2PK/2PL/2PM/2PN
2-1-14
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 cleaning lamp (PWB). This lowers the electrical conductivity of
the drum surface making the residual charge on the drum surface escape to the ground.
Figure 2-1-19 Cleaning section
1
3
2
Main frame
Waste toner reservoir
Drum unit
1. Cleaning lamp (PWB)
2. Sweep roller
3. Cleaning blade
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