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 unit. Do not put pressure on the 
fusing unit; it should go in easily. If it does 
not, make sure the fusing unit connector is 
free to move. 
Do not apply force! It could damage both 
the fusing unit and the machine.
Fusing Unit
1.Reset 2.Exit
CAUTION
Both ends of the transfer belt cleaner roller 
consist of metal bearings that connect the 
bias element to the power supply. These 
must be connected properly when you 
install the transfer belt cleaner. Be sure to 
check how to connect them properly by 
looking at the old transfer belt cleaner 
before you begin replacement.
 
						

							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 bearings) in the housing after you 
have installed it.
8Put the transfer belt cleaner cover back 
in, and then close the top cover.
9Close the inside cover, and then close 
the scanner unit.
0Turn the machine’s power switch back 
on.
 
						

							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 angle of the transfer roller 
lever shafts (both sides) to match the 
transfer unit grooves. Put the transfer 
roller onto the shafts and place the roller 
onto the springs as shown below:
6Push the lock levers down to lock the 
transfer roller into place.
7Close the back cover.
8Turn the machine’s power switch back 
on.
Lock levers
Transfer roller shaft
Spring
 
						

							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 Menu/Set, 7, 3.
2Press ▲ or ▼ to select 
1.OPC Belt Life, 2.Fuser Life, 
3.120K Kit Life or 
4.PF KIT2 Life.
Press Menu/Set.
3Press Stop/Exit.
Note
The life check of a part will be accurate only if 
you have reset that part’s life counter when 
you installed a new part. 
It will not be accurate if you have reset that 
part’s life counter during the life of a used 
part.
Serial No.
XXXXXXXXX
Machine Info.
2.Page Counter
Page Counter
Total    :XXXXXX
Page Counter
Copy     :XXXXXX
Page Counter
Print    :XXXXXX
Page Counter
List/Fax :XXXXXX
OPC Belt Life
Remaining:XXX%
 
						

							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 line cord from 
the telephone wall jack, then any 
interface cables, and then unplug the 
power cord from the AC power outlet. 
3Open the scanner unit and the inside 
cover of the machine so that it latches 
under the scanner unit.
4Push both green OPC belt cartridge lock 
levers inwards.
5Remove the OPC belt cartridge from the 
machine, place it in the original plastic 
bag.
 
						

							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 unit.
AAttach an original orange protective 
cover to each of the toner cartridges and 
secure it with tape. Put each toner 
cartridge in a separate plastic bag.
BPut the toner cartridges and the OPC 
belt cartridge into the accessory box, 
and then close it.
 
						

							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 cord 
from the telephone wall jack.
2Unplug the power cord from the AC 
power outlet. Disconnect the interface 
cable from the machine.
3Place the lower tray unit on a flat table, 
and then remove the protective parts.
4Remove the paper tray from the lower 
tray unit.
Optional accessories
WARNING
■This machine is heavy and weighs 
approximately 76.7 lb (34.8 kg). To 
prevent injuries, use at least two 
people to lift the machine.
■When you lift the machine make sure 
you use the handholds at the bottom 
four corners of the machine.
■When placing the machine on top of 
the lower tray unit, be careful not to 
catch your fingers between them.
■Do not carry the machine when the 
lower tray unit is attached.
CAUTION
When moving or lifting this machine, keep 
the machine flat. To avoid spills, you must 
first remove the toner cartridges and waste 
toner pack.
 
						

							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 lower tray 
unit.
8Cover the gap on the right hand side 
with the right-hand side cover by first 
inserting the hook at the back. Cover the 
gap on the left hand side with the 
left-hand side cover by first inserting the 
hook at the back.
Close both of the side covers by putting 
the notch over the hook of the lower tray 
unit.
9To level the machine, adjust the feet of 
the lower tray unit at the front and back 
on the right-hand side. Turn the feet to 
move them up or down until they touch 
the work surface and the tray unit is 
level.
Turn the lock screw on each foot to 
secure it.