7-60 Troubleshooting
EN
Table 7-20. Horizontal Black Lines
Possible Cause Action
Defective Laser
Scanner Assembly or
Engine Controller
Board.
1. Reseat connectors on the Laser Scanner and
Engine Controller Board.
2. Replace the Laser Scanner Assembly followed by
the Engine Controller Board, if necessary.
See the “Repetitive Defect Ruler” on page 7-66.
Table 7-21. Horizontal Smudges
Possible Cause Action
Paper path
contamination or
damage.
1. Check the Toner Cartridge and replace it if
necessary.
2. Check the Fuser and replace it if necessary.
See the “Repetitive Defect Ruler” on page 7-66.
Table 7-22. Horizontal White Lines
Possible Cause Action
1. Check the Toner Cartridge and replace it if
necessary.
2. Check the Fuser and replace it if necessary.
3. Replace the Laser Scanner Assembly, followed by
the Engine Controller Board, if necessary.
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