Table 2-77 Image defects table (continued)
Problem Sample Cause Solution
The page is solid black or a
solid color.
Poor contact exists in the
primary charging bias or
developing bias contacts
between the toner cartridge
and the product.
Clean each contact of the color that
produces the all black or solid color.
If the problem remains after
cleaning, check the contacts for
damage. Replace any deformed or
damaged parts. Replace the
affected toner cartridge.
White spots appear in the
image.
The primary transfer roller is
deformed or has deteriorated
Replace the ITB.
The secondary transfer roller
is deformed or has
deteriorated.
Replace the secondary transfer
roller assembly.
The back of the page is dirty.
The secondary transfer roller
is dirty.
Replace the secondary transfer
roller.
The fuser inlet guide or
separation guide is dirty.
Clean the dirty parts. If the dirt does
not come off, replace the guide.
The pressure roller is dirty. Run the cleaning page several
times. If the issue persists, replace
the fuser.
Vertical streaks or bands
appear on the page.
Scratches are present on the
circumference of the
developing cylinder or
photosensitive drum.
Replace the toner cartridge of the
color that matches the defect.
Scratches are present on the
circumference of the fuser
roller.
Replace the fuser.
Scratches are present on the
circumference of the ITB.
Replace the ITB.
The ITB drive roller is
deformed or has deteriorated.
The ITB cleaning mechanism
is malfunctioning.
ENWW Solve image quality problems 713
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