Canon LBP-1120 Service Manual

Also see for Laser Shot LBP-1120: Specifications User guide Getting started guide

Contents

CHAPTER 22 - 28An AC bias is applied to the developing cylinder to help project the toner particles to the drum surface and improvethe contrast of the printed image. The center voltage of the AC bias (1460 Vp-p) varies with the developing DC bias.This printer changes the developing DC bias value according to the IMAGE DENSITY DATA signal sent from theinterface controller. The changes of the developing DC bias value makes the potential difference between the cylinderand drum so that the density of the print can be adjusted.3. Transfer StageIn the transfer stage, the toner image is transferred from the drum surface onto the paper.Step 4: TransferFigure 2-4-10Positive charges are applied to the back of the paper to attract the negatively charged toner particles to the paper.Step 5: SeparationFigure 2-4-11The elasticity of the paper causes it to separate from the drum (curvature separation).To stabilize the paper feed system and to prevent droplets on the printed image at low temperature and low humidity,the charge on the back of the paper is reduced by the static charge eliminator.PaperTransfer charging rollerPhoto-sensitivedrumPaperTransfer charging rollerPhoto-sensitivedrumStatic chargeliminatore