Specifications

Q2431-90912 Chapter 7 Troubleshooting 315
Table 58. Drop outs and character voids
Possible cause Recommended action(s)
Printing on the wrong side of the paper.
The label on the ream of paper indicates
which side to print on. The different
surface properties of some papers
might cause problems if the paper is
loaded wrong-side-up.
1. Check the arrow on the paper wrapper. Make sure that the
paper loaded corresponds with the arrow pointing up in
tray 1, or pointing down in the other trays.
2. Turn over the stack of paper in the tray. Also try rotating the
stack 180 degrees. Do not fan the stack.
3. Check the paper (or other media) type and quality. Replace
the media and advise the customer to use the
recommended HP media and to store it correctly.
The media surface is too rough.
● Use paper with the correct finish (smoothness) to meet
HP specifications (see the HP LaserJet Printer Family Paper
Specification Guide).
The media surface is too smooth for
proper toner adhesion.
● Use paper with the correct finish (smoothness) to meet
HP specifications (see the HP LaserJet Printer Family Paper
Specification Guide).
Bad transparencies. Transparencies can
have this problem because they are not
designed for proper toner adhesion.
● Use hp-approved transparencies for monochrome LaserJet
printers (see the HP LaserJet Printer Family Paper Specification
Guide).
The printers operating environment
does not meet specifications.
● Make sure the printer is installed in the proper environment.
See “Environmental specifications” on page 7.
The fuser roller is dirty and is lifting part
of the image off of the paper.
● Process a cleaning page (see chapter 4). several pages might
be required if the fuser is very dirty.
Defective or nearly empty print
cartridge.
● Replace the print cartridge.
Wrong toner density setting.
● Access the print-quality menu at the control panel, and adjust
the toner density setting. See “Print Quality submenu” on
page 46. Make sure EconoMode is set to off.
Wrong fuser setting for media type.
● Access the configure device menu at the control panel, and
change the fuser mode setting or choose another media type.
See “Configure Device menu” on page 44.
Bad transfer roller. If the transfer roller
has finger oils on its surface, is dirty or
worn out, this problem can occur.
● Clean the transfer roller using a dry, lint-free cloth. Do not
touch the transfer roller with your fingers. If the problem persists,
replace the transfer roller. See “Transfer roller” on page 138.
Poor high-voltage contact between the
power supply and the print cartridge or
transfer roller.
● Inspect the contacts and clean them if they are dirty. Replace
them if they are damaged.
The power supply is defective (low
transfer voltage).
● Replace the power supply. See “Power supply” on page 188.