PRINTING 30 November, 1999
2-12
Bias Control (After Each Page)
At the start and the end of any print process (including the cleaning mode), the
power pack applies 0V to the toner application roller, and +250V to the
development roller. This is to prevent toner from transferring to the drum.
Note that the voltage difference between the toner application and development
rollers is kept the same as in printing, at 250 V. This keeps the same amount of
toner on the development roller at all times during the print run.
Toner Application Roller
Development Roller
+ 250V
- 750 V
0V
Drum Surface Voltage
Toner
H545D533.WMF
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