45530603TH Rev.2 2-2Oki Data CONFIDENTIAL 2. DESCRIPTION OF OPERATION(1) Electrophotographic processThe electrophotographic process is explained briefly below:1. ChargingA voltage is applied to the Charging roller to electrically charge the surface of theOPC drum.2. ExposureThe LED head exposures light onto the charged OPC drum in accordance withthe image data. The electric charge of the exposured part of the OPC drumsurface decreases depending on the light, thus forming the electrostatic latentimage on the OPC drum surface.3. DevelopmentCharged toner are adsorbed to the electrostatic latent image of the OPC drumby electrostatic power, and forms toner images on the OPC drum surface.4. TransferThe intermediate transfer belt is arranged in contact with the OPC drum surface.And the electric charges are charged to the belt by the first transfer roller that isarranged at inside of the intermediate transfer belt. Therefore, the toner image istransferred to the intermediate transfer belt. Then, the toner image is transferredto the paper by the second transfer roller.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 for fusing.2.1 Electrophotographic process mechanism(2) ChargingThe voltage is applied to the charging roller, which is arranged in contact with theOPC drum surface, to charge the OPC drum surface.---- --PowersupplyunitCharging rollerOPC drum(3) ExposureThe light emitted from the LED head is exposured onto the charged surface ofthe OPC drum. The charge of the exposured part of the OPC drum decreasesdepending on the light, forming the electrostatic latent image on the OPC drumsurface.---- -- - --PowersupplyunitOPC drumLED headCharging roller
