HP Enterprise 500 manual 49Image defects table

Table 3-49Image defects table (continued)

Problem Sample Cause Solution

The page is all black or a solid 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 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 print cartridge.

White spots appear in an image

The primary transfer roller is	Replace the ITB.
deformed or has deteriorated.
The secondary transfer roller	Replace the secondary-transfer-
is deformed or has	roller.
deteriorated.

The back of the page is dirty.	The secondary transfer roller	Replace the secondary transfer
	is dirty.	roller.
	The fuser inlet guide or	Clean the dirty parts. If the dirt does
	separation guide is dirty.	not come off, replace the guide.
	The pressure roller is dirty.	Run the cleaning page several times.
		If the issue persists, replace the
		fuser.

Vertical streaks or bands appear on the page.

Scratches are present on the	Replace the print cartridge of the
circumference of the	color that matches the defect.
photosensitive drum.
Scratches are present on the	Replace the fuser.
circumference of the fuser
roller.
Scratches are present on the	Replace the ITB.
circumference of the ITB.
The ITB drive roller is
deformed or has deteriorated.
The ITB cleaning mechanism is
malfunctioning.

498 Chapter 3 Solve problems ENWW