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15 July 1996
1.3.7 V
Correction
R
[–V]
Drum
Potential
–770
Dark
Potentials (V
, V
R
D
only when the fusing temperature is less than 100°C after the machine is
turned on.)
During the check cycle, the V
potential on the area where exposed by each pattern is checked by the
potential sensor.
Compare the curve of the V
curve of the new drum, they are parallel but the compensated potential is still
higher (V
) than the new drum potential. To prevent dirty backgrounds due to
R
increased residual potential, development bias (V
V
= V
+ (–220)
BB
R
V
D
V
R
V
R
–140
Original Density
, V
) are monitored by the potential sensor. (This is done
L
and V
D
and V
D
Development Bias (V
V
L
V
D
A176D508.wmf
patterns are exposed and the drum
L
compensated drum potential with the
L
) is applied as follows:
BB
2-9
PROCESS CONTROL
BB
and V
Compensated
L
New Drum
V
R
Light
)
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