HP 5100LE manual Dark print Possible causeAction, Dirt on back Possible cause Action

Table 41. Dark print

Possible causeAction

Wrong toner density setting. From the print-quality menu on the control panel, adjust the toner density setting.

Toner cartridge print drum is	Replace the toner cartridge.
close to the end of its life.
Media does not meet the	1.	Print a few more pages to see if the problem corrects itself.
printer specifications or is	2.	Turn over the stack of paper in the tray. Also try rotating the paper 180°.
stored improperly.	3.	Check the paper (or other print media) type and quality. Replace the
	paper, and advise the customer to use the recommended media and to store
	it correctly.
Poor high-voltage contact to	Clean the contacts if they are dirty. If the problem remains after cleaning, or
the dc controller.	if the contacts are damaged or deformed, replace them.
Defective laser/scanner.	Replace the laser/scanner.
Defective high-voltage	Replace the dc controller.
circuitry.

Table 42. Dirt on back of page

Possible cause	Action
Dirt inside printer (on tray	1.	Print a cleaning page (see page 67).
separation pad or roller,	2.	Print at least 10 pages to see if the problem goes away.
feed roller, transfer roller,	3.	Identify and clean the dirty part. Also see “Repetitive defect ruler” on
fuser, toner cartridge, feed	page 223. If the dirt cannot be removed, replace the dirty part.
belt, feed guide).	4.	Check for toner leaks.
Media does not meet the	1.	Print a few more pages to see if the problem corrects itself.
printer specifications or is	2.	Turn over the stack of paper in the tray. Also try rotating the paper 180°.
stored improperly.	3.	Check the paper (or other print media) type and quality. Replace the

paper, and advise the customer to use the recommended media and to store it correctly.

Q1860-90918 Chapter 7 Troubleshooting 215

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