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Chapter 6 Principles of Operation
6-329
(2) Refresher and RTC
High voltage of the polarity (negative) reverse to that at the printing transfer is applied to the IDT1,
IDT2, and BTR. At this time, the drum surface is charged negatively by negative voltage of the
IDT1. The toner (positive polarity) remaining in the Refresher and RTC are move to the drum
electrically by transforming the Refresher and RTC 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.
✧ Toner attached to the surface of BTR is scraper off with the BTR cleaner which is in contact with the
BTR and collected into the collection space in the BTR UNIT ASSY.
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IDT1
IDT1
HVPS
IDT2
HVPS
engine principle0047FA
BTR
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HVPS
Scraper
Drum (Y)
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Drum (M)
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Drum (C)
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Drum (K)
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HTC
Refresher
HTC
Refresher
HTC
Refresher
HTC
Refresher
: Negative electric charge
: Toner
RTC
RTC
RTC
RTC