Brother MFC-9340CDW Service Manual

2-60
Confidential
■ Error code 7700
After the first side is printed in 2-sided printing mode, the registration front sensor does not
detect paper pass after a set period of time.
<User Check>
- Remove the jammed paper.
■ Error code 7900
After the manual feed sensor detects pass of paper fed from the manual feed slot, the
registration rear sensor does not detect paper pass after a set period of time. Or after the
manual feed sensor detects paper pass, the registration rear sensor detects paper pass within
a set period of time.
<User Check>
- Remove paper that is crammed in the manual feed slot.
- Check if the paper whose thickness is not prescribed is used.
- Remove the jammed paper.
- Check if paper is removed after manual feed printing is started.
Jam 2-sided
Pull the paper tray completely out of the machine. Check inside the machine
towards the rear. Or open the Back Cover to remove the jammed paper.
Step Cause Remedy
1 Foreign object inside the duplex
path
Remove foreign object.
2 Fuser cover installation failure Re-assemble the fuser cover.
3 Back cover installation failure Re-assemble the back cover.
4 Main PCB failure Replace the main PCB ASSY.
Jam Manual Feed
Pull out the jammed paper from Manual Feed and press Start
Step Cause Remedy
1 Foreign object inside the manual
feed path
Remove foreign object.
2 Registration rear actuator that
has come off or that has been
caught
Re-assemble the registration rear
actuator.
3 Registration clutch harness
connection failure
Check the registration clutch harness
connection and reconnect it.
4 Registration front/rear/manual
feed sensor PCB harness
connection failure
Check the registration front/rear/manual
feed sensor PCB harness connection and
reconnect it.
5 Registration rear sensor failure Replace the paper feed unit.
6 Registration clutch failure Replace the registration clutch.
7 Main PCB failure Replace the main PCB ASSY.

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