HP Enterprise CC490A manual Power supply lower HVPS-D

Problem Sample Cause Solution

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

Dropouts appear.

The toner is not fully fused to the paper.

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-	Replace the high-voltage power-
supply lower is defective (no	supply lower. See High-voltage
primary charging bias or	power supply lower (HVPS-D)
developing bias output).	on page 163.
The laser/scanner unit is	Replace the laser/scanner
defective.	assembly. See Laser/scanner
	assembly (Y/M) on page 186 or
	Laser/scanner assembly (C/Bk)
	on page 190.
The secondary transfer roller	Replace the secondary-transfer-
is deformed or has	roller. See Secondary transfer roller
deteriorated.	on page 90.
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-	Replace the high-voltage power-
supply T PCA is defective (no	supply upper. See High-voltage
transfer bias output).	power supply upper (HVPS-T)
	on page 196.
The fuser roller or pressure	Replace the fuser. See Fuser
roller is scarred or deformed.	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