Table 2-54 Image defects table (continued)
Problem Sample Cause Solution
Vertical density variations appear
in a particular color.
The surface of the
photosensitive drum has
deteriorated.
Replace the toner cartridge associated
with the defect.
The laser/scanner is defective. Replace the laser/scanner assembly
Repetitive white spots appear in
the image.
Repetitive white spots appear in
the image.
See the repetitive image defect table.
Clean the indicated roller. If the
contaminant does not come o,
replace appropriate roller or assembly.
The secondary transfer roller is
deformed or has deteriorated.
Replace the secondary transfer roller
assembly.
An unknown substance has
adhered to the primary charging
roller or photosensitive drum.
Replace the toner cartridge associated
with the defect.
The ITB is dirty. Print approximately 20 pages with a
solid colored image.
The ITB is damaged. Replace the ITB.
416 Chapter 2 Solve problems ENWW
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