C5100 Troubleshooting • 149
Faint shading on unprinted sections
Blurred letter edges
One side of printed pages appears blurred
Possible cause Remedy
Paper has been
affected by static
electricity.
Store paper within specified temperature and
humidity levels (see “Specifications” on
page 152).
Paper is too thick. Use recommended paper (see “Media Weight
Designations” on page 11).
Toner is low. Replace toner cartridge (see “Toner Cartridge
Replacement” on page 87).
Possible cause Remedy
LED is dirty. Clean LED with lens cleaner or soft tissue.
Cannot print desired
color because toner
is low.
Replace toner cartridge (see “Toner Cartridge
Replacement” on page 87).
Possible cause Remedy
Top cover is not
properly closed.
Press the cover release latch and open, then
close, the cover.
One or more of the
toner cartridges is
not seated properly.
Open the top cover and check to be sure that
each toner cartridge is fully seated and that each
toner cartridge lock lever is pushed all the way
back.
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