8.2 TRANSFER ROLLER BIAS
Paper Mode
Normal
Paper
Thick
Paper
OHP:
Sideways
OHP:
Lengthwise
Normal:
Back
Thick:
Back
Dev.
Cycle
1st
1300 1200 2150 2150 1300 1450
2nd
1600 1450 2200 2200 1800 1750
3rd
1900 1750 2500 2500 2100 2050
4th
(Photo)
1600 1450 2200 2200 1800 1750
4th
(Letter)
1600 1450 2200 2200 1800 1750
The transfer roller bias is determined by the output of the humidity sensor. It
is divided into five humidity ranges by four thresholds, to compensate for
changes in the humidity of surrounding areas to maintain constant copy
quality.
The threshold is divided more towards the low humidity side, resulting in
more sensitivity at the low humidity end. This enables more accurate shift of
the transfer bias with small changes in the environment.
Also, the transfer roller bias is changed for each copy mode and the kind of
copy paper currently used.
NOTE:
All values shown on this page are in volts D.C.. values shown
using SP mode <1> SP adjustments, pg 7, are in a data format.
Transfer Roller Bias (Normal Humidity)
Rev. 8/98
<Transfer Roller Bias Coefficient by Humidity Range (1C Mode: Face Side; Normal Paper)>
Detailed
Descriptions
SM 2-31 A172/A199
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