High-voltagepower supply PCBsReader unitD-maxD-half Color displacementcorrection controlToner cartridgeLaser scanner unitITB unitColordisplacement/densitysensorSignal from colordisplacement/density signalBiasVideo signalAuto-gradationcorrection control● Execution timingThe table below lists the execution timing and duration of each control.No.Executiontiming Duration D-max D-half Color dis-placementcorrectionRemarks1 Power-ON Approx.195sec-ondsYes Yes Yes Executed at initial rotation2 Toner cartridge replacement Approx.195sec-ondsYes Yes Yes Executed at initial rotation3 Environmentalchanges Approx.195sec-ondsYes Yes Yes Executed after job completionDe-tected by the environment sensor4 After the pre-defined countsprintedApprox.195sec-ondsYes Yes Yes Executed after job completion5 After the pre-defined timeelapsedApprox.195sec-ondsYes Yes Yes Executed after job completion6 Resumed from sleep (after 8hours or more)Approx.100sec-ondsYes Yes - Executed after job completionupon resumed7 Full correction Approx.100sec-ondsYes Yes - Executed by users8 Quick correction Approx.100sec-ondsYes Yes -9 Copy image correction Approx.100sec-ondsYes Yes -● Image density correction control (D-max control)This control is to stabilize the print image density.The DC controller PCB triggers D-max control under the pre-defined conditions.1. Measure the density detection patterns for each color on the ITB.2. Technical Explanation37
