Toshiba 3511, 4511 manual Color auto-toner sensor circuit

Page 224

12.6.3Color auto-toner sensor circuit

(1) General descriptions

The color auto-toner sensor detects the toner amount on the color developer sleeve with the reflec- tion-type photosensor, differing from the black auto-toner sensor. Light-receiving elements of diffuse reflection in this sensor detect the toner amount on the sleeves with the light amount reflected from the sleeve surface. It detects the toner amount at the first forward position from the developing position.

When the toner runs out, it supplies the toner from the toner cartridge with the color toner supply auger driven by the color developer toner supply clutch.

Also, the color auto-toner sensor has a shutter which opens and closes by the solenoid. It prevents stain to the sensor and calibrates the sensor with the reflection from the shutter.

12

Control panel

Display

Execution control unit

PWA-SYS

BC-RAM

GA

CPU

Color toner cartridge sensor

Color developer toner supply clutch control signal

Color developer toner supply clutch

Color auto-toner sensor

Shutter driving

signal

Shutter solenoid

Toner density

signal

Color developer

unit

Color toner

cartridge

Driver	GA
	LCA301
D/A converter
Driver

CPU

OP-AMP

PWA-LGC

Fig. 12-603

e-STUDIO3511/4511 DEVELOPER UNIT

12 - 12

November 2003 © TOSHIBA TEC

Image 224

Contents STUDIO3511/4511 Toshiba TEC Corporation General Precautions Regarding the Installation Service of MachinesMain Service Parts for Safety Contents Control Panel Control circuit for the exposure lamp10.1 10-110.2 10-512.1 12-112.2 12.315.1 15-115.2 15.3STUDIO3511/4511 Contents November 2003 Toshiba TEC SPECIFICATIONS/ACCESSORIES/OPTIONS/SUPPLIES SpecificationsSystem copy speed ADU PFP LCFAutomatic duplexing unit Stackless/switchback type To 550 sheets 64-80 g/m2 17-22 lb. BondSheets 64-80 g/m2 17-22 lb. Bond M2 17-22 lb. Bond718 Accessories Options SuppliesSystem List STAPLE-2000Radf STAPLE-600STUDIO3511/4511 Specifications November 2003 Toshiba TEC Front side view Outline of the MachineSectional View Recovery blade Drum cleaning bladeDrum cleaner brush Toner recovery augerRear side view Drive system Drum cleaner brush motor Scan motorMain motor Transport motorFront side Electric Parts LayoutUnit construction Scanner unit Motor, sensor, lamp A4 seriesLT series EXPSwitch, PC board, heater, thermostat, other part DH1ASD/AUD/CND/SAD/TWD models Standard NAD/MJD models Option Control panel unitProcess unit Motor, sensor, switch, clutch, solenoid Laser unit Motor, switchS25 S26 M13 Front side Paper feeder unit Transport unitCLT3 CLT5Bypass unit Automatic duplexing unitSFB CLT6 SOL3 ADU CLT7Fuser unit Drive unitHDD NIC BRK PC board unitLGC SYS Symbols and Functions of Various Components Sensors and switches CCL-F-POS-SW CCL-R-POS-SWCST-U-TRY-SNR CST-L-TRY-SNRElectromagnetic clutches SolenoidsPC boards Lamps and heaters Thermistors and thermostatsTransformer Others24GeneralDescription Construction of boards Construction diagram of boards Function of each board CCD boardPage HVT Receiving tray Disassembly and Replacement of Covers and PC boardsCovers Front cover / Toner bag Tray back cover Front lower coverFront right cover Left coverLeft rear cover Left upper coverFront upper cover Right upper coverIH terminal cover Right rear coverRight lower cover Right rear hinge coverRight front hinge cover Rear coverUpper rear cover Hard disk HDD PC boards Logic PC board LGC board A-1 LGC board caseLGC board System control PC board case SYS board case Remove 4 screws and take off the SYS board case NIC board / System control PC board SYS boardFlow Power supply unitHigh-voltage transformer Noise filter Fuse board FUS boardDriving PC board DRV board Options MR-3015 Reversing Automatic Document Feeder RadfPage Heater is installed KD-1011 Paper Feed Pedestal PFPKD-1012 Large Capacity Feeder LCF Page MJ-1022 Hanging finisher When PFP/LCF is not installed Lift up the equipment and take off the LCFWhen PFP/LCF is installed Remove 2 screws Lift up the finisher and take it offPage MJ-1023 Console finisher MJ-1024 Console finisher Page MJ-6004 Hole punch unit Page Remove 2 screws Lift up the punch unit and take it off KN-3511 Bridge unitNovember 2003 Toshiba TEC Copy Process Expression of Colors and 4-Step Copy ProcessGeneral Description of Copying Process PhotoconDetails of Copying Process CCD board White background Image is not Developed Photoconductive Photoconductive Layer Aluminum Base Blade cleaning Recovery blade Drum rotation List of Copying Process Conditions Pressure roller Silicon sponge STUDIO3511/4511 Copy Process November 2003 Toshiba TEC General Operation Overview of OperationDescription of Operation Warming-upReady ready for copying Drawer feed copying Upper drawer paper feedingPage Page Scan motor fwd Bypass feed copying Interruption copyingDescription of abnormality A-1 Add paper Detection of AbnormalityTypes of abnormality STUDIO3511/4511 General Operation November 2003 Toshiba TEC Paper jam E010 → The copying operation is Stopped Registration clutch turned on ↓ Approx 1.2 secApprox 1.2 seconds Exit sensor detects jamming of the trailing edge Paper Registration clutch turned OFFAfter approx 1.3 seconds Paper jam E020 → The copying operation isNovember 2003 Toshiba TEC STUDIO3511/4511 General Operation Flow Chart Power on to readyReady Automatic feed copying Main charger on YES Control Panel Control Panel and Display PanelItems Shown on the Display Panel Display Saddle Stitch Tray Full ReadyChange Drawer To Correct Paper Size CopyingThis Size Paper Check PaperLarge Capacity Feeder Cannot Punch Department CounterTo Correct Media Type Press Basic Radf Dot matrix LCD circuit StructureLoad Frame Data TransmissionFrame LED display circuit Method of LED display ex Displaying CopySlide the stopper and pull it out Disassembly and ReplacementStopper November 2003 Toshiba TEC STUDIO3511/4511 Control Panel Remove 16 screws and take off the KEY board Scanner FunctionConstruction Mirror-2 Mirror-3 Scan motor Scanning drive circuit PS-ACC-350Input/output signals Initialization at power-ON Onno YESOFF YES On no YESControl of Exposure Lamp General descriptionPWA-CCD CCD PWA-CCDPWA-SLG CPUExposure lamp Control circuit for the exposure lamp Shading correction General Description of CCD ControlOpto-electronic conversion Process of detection of original size Automatic Original Size Detection CircuitPrinciple of original size detection APS-3 APS-1 APS-2ST-R APS-C APS-R APS-1 APS-2 APS-3APS-C APS-R APS-2 APS-3 Original LEDPhototransistor SLG board cooling fan Original glassLens cover Automatic original detection sensor APS sensor A4 series LT seriesLens unit Carriages-1 Carriage-1 Carriage Refer to the Service Handbook for more details Scanning section control PC board SLG board Platen sensorCarriage home position sensor Followings are the boards used for image processing Image ProcessingGeneral Description CCD Configuration -201 shows the image processing section of this equipmentAsic Asic ACSFeatures SYS Board PWA-F-SYS-350Functions of image processing circuit Example’ = + b + Example Enlargement Example ReductionPaper November 2003 Toshiba TEC STUDIO3511/4511 Image Processing LGC Board PWA-F-LGC-350 Laser Driving PC Board LDR BoardLaser Optical Unit Writing Section Overview Structure STUDIO3511/4511 Laser Optical Unit November 2003 Toshiba TEC Deviation STUDIO3511/4511 Laser Optical Unit November 2003 Toshiba TEC Laser power comparison circuit Laser driver Circuit Constant Polygonal motor ON/OFF signal Polygonal motor reference clock signalLaser Unit Cooling Fan Polygonal MotorLaser optical unit Laser unit cooling fan Drive System Main Motor ConstructionSignal level of motor circuit Drive circuit of main motorTransport Motor Drive circuit of transport motor Developer Motor Developer motor on signal Developer motor rotational direction signalDeveloper motor reference clock signal Normal Out of control Developer motor PLL signalDeveloper motor drive unit Black developer lifting clutch Developer motorRemove 2 screws and take off the developer motor Transport motor drive unit Setscrew Transport motor drive unit Connector Main motor drive unit Tension plate Motor STUDIO3511/4511 Drive System November 2003 Toshiba TEC Paper Feeding System General DescriptionsPage Paper Feeding Section Sectional View Front side Paper Feeding Section Drive System Rear side Operation of bypass pickup roller Operation of drawer pickup roller Separation of paper Bypass feeding General operation From power-ON to ready statusReady status Drawer feedingD-1 Lower drawer Stop Drive Circuit of Tray-up MotorIN1 IN2 Brake CCW Bypass unit A-1 Bypass unit Bypass tray slide guide width detection PC board Bypass transport roller Bypass pickup rollerBypass pickup solenoid Bypass paper sensorBypass feed roller Bypass separation rollerBypass feed sensor Lower drawer feed sensor/Side cover opening/closing switchRemove the arbor, shaft and spring Upper drawer feed sensor/Registration sensor Registration roller Drawer feeding unit E-1 Drawer feeding unit Feed clutchSeparation roller Remove 1 screw and take off the separation roller holderPickup roller CLUTCH-6-LRemove the pulley, one-way clutch and 3 E-rings Feed roller6Drawer tray-up sensor and Drawer empty sensor Drawer paper stock sensorTray drive unit Tray drive unitLower transport clutch Low/High speed Registration guideMiddle guide Drum Related Section Functions Page Output Control Circuits of High-Voltage Transformer IC7Drum Temperature Detection Circuit CPUTemperature/Humidity Sensor Charger Wire Cleaner OperationDrive circuit Cleaner unit Cleaner unit Main charger unit B-1 Main charger unit Main charger gridRemove 1 screw and take off the pad guide Charger wireWire pad Remove the base DrumDrum cleaner brush Cleaner Drum cleaning bladeRecovery blade Remove the discharge LED Drum thermistorDischarge LED unit F-1 Discharge LED Charger cleaner motor Charger cleaner detection switchToner bag full detection sensor-2 Ozone exhaust fan Temperature/Humidity sensorOzone filter Latch Page Developer Unit Color auto-toner sensor Mixer Developer sleeve Toner motor Black Toner Cartridge Drive UnitGeneral descriptions Black Developer Unit FunctionsBlack developer unit drive section Converter Black auto-toner sensor circuitLCA301-1 Magnetic circuit STUDIO3511/4511 Developer Unit November 2003 Toshiba TEC Black developer unit lifting mechanism Color Developer Unit Color developer unit drive section Gear G21Color auto-toner sensor circuit Page Color toner supply High-Voltage Transformer Output Control Circuit CDVDON-0 CDVAON-0Black developer unit A-1 Black developer unit Developer materialDoctor blade Pour the developer materialAuto-toner sensor Remove 2 screws and take off the doctor blade Developer sleeveMixer Take off the mixer from the hole of front side Color developer unit B-1 Developer materialDischarge the developer material Pour the developer material Gear assembly Procedure for replacing an oil seal Black developer lifting unit Take off the black developer toner supply unit .7 KRemove 2 screws and take off the cleaner rail stay Black toner supply unitCartridge switch with the whole bracket Remove 2 screws and take off the toner motor Black toner supply auger unitSTUDIO3511/4511 Developer Unit November 2003 Toshiba TEC Revolver Unit STUDIO3511/4511 Revolver Unit November 2003 Toshiba TEC Drive of Revolver Unit Revolver Motor Drive Circuit Revolver motorOperation Home position detectionEscape position movement During warming-upDuring image quality control Color toner cartridge Color developer unitColor toner cartridge sensor Rear FrontRemove 1 screw and take off the color toner cartridge sensor Revolver home position sensor Revolver unit Lock lever Remove 5 screws and take off the bracket Internal cooling fan Transfer Unit STUDIO3511/4511 Transfer Unit November 2003 Toshiba TEC Page Outline of 1st transfer Outline of 2nd transferHigh-Voltage Power Supply LCA-301-11000V PWATransfer belt unit Loosen 3 screws and take off the bracket Transfer belt Stand plate short 1st transfer roller Transfer belt home position sensor-1 Transfer belt home position sensor-2Transfer belt cleaning unit Remove 1 screw and take off the bracket on the front side Conductive tape Harness clamp Transfer belt cleaner auger motor 2nd transfer roller 2nd transfer unit2nd transfer roller contact clutch 2nd transfer roller position detection sensor Paper clinging detection sensorPaper clinging detection sensor Bracket Page Image Quality Control Principle of the SensorFlow Chart of Control Procedure YESVarious image forming conditions Image quality sensor / Image quality sensor Shutter solenoid Fuser Unit / Paper Exit Section Functions Page Configuration Heater Control CircuitImage of Current Flowing form a to B Book Diagram of High Frequency Power SupplyHeating principle of IH Heater IH control circuit interface +5VSWIH2 on IH1 onFAX For ASD, AUD, CNDOFF Temperature detection section Control of the surface temperature of the fuser beltEnergy Saver Reference PC4/AN4 Condtion Priority of error checking Abnormality in the IH control circuit IH error Control Circuit of Exit Motor Exit Motor DriveOil roller Cleaning roller Rear sideIH coil Fuser roller / Fuser belt guideBearing Fuser belt guide Fuser belt Separation finger Separation finger unit Pressure roller ThermostatRemove 2 screws and take off the thermostat from the bracket ThermistorExit sensor / Exit finger / Transport guide Exit roller IH control PC board IH board IH control board cooling fanFlow ScraperAutomatic Duplexing Unit ADU Description of Operations Page Page Page Equipment Unit msecExit sensor Registration sensor Registration clutch ADU entrance sensor ADU exit sensor ADU clutch ADU motorDrive of ADU Yes Command signal Power Supply Unit Operation of DC Output CircuitsOutput Channel November 2003 Toshiba TEC STUDIO3511/4511 Power Supply Unit Charger cleaner motor Power supply Power supply cooling fan FuseBridge unit +24VD2 F54A Semi time-lag +24VD4Configuration of Power Supply Unit ToshibaPWR-EN Sequence of Power SupplyPWR-DN AC Wire Harness ScannerSTUDIO3511/4511 Power Supply Unit November 2003 Toshiba TEC PC Boards PWA-F-LGC PWA-F-SLG PWA-F-CCD PWA-F-SDV PWA-F-DRV PWA-F-LDR PWA-F-SNS PWA-F-ADUPWA-F-DSP PWA-F-KEY PWA-F-FUS ASD/AUD/CND models Standard, MJD model Option PWA-F-FILNAD/SAD/TWD models Standard STUDIO3511/4511 PC Boards November 2003 Toshiba TEC Page Kanda NISHIKI-CHO, CHIYODA-KU, TOKYO, 101-8442 Japan

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