Brother MFC 9420CN User Manual

Chapter C
C - 36
4Hold the handles on both sides as you 
take the fusing unit out of the machine.
5Put the new fusing unit into the machine. 
Be sure to insert the fusing unit 
completely into the machine.
6Secure the fusing unit with the two lock 
levers that are on both sides of the 
fusing unit.
7Move the fusing unit pressure release 
levers to the Set position.
8Close the scanner unit and the back 
cover.
9Turn the machine’s power switch back 
on.
 

Troubleshooting and routine maintenance
C - 37
C
Reset the Fusing Unit life counter
1Press Menu/Set, 7, 4. 
2Press ▲ or ▼ to select Fusing Unit 
and press Menu/Set.
The confirmation message appears on 
the LCD.
3Press 1 to reset the life counter.
—OR—
Press 2 to cancel.
Replacing the transfer belt 
cleaner
1Turn off the machine’s power switch.
2Open the scanner unit.
3Open the inside cover of the machine so 
that it latches under the scanner unit.
CAUTION
Please be careful when replacing the 
fusing...

Chapter C
C - 38
4Remove the transfer belt cover.
5Remove the transfer belt cleaner by 
grasping the handle and lifting it up.
6Clean the area where the new transfer 
belt cleaner is to be installed with a dry 
cotton cloth.
7Put the new transfer belt cleaner into the 
machine by gently placing the brass 
bearings into the guides, and then 
pushing the handle down until the 
bearings click into place. Make sure the 
transfer belt cleaner is free to move 
slightly upwards (rotating slightly around 
the...

Troubleshooting and routine maintenance
C - 39
C
Replacing the transfer roller
1Turn off the machine’s power switch.
2Open the back cover of the machine.
3Release the transfer roller lock levers on 
the right and left-hand sides, and then lift 
the levers to release the transfer roller.
4Take out the transfer roller by gently 
pulling the right-hand side up and sliding 
the transfer roller to the right.
5Put in the new transfer roller by holding 
the lock levers of the transfer roller and 
adjusting the...

Chapter C
C - 40
Machine Information
Checking the Serial Numbers
You can view the machine’s serial number on 
the LCD.
1Press Menu/Set, 7, 1.
2Press Stop/Exit.
Checking the Page Counters
You can view the machine’s page counters 
for copies, printed pages, reports and lists, 
faxes or a summary total.
1Press Menu/Set, 7, 2.
2Press ▲ or ▼ to select Total, Copy, 
Print or List/Fax.
3Press Stop/Exit.
Checking remaining life of 
parts
You can view the remaining life of these parts 
on the LCD.
1Press...

Troubleshooting and routine maintenanceC - 41
C
Packing and shipping 
the machine
When you transport the machine, use the 
packing materials that came with your 
machine. If you do not pack the machine 
properly, you could void your warranty. The 
machine should be adequately insured with 
the carrier.
Note
If you are missing the original repacking kit 
that came with your machine, please call 
800-284-4329 BEFORE REPACKING FOR 
SHIPMENT.
1Turn off the machine’s power switch.
2Unplug first the telephone...

Chapter C
C - 42
6Open the front cover of the machine. 
Pull out all the toner cartridges and the 
waste toner pack from the machine.
7To avoid any toner spills, plug the waste 
toner hole located at the bottom right 
inside of the machine with the supplied 
protective sponge.
8Remove the tape from the supplied 
protective sponge and cover the 
opening of the waste toner pack as 
shown in the illustration.
9Put the waste toner pack back into the 
machine.
0Close the front cover, inside cover and 
scanner...

Troubleshooting and routine maintenance
C - 43
C
CTwo people should put the machine into 
the plastic bag, and then put the 
machine into the original carton.
DPut the two Styrofoam pieces on top of 
the machine and then put the accessory 
box on top of the Styrofoam.
EClose the carton and tape it shut.
FLift the carton with two people and put it 
into the outer carton. Put a cushion in 
each of the four corners.
GClose the outer carton and tape it shut.
LOCK
 

D - 1
D
Optional accessories
Lower tray unit (LT-27CL)
See Lower tray unit (LT-27CL) on page D-1.
SO-DIMM memory
See SO-DIMM (Memory) on page D-3.
Lower tray unit (LT-27CL)
The lower tray unit (Tray 2) is an optional 
device that can hold up to 530 sheets of extra 
paper (20 lb (80 g/m
2)). You can put Letter, 
A4, B5 (JIS and ISO) or Executive size 
(176 x 250 to 215.9 x 297 mm) paper in this 
tray.
How to install the lower tray unit
1Turn off the machines power switch. 
Then, unplug the telephone line...

Optional accessories
D - 2
D
5Remove the protective parts and then 
put the paper tray back in the lower tray 
unit.
6Check the two alignment pins on the 
lower tray unit. Use two people to lift the 
machine and place it on top of the lower 
tray unit. Make sure you use the 
handholds at the bottom four corners of 
the machine. Check that the pins are 
properly inserted into the machine. 
Check that the connector is inserted.
7Install the two stopper fittings on the 
right and left hand sides of the...