Sharp DM-3551, Operation Manual, Page: 194 / 286

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Printing onto envelopes
●
Do not use envelopes that have metal clasps, plastic snaps, string closures, windows, linings, self-adhesive patches
or synthetic materials. Attempting to print on these may cause misfeeds, inadequate toner adherence or other
trouble.
●
Envelopes of which the surface is not flat because of embossing may cause the prints to become smudged.
● Under high humidity and temperature conditions the glue flaps on some envelopes may become sticky and be sealed
closed when printed.
● Use only envelopes which are flat and crisply folded. Curled or poorly formed envelopes may be poorly printed or may
cause misfeeds.
1 Unlatch the duplex module and slide it to
the left.
Unlatch the module and
gently move the module
away from the machine.
If the machine is not
equipped with a duplex
module, open the side
cover similarly.
2 Lower the two fusing unit pressure
adjusting levers marked A and B in the
illustration.
A
B
Normal position
Lower pressure position
A: Rear side of
fusing unit
B: Front side of
fusing unit
3 Gently close the duplex module.
If the machine is not
equipped with a duplex
module, close the side
cover.
LOADING PAPER
Fusing unit pressure adjusting levers
When feeding envelopes from the multi purpose drawer, damage to the envelopes or smudges on prints may occur
even if envelopes within specification are used. In this case, the problem may be reduced by shifting the fusing unit
pressure adjusting levers from the normal position to the lower pressure position. Follow the procedure below.
NOTE
Be sure to return the lever to the normal position when finished feeding envelopes. If not, inadequate toner adherence,
paper misfeeds or other trouble may occur.