During the following modes, the transfer belt unit is away from the drum
while the transfer belt is rotated.
•
1,000 copies process control
•
Stacking paper in the duplex unit
•
Drum charge roller cleaning
•
Fusing idling
•
Toner end recovery
The transfer belt cleaning blade scrapes off any toner remaining on the
transfer belt, but some toner will be stuck in very small cracks in the transfer
belt (these small cracks are a normal characteristic of the transfer belt).
If there is some negative toner in these cracks, there may be some side
effects, such as the back sides of copies getting dirty. This is because the
negative transfer voltage repels the negatively-charged toner, and this toner
becomes attracted to the back of the copy paper.
After any of the above-stated five modes, to prevent these side effects, the
transfer belt comes into contact with the drum and rotates for 2 seconds
while applying the transfer bias voltage (–1.0 ~ –6.5 kV). As a result of this
negative charge, the negatively-charged toner is repelled and is attracted to
the drum. This toner is then scraped off by the drum cleaning blade.
A156/A160/A162 2-68 STM
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