User Guide

Possible cause Recommended action(s)
The fuser is defective. The print will
smear if the fuser does not heat
sufficiently to bond the toner to the
paper.
Replace the fuser. See Fuser.
The dc controller PCA is defective. The
dc controller PCA regulates the fuser
roller temperature.
Replace the dc controller PCA. See
Dc controller PCA.
Table 7-27 Repeating defects and repeating images
Possible cause Recommended action(s)
The print cartridge or fuser is
damaged. The circumference of the
photoconductive drum inside of the
print cartridge is 94.2 mm (3.7 inches).
If the defect repeats at this interval, the
defect is associated with the drum.
Repetitive defects caused by the
LJ 4300 fuser roller repeat at 94.0 mm
(about 3.7 inches). Because the
LJ 4300 fuser roller is only 2 mm
(.07 inch) smaller than the
photoconductive drum, distinguishing
defects that are caused by the
photoconductive drum from those that
are caused by the LJ 4300 fuser roller
can be difficult.
1 Inspect the drum for scratches or
other damage. Replace the print
cartridge for defects that repeat at
37.7 mm (1.5 inches), 62.8 mm
(2.5 inches), 54.0 mm (2.1 inches),
or 94.2 mm (3.7 inches).
2 Process a printer cleaning page.
See
Running the cleaning page
manually.
3 If the problem persists, and the
defect repeats at 75.0 mm
(2.95 inches) or 94.0 mm (about
3.7 inches), replace the fuser (see
Fuser).
For more information about
troubleshooting repeating defects, see
Repetitive-defects troubleshooting.
The rollers are dirty. A dirty roller in the
paper path can cause a repetitive
defect.
Examine and clean (or replace) the
rollers in the paper path.
The media does not meet specifications. Try a different media type or quality.
Preprinted form paper is used. Some preprinted forms (for example,
letterheads) use an ink that cannot
stand up to the high temperatures in
the fuser. Check the media for type
and quality. Replace the media, and
advise the customer to use the HP-
recommended media and to store it
correctly. See
Media specifications.
Table 7-26 Loose toner or toner smear (continued)
390 7 Troubleshooting