2A3/4
1-3-31
Correcting toner feed start level
The toner feed start level is corrected based on the absolute humidity and the drive time
so that toner density becomes proper depending on the change of the humidity and the
drive time.
• Correction based on the absolute humidity
0.74
0
0 3.09 10.8
B
A
Maintenance item U130 performed.
35.9
– 0.16
C
D
Absolute humidity
Correction at the toner
feed start level (V)
Figure 1-3-28 Correction based on the absolute humidity
A When maintenance item U130 is carried out for initial developer setting, the toner sensor
control voltage (CONTROL) is set so that the toner sensor outputs 2.01 V when the
absolute humidity is 10.8 g/m
3
.
B When the absolute humidity is between 0 and 10.8 g/m
3
, the toner feed start level is
decreased with the absolute humidity so that the toner sensor output voltage drops.
C When the absolute humidity is between 10.8 and 35.9 g/m
3
, the toner feed start level is
increased with the absolute humidity so that the toner sensor output voltage rises.
D When the absolute humidity exceeds 35.9 g/m
3
, the toner feed start level is increased
by 0.74 V to regulate the toner sensor output.
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