Xerox 6121MFP Mode D'Emploi

Troubleshooting

Phaser 6121MFP Multifunction Printer
User Guide

192

There are toner smudges on the 
back side of the page (whether 
or not it has been printed on 
both sides).

The paper path is dirty with 
toner.

Print several blank sheets and the excess 
toner should disappear.

One or more of the toner 
cartridges is defective.

Remove and inspect the toner 
cartridges. Replace any that are 
defective.

The imaging unit may be 
defective.

Remove the imaging unit and inspect it 
for damage. If damaged, replace it.

Abnormal areas (white, black, 
or color) appear in a regular 
pattern.

The printer’s laser lens is dirty.

Clean the laser lens. See 

on page 168.

A toner cartridge may be 
defective.

Remove and inspect the toner 
cartridges. Replace any that are 
defective.

The imaging unit may be 
defective.

Remove the imaging unit and inspect it 
for damage. If damaged, replace it.

Image defects.

The laser lens is dirty.

Clean the laser lens. See 

on page 168.

A toner cartridge may be 
leaking or defective.

Remove the toner cartridge with the 
color causing the abnormal image. 
Replace it with a new toner cartridge.

The imaging unit may be 
defective.

Remove the imaging unit and inspect it 
for damage. If damaged, replace it.

Lateral lines or bands appear 
on the image.

The printer is not level.

Place the printer on a flat, hard, level 
surface.

The paper path is dirty with 
toner.

Print several blank sheets. The excess 
toner should disappear.

One or more of the toner 
cartridges may be defective.

Remove and inspect the toner 
cartridges. Replace any that are 
defective.

The imaging unit may be 
defective.

Remove the imaging unit and inspect it 
for damage. If damaged, replace it.