User Guide

Possible cause Recommended action(s)
A
A
A
A
A
B
B
B
B
B
C
C
C
C
C
a
a
a
a
a
c
c
c
c
c
b
b
b
b
b
(Continued)
Horizontal lines (parallel to the paper-path direction)
If the lines are repeated at a consistent
interval down the page, a repetitive
defect exists.
Use the repetitive defect ruler to
determine the cause of this defect. See
Repetitive-defects troubleshooting.
Sharp, random lines indicate a problem
with the laser/scanner control circuitry.
1 Check the cables between the
dc controller and the laser/scanner
assembly.
2 If the cables are not connected,
connect the cables.
3 If, after checking the cables
between the dc controller and the
laser/scanner, the problem
persists, replace the laser/scanner
assembly. See
Laser/scanner
assembly.
4 If, after replacing the laser/
scanner, the problem persists,
replace the dc controller PCA. See
Dc controller PCA.
5 If, after replacing the
dc controller PCA, the problem
persists, replace the Formatter
assembly. See
Formatter
assembly .
Horizontal scars on the photosensitive
drum.
Replace the print cartridge.
Defective fuser film. Replace the fuser.
Table 7-25 Grey background
Possible cause Recommended action(s)
The media does not meet
specifications or is not stored correctly.
1 Turn over the stack of media in the
tray. Also try rotating the media
180°.
2 Check the media type and quality.
Replace the media if it does not
meet specifications, and advise the
customer to use the HP-
recommended media and to store
it correctly. See
Media
specifications.
The inside of the printer is dirty (toner
leaked out of the print cartridge).
Clean the inside of the printer (see
chapter 3), and install a new print
cartridge.
The operating environment does not
meet specifications.
Make sure that the printer is installed in
an area that meets the environmental
specifications. See Operating
environment.
Table 7-24 Lines (continued)
388 7 Troubleshooting