESCRIPTIONX92-4470-0x3MICROCOMPUTERS TERMINAL DESCRIPTIONprocessingPin Name I/O Purpose Processing operation description description inSTBY15 NC O Not use Low fixation Low6 VDD - 5V potential7 GND - GND potential8,9 NC O Not use Low fixation Low10 PON O Power ON/OFF control H : ON L : OFF Low11 /PON O Power ON/OFF control H : OFF L : ON High12 LOE/LIM_SW I Down limit SW detection L : inside circumference detection Hi-Z13 8EjE_SW I Not use Low fixation Hi-Z14 LOS_SW I Not use Low fixation Hi-Z15 12EjE_SW I Not use Low fixation Hi-Z16,17 NC O Not use Low fixation Low18 IC/Vpp - Writing voltage (FLUSH) -19 MUTE_L O Lch audio mute control L : mute ON H : mute OFF Low20 MUTE_R O Rch audio mute control L : mute ON H : mute OFF Low2125 NC O Not use Low fixation Low26 EFLG I WMA error detection H : error L : not error Out-Low27 WAIT I Weight control signal detection Out-Low28 FOK I Focus condition detection H : Focus OK L : Focus NG Out-Low29,30 NC O Not use Low fixation Low31 RESET I Reset detection H : normal L : reset Hi-Z32 XT1 I Not use Hi-Z33 XT2 - Not use -34 REGC -35 X2 -36 X1 I Hi-Z37 Vss - GND potential38 VDD - 5V potential39 NC O NC Output stop Low40 WRL O Multiplexer WRITE signal _LBEN : 61002 (not use) _WRL : 63760 Out-Low41 NC O Not use Low fixation Low42 R/W O Multiplexer _R/W signal _R/W : 61002 _WRH : 63760 (not use) Out-Low43 DSTB,RD O Multiplexer DSTB or RD signal _DSTB : 61002 _RD : 63760 Out-Low44 ASTB O Multiplexer ASTB signal Out-Low45,46 NC O Not use Low fixation Low4754 AD07 I/O Multiplexer address/data Out-Low55 BVdd - Power supply for bus inter face56 BVss - GND for bus inter face5764 AD815 I/O Multiplexer data/address Out-LowMECHANISM MICROCOMPUTER (IC5 : X32)X92-4470-0x4MICROCOMPUTERS TERMINAL DESCRIPTIONprocessingPin Name I/O Purpose Processing operation description description inSTBY65 /HCSB O Chip selection control H : OFF L : ON Low66 /CS O Chip selection control H : OFF L : ON Low67 DSP RESET O DSP reset control H : normal L : reset Low68 REQ I data transmit request input Hi-Z69 DBBWRDY0 I DBB00 register writing permit input Hi-Z70 DBBRRDY0 I DBB00 register reading permit input Hi-Z71 Avdd -72 Avss -73 Avref I A/D port standard voltage input7477 NC I Not use Low fixation Hi-Z78 HOT I temperature shift detectionDetection voltage 4V cancelHi-Zvoltage 3.9V79 M-CONT I Not use Low fixation Hi-Z80 WMA I WMA correspondence switchingH : DXM-6500 (correspond to WMA)Hi-ZL : DXM-6400 (Don't correspond to WMA)81 NC I Not use Hi-Z82 ASEL I Audio output polarity switchingH : turning-over outputHi-ZL : non- turning-over output83 DASC I Shock proof specification switching H : shock proof ON L : shock proof OFF Hi-Z84 TEST2 I Test terminal 2 Hi-Z85 TEST3 I Test terminal 3 Hi-Z86 NC O Not use Low fixation Low87 MSTOP I Standby return interrupt H : stop cancel L : stop Hi-Z (Low input)88 INTSV I Interrupt from servo IC H : interrupt Hi-Z89 FOGUP I Focus gain up interrupt H : Fo gain up L : normal Hi-Z90 ZMUTE_R I 0bit mute detection H : mute ON L : mute OFF Hi-Z91 ZMUTE_L I 0bit mute detection H : mute ON L : mute OFF Hi-Z92 NC O Not use Low fixation Low93 D-MUTE O Mute driver H : OFF L : ON Low94 SYS_SDA I/O system microcomputer 12C data Hi-Z95 NC O Not use Low fixation Low96 SYS_SCL I/O system microcomputer 12C clock Hi-Z97100 NC O Not use Low fixation LowX92-4470-0x5OPERATION 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 loading switchON.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 pushed againstthe disc guide.2 Operation of Slider (R)(1) Activating the trigger arm1) When the disc is pulled in by the rollers, the disc edge pushesthe 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 rotated whenthe disc pushes the claw (section A) located before the trig-ger arm.When the 8cm disc reaches the loading end position, the rollerareas supporting the disc decreases. To prevent the disc fromdropping in this case, the claw is provided with a projection forsupporting the disc.DiscSwitch ON!Disc arm(L) Disc arm(R)Centerof rotationRollerDisc guideDisc INDiscDisc OUTWorm gearMotorRubber rollersDisc INSide viewPosition pushed by the discTrigger armClamper chassisTrigger armADisc 8cm DiscClaw (A)ProjectionX92-4470-0x6OPERATION DESCRIPTION(2) Basic construction (Initial positionof the planetary gear mechanism)1) Even after the disc has been inserted, themotor rotated and the gear train also rotated,slider (R) does not start operation yet.Thisis because the planetary gear mechanismis used and the carrier gear is locked by theslider mechanism. In this period, the plan-etary gear is in the loose condition.2) When the sun gear is rotating and the car-rier gear is locked, the planetary gear is run-ning 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 arrow bythe force of a spring.(4) Operation of slider (R)1) Activating the trigger sliderWhen the trigger arm is rotated by the pres-sure of the disc, the trigger arm pushes thetrigger slider.LockedLockedCenterof rotation2) Rotating (engaging) the planetary gearWhen the trigger slider is moved, it pushes down the wall(section A) of the carrier gear. (Initial rotation of the carriergear)This causes the planetary gear, which is attached on a pinof the carrier gear, to move according to the rotation of thecarrier gear. When the planetary gear is meshed with a geartooth (section B) of the traverse chassis, the planetary gearstarts rotation.The rotation of the planetary gears causes the carrier gearto rotate.Sun gearCarriergearPlanetary gearSlider (R)Carrier gear's ribPlanetary gearLoose conditionLoose conditionTrigger sliderSlider (R)SpringTigger armTrigger sliderDiscTrigger sliderTrigger armGear teethon the traversechassisCarrier gearX92-4470-0xClamper chassis assyDiscRoller lever assyRoller armSlider (R) assyOPERATION DESCRIPTION73) 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 by theforce of spring (section D).When the trigger slider moves along the longitudinal grooveson slider (R) till the ends of grooves, the trigger slider itselfbegins to push and move slider (R).3Flow Until Disc Chucking (Playback StandbyCondition)(1) Functions activated by slider (R)1) Operation modesTo play back a CD, it is required to perform a flow of opera-tions as shown below.2)Coupling conditionsThe parts used for performing the above functions arecoupled with slider (R) as shown below. Pulling the disc in and stopping the roller rotations after it. Moving the clamper downwards so that it can clamp the discduring playback. (Disc chucking) Moving the rollers that are in contact with the disc.(Lowering the roller lever) Float (suspend) the mechanism in order to protect it fromvehicle 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).Start pointEnds of longitudinalgroovesSectionspushing slider (R)Right side viewSlider (R)Slider (R)X92-4470-0x8OPERATION DESCRIPTION3)Rotation of rollers during disc loadingAs shown in the following figure, themotor rotation force is transmittedthrough sun gear a160 helical gear 2 a160 loadgear 2 to the gear that is coupled directlywith the roller shaft to rotate the rollerand pull in the disc.(2) How to stop the roller rotationThe boss of the roller arm is engaged witha groove on slider (R).When 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.This stops transmission of the force to the rollersso the rollers stop.BossGrooveGrooveGroove(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).Force transmitted from themotorSun gearRollerRotation directionfor pulling thedisc inDiscLoad gear 2Helical gear 2Roller armSlider (R) assyRoller armHelical gear 2Gear shaftRoller armSlider (R)Clamper assyPlate springStoppedLoad gear 2 Helical gear 2Slider (R)X92-4470-0x9OPERATION DESCRIPTION2)Lowering the clamper (for disc chucking)As slider (R) moves, the plate spring sec-tion engaged with it moves along itsgroove and lowers the clamper chassisassembly.The following figure shows the flow ofoperation.(4) How to lower the rollers1)Disc chucking completion positionWhen the disc in this position, the rollers are locatedbelow the disc and in contact with it.To rotate the disc for playback, it is required to sepa-rate the rollers from the disc.2)Lowering the rollers (Disc playback po-sition)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.Centerof rotationCenter of rotationShaftFinal positionClamperSlider (R)Plate springClamperchassis assyEngaged conditionDisc chucking completion positionInitial positionRoller leverSliderEngaged conditionIn contrast to the downward movement of the rollers, the extremity of theroller lever starts to be raised.The roller lever extremity comes in the position shown in the figure. Here,itplays a role of stopper for preventing insertion of more than one disc.2-disc insertionpreventionRollers are separated from the disc.At the lowest position of the rollersDiscRollerX92-4470-0x10OPERATION DESCRIPTION(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 position shouldbe adjusted so that it can be placed precisely on the turntable ofthe traverse chassis. To make this possible, the traverse chassisand outer chassis should be in the locked condition.Since the outer chassis is originally locked on the main unit, ifthe traverse chassis is also locked during playback, the discwould be subjected directly to vibrations of vehicle during driv-ing and the disc signal would be hindered, making the audiointermittent or impossible to be played.To prevent such a problem, the traverse chassis is suspendedfrom the outer case using springs or rubber dampers duringdriving. This positioning protects the disc playback operationsand is referred to as the floating position.(6) Function of slider (L)Slider (L) ensures the mechanism lock position becausethe shafts of the outer chassis are inserted into itsgrooves in the same way as they are inserted into thegrooves 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 certainpoint, the force changes to a reverse force, which sup-ports the jump-up operation of the roller lever.Shafts for locking the traverse chassis (Outer case-integrated design)(4 shafts)Outer-chassisThe shafts of the outer chassis are inserted into the grooves on thesliders.Outer-chassisTraverse chassisSliderOuter-chassisThe shafts of the outer chassis are inserted into the grooves on thesliders.SpringRoller leverReverseforceThe shafts on the outer chassis are disengaged from the grooves onthe slider.Mechanism floating positionMechanism lock positionMechanism lock positionMechanism floating position