Epson WorkForce AL-M400DN - Print Quality: Toner Smudges and Missing Areas

Cause What to do
There may be a problem with the photoconductor unit. Replace the photoconductor unit. See “Replacing Consumable
Products/Maintenance Parts” on page 124.
Toner smudges
Cause What to do
Your paper may be moist or damp. Do not store your paper in a humid or damp environment.
You may not be using the correct type of paper for your
printer.
Smooth, high-quality copier paper is recommended for best
results. See “Available paper types” on page 197 for information
on choosing paper.
The paper path inside the printer may be dusty. Clean internal printer components by printing three pages with
only one character per page.
There may be a problem with the toner cartridge. Replace the toner cartridge. See “Replacing Consumable
Products/Maintenance Parts” on page 124.
The Highland setting may not be set correctly for
printing in a location at a high altitude.
Select the appropriate value in Highland of the Printer Adjust
Menu. See“Printer Adjust Menu” on page 89 for details.
The photoconductor unit may be near the end of its
service life.
Replace the photoconductor unit. See “Replacing Consumable
Products/Maintenance Parts” on page 124.
Areas are missing in the printed image
Cause What to do
Your paper may be moist or damp. This printer is sensitive to moisture absorbed by the paper. The
higher the moisture content in the paper, the lighter the printout.
Do not store paper in a humid or damp environment.
You may not be using the correct type of paper for your
printer.
If the surface of your paper is too rough, printed characters may
appear distorted or broken. Smooth, high-quality copier paper is
recommended for best results. See “Available paper types” on
page 197 for information on choosing paper.
AL-M300/AL-M400 Series User's Guide
Troubleshooting 158