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TROUBLESHOOTING AND ROUTINE MAINTENANCE
22 - 12
Printouts are too dark Adjust the print conditions by setting the Print
or light. Density function. It has been factory set to the
middle position. (See Setting the Print
Density, on page 5-4.)
Printed pages contain You may fix this by wiping the scanner windows
white stripes. with a clean soft cloth. (See Routine
Maintenance and Cleaning the Drum Unit,
on pages 22-17 and 22-19.) If you still see
white stripes or faint images and the display
shows CHANGE DRUM SOON, replace the
drum unit with a new one. Check the machine’s
environment. Conditions such as humidity, high
temperatures, etc. may cause this print defect to
occur.
Printed pages are Clean the machine’s interior and the primary
stained corona with wire of the drum unit. (See Routine Maintenance
toner or have vertical and Cleaning the Drum Unit, on pages 22-17
stripes. and 22-19.) Make sure that the tab of the corona
wire is at the home position.
If after cleaning, you still see dark stripes or
toner stains and the display shows CHANGE
DRUM SOON, replace the drum unit with a
new one.
Printed pages have Make sure that you use paper that meets the
white spots in black specifications. Rough surface or thick media can
text and graphic areas. cause the problem. If you still see white spots
and the display shows CHANGE DRUM
SOON, replace the drum unit with a new one.
Check the machine’s environment; conditions
such as high humidity may cause this situation
to occur.
Toner scatters and Adjust the print conditions by setting the Print
stains the printed Density function. Remove the drum unit and
page. clean the machine’s interior. (See Routine
Maintenance, Cleaning the Printer and
Cleaning the Drum Unit, on pages 22-17 and
22-19.) Make sure that you use paper that
meets specifications. (See page 2-6.) If you
still have scattered toner and the display shows
CHANGE DRUM SOON, replace the drum
unit with a new one. Check the machine’s
environment; high temperature and high
humidity may cause this condition to occur.
The whole page is Clean the machine’s interior and the primary
printed black. corona wire of the drum unit. (See page 22-19.)
Also, do not use heat-sensitive paper as it will
cause this problem. After cleaning, if the printed
pages are still black or the display shows
CHANGE DRUM SOON, replace the drum unit
with a new one. The drum unit may be damaged.
Difficulty Suggestions
Dark Stripes or
Toner Stains
White Spots
Print
Quality
Difficulties
White Stripes or
Faint lmages
Scattering Toner
Black Page