HP 5100LE manual Black lines in paper path direction Possible cause Action

Table 34. Black lines (in paper path direction)

Possible cause	Action
Toner cartridge not seated	Remove the toner cartridge and reinsert it.
correctly.
Defective toner cartridge.	Perform the half self-test functional check (see page 224). If the defect
	develops on the print drum, replace the toner cartridge.
Worn or dirty fuser rollers.	Clean the fuser using the cleaning page procedure on page 67. Several
	pages might be required if the fuser is very dirty. If the problem persists,
	replace the fuser.

Static eliminator teeth (just beyond the transfer roller) are contaminated or defective.

Clean the teeth by using a small brush or compressed air. Replace the assembly if it is damaged.

Light is leaking into the printer

Make sure that all covers are in place. Move the printer away from any outside windows.

Table 35. Black lines (opposite paper path direction)

Possible cause	Action
Repetitive defect. If the lines	See “Repetitive defect ruler” on page 223 and replace the offending
are repeated at a consistent	components.
interval down the page, this
is a repetitive defect.
Sharp, random lines	Replace the following in the order indicated:
indicate a problem with the	1.	Laser/scanner assembly.
laser control circuitry.	2.	Dc controller.
	3.	Cables between the dc controller and the laser/scanner.
	4.	Formatter.

210 Troubleshooting Q1860-90918

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