HP 3150, 3100 manual Or print is not faded, but vertical white stripes appear on

Problem Cause Solution

Print is faded or you notice a block of vertically aligned white streaks,

or print is not faded, but vertical white stripes appear on the page.

The toner cartridge is getting low on toner.

The HP LaserJet 3100/3150 product needs to be cleaned.

The paper you are using does not meet HP’s paper specifications (for example, it is too moist or too rough).

Toner density setting is not adjusted correctly.

A part of the HP LaserJet 3100/3150 product is damaged.

The internal mirror or optics are contaminated.

The laser/scanner is damaged.

Redistribute the toner or replace the toner cartridge.

See the appropriate sections of Chapter 3, “Maintenance.”

Make sure that the media meets specifications detailed in HP’s media specifications guide.

Adjust the setting from the control panel.

Follow the steps in “Basic troubleshooting” to isolate the problem.

Clean the mirror by blowing air through the laser/scanner to remove any dust particles.

Replace the laser/scanner.

The document scanner needs to be recalibrated.

There is a problem in the contact image sensor.

There is a problem in the formatter.

Follow the instructions later in this chapter to recalibrate the document scanner.

Replace the contact image sensor

Replace the formatter.

Stains or smudges	The paper you are using does not meet
appear as small,	HP’s paper specifications (for example, it
round, black dots	is too moist or too rough).
on the front or back
of a page.	You are printing on the wrong side of the
Sometimes	paper.
inconsistent stains
appear.
	The HP LaserJet 3100/3150 product
	needs to be cleaned.
	The toner cartridge is damaged.

Make sure that the media meets specifications detailed in HP’s media specifications guide.

Remove the paper from the paper input bin and turn it over. (The wrapper on many reams of paper has an arrow indicating the print side.)

See Chapter 3, “Maintenance,” for instructions on cleaning the product and using a cleaning page.

Replace the toner cartridge if maintenance procedures do not improve print quality.

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