Horizontal lines
Table 7-18 Horizontal lines (perpendicular to the paper-path direction)
Possible cause Solution
1 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 defect ruler.
2 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 Print an engine test page. See
Engine test. If the
defect appears on the engine test page, replace
the dc controller PCA. See
DC controller.
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 dc controller PCA, the
problem persists, replace the Formatter
assembly. See
Formatter cover and formatter.
Image-formation troubleshooting 373
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