Canon LBP-250 사용자 설명서

If toner powder adheres to the pressure roller, black specks 1 mm in 
diameter or larger might appear on the front or back of the printed paper.

1.

Use the Options menu in the Status Window to print the cleaning 
page on a blank sheet of paper.

2.

If there are no black specks on the cleaning page, the pressure roller 
is clean.

3.

If there are black specks on the cleaning page, repeat step 1 until 
there are no black specks on the cleaning page. You may repeat this 
procedure several times with no adverse effect on the printer.

This occurs with high-volume printing in a hot environment.

1.

Increase the printing density.

2.

If this has no effect, replace the EP-22 cartridge.

If there is a strong light source near the printer, the prints may be too 
dark.

1.

Check whether the density adjustment is correct. If not, adjust the 
density.

2.

Check whether there is a strong light source near the printer. If there 
is, move the printer or the light source.