Table 3-49Image defects table (continued)

Problem

Sample

Cause

Solution

Image in a particular color does not print in the correct color.

Poor contact exists in the

Clean each contact of the color that

primary charging bias or

produces the missing color. If the

developing bias contacts

problem remains after cleaning,

between the print cartridge

check the contacts for damage.

and the product.

Replace any deformed or damaged

 

parts.

 

 

The print cartridge (primary

Replace the print cartridge of the

charging roller, developing

color that matches the defect.

roller, or photosensitive drum)

 

is defective.

 

 

 

 

 

 

 

 

 

The high-voltage power-supply

Replace the high-voltage power-

 

 

 

 

 

 

 

 

 

lower is defective (no primary

supply lower.

 

 

 

 

 

 

 

 

 

charging bias or developing

 

 

 

 

 

 

 

 

 

 

 

bias output).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The laser/scanner unit is

Replace the laser/scanner assembly.

 

 

 

 

 

 

 

 

 

defective.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dropouts appear.

 

 

 

 

 

 

 

The secondary transfer roller

Replace the secondary-transfer-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

is deformed or has

roller.

 

 

 

 

 

 

 

 

 

deteriorated.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The primary charging roller,

Replace the print cartridge of the

 

 

 

 

 

 

 

 

 

developing roller, or

color that matches the defect.

 

 

 

 

 

 

 

 

 

photosensitive drum is

 

 

 

 

 

 

 

 

 

 

 

deformed or has deteriorated.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The fuser roller is deformed or

Replace the fuser.

 

 

 

 

 

 

 

 

 

has deteriorated.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The high-voltage power-supply

Replace the high-voltage power-

 

 

 

 

 

 

 

 

 

T PCA is defective (no transfer

supply upper.

 

 

 

 

 

 

 

 

 

bias output).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The toner is not fully fused to the

 

 

 

 

 

 

The fuser roller or pressure

Replace the fuser.

 

 

 

 

 

 

 

paper.

 

 

 

 

 

 

roller is scarred or deformed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The thermistor is defective.

Replace the fuser.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The fuser heater is defective.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

500 Chapter 3 Solve problems

ENWW