Panasonic DF-1100 Service Manual page 205

System Description
Transfer and Separation
As the paper is fed between the OPC Drum and the Bias Transfer Roller (BTR) (630), a positive charge of
approximately +600 VDC (+3 µA steady current) is applied to the backside of the paper by the BTR. The
toner particles are attracted away from the drum towards the surface of the paper. During cleaning, the BTR
is charged to approximately –800 VDC to repel toner on the OPC Drum and prevent toner from being
attracted to the BTR. After transfer has occurred, the paper passes over the Discharge Plate (617) in the
Plate Discharge Guide (616), reducing the difference of potential between the OPC Drum and the paper. The
stiffness of the paper causes the paper to separate from the drum.
Cleaning
After transfer, some toner may remain on the surface of the OPC Drum. A Cleaning Blade scrapes the OPC
Drum surface, and the removed toner is moved into the Toner Waste Box, inside the Toner Cartridge.
Fusing
After separation, the paper passes through the Fuser Rollers and is subjected to heat and pressure in the
Fuser Unit (431). Pressure between the Fuser Roller (414) [heated internally by the Fuser Lamp (408) to
approximately 190 C ( 10 C) (or 374 F)] and Pressure Roller (409) fuses or bonds the toner into the paper.
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