Horizontal white lines
Possible cause Solution
1 The print drum is damaged. 1 If another print cartridge is available, try using
that one to see if the problem goes away.
2 Replace the print cartridge.
2 The fuser roller is damaged. Process a cleaning page. See Cleaning the fuser.
3 The fuser is defective. If the problem persists, replace the fuser. See Fuser.
4 The laser beam or beam circuitry is unstable. 1 Print an engine-test page to determine whether
the defect is related to the print engine or the
formatter. See
Engine test. If the problem does
not appear on the engine-test page, replace the
formatter. See Formatter cover and formatter.
2 Check the cables between the dc controller and
the laser/scanner assembly.
3 If the cables are not connected, connect the
cables.
4 If, after checking the cables between the dc
controller and the laser/scanner, the problem
persists, replace the laser/scanner assembly.
See
Laser/scanner.
5 If, after replacing the laser/scanner, the problem
persists, replace the dc controller PCA. See
DC
controller
6 If, after replacing the dc controller PCA, the
problem persists, replace the Formatter
assembly. See
Formatter cover and formatter.
382 7 Troubleshooting
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