Cleaning (General) - Dell 5110cn Service Manual

1.3.12 Cleaning (general)

In the cleaning (general) process, toner stored in the IDT 1 cleaner and IDT 2 cleaner after the finished
toner image is transferred onto the paper and the toner remaining on the BTR are removed.
- The toner not completely transferred in the "secondary transfer" and "tertiary transfer" processes is
held temporarily in the IDT1 Cleaner and IDT2 Cleaner. Also, the toner of which polarity is
reversed and returned to the drum is held in the Refresher. Further, the toner that passes the
Refresher may stick to the RTC.
These toners are cleaned at the completion of the printing. The recovery method is different
between the toner held in the IDT1 Cleaner and IDT2 Cleaner and the toner held in the Refresher
and RTC.
(1) IDT1 Cleaner and IDT2 Cleaner
High voltage equivalent to the voltage at the printing transfer is applied to the IDT1, IDT2, and
BTR. The toner (negative polarity) remaining in the IDT1 Cleaner and IDT2 Cleaner are
moved to the IDT1 and IDT2 electrically by transforming the IDT1 Cleaner and IDT2 Cleaner
to 0V. Then, in the same manner as in the printing transfer, the residual toner is collected to
the BTR surface by potential difference between IDT1, IDT2, and BTR.
HVPS
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IDT1
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IDT1 Cleaner
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IDT1
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IDT1 Cleaner
BTR Voltage > IDT2 Voltage > IDT1 Voltage
6 – 16
Chapter 6 Principles of Operation
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: Positive electric charge
: Toner
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IDT2
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+ BTR
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HVPS
Urethane
blade
IDT2 Cleaner
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HVPS
Ida_Sec06_019FA