Drum Unit, Process Control | Toshiba E-STUDIO900 specification

2.5 DRUM UNIT

2.5.1 PROCESS CONTROL

Drum potential gradually changes for the following reasons:

•Dirty optics, exposure glass

•Dirty charge corona casing, grid plate

•Deterioration of drum sensitivity

What Happens at Power On

Here is a description of what happens while the fusing temperature is below 100°C immediately after the main power switch is switched on (process control must also be enabled with SP3901 001, or this will not happen).

At any time, this process can also be executed manually by using SP2962. However, process control must be enabled with SP3901 001 and the fusing temperature must be below 100°C, or this will not work.

1.Drum potential sensor is calibrated.

2.Drum starts first rotation after fusing temperature reaches 100°C.

3.ID sensor is calibrated (Vsg).

4.Readout from the drum potential sensor is used to adjust:

•Grid voltage (Vg)

•Laser diode (LD) power.

NOTE: This step occurs only if process control is enabled with SP3901 001 (Auto Process Control On/Off Setting). If this SP is disabled, then:

•Development bias is set to the value stored in SP2201 1

•Grid voltage is set to the value stored in SP2001 1

•Laser power is set to the values stored in SP2103

5.TD sensor is calibrated (Vref).

Any SC codes that are generated during auto process control are logged in the memory and do not appear. The machine will continue to operate.

PTM

2-37

B070/B071

Image 62

Toshiba E-STUDIO900 manual Drum Unit, Process Control, What Happens at Power On

Contents

Technical Training Program  2003 Tabs Corporation. All rights reserved Page 1050 Toshiba900 Finisher B478 Introduction Page Flowchart for PRE-TRAINING Manual Contents IMPORTANT Safety Notices Safety and Ecological Notes for Disposal Laser Safety Conventions in this Manual Section Overall Information Page Specifications Copier Engine RAM Power Consumption North America Version Unit W Noise Emission 2 ADF Machine Configuration Machine Comments Code Component Layout Overview Paper Path ADF Copy Process Exposure Laser Exposure Section Detailed Descriptions Page Document Feeder PICK-UP Roller Release Bottom Plate Lift PICK-UP and Separation Original Feed Original Width Original Size DetectionOriginal Length Original Width Sensor Location Original Transport Original Skew Correction Original Inversion and FEED-OUT General Operation Original Inversion Original Exit Single-Sided Original Mode Original Exit Double-Sided Original Mode Scanning Overview Scanner Drive Magnification and Reduction Original Size Detection A4 SEF Image Processing Image Processing Steps and Related SP Modes Image Processing Overview Image Processing Flow PTM Mode Setting Function Image Processing Modes PTM Custom Setting Text Mode Image Quality Image Quality SP AdjustmentsCustom Settings for Each Mode Image Quality Custom Setting Text/Photo Mode Image Quality Custom Setting Photo Mode Dithering Image QualityCustom Setting Photo Mode Error Diffusion Image Quality Custom Setting Pale Mode Image Quality Custom Setting Generation Mode Image Quality Custom Setting Photo Mode Line Width Correction Custom Settings for Each Mode Line Width CorrectionCustom Setting Text Mode Line Width Correction Custom Setting Text/Photo Mode Line Width Correction Custom Setting Pale Mode Line Correction Custom Setting Generation Copy Line Width Correction Background Erase Settings Adjustable for Each Original ModeIndependent Dot Erase Photo Mode Dithering Relation Between the SP and UP SettingsText Mode Photo Mode Error Diffusion Generation Copy Text/Photo ModePale Mode Laser Exposure Auto Power Control APC Laser Exposure Mechanism LD Safety Switches MULTI-BEAM Line Exposure Polygon Mirror Motor 6 1200-DPI Resolution LDA Optical Path Process Control What Happens at Power OnDrum Unit Drum Unit Components Drum Drive Drum Charge Overview Charge Corona Wire Cleaning Drum Cleaning Cleaning Unit Drive Cleaning Blade Pressure and Side-to-Side Movement Others Air Flow Around the Drum Drum Pick-off Pawls Drum Quenching Development Development Mechanism Drive Crossmixing Development Bias Toner Supply and Recycling Toner Bottle Switching Mechanism Toner Bank Toner Near-end, Toner End, Bottle Replacement PTM Toner Bottle Sensors Supplying Toner to the Development Unit PTM Toner Hopper Toner Supply Toner Hopper Empty Detection Toner Recycling and Waste Toner Collection Toner Recycling Paper Feed Drive Vertical Transport Paper Registration Image Transfer and Paper Separation Transfer Belt Unit Lift Transfer Belt Cleaning Toner Collection Drum ANTI-CONDENSATION Heater Fusing OIL Supply and Cleaning PTM Sheets Mode *2 Near-End Paper EXIT/DUPLEX Inverter Feed-in and Jogging Feed-out Duplex Tray Feed Mechanism Basic Duplex Feed Operation Length up to A4/Letter LEF PTM ⇒ 2 ⇒ Longer than A4/Letter LEF PTM Energy Saver Mode Energy Conservation Modes What happens in energy saver mode Energy Saver ModeEntering the energy saver mode Return to stand-by mode What happens in low power mode LOW Power ModeEntering the low power mode What happens in auto off mode Auto OFF ModeEntering auto off mode Returning to stand-by mode Night mode Night ModeNight stand-by mode Entering night stand-by and night modes Section Service Tables Page To Switch to the Copy Window for Test Printing Service Program Mode OperationTo Enter and Exit the SP Mode Using the SP Mode Direct Entry SP Mode Button Summary Here is a short summary of the touch-panel buttons Service Table Key Service Program Mode TablesCopier Service Program Mode Tables SP1-nnn Feed User Program Mode Entering and Exiting User Program Mode PTM Section Installation Page Installation Requirements Environment Machine Level Copier + Finisher Minimum Space RequirementsCopier + Finisher + LCT + By-pass Tray Top View DimensionsSide View Operation Power Switch Power RequirementsMain Power Switch Accessories Copier B070/B071 Description Qty Section Large Capacity Tray Page 51/2 x81/2 Overall Mechanical Information Mechanical Component Layout Symbol Name Function Clutches Electrical Component Descriptions Symbol Name Function Drive Layout Detailed Descriptions Paper Feed PICK-UP and Feed FRR Separation Roller Release Lift Mechanism Paper LiftTray Detection Lift Sensor Bottom Tray Tray Paper Size DetectionTop Tray Tray 1 and Middle Tray Tray Remaining Paper Detection Paper END Detection Section SR860 Booklet Finisher Page Lower Tray SR860 3000 Sheet Booklet Finisher B468Upper Tray Proof Tray Staple Specifications Booklet Staple Specifications Punch Unit B377 Mechanical Compnent Layout Drive Layout PTM TRAY/STAPLER Junction Gates Proof Tray Top of the unit Paper is sent to the top tray PRE-STACKING Vertical Lift Mechanism Upper Tray Just After the Power is Switched onHeight Adjustment During Feed-Out Upper Tray Full Positioning the Lower Tray for Feed-out Lower Tray Height Adjustment During Feed-outLower Tray Lower Tray Full Shift Roller Horizontal Movement Shift MechanismShift Roller Rotation Exit Guide Plate Horizontal alignment Paper PositioningVertical Alignment Stapler Stapling Mechanism Stapler Movement Horizontal Stapler Movement Rotational Stapler Movement Feed OUT Booklet Finishing Booklet Stapling and Folding Initial Folding Final Folding and FEED-OUT Punch Unit B377 Option Punch Drive Mechanism PTM Punch Waste Collection Section Sheet Finisher Page Specification SR840 3000 Sheet Finisher B478 Specification Punch Unit B531 DIP SW Settings Specification Punch Unit A812 Specification Jogger Unit B513 Mechanical Component Layout Symbol Name Function Motors Electrical Component Description Symbol Name Function Upper Tray Junction Drives the tray junction gate Gate 3 4 Upper Tray Mode Sort/Stack Mode Staple Mode Tray and Stapler Junction Gate Paper PRE-STACKING Jogger Unit Paper Positioning Stapler Unit Movement Side-to-Side Rotation Stapler PTM FEED-OUT Paper Exit Stacking Stand-by Mode Shift Tray Shift Tray UP/DOWN Movement Sort/Stack Mode Shift ModeStaple Mode Shift Tray Lower Limit Detection Shift Tray SIDE-TO-SIDE Movement JAM Conditions Punch Unit B531 Option Punch Unit Drive Punch Waste Collection Jogger Unit B513 Option Jogger Unit Mechanical Layout Jogger Unit Drive Section Cover Interposer Tray MJ-7002 Page Cover Interposer Tray Type 1075 B470 Overall Machine Information Main Layout Drive Layout Paper Path Bottom Tray Lift Power OnPaper Separation and Feed Paper Near-end Paper Size Detection Table below lists the sensor output for each paper size B064/B065 Correct Paper Size Display B070/B071 Paper Size Detection Section Multi Bypass Tray Page Multi Bypass Tray Type 2105 B512 Overall Machine Information Electrical Component Layout Electrical Component Descriptions MC9 Drive Layout Detailed Descriptions Paper Feed Paper Size Detection Table below lists the sensor output for each paper size B064/B065 Correct Paper Size Display