82
Ricoh Co. Ltd.
http://www.ricoh.com/
B245-62 / PD-C4
Slide 82
Transfer Roller Cleaning
A negative cleaning current is applied, followed
by a positive current.
Negatively and positively charged toner particles
are both transferred back to the drum.
The current for the negative-charge phase can be
adjusted with SP 2301-4.
Three conditions for entering cleaning mode:
Before starting a job
» Default: Cleaning is not done before each job, change
with SP 2996 if required.
Just after turning on the power
After a copy paper jam has been removed
More on Transfer Roller Cleaning
Toner may transfer from drum to transfer roller if:
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A paper jam occurred
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The paper size is smaller than the printed image
The transfer roller must be cleaned to prevent toner from being transferred from
the roller to the back side of copies.
¾
There is no mechanism, just the application of positive and negative current
to transfer any adhering toner back to the drum.
The negative current pushes negatively-charged particles back to the
drum.
The positive current pushes positively-charged particles back to the
drum.
¾
Note that the roller is not cleaned before each job unless the setting of SP2-
996 is changed from the default (0). This is to keep the copy speed as high
as possible.
The toner that transfers back to the drum is recycled with the other unused toner.
Paper dust may also find its way into the toner because of this.
