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132 Troubleshooting/Maintenance
C4224-90962
Blank pages are
always printing.
The toner cartridge was improperly
installed.
Make sure you removed the entire length
of the sealing tape from the toner
cartridge before you installed it.
The toner cartridge is completely out of
toner.
Replace the toner cartridge.
Discontinuity exists in the high-voltage
contact points.
Perform the “High-voltage power supply
check,” which is discussed later in this
chapter.
There is a problem in a part of the
product.
Print a self-test page. If the page is blank,
follow the steps in “Basic troubleshooting”
to isolate the problem. Replace the laser/
scanner or the ECU as needed.
Print is
misaligned on
the page
(skewed pages).
The paper input bin is overfilled. Remove some of the paper.
The guides are adjusted improperly. Be sure to center the paper with the paper
guides. Also, verify that the paper guides
are not adjusted too tightly or too loosely
against the paper.
The paper’s weight or surface finish does
not meet HP’s specifications.
Make sure that the media meets
specifications detailed in HP’s media
specifications guide.
Scanned images
have black dots
or streaks in top
and bottom
margins.
There is ink, glue, white-out, or some
other substance on the contact image
sensor.
See “Cleaning procedures” in this chapter.
There is a problem in the contact image
sensor.
Replace the contact image sensor.
Table 5-3. Solving image quality problems
Problem Cause Solution