Drum Temperature Detection Circuit, Cpu | Toshiba 4511, 3511

11.4 Drum Temperature Detection Circuit

(1)Purpose of the drum temperature detection circuit

Since the photoconductive characteristic of the drum surface varies drastically depending on the surface temperature of the drum, this circuit detects the temperature of the drum surface to gain the charging potential according to the environment.

(2)Configuration of the drum temperature detection circuit

R9

CPU

VTEMP

AN7

R8

R7

Fig. 11-401

RTemperature/ TH humidity sensor

11

November 2003 © TOSHIBA TEC

11 - 5

e-STUDIO3511/4511 DRUM RELATED SECTION

Image 197

Toshiba 4511, 3511 manual Drum Temperature Detection Circuit, Cpu

Contents

STUDIO3511/4511 Toshiba TEC Corporation Service of Machines General Precautions Regarding the Installation Main Service Parts for Safety Contents Control circuit for the exposure lamp Control Panel 10-1 10.110.2 10-5 12-1 12.112.2 12.3 15-1 15.115.2 15.3 STUDIO3511/4511 Contents November 2003 Toshiba TEC Specifications SPECIFICATIONS/ACCESSORIES/OPTIONS/SUPPLIES ADU PFP LCF System copy speed To 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. Bond 718 Accessories Supplies Options STAPLE-2000 System ListRadf STAPLE-600 STUDIO3511/4511 Specifications November 2003 Toshiba TEC Front side view Outline of the MachineSectional View Drum cleaning blade Recovery bladeDrum cleaner brush Toner recovery auger Rear side view Drive system Scan motor Drum cleaner brush motorMain motor Transport motor Front side Electric Parts LayoutUnit construction A4 series Scanner unit Motor, sensor, lampLT series EXP DH1 Switch, PC board, heater, thermostat, other partASD/AUD/CND/SAD/TWD models Standard NAD/MJD models Option Control panel unit Process unit Motor, sensor, switch, clutch, solenoid Laser unit Motor, switchS25 S26 M13 Front side Transport unit Paper feeder unitCLT3 CLT5 Automatic duplexing unit Bypass unitSFB CLT6 SOL3 ADU CLT7 Drive unit Fuser unit HDD NIC BRK PC board unitLGC SYS Symbols and Functions of Various Components Sensors and switches CCL-R-POS-SW CCL-F-POS-SWCST-U-TRY-SNR CST-L-TRY-SNR Solenoids Electromagnetic clutches PC boards Thermistors and thermostats Lamps and heaters Others Transformer 24GeneralDescription Function of each board CCD board Construction of boards Construction diagram of boardsPage HVT Receiving tray Disassembly and Replacement of Covers and PC boardsCovers Front cover / Toner bag Front lower cover Tray back coverFront right cover Left cover Left upper cover Left rear coverFront upper cover Right upper cover Right rear cover IH terminal cover Right rear hinge cover Right lower coverRight front hinge cover Rear cover Upper 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 NIC board / System control PC board SYS board Remove 4 screws and take off the SYS board case Flow Power supply unitHigh-voltage transformer Fuse board FUS board Noise filter Options MR-3015 Reversing Automatic Document Feeder Radf Driving PC board DRV boardPage KD-1011 Paper Feed Pedestal PFP Heater is installed KD-1012 Large Capacity Feeder LCF Page Lift up the equipment and take off the LCF MJ-1022 Hanging finisher When PFP/LCF is not installed Remove 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 off November 2003 Toshiba TEC Expression of Colors and 4-Step Copy Process Copy Process Photocon General Description of Copying Process 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 Overview of Operation General OperationDescription of Operation Warming-up Drawer feed copying Upper drawer paper feeding Ready ready for copyingPage Page Scan motor fwd Interruption copying Bypass feed copying Description 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 Registration clutch turned OFF Exit sensor detects jamming of the trailing edge PaperAfter approx 1.3 seconds Paper jam E020 → The copying operation is November 2003 Toshiba TEC STUDIO3511/4511 General Operation Power on to ready Flow Chart Ready Automatic feed copying Main charger on YES Control Panel and Display Panel Control Panel Items Shown on the Display Panel Display Tray Full Ready Saddle StitchChange Drawer To Correct Paper Size Copying This Size Paper Check PaperLarge Capacity Feeder Cannot Punch Counter Department To Correct Media Type Press Basic Radf Structure Dot matrix LCD circuit Load Frame Data TransmissionFrame Method of LED display ex Displaying Copy LED display circuit Slide 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 Function Scanner Construction Mirror-2 Mirror-3 Scan motor PS-ACC-350 Scanning drive circuit Input/output signals Onno YES Initialization at power-ONOFF YES On no YES General description Control of Exposure LampPWA-CCD CCD PWA-CCDPWA-SLG CPU Exposure 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-1 APS-2 APS-3 ST-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 LT series Automatic original detection sensor APS sensor A4 series Lens 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 -201 shows the image processing section of this equipment ConfigurationAsic Asic ACS SYS Board PWA-F-SYS-350 Features Example Functions of image processing circuit ’ = + b + Example Reduction Example Enlargement Paper November 2003 Toshiba TEC STUDIO3511/4511 Image Processing Laser Driving PC Board LDR Board LGC Board PWA-F-LGC-350 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 Polygonal motor reference clock signal Polygonal motor ON/OFF signalLaser Unit Cooling Fan Polygonal Motor Laser optical unit Laser unit cooling fan Drive System Construction Main Motor Drive circuit of main motor Signal level of motor circuit Transport 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 signal Developer 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 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 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 pickup roller Bypass transport roller Bypass paper sensor Bypass pickup solenoid Bypass separation roller Bypass feed roller Bypass feed sensor Lower drawer feed sensor/Side cover opening/closing switchRemove the arbor, shaft and spring 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 holder CLUTCH-6-L Pickup roller Feed roller Remove the pulley, one-way clutch and 3 E-rings6Drawer tray-up sensor and Drawer empty sensor Drawer paper stock sensor Tray drive unit Tray drive unit Registration guide Lower transport clutch Low/High speed Middle guide Drum Related Section Functions Page IC7 Output Control Circuits of High-Voltage Transformer CPU Drum Temperature Detection Circuit Temperature/Humidity Sensor Operation Charger Wire Cleaner Drive circuit Cleaner unit Cleaner unit Main charger grid Main charger unit B-1 Main charger unit Remove 1 screw and take off the pad guide Charger wireWire pad Drum Remove the base Drum cleaner brush Cleaner Drum cleaning bladeRecovery blade Remove the discharge LED Drum thermistorDischarge LED unit F-1 Discharge LED Charger cleaner detection switch Charger cleaner motor Toner 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 Functions Black Developer Unit Black 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 Gear G21 Color developer unit drive section Color auto-toner sensor circuit Page Color toner supply CDVDON-0 CDVAON-0 High-Voltage Transformer Output Control Circuit Developer material Black developer unit A-1 Black developer unit Doctor blade Pour the developer materialAuto-toner sensor Developer sleeve Remove 2 screws and take off the doctor blade Mixer Color developer unit B-1 Developer material Take off the mixer from the hole of front side Discharge 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 unit Black toner supply unit Remove 2 screws and take off the cleaner rail stay Cartridge switch with the whole bracket Black toner supply auger unit Remove 2 screws and take off the toner motor STUDIO3511/4511 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 Circuit Home position detection OperationEscape position movement During warming-up During image quality control Color developer unit Color toner cartridge Rear Front Color toner cartridge sensor 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 2nd transfer Outline of 1st transfer LCA-301-1 High-Voltage Power Supply1000V 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-2 Transfer belt home position sensor-1 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 unit 2nd transfer roller 2nd transfer roller contact clutch Paper clinging detection sensor 2nd transfer roller position detection sensor Paper clinging detection sensor Bracket Page Principle of the Sensor Image Quality Control YES Flow Chart of Control Procedure Various image forming conditions Image quality sensor / Image quality sensor Shutter solenoid Fuser Unit / Paper Exit Section Functions Page Heater Control Circuit Configuration Image of Current Flowing form a to B Book Diagram of High Frequency Power SupplyHeating principle of IH Heater +5VSW IH control circuit interfaceIH2 on IH1 on FAX For ASD, AUD, CNDOFF Control of the surface temperature of the fuser belt Temperature detection section Energy Saver Reference PC4/AN4 Condtion Priority of error checking Abnormality in the IH control circuit IH error Exit Motor Drive Control Circuit of Exit Motor Oil roller Rear side Cleaning roller Fuser roller / Fuser belt guide IH coil Bearing Fuser belt guide Fuser belt Separation finger Separation finger unit Thermostat Pressure roller Thermistor Remove 2 screws and take off the thermostat from the bracket Exit sensor / Exit finger / Transport guide Exit roller IH control board cooling fan IH control PC board IH board Scraper Flow Automatic Duplexing Unit ADU Description of Operations Page Page Page Unit msec Equipment ADU entrance sensor ADU exit sensor ADU clutch ADU motor Exit sensor Registration sensor Registration clutch Drive of ADU Yes Command signal Operation of DC Output Circuits Power Supply Unit Output 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 +24VD4 Toshiba Configuration of Power Supply Unit PWR-EN Sequence of Power SupplyPWR-DN Scanner AC Wire Harness 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-ADU PWA-F-LDR PWA-F-SNS PWA-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