Brother MFC-9340CDW Service Manual

2-109
Confidential
4.8 Troubleshooting of the Fuser Unit
4.8.1 Fuser unit failure
Step Cause Remedy
1 Harness connection failure
between the connector of the
fuser unit and eject sensor
PCB
Check the harness connection between the
connector of the fuser unit and eject sensor
PCB, and reconnect it.
2 Harness connection failure
between the connector of the
fuser unit and low-voltage
power supply PCB
Check the harness connection between the
connector of the fuser unit and low-voltage
power supply PCB, and reconnect it.
3 Harness connection failure of
the eject sensor PCB
Check the harness connection of the eject
sensor PCB and reconnect it.
4 Eject sensor PCB failure
Refer to "1.4.10 Operational check of sensors"
in Chapter 5 and check the operations of
sensors.
If sensor operation failure occurs, replace the
eject sensor PCB ASSY.
5 Low-voltage power supply
PCB failure
Replace the low-voltage power supply PCB
ASSY.
6 Fuser unit failure Replace the fuser unit.
7 Main PCB failure Replace the main PCB ASSY.
Note:
- Turn the power OFF and then ON again. After the machine is left as it is for about 10
minutes, this problem may be resolved.
- If test print is performed in maintenance mode for service personnel, the machine may
recover from the error. However, note that if this operation is performed while the heater
has not cooled down, the fuser unit may melt.

Brother MFC-9340CDW Specifications

Printing Specifications

print speed (black)	up to 23 ppm
print speed (color)	up to 23 ppm
print resolution	up to 600 x 2400 dpi
automatic duplex printing	Yes

Copying Specifications

copy speed (black)	up to 23 cpm
copy speed (color)	up to 23 cpm
copy resolution	600 x 600 dpi
copy reduction/enlargement	25% - 400% in 1% increments

Scanning Specifications

scanner type	Color Flatbed with ADF
document glass size	8.5” x 11.7”
scan resolution (optical)	1200 x 2400 dpi
scan resolution (interpolated)	19200 x 19200 dpi

Fax Specifications

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

Memory and Interfaces

memory (standard/max)	192MB / 192MB
standard interfaces	Wireless 802.11b/g/n, Ethernet, Hi-Speed USB 2.0
usb direct interface	Yes

Supplies and Accessories

black toner cartridge yield	2, 500 pages
cyan toner cartridge yield (standard)	1, 400 pages
magenta toner cartridge yield (standard)	1, 400 pages
yellow toner cartridge yield (standard)	1, 400 pages
cyan toner cartridge yield (high capacity)	2, 200 pages
magenta toner cartridge yield (high capacity)	2, 200 pages
yellow toner cartridge yield (high capacity)	2, 200 pages
drum unit yield	15, 000 pages
belt unit yield	50, 000 pages
waste toner box yield	50, 000 pages
multi-purpose paper	Letter, 500 sheets