MFC-B7700D

常见问题解答与故障排除

Clean the Drum Unit Using Drum Dot Print

If your printout has dots or other repeating marks at 94 mm intervals, the drum may have foreign material, such as glue from a label, stuck on the drum surface.

Make sure the machine is in Ready mode.
Press or to display the [Print Reports] option, and then press OK.
Press or to select the [Drum Dot Print] option.
Press Start.
The machine prints the Drum Dot Check Sheet.
Press and hold to turn the machine off.
Open the front cover.
Remove the toner cartridge and drum unit assembly from the machine.
Turn the drum unit as shown in the illustration. Make sure that the drum unit gear is on the left side.
Use the numbered markers next to the drum roller to find the mark on the drum. For example, a dot in column 2 on the check sheet means that there is a mark in drum region “2”.
Rotate the wheel at the end of the drum unit while pushing the shaded part, as shown in the illustration, to find the mark or foreign material.
IMPORTANT

To avoid print quality problems, DO NOT touch the surface of the drum unit, only the wheel on the end.
Wipe the surface of the drum gently with a dry cotton swab until the mark or foreign material on the surface comes off.

NOTE
DO NOT clean the surface of the photosensitive drum with a sharp object or any liquids.
Install the toner cartridge and drum unit assembly back into the machine.
Close the front cover of the machine.
Press to turn the machine on.