Chapter 66-36.2 Image Formation Process6.2.1 Image Formation Process 0017-4330iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018iThe image formation system of this machine consist of a primary charging roller, a drum unit integrated with a drum cleaner, a toner bottle, a developing assembly,a transfer charging roller, and so on.The image formation process of this machine is composed of the following five blocks (7 steps):[1] Electrostatic latent image formation blockStep 1: Primary charging (AC & Minus DC)Step 2: Laser exposure[2] Developing blockStep 3: Developing (AC & Minus DC bias)[3] Transfer blockStep 4: Transfer (Plus DC)Step 5: Separation (Minus DC)[4] Fixing blockStep 6: Fixing (Minus DC bias)[5] Drum cleaning blockStep 7: Drum cleaningF-6-26.3 Basic Sequence6.3.1 Basic Sequence of Operation 0017-4331iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018iThe basic sequence of operation of this machine is explained below.For more details, refer to the explanation of various types of bias control.- At power-on (when the door is opened/closed)The main motor starts rotating after completion of the error check.To prevent fogging of the drum, the developing DC bias voltage is held higher than usual during application of the developing AC bias voltage.F-6-37. Drum cleaning1. Primary charging2. Laser beam exposure3. Development4. Transfer5. SeparationCassette pickupManual feed pickupRegistration6. Fixing Delivery3. Transfer block4. Fixing block2. Developing block5. Drum cleaning block1. Electrostatic latentimage formation blockRotational direction ofphotosensitive drumPaper flowCleaning biasWAIT STBYMain motor(M204)Scanner motor(M203)Primary chargingAC biasPrimary chargingDC biasDevelopingAC biasDevelopingDC biasTransfer biasStatic eliminatorbiasFixing film biasPower ONorDoor open/close
