Canon iR4570 Series Service Manual

Also see for iR2270 Series: Product description Printer guide User guide Service manual Service manual

Contents

Canon iR4570 Series Service Manual Manual pdf 257 page image

Chapter 77-217.9 Transfer Unit7.9.1 Outline of the Transfer Unit7.9.1.1 Outline 0006-5997iR2270 / iR2870 / iR3570 / iR4570The transfer unit [1] consists of the transfer roller and the static eliminator.The transfer roller rotates in connection with the photosensitive drum.Bias is applied to the static eliminator so that sheets can be separated from the drum.F-7-197.9.2 Controlling the Transfer Bias7.9.2.1 Transfer Roller Bias Control 0006-5998iR2270 / iR2870 / iR3570 / iR4570The machine changes the output depending on the site environment (absolute moisture content), paper type, paperwidth, and source of paper.Environment: 5 settings according to absolute moisture contentPaper type: plain paper, envelope, heavy paper, tracing paper, transparency, bond paper, label sheetPaper width: size boundaries as defined by 2 pointsSource of paper: if from cassette (including pedestal); if from multi-feeder, i.e., 1st side (half-speed), 2nd side (half-speed)Transfer biasTransfer bias: 1000 to 6000 VTransfer bias for cleaning: -2600 VThe transfer bias is used at time of image formation, while a voltage of a specific level is applied between sheets forcleaning of the transfer roller.