Brother MFC9700 - Page 172

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Trouble Action to be taken
(15) Dirt back of paper At the printer side
l Clean the pressure roller in the heat-fixing unit. Replace the
heat-fixing unit.
l Replace the drum unit.
l Replace the high-voltage power supply PCB.
(16) Poor fixing At the printer side
l Instruct the user to use paper of the recommended weight
(less than 36 lb./m
2
).
l Clean the toner sensors (LED and light-receiver).
l Replace the toner cartridge.
l Replace the drum unit.
l Check the fitting of the heater thermistor. Replace the heat-
fixing unit.
l Replace the low-voltage power supply PCB.
(17) Ghost At the printer side
l Instruct the user to use paper of the recommended weight
(less than 36 lb./m
2
).
l Replace the drum unit.
l Replace the high-voltage power supply PCB.
(18) Black spots At the printer side
l Gently wipe off the surface of the photo-sensitive drum with a
cotton swab.
l Replace the drum unit.
l Replace the heat-fixing unit.
l Replace the high-voltage power supply PCB.
(19) Light rain At the printer side
l Replace the drum unit.
l Replace the high-voltage power supply PCB.