HP 3150 EN - Manual (Page 161)

EN Image formation troubleshooting 159
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
appear as small,
round, black dots
on the front or back
of a page.
Sometimes
inconsistent stains
appear. The paper you are using does not meet
HP’s paper specifications (for example, it
is too moist or too rough).
You are printing on the wrong side of the
paper.
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.
Problem Cause Solution