HP Color 9850mfp Service Manual - Page 66

I OUTLINE IMAGE CREATION PROCESS hp Color 9850mfp 5. IMAGE CREATION PROCESS 5.1 Image creation flow and function Step Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Sub step 1 Sub step 2 Sub step 3 Sub step 4 Sub step 5 Process Charging process Laser exposure process Developing process 1st transfer process 2nd transfer process Separation process Drum cleaning Pre-charging exposure Transfer belt cleaning 2nd transfer roller L cleaning Toner collection Function Forms the layer of charges on the photosensitive drum. Forms an electrostatic latent image on the photosensitive drum. Makes an electrostatic latent image visible. Forms an image by synthesizing on the transfer belt a monochrome (YMCK) visible image from each photosensitive drum. Transfers an image on the transfer belt to paper. Separates paper from the transfer belt after completion of the transfer of the toner. Removes toner adhered on the surface of the photosensitive drum after completion of the primary transfer. Removes residual potential on the surface against the photosensitive drum after completion of drum cleaning. Removes toner adhered on the surface of the transfer belt after completion of the 2nd transfer. Remove toner adhered on the 2nd transfer roller L after completion of the 2nd transfer. Collects toner that has been removed through the drum cleaning and the transfer belt cleaning. (Not shown in the drawing below.) [11] Sub step 3 [12] Step 4 Sub step 1 [10] Sub step 2 [9] [8] Step 6 [6] [7] [1] Developing unit [2] Write unit [3] Charging corona [4] Pre-charging exposure lamp (PCL) [5] Paper [6] 2nd transfer roller L [4] [3] [1] Step 3 [2] Step 2 Step 1 [5] Step 5 / Sub step 4 [7] Separation discharging unit [8] 2nd transfer roller U [9] Transfer belt [10] Blade (drum cleaning) [11] Blade (transfer belt cleaning) [12] Drum 1-40