Cleaning Section - Kyocera FS-720 Service Manual

2GL/2FV/2FW

2-1-6 Cleaning section

After the transferring process, the drum needs to be physically cleaned of toner which is residual after the development
process. The cleaning blade is constantly pressed against the drum and scrapes the residual toner off to the sweep roller.
The waste toner is collected at the output end of the sweep roller and sent back to the toner container, into the waste toner
reservoir.
After the drum is physically cleaned, it then must be cleaned to the electrically neutral state. This is necessary to erase any
residual positive charge, ready to accept the uniform charge for the next print process. The residual charge is canceled by
exposing the drum to the light emitted from the eraser lamp (PWB). This lowers the electrical conductivity of the drum sur-
face making the residual charge on the drum surface escape to the ground.
2-1-10
Laser scanner unit
Waste toner reservoir
Figure 2-1-12 Cleaning section
(1) Eraser lamp (PWB)
(2) Cleaning blade
(3) Sweep roller
(4) Drum roller
(5) Sheet sweep
Eraser
lamp
Drum
(PWB)
Figure 2-1-13 Cleaning section
Drum
ERASER
YC8-2
Engine/high
voltage PWB