Control of Exposure Lamp, General description, Cpu | Toshiba 3511

6

6.4 Control of Exposure Lamp

6.4.1 General description

Control circuit for the exposure lamp consists of the following two blocks:

(1)Lighting device for the xenon lamp (Inverter) Turns ON/OFF the exposure lamp.

(2)CCD circuit

This circuit converts the reflected light amount from the original surface and the shading correction plate to electrical signals. The exposure amount is controlled in two ways:

(a)White reference formation - reads the reflected light amount from the white shading correction plate

(b)Black reference formation - reads the light amount at the regulation position with the exposure lamp lights OFF

Original

Shading correction plate

Exposure lamp (Xenon lamp)

Lighting device for xenon lamp (Inverter)

PWA-CCD CCD

PWA-CCDPWA-SLG

Scanner

A/D CPU

Fig. 6-401

e-STUDIO3511/4511 SCANNER

6 - 8

November 2003 © TOSHIBA TEC

Image 118

Toshiba 3511, 4511 manual Control of Exposure Lamp, General description, Pwa-Ccd Ccd Pwa-Ccdpwa-Slg, Cpu

Contents

STUDIO3511/4511 Toshiba TEC Corporation General Precautions Regarding the Installation Service of Machines Main Service Parts for Safety Contents Control Panel Control circuit for the exposure lamp 10.2 10.110-1 10-5 12.2 12.112-1 12.3 15.2 15.115-1 15.3 STUDIO3511/4511 Contents November 2003 Toshiba TEC SPECIFICATIONS/ACCESSORIES/OPTIONS/SUPPLIES Specifications System copy speed ADU PFP LCF Sheets 64-80 g/m2 17-22 lb. Bond Automatic duplexing unit Stackless/switchback typeTo 550 sheets 64-80 g/m2 17-22 lb. Bond M2 17-22 lb. Bond 718 Accessories Options Supplies Radf System ListSTAPLE-2000 STAPLE-600 STUDIO3511/4511 Specifications November 2003 Toshiba TEC Sectional View Outline of the MachineFront side view Drum cleaner brush Recovery bladeDrum cleaning blade Toner recovery auger Rear side view Drive system Main motor Drum cleaner brush motorScan motor Transport motor Unit construction Electric Parts LayoutFront side LT series Scanner unit Motor, sensor, lampA4 series EXP ASD/AUD/CND/SAD/TWD models Standard NAD/MJD models Option Switch, PC board, heater, thermostat, other partDH1 Control panel unit Process unit Motor, sensor, switch, clutch, solenoid S25 S26 M13 Front side Motor, switchLaser unit CLT3 Paper feeder unitTransport unit CLT5 SFB CLT6 SOL3 Bypass unitAutomatic duplexing unit ADU CLT7 Fuser unit Drive unit LGC SYS PC board unitHDD NIC BRK Symbols and Functions of Various Components Sensors and switches CST-U-TRY-SNR CCL-F-POS-SWCCL-R-POS-SW CST-L-TRY-SNR Electromagnetic clutches Solenoids PC boards Lamps and heaters Thermistors and thermostats Transformer Others 24GeneralDescription Construction of boards Construction diagram of boards Function of each board CCD boardPage HVT Covers Front cover / Toner bag Disassembly and Replacement of Covers and PC boardsReceiving tray Front right cover Tray back coverFront lower cover Left cover Front upper cover Left rear coverLeft upper cover Right upper cover IH terminal cover Right rear cover Right front hinge cover Right lower coverRight rear hinge cover Rear cover Upper rear cover LGC board PC boards Logic PC board LGC board A-1 LGC board caseHard disk HDD 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 board High-voltage transformer Power supply unitFlow Noise filter Fuse board FUS board Driving PC board DRV board Options MR-3015 Reversing Automatic Document Feeder RadfPage Heater is installed KD-1011 Paper Feed Pedestal PFP KD-1012 Large Capacity Feeder LCF Page MJ-1022 Hanging finisher When PFP/LCF is not installed Lift up the equipment and take off the LCF When 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 unit November 2003 Toshiba TEC Copy Process Expression of Colors and 4-Step Copy Process General Description of Copying Process Photocon Details 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 Description of Operation General OperationOverview of Operation Warming-up Ready ready for copying Drawer feed copying Upper drawer paper feedingPage Page Scan motor fwd Bypass feed copying Interruption copying Types of abnormality Detection of AbnormalityDescription of abnormality A-1 Add paper STUDIO3511/4511 General Operation November 2003 Toshiba TEC Approx 1.2 seconds Registration clutch turned on ↓ Approx 1.2 secPaper jam E010 → The copying operation is Stopped After approx 1.3 seconds Exit sensor detects jamming of the trailing edge PaperRegistration clutch turned OFF Paper jam E020 → The copying operation is November 2003 Toshiba TEC STUDIO3511/4511 General Operation Flow Chart Power on to ready Ready Automatic feed copying Main charger on YES Control Panel Control Panel and Display Panel Items Shown on the Display Panel Display Change Drawer To Correct Paper Size Saddle StitchTray Full Ready Copying Large Capacity Feeder Cannot Punch Check PaperThis Size Paper Department Counter To Correct Media Type Press Basic Radf Dot matrix LCD circuit Structure Frame Data TransmissionLoad Frame LED display circuit Method of LED display ex Displaying Copy Stopper Disassembly and ReplacementSlide the stopper and pull it out November 2003 Toshiba TEC STUDIO3511/4511 Control Panel Remove 16 screws and take off the KEY board Scanner Function Construction Mirror-2 Mirror-3 Scan motor Scanning drive circuit PS-ACC-350 Input/output signals OFF YES Initialization at power-ONOnno YES On no YES PWA-CCD CCD PWA-CCDPWA-SLG Control of Exposure LampGeneral description CPU Exposure lamp Control circuit for the exposure lamp Opto-electronic conversion General Description of CCD ControlShading correction Principle of original size detection Automatic Original Size Detection CircuitProcess of detection of original size APS-3 APS-1 APS-2 APS-C APS-R APS-2 APS-3 APS-C APS-R APS-1 APS-2 APS-3ST-R Original LEDPhototransistor Lens cover Original glassSLG board cooling fan Automatic original detection sensor APS sensor A4 series LT series Lens unit Carriages-1 Carriage-1 Carriage Refer to the Service Handbook for more details Carriage home position sensor Platen sensorScanning section control PC board SLG board General Description Image ProcessingFollowings are the boards used for image processing CCD Asic Configuration-201 shows the image processing section of this equipment Asic ACS Features SYS Board PWA-F-SYS-350 Functions of image processing circuit Example ’ = + b + Example Enlargement Example Reduction Paper November 2003 Toshiba TEC STUDIO3511/4511 Image Processing LGC Board PWA-F-LGC-350 Laser Driving PC Board LDR Board Laser 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 Laser Unit Cooling Fan Polygonal motor ON/OFF signalPolygonal motor reference clock signal Polygonal Motor Laser optical unit Laser unit cooling fan Drive System Main Motor Construction Signal level of motor circuit Drive circuit of main motor Transport Motor Drive circuit of transport motor Developer Motor Developer motor reference clock signal Developer motor on signalDeveloper motor rotational direction signal Normal Out of control Developer motor PLL signal Developer motor drive unit Remove 2 screws and take off the developer motor 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 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 Ready status General operation From power-ON to ready statusBypass feeding Drawer feedingD-1 Lower drawer IN1 IN2 Brake CCW Drive Circuit of Tray-up MotorStop Bypass unit A-1 Bypass unit Bypass tray slide guide width detection PC board Bypass transport roller Bypass pickup roller Bypass pickup solenoid Bypass paper sensor Bypass feed roller Bypass separation roller Remove the arbor, shaft and spring Lower drawer feed sensor/Side cover opening/closing switchBypass feed sensor Upper drawer feed sensor/Registration sensor Registration roller Separation roller Drawer feeding unit E-1 Drawer feeding unitFeed clutch Remove 1 screw and take off the separation roller holder Pickup roller CLUTCH-6-L 6Drawer tray-up sensor and Drawer empty sensor Remove the pulley, one-way clutch and 3 E-ringsFeed roller Drawer paper stock sensor Tray drive unit Tray drive unit Lower transport clutch Low/High speed Registration guide Middle guide Drum Related Section Functions Page Output Control Circuits of High-Voltage Transformer IC7 Drum Temperature Detection Circuit CPU Temperature/Humidity Sensor Charger Wire Cleaner Operation Drive circuit Cleaner unit Cleaner unit Main charger unit B-1 Main charger unit Main charger grid Wire pad Charger wireRemove 1 screw and take off the pad guide Remove the base Drum Recovery blade Cleaner Drum cleaning bladeDrum cleaner brush Discharge LED unit F-1 Discharge LED Drum thermistorRemove the discharge LED Charger cleaner motor Charger cleaner detection switch Toner bag full detection sensor-2 Ozone filter Temperature/Humidity sensorOzone exhaust fan Latch Page Developer Unit Color auto-toner sensor Mixer Developer sleeve General descriptions Black Toner Cartridge Drive UnitToner motor Black Developer Unit Functions Black developer unit drive section LCA301-1 Black auto-toner sensor circuitConverter Magnetic circuit STUDIO3511/4511 Developer Unit November 2003 Toshiba TEC Black developer unit lifting mechanism Color Developer Unit Color developer unit drive section Gear G21 Color auto-toner sensor circuit Page Color toner supply High-Voltage Transformer Output Control Circuit CDVDON-0 CDVAON-0 Black developer unit A-1 Black developer unit Developer material Auto-toner sensor Pour the developer materialDoctor blade Remove 2 screws and take off the doctor blade Developer sleeve Mixer Take off the mixer from the hole of front side Color developer unit B-1 Developer material Discharge 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 K Remove 2 screws and take off the cleaner rail stay Black toner supply unit Cartridge switch with the whole bracket Remove 2 screws and take off the toner motor Black toner supply auger unit STUDIO3511/4511 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 motor Escape position movement OperationHome position detection During warming-up During image quality control Color toner cartridge Color developer unit Color toner cartridge sensor Rear Front Remove 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 transfer 1000V High-Voltage Power SupplyLCA-301-1 PWA Transfer 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-2 Transfer 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 unit 2nd transfer roller contact clutch 2nd transfer roller position detection sensor Paper clinging detection sensor Paper clinging detection sensor Bracket Page Image Quality Control Principle of the Sensor Flow Chart of Control Procedure YES Various image forming conditions Image quality sensor / Image quality sensor Shutter solenoid Fuser Unit / Paper Exit Section Functions Page Configuration Heater Control Circuit Heating principle of IH Heater Book Diagram of High Frequency Power SupplyImage of Current Flowing form a to B IH2 on IH control circuit interface+5VSW IH1 on OFF For ASD, AUD, CNDFAX Temperature detection section Control of the surface temperature of the fuser belt Energy Saver Reference PC4/AN4 Condtion Priority of error checking Abnormality in the IH control circuit IH error Control Circuit of Exit Motor Exit Motor Drive Oil roller Cleaning roller Rear side IH coil Fuser roller / Fuser belt guide Bearing Fuser belt guide Fuser belt Separation finger Separation finger unit Pressure roller Thermostat Remove 2 screws and take off the thermostat from the bracket Thermistor Exit sensor / Exit finger / Transport guide Exit roller IH control PC board IH board IH control board cooling fan Flow Scraper Automatic Duplexing Unit ADU Description of Operations Page Page Page Equipment Unit msec Exit sensor Registration sensor Registration clutch ADU entrance sensor ADU exit sensor ADU clutch ADU motor Drive of ADU Yes Command signal Power Supply Unit Operation of DC Output Circuits Output Channel November 2003 Toshiba TEC STUDIO3511/4511 Power Supply Unit Bridge unit +24VD2 Charger cleaner motor Power supply Power supply cooling fanFuse F54A Semi time-lag +24VD4 Configuration of Power Supply Unit Toshiba PWR-DN Sequence of Power SupplyPWR-EN AC Wire Harness Scanner STUDIO3511/4511 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-ADU PWA-F-DSP PWA-F-KEY NAD/SAD/TWD models Standard PWA-F-FILPWA-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