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 188.
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 density (RD) sensor
assembly on page 227.
The laser/scanner unit is
defective.
Replace the laser/scanner
assembly. See
Laser/scanner
assembly (Y/M) on page 265 or
Laser/scanner assembly (C/Bk)
on page 272.
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 (Y/M) on page 265 or
Laser/scanner assembly (C/Bk)
on page 272.
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 secondary transfer
assembly. See
Secondary transfer
assembly on page 186.
436 Chapter 7 Solve problems ENWW
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