390 Troubleshooting
There may be a problem with
the developer cartridge.
Turn off the printer. Remove the
cartridge, shake it gently from side to
side, and then reinstall it. If this does not
solve the problem, replace the
developer cartridge as described under
“Developer Cartridge” on page 306.
There may be a problem with
the photoconductor unit.
Turn off the printer. Remove the unit,
and then reinstall it. If this does not
solve the problem, replace the
photoconductor unit as described
under “Photoconductor Unit” on page
314.
Black or white bands appear in the printout
Cause What to do
The paper path inside the
printer may be dusty.
Turn off the printer. Clean internal
printer components by printing three
pages with only one character per page.
There may be a problem with
the developer cartridge.
Turn off the printer. Remove the
cartridge, shake it gently from side to
side, and then reinstall it. If this does not
solve the problem, replace the
developer cartridge as described under
“Developer Cartridge” on page 306.
There may be a problem with
the photoconductor unit.
Turn off the printer. Remove the unit,
and then reinstall it. If this does not
solve the problem, replace the
photoconductor unit as described
under “Photoconductor Unit” on page
314.
Missing areas on printed image
Cause What to do
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