EN Chapter 7 Troubleshooting 241
Vertical black
lines
Defective toner cartridge. Replace the toner cartridge.
Contaminated fuser entrance
guide.
Clean the guide.
Scratches on the fuser. Replace the fuser.
Worn fuser film. 1. Set the fuser to a lower
temperature mode.
2. Replace the fuser.
Note
To prevent the print-quality
problem, reduce printing on large
volumes of narrow media, such
as envelopes. Instead, alternate
smaller volumes of narrow media
with full-page printing jobs.
Vertical dots Contaminated static eliminator
teeth.
Clean the static eliminator.
Poor contact between the static
eliminator and the engine
controller board.
Clean the contacts, if
contaminated. If the problem
remains after cleaning, or parts
are damaged or deformed,
replace them.
Deformed or deteriorated transfer
roller.
Replace the transfer roller.
Defective engine controller board. Replace the engine controller
board.
Vertical white
lines
Lack of toner or faulty toner
cartridge.
Redistribute the toner in the toner
cartridge. If the problem
continues, replace the toner
cartridge.
Contamination in the laser path. 1. Clean the laser path. (Remove
the laser/scanner assembly and
clean the lens.)
2. Replace the laser/scanner
assembly.
Defective fuser. Replace the fuser assembly.
Table 42. Image defects
Problem Cause Solution
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