User Guide

Table 2-50 Image defects table (continued)
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 toner 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 toner cartridge (primary
charging roller, developing
roller, or photosensitive drum)
is defective.
Replace the toner 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.
The laser/scanner unit is
defective.
Replace the laser/scanner assembly.
Dropouts appear.
The secondary transfer roller
is deformed or has
deteriorated.
Replace the secondary-transfer-
roller.
The primary charging roller,
developing roller, or
photosensitive drum is
deformed or has deteriorated.
Replace the toner 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.
The toner is not fully fused to the
paper.
The fuser roller or pressure
roller is scarred or deformed.
Replace the fuser.
The thermistor is defective. Replace the fuser.
The fuser heater is defective.
ENWW
Solve image quality problems
399