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1 N o v . ' 8 7
- Automatic Image Density Control -
When automatic image density control is used, the bias depends on the
background image density of the original, which is measured using the
original
ID sensor.
In this mode the bias can take values between 250 volts and 500 volts.
the output of the original ID sensor is 2.4 volts or greater, corresponding to
an original ID of 0.1 or less (white background), the bias becomes 250 volts.
The maximum value of 500 volts is applied if the original ID sensor output is
1.0 volt or less. Between these values, the bias is applied as shown in the
above chart.
2-18
If
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