Epson AcuLaser C4000 Reference Manual page 317

You may not be using the
correct type of paper for your
printer.
Black or white bands appear in the printout
Cause
There may be a problem with
the photoconductor unit.
White dots appear in the printout where the toner density is
high
Cause
Duplex printing on damp
coated or thick paper may
produce printouts with white
dots where the toner density is
high on the back of the paper.
Print quality is uneven on the page
Cause
Your paper may be moist or
damp.
There may be a problem with
the photoconductor unit.
Print quality is uneven on thick or coated paper
If the surface of your paper is too rough,
printed characters may appear
distorted or broken. EPSON special
paper, or smooth, high-quality copier
paper is recommended for best results.
See "Available Paper" on page 17 for
information on choosing paper.
What to do
Replace the photoconductor unit. See
"Photoconductor unit" on page 256.
What to do
Do not select Thick (Back) as the Paper
Type setting in the printer driver.
Choose Thick instead.
Do not store coated paper in a humid or
damp environment. Be sure to use
paper that is newly unwrapped.
What to do
Do not store paper in a humid or damp
environment.
Replace the photoconductor unit. See
"Photoconductor unit" on page 256.
Troubleshooting
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