44072903TH Rev.1 17 /Oki Data CONFIDENTIAL 2. DESCRIPTION OF OPERATION(1) Electrophotographic processThe electrophotographic process is explained briefly below:1. ChargingA voltage is applied to the CH roller to electrically charge the surface of theOPC drum.2. ExposureThe LED head radiates light onto the charged OPC drum in accordance withthe image signal. The electric charge of the radiated part of the OPC drumsurface attenuates depending on the intensity of the light, thus forming anelectrostatic latent image on the OPC drum surface.3. DevelopmentCharged toner adheres to the electrostatic latent image of the OPC drum byelectrostatic power, and forms a visible image on the OPC drum surface.4. TransferPaper is placed over the OPC drum surface and an electric charge is applied toit from the backside by the transfer roller, so that the toner image is transferredto the paper.5. Drum cleaningThe drum cleaning blade removes toner remaining on the OPC drum after thetransfer.6. Belt cleaningThe belt cleaning blade removes toner remaining on the belt.7. FusingHeat and pressure are applied to the toner image on the paper to promote itsfusion.2.1 Electrophotographic process mechanism(2) ChargingA voltage is applied to the charging roller, which is placed in contact with the OPCdrum surface, to charge the OPC drum surface.(3) ExposureThe light emitted from the LED head is radiated onto the charged surface of theOPC drum. The charge of the radiated part of the OPC drum attenuates accordingto the intensity of the light, forming an electrostatic latent image on the OPC drumsurface.---- --PowersupplyunitCharging rollerOPC drum---- -- - --PowersupplyunitOPC drumPaperLED headOPC drumLED headCharging roller
