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Toshiba 4511, 3511 manual Dot matrix LCD circuit, Structure

Models: 3511 4511

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5.4 Description of Operation

5.4.1Dot matrix LCD circuit

(1) Structure

(640 x 240)

5

Fig. 5-401

The DSP-LCD-350 is an STN blue mode transmissive type LCD with 640x240-dot display capacity. It consists of a driver LSI, frame, printed circuit board, and lateral type CCFL backlight.

*STN: Super Twisted Nematic

*CCFL:Cold Cathod Fluorescent Lamp

(2) Block diagram

XSCL

UD0

UD1

UD2

UD3

WF

LP

IC5 120

LCDEN

IC1	IC2	IC3	IC4
160	160	160	160

LCD PANEL

640 x 240 DOTS

VDD

IC6 120

GND Power supply

V0

VEE

Fig. 5-402

November 2003 © TOSHIBA TEC

5 - 9

e-STUDIO3511/4511 CONTROL PANEL

Image 105

Toshiba 4511, 3511 manual Dot matrix LCD circuit, Structure

Contents

STUDIO3511/4511 Toshiba TEC Corporation Service of Machines General Precautions Regarding the InstallationMain Service Parts for Safety Contents Control circuit for the exposure lamp Control Panel10-1 10.110.2 10-512-1 12.112.2 12.315-1 15.115.2 15.3STUDIO3511/4511 Contents November 2003 Toshiba TEC Specifications SPECIFICATIONS/ACCESSORIES/OPTIONS/SUPPLIESADU PFP LCF System copy speedTo 550 sheets 64-80 g/m2 17-22 lb. Bond Automatic duplexing unit Stackless/switchback typeSheets 64-80 g/m2 17-22 lb. Bond M2 17-22 lb. Bond718 Accessories Supplies OptionsSTAPLE-2000 System ListRadf STAPLE-600STUDIO3511/4511 Specifications November 2003 Toshiba TEC Outline of the Machine Sectional ViewFront side view Drum cleaning blade Recovery bladeDrum cleaner brush Toner recovery augerRear side view Drive system Scan motor Drum cleaner brush motorMain motor Transport motorElectric Parts Layout Unit constructionFront side A4 series Scanner unit Motor, sensor, lampLT series EXPDH1 Switch, PC board, heater, thermostat, other partASD/AUD/CND/SAD/TWD models Standard NAD/MJD models Option Control panel unitProcess unit Motor, sensor, switch, clutch, solenoid Motor, switch S25 S26 M13 Front sideLaser unit Transport unit Paper feeder unitCLT3 CLT5Automatic duplexing unit Bypass unitSFB CLT6 SOL3 ADU CLT7Drive unit Fuser unitPC board unit LGC SYSHDD NIC BRK Symbols and Functions of Various Components Sensors and switches CCL-R-POS-SW CCL-F-POS-SWCST-U-TRY-SNR CST-L-TRY-SNRSolenoids Electromagnetic clutchesPC boards Thermistors and thermostats Lamps and heatersOthers Transformer24GeneralDescription Function of each board CCD board Construction of boards Construction diagram of boardsPage HVT Disassembly and Replacement of Covers and PC boards Covers Front cover / Toner bagReceiving tray Front lower cover Tray back coverFront right cover Left coverLeft upper cover Left rear coverFront upper cover Right upper coverRight rear cover IH terminal coverRight rear hinge cover Right lower coverRight front hinge cover Rear coverUpper rear cover PC boards Logic PC board LGC board A-1 LGC board case LGC boardHard disk HDD System control PC board case SYS board case NIC board / System control PC board SYS board Remove 4 screws and take off the SYS board casePower supply unit High-voltage transformerFlow Fuse board FUS board Noise filterOptions MR-3015 Reversing Automatic Document Feeder Radf Driving PC board DRV boardPage KD-1011 Paper Feed Pedestal PFP Heater is installedKD-1012 Large Capacity Feeder LCF Page Lift up the equipment and take off the LCF MJ-1022 Hanging finisher When PFP/LCF is not installedRemove 2 screws Lift up the finisher and take it off When PFP/LCF is installedPage MJ-1023 Console finisher MJ-1024 Console finisher Page MJ-6004 Hole punch unit Page KN-3511 Bridge unit Remove 2 screws Lift up the punch unit and take it offNovember 2003 Toshiba TEC Expression of Colors and 4-Step Copy Process Copy ProcessPhotocon General Description of Copying ProcessDetails 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 Overview of Operation General OperationDescription of Operation Warming-upDrawer feed copying Upper drawer paper feeding Ready ready for copyingPage Page Scan motor fwd Interruption copying Bypass feed copyingDetection of Abnormality Types of abnormalityDescription of abnormality A-1 Add paper STUDIO3511/4511 General Operation November 2003 Toshiba TEC Registration clutch turned on ↓ Approx 1.2 sec Approx 1.2 secondsPaper jam E010 → The copying operation is Stopped Registration clutch turned OFF Exit sensor detects jamming of the trailing edge PaperAfter approx 1.3 seconds Paper jam E020 → The copying operation isNovember 2003 Toshiba TEC STUDIO3511/4511 General Operation Power on to ready Flow ChartReady Automatic feed copying Main charger on YES Control Panel and Display Panel Control PanelItems Shown on the Display Panel Display Tray Full Ready Saddle StitchChange Drawer To Correct Paper Size CopyingCheck Paper Large Capacity Feeder Cannot PunchThis Size Paper Counter DepartmentTo Correct Media Type Press Basic Radf Structure Dot matrix LCD circuitData Transmission FrameLoad Frame Method of LED display ex Displaying Copy LED display circuitDisassembly and Replacement StopperSlide the stopper and pull it out November 2003 Toshiba TEC STUDIO3511/4511 Control Panel Remove 16 screws and take off the KEY board Function ScannerConstruction Mirror-2 Mirror-3 Scan motor PS-ACC-350 Scanning drive circuitInput/output signals Onno YES Initialization at power-ONOFF YES On no YESGeneral description Control of Exposure LampPWA-CCD CCD PWA-CCDPWA-SLG CPUExposure lamp Control circuit for the exposure lamp General Description of CCD Control Opto-electronic conversionShading correction Automatic Original Size Detection Circuit Principle of original size detectionProcess of detection of original size APS-1 APS-2 APS-3APS-C APS-R APS-1 APS-2 APS-3 APS-C APS-R APS-2 APS-3ST-R Original LEDPhototransistor Original glass Lens coverSLG board cooling fan LT series Automatic original detection sensor APS sensor A4 seriesLens unit Carriages-1 Carriage-1 Carriage Refer to the Service Handbook for more details Platen sensor Carriage home position sensorScanning section control PC board SLG board Image Processing General DescriptionFollowings are the boards used for image processing CCD -201 shows the image processing section of this equipment ConfigurationAsic Asic ACSSYS Board PWA-F-SYS-350 FeaturesExample Functions of image processing circuit’ = + b + Example Reduction Example EnlargementPaper November 2003 Toshiba TEC STUDIO3511/4511 Image Processing Laser Driving PC Board LDR Board LGC Board PWA-F-LGC-350Laser 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 reference clock signal Polygonal motor ON/OFF signalLaser Unit Cooling Fan Polygonal MotorLaser optical unit Laser unit cooling fan Drive System Construction Main MotorDrive circuit of main motor Signal level of motor circuitTransport Motor Drive circuit of transport motor Developer Motor Developer motor rotational direction signal Developer motor on signalDeveloper motor reference clock signal Normal Out of control Developer motor PLL signalDeveloper motor drive unit Developer motor Remove 2 screws and take off the developer motorBlack developer lifting clutch 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 General Descriptions Paper Feeding SystemPage 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 General operation From power-ON to ready status Ready statusBypass feeding Drawer feedingD-1 Lower drawer Drive Circuit of Tray-up Motor IN1 IN2 Brake CCWStop Bypass unit A-1 Bypass unit Bypass tray slide guide width detection PC board Bypass pickup roller Bypass transport rollerBypass paper sensor Bypass pickup solenoidBypass separation roller Bypass feed rollerLower drawer feed sensor/Side cover opening/closing switch Remove the arbor, shaft and springBypass feed sensor Upper drawer feed sensor/Registration sensor Registration roller Feed clutch Drawer feeding unit E-1 Drawer feeding unitSeparation roller Remove 1 screw and take off the separation roller holderCLUTCH-6-L Pickup rollerFeed roller Remove the pulley, one-way clutch and 3 E-rings6Drawer tray-up sensor and Drawer empty sensor Drawer paper stock sensorTray drive unit Tray drive unitRegistration guide Lower transport clutch Low/High speedMiddle guide Drum Related Section Functions Page IC7 Output Control Circuits of High-Voltage TransformerCPU Drum Temperature Detection CircuitTemperature/Humidity Sensor Operation Charger Wire CleanerDrive circuit Cleaner unit Cleaner unit Main charger grid Main charger unit B-1 Main charger unitCharger wire Wire padRemove 1 screw and take off the pad guide Drum Remove the baseCleaner Drum cleaning blade Recovery bladeDrum cleaner brush Drum thermistor Discharge LED unit F-1 Discharge LEDRemove the discharge LED Charger cleaner detection switch Charger cleaner motorToner bag full detection sensor-2 Temperature/Humidity sensor Ozone filterOzone exhaust fan Latch Page Developer Unit Color auto-toner sensor Mixer Developer sleeve Black Toner Cartridge Drive Unit General descriptionsToner motor Functions Black Developer UnitBlack developer unit drive section Black auto-toner sensor circuit LCA301-1Converter Magnetic circuit STUDIO3511/4511 Developer Unit November 2003 Toshiba TEC Black developer unit lifting mechanism Color Developer Unit Gear G21 Color developer unit drive sectionColor auto-toner sensor circuit Page Color toner supply CDVDON-0 CDVAON-0 High-Voltage Transformer Output Control CircuitDeveloper material Black developer unit A-1 Black developer unitPour the developer material Auto-toner sensorDoctor blade Developer sleeve Remove 2 screws and take off the doctor bladeMixer Color developer unit B-1 Developer material Take off the mixer from the hole of front sideDischarge the developer material Pour the developer material Gear assembly Procedure for replacing an oil seal Take off the black developer toner supply unit .7 K Black developer lifting unitBlack toner supply unit Remove 2 screws and take off the cleaner rail stayCartridge switch with the whole bracket Black toner supply auger unit Remove 2 screws and take off the toner motorSTUDIO3511/4511 Developer Unit November 2003 Toshiba TEC Revolver Unit STUDIO3511/4511 Revolver Unit November 2003 Toshiba TEC Drive of Revolver Unit Revolver motor Revolver Motor Drive CircuitHome position detection OperationEscape position movement During warming-upDuring image quality control Color developer unit Color toner cartridgeRear Front Color toner cartridge sensorRemove 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 2nd transfer Outline of 1st transferLCA-301-1 High-Voltage Power Supply1000V PWATransfer belt unit Loosen 3 screws and take off the bracket Transfer belt Stand plate short 1st transfer roller Transfer belt home position sensor-2 Transfer belt home position sensor-1Transfer 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 unit 2nd transfer roller2nd transfer roller contact clutch Paper clinging detection sensor 2nd transfer roller position detection sensorPaper clinging detection sensor Bracket Page Principle of the Sensor Image Quality ControlYES Flow Chart of Control ProcedureVarious image forming conditions Image quality sensor / Image quality sensor Shutter solenoid Fuser Unit / Paper Exit Section Functions Page Heater Control Circuit ConfigurationBook Diagram of High Frequency Power Supply Heating principle of IH HeaterImage of Current Flowing form a to B +5VSW IH control circuit interfaceIH2 on IH1 onFor ASD, AUD, CND OFFFAX Control of the surface temperature of the fuser belt Temperature detection sectionEnergy Saver Reference PC4/AN4 Condtion Priority of error checking Abnormality in the IH control circuit IH error Exit Motor Drive Control Circuit of Exit MotorOil roller Rear side Cleaning rollerFuser roller / Fuser belt guide IH coilBearing Fuser belt guide Fuser belt Separation finger Separation finger unit Thermostat Pressure rollerThermistor Remove 2 screws and take off the thermostat from the bracketExit sensor / Exit finger / Transport guide Exit roller IH control board cooling fan IH control PC board IH boardScraper FlowAutomatic Duplexing Unit ADU Description of Operations Page Page Page Unit msec EquipmentADU entrance sensor ADU exit sensor ADU clutch ADU motor Exit sensor Registration sensor Registration clutchDrive of ADU Yes Command signal Operation of DC Output Circuits Power Supply UnitOutput Channel November 2003 Toshiba TEC STUDIO3511/4511 Power Supply Unit Fuse Charger cleaner motor Power supply Power supply cooling fanBridge unit +24VD2 F54A Semi time-lag +24VD4Toshiba Configuration of Power Supply UnitSequence of Power Supply PWR-DNPWR-EN Scanner AC Wire HarnessSTUDIO3511/4511 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-ADU PWA-F-LDR PWA-F-SNSPWA-F-DSP PWA-F-KEY PWA-F-FIL NAD/SAD/TWD models StandardPWA-F-FUS ASD/AUD/CND models Standard, MJD model Option STUDIO3511/4511 PC Boards November 2003 Toshiba TEC Page Kanda NISHIKI-CHO, CHIYODA-KU, TOKYO, 101-8442 Japan