KX-MC6020RU, KX-FAP317A, KX-FAB318A - Panasonic Fax Service Manual (repair manual). Page 124

124

As the OPC drum rotates, in contact with the accumulator belt, which is rotating at the same speed. Located under the accumulator
belt at the contact point with the OPC drum, the first transfer roller carries a charge approximately +700 volts (FTR voltage). This
strong potential attracts and holds the toner from the OPC drum to the accumulator belt. The four color layers create while the accu-
mulator belt makes one complete rotation. 
Any toner remaining on the OPC drum after the transfer to the accumulator belt is scraped off by the OPC drum cleaning blade,
which is always in contact with the OPC drum. This leaves the OPC drum clean for the next layer of toner to be transferred from the
developing roller into the developer.

The cam-shaped pickup rollers are driven by the BK (monochrome drum cartridge) drive motor and force a sheet between the
paper feed rollers in the optional lower Input tray. The pickup roller completes only one rotation to pick a sheet of media from the
paper cassette. This will push the sheet of paper to the paper feed rollers but does not pick a second sheet.

The paper feed rollers in the optional lower Input tray advance the sheet of paper to the registration roller. The paper is driven lightly
against the stationary registration rollers to create a slight buckle in the paper, aligning the sheet of paper. At this point, the paper
remains stationary (since the registration roller clutch in the paper feed unit is not yet energized) until the image is ready to be