Lexmark C500N, Service Manual, Page: 45 / 60

General information
1-23
5023-110
Details of the print system
Charging process
In the charging process, the OPC belt is evenly charged by the charger. See “Printer theory of operation”
on page 1-14 for charger unit location.
The charger unit consists of a charging brush and a discharge roller.
1. The charge brush charges the OPC belt surface to
-Vo(V) potential. The charge on the surface of the OPC belt is then smoothed to an even -Vo(V) by the
discharge roller.
2. The charger unit controls the grid to a constant voltage of ZD(V) for even charging.
3. Before charging, the OPC belt surface is -CBV(V).
The charger unit evenly charges the OPC belt surface to -Vo(V) by generating a negative charge.