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Problem Sample Cause Solution
Image in a particular color does
not print in the correct color.
Poor contact exists in the
primary charging bias or
developing bias contacts
between the print cartridge
and the product.
Clean each contact of the color that
produces the missing color. If the
problem remains after cleaning,
check the contacts for damage.
Replace any deformed or damaged
parts.
The print cartridge (primary
charging roller, developing
roller, or photosensitive drum)
is defective.
Replace the print cartridge of the
color that matches the defect.
The high-voltage power-
supply lower is defective (no
primary charging bias or
developing bias output).
Replace the high-voltage power-
supply lower. See
High-voltage
power supply lower (HVPS-D)
on page 163.
The laser/scanner unit is
defective.
Replace the laser/scanner
assembly. See
Laser/scanner
assembly (Y/M) on page 186 or
Laser/scanner assembly (C/Bk)
on page 190.
Dropouts appear. The secondary transfer roller
is deformed or has
deteriorated.
Replace the secondary-transfer-
roller. See
Secondary transfer roller
on page 90.
The primary charging roller,
developing roller, or
photosensitive drum is
deformed or has deteriorated.
Replace the print cartridge of the
color that matches the defect.
The fuser roller is deformed or
has deteriorated.
Replace the fuser.
The high-voltage power-
supply T PCA is defective (no
transfer bias output).
Replace the high-voltage power-
supply upper. See
High-voltage
power supply upper (HVPS-T)
on page 196.
The toner is not fully fused to the
paper.
The fuser roller or pressure
roller is scarred or deformed.
Replace the fuser. See Fuser
on page 85.
The thermistor is defective. Replace the fuser. See Fuser
on page 85.
The fuser heater is defective.
ENWW Solve image-quality problems 413