OHT sensor on and off during the wait or initial rotation period. If the intensity of the light does not match
the specified value, the DC controller determines that the OHT sensor has failed.
Fusing and delivery unit
The fusing and delivery unit fuses the toner onto the paper and delivers the printed page into the output
bin. The following controls ensure optimum print quality:
●
Loop control
●
Pressure roller pressurization/depressurization control
A sensor detects when the output bin is full, and the DC controller notifies the formatter.
Figure 5-39 Fuser and delivery unit
Fuser/delivery block
Y
M
C
K
Loop control
The loop control monitors the tension of the paper between the second-transfer roller and the fuser.
●
If the fuser rollers rotate more slowly than the secondary transfer rollers, the paper warp increases
and an image defect or paper crease occurs.
●
If the fuser rollers rotate faster than the secondary transfer rollers, the paper warp decreases and
the toner image fails to transfer to the paper correctly, causing color misregistration.
ENWW Pickup, feed, and delivery system 147
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