Problem Cause Solution
Some color is misregistered. The product is incorrectly calibrated. Calibrate the product.
The ITB unit is defective. If the ITB does not rotate smoothly or a
cleaning malfunction occurs (ITB is dirty),
replace the ITB. See
Intermediate transfer
belt (ITB) on page 209.
The drive gear of the ITB motor is
worn or chipped.
Check each drive gear between the ITB drive
roller and the ITB motor. If the gear is worn
or chipped, replace the drive unit.
The RD sensor is defective. Open the close the front door several times
to clean the RD sensor. If the problem
persists, replace the RD sensor. See
Registration density (RD) sensor assembly
on page 297.
The laser/scanner unit is defective. Replace the laser/scanner assembly. See
Laser/scanner assembly (Y/M) on page 325
or
Laser/scanner assembly (C/Bk)
on page 332.
The print cartridge is defective. Replace the print cartridge of the affected
color.
Toner smears appear on the media. The product has residual media. Remove the residual media.
Poor grounding contacts exist
between each print cartridge and the
product.
Clean the grounding contacts on each print
cartridge and the product. If the problem
remains after cleaning, check the contacts
for damage. Replace any deformed or
damaged parts.
The fuser inlet guide is dirty. Clean the fuser inlet guide.
The printed page contains misformed
characters.
The ADF white backing is not
uniformly pressing the source
document against the flatbed glass.
Check the ADF white backing for damage or
warping. Replace the ADF if necessary. See
Automatic document feeder (ADF)
on page 212.
The product is experiencing page
skew.
See the “Text or graphics are skewed on the
printed page” row in this table.
The laser/scanner unit is defective. Replace the laser/scanner assembly. See
Laser/scanner assembly (Y/M) on page 325
or
Laser/scanner assembly (C/Bk)
on page 332.
Text or graphics are skewed on the
printed page.
The ADF input tray guides are not
correctly adjusted.
Make sure that the ADF input tray guides are
adjusted so that they are lightly touching the
sides of the paper stack.
A source document was not picked
up when attempting to feed multiple
documents.
Inspect the ADF pickup and feed rollers and
the ADF separation pad for damage. Clean
the rollers if they are dirty. If the ADF
separation pad or rollers are warn, replace
them. See
ADF roller assembly and
separation pad on page 215.
The registration shutter spring is
unhooked.
Check the spring and place it in the correct
position.
The registration shutter spring is
deformed.
Replace the registration assembly. See
Registration assembly on page 303.
498 Chapter 7 Solve problems ENWW
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