Lexmark C520 Service Manual - Page 123

5022-xxx Charging The primary component of the charging process is the high voltage power supply. The following provides information that covers the mechanical transfer of the high voltage through a set of springs to each subcomponent of the charging process. Photoconductor unit (charge roll) The following illustration shows the circuit path that allows high voltage current to flow from the HVPS to the charge roll contact on the photoconductor unit. It is essential that the contact springs are properly touching to provide a good flow. If not, print quality problems will occur. High voltage power supply High voltage contact path Photoconductor unit (photoconductor drum) The following illustration shows the circuit path that allows high voltage current to flow from the HVPS to the photoconductor drum contact on the photoconductor unit. It is essential that the contact springs are properly touching to provide a good flow. If not, print quality problems will occur. High voltage power supply High voltage contact path 3-46 Service Manual