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Possible Cause Recommended Action
1. Paper is loaded incorrectly. If the paper is not
installed flush into the paper tray, a skewing
problem will result.
Remove paper from the tray and install paper
correctly. Position the paper guide correctly for
the paper size being used.
2. Bad Paper Lot. Paper that is manufactured
poorly or inconsistently, or that has too smooth
or too rough a surface texture can cause an
image skew problem.
Try a different paper lot (see
HP LaserJet Printer
Family Paper Specifications Guide
).
3. Worn Pickup and/or Registration Rollers.
Paper is not being picked-up consistently.
Inspect all paper path rollers, looking for wear,
cracks, or glazing. Replace the worn rollers.
Possible Cause Recommended Action
1. Photosensitive drum inside toner cartridge is
not grounded.
1. Check for proper mounting of HVPS and
HVPS ground contacts on the toner cartridge.
2. Check for proper seating of toner cartridge.
3. Replace the toner cartridge.
2. Defective HVPS. Replace the HVPS.
3. Leaking toner cartridge. Replace the toner cartridge.
4. Paper does not meet specs. The paper
moisture content, conductivity, or surface finish
may not work correctly with the
electrophotographic process.
Try a different paper lot (see
HP LaserJet Printer
Family Paper Specifications Guide
).
Possible Cause Recommended Action
1. Toner cartridge is nearly empty. This can
cause uneven toner distribution.
Remove the toner cartridge and shake it gently.
The cartridge will soon require replacement.
2. Toner cartridge has been exposed to too much
light.
Store the toner cartridge in a darkened
environment for several days. This may restore
the photosensitive potential.
3. Foreign objects in beam path. Any foreign
objects will block the light from developing an
image on the Photosensitive drum.
Remove the toner cartridge and check for
damage. Replace the toner cartridge if it is
damaged.
Remove the printer cover and inspect the path
from the Laser/Scanner to the toner cartridge
drum, looking for foreign objects in the beam path.
Table 7-17 Image Skew
Table 7-18
Bubble Print
Table 7-19
White Stripes (parallel to path)
7
Troubleshooting
7-71