Problem Sample 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 87.
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 and close the front door
several times to clean the RD
sensor. If the problem persists,
replace the RD sensor. See
Registration sensor assembly
on page 112.
The laser scanner unit is
defective.
Replace the laser scanner
assembly. See
Laser scanner
assembly on page 105.
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.
The fuser inlet guide is dirty. Clean the fuser inlet guide.
The printed page contains
misformed characters.
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 on page 105.
Text or graphics are skewed on
the printed page.
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 sensor
assembly. See
Registration sensor
assembly on page 112.
The printed page contains
wrinkles or creases.
The roller or media feed guide
is dirty.
Clean any dirty components.
A feed roller is deformed or
has deteriorated.
Replace any deformed or
deteriorated rollers.
The paper feed guide is
damaged.
Replace the paper-feed-guide unit.
244 Chapter 3 Solve problems ENWW
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