Brother FAX-8650P - B/W Laser - Fax Service Manual page 169

Trouble
(11) Blurred at either side
(12) Dirt back of paper
(13) Poor fixing
At the printer side
Shake the toner cartridge. If the problem persists, replace it.
l
Check that the equipment is placed on a flat surface.
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Shake the drum unit from left to right and front to back.
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At the printer side
Replace the drum unit.
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Replace the heat-fixing unit.
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At the printer side
Instruct the user to use paper of the recommended weight
l
2
(less than 36 lb./m
Replace the heat-fixing unit.
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VI - 22
Action to be taken
).