HP Color LaserJet Enterprise MFP M680 series - Solve connectivity problems

Table 2-64 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.
ENWW Solve image quality problems 475