30 November, 1999 PRINTING
2-11
Detailed
Descriptions
Development Bias
The power pack [A] applies one voltage to the toner application roller [B] and toner
metering blade [C], and a different voltage to the development roller [D].
Bias Control (During Printing)
The power pack applies a charge of -650V to the toner application roller, and
-400V to the development roller. Toner transfers from the toner application roller to
the development roller and on to the laser-exposed areas on the drum as shown
below.
H545D518.WMF
Development Roller
Toner Application Roller
GND
- 750V
- 400V
- 650V
- 200V
Print Data
White Black
Drum Surface Voltage
Toner
Drum Exposed Area
H545D531.WMF
[A]
[B]
[C]
[D]
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