Toshiba DP120F Service Manual page 281

(1) Electrostatic discharge process
The Discharge lamp dissipates the negative charge remaining on the drum before apply-
ing the charges to form an image on the drum. This process cleans the drum surface
electrically to keep the negative charge to be charged on the drum surface at the next
process uniform so that the output image will be uniform.
Refer to the description of the exposure process for the principle of eliminating the charge.
Discharge lamp
(2) Electrostatic charge process
A negative charge is applied to the charger wire which is located inside the Drum unit.
By using the corona discharge, a negative charge is applied equally over the drum sur-
face.
A grid is used to ensure that the negative charge is applied to the drum evenly.
March 2000 © TOSHIBA TEC
Fig. 5-3-18
Charger wire
Fig. 5-3-19
5-21
OPC drum
Charger
Grid
OPC drum
DP120F/DP125F Mechanical Description
05-03-18
05-03-19