Brother MFC-9330CDW Service Manual

2-94
Confidential
■ Vertical streaks
Fig. 2-13
<User Check>
- Clean the corona wire of each drum unit for all four
colors.
- Return the cleaning tab of the corona wire to the
position.
- This symptom might stop occurring after making
several prints.
- Refer to the User’s guide and remove the dirt on the
exposure drum using a cotton swab.
- Replace the drum unit or toner cartridge with a new
one.
- Clean the LED ASSY.
- Open the joint cover ASSY and the back cover, and
leave them for 30 minutes or longer to draw moist air
and prevent condensation.
Step Cause Remedy
1 Dirt in the paper feed system Wipe dirt off.
2 FG wires and FG plate
installation failure (Grounding
is not performed properly)
Retighten the screws that hold the FG wires
and FG plate.
Repair the bend of the tray ground spring of
the paper tray.
3 LED ASSY failure Replace the LED ASSY.
4 Scratch and dirt on fuser unit Replace the fuser unit.
Note:
If the machine continuously prints the same pattern including vertical streaks in particular,
black vertical streaks may appear on the paper since the electrostatic performance of the
exposure drum is decreased temporally.
Tray ground spring
Paper tray
<Bottom of paper tray>

Brother MFC-9330CDW Specifications

Print Specifications

print speed black	up to 23 ppm
print speed color	up to 23 ppm
print resolution	up to 600 x 2400 dpi

Copy Specifications

copy speed black	up to 23 cpm
copy speed color	up to 23 cpm
copy resolution	600 x 600 dpi

Scan Specifications

scan resolution optical	1200 x 2400 dpi
scan resolution interpolated	19200 x 19200 dpi
document glass size	8.5” x 11.7”

Fax Specifications

fax modem speed	33.6k bps
fax page memory	up to 500 pages
speed dial locations	200

Paper Handling

auto document feeder capacity	up to 35 pages
paper size maximum	up to 8.5” x 14” (legal)
standard paper capacity	250 sheets

Power and Energy

deep sleep mode power consumption	<2W
automatic duplex printing	Yes
energy star qualified	Yes