HP Q3964A 122A Color LaserJet 2550 2800 2820 2830 2840 Drum Cartridge in Retail Packaging

to fully understand how technically complex color printing is take a look at the electro photographic process the primary charge roller or PCR rotates next to the OPC drum and applies a negative charge to the surface of the OPC drum which prepares it for the imaging process the OPC drum is then exposed to a laser which forms the image this area is more positively charged than the area's not exposed to the laser toner is stirred in the hopper the toner add herb roller collects the toner moving it to the surface of the developer roller the doctor blade then levels it to the precise height [Music] as toner moves from component to component it develops a negative charge which is attracted to the more positively charged image on the OPC drop [Music] the toner on the air PC drum is then transferred to the paper this process occurs within the four color cartridges in every laser printer the pa