HP LaserJet Enterprise 500 manual 537

Table 3-49Image defects table (continued)

Problem	Sample	Cause	Solution
Some color is misregistered.		The product is incorrectly	Calibrate the product.
		calibrated.
		The ITB unit is defective.	If the ITB does not rotate smoothly or
			a cleaning malfunction occurs (ITB is
			dirty), replace the ITB.
		The drive gear of the ITB	Check each drive gear between the
		motor is worn or chipped.	ITB drive roller and the ITB motor. If
			the gear is worn or chipped,
			replace the drive unit.

The RD sensor is defective.

Open and close the front door several times to clean the RD sensor. If the problem persists, replace the RD sensor.

	The laser/scanner unit is	Replace the laser/scanner assembly.
	defective.
	The print cartridge is	Replace the print cartridge of the
	defective.	affected color.
Toner smears appear on the	The product has residual	Remove the residual media.
media.	media.
	The fuser inlet guide is dirty.	Clean the fuser inlet guide.
The printed page contains	The product is experiencing	See the “Text or graphics are
misformed characters.	page skew.	skewed on the printed page” row in
		this table.
	The laser/scanner unit is	Replace the laser/scanner assembly.
	defective.
Text or graphics are skewed on	The registration shutter spring	Check the spring and place it in the
the printed page.	is unhooked.	correct position.
	The registration shutter spring	Replace the secondary transfer
	is deformed.	assembly.
The printed page contains	The roller or media feed guide	Clean any dirty components.
wrinkles or creases.	is dirty.
	A feed roller is deformed or	Replace any deformed or
	has deteriorated.	deteriorated rollers.
	The paper feed guide is	Replace the paper-feed-guide unit.
	damaged.

ENWW Solve image quality problems 501