Brother MFC 9420CN User Manual

Chapter C
C - 26
Replacing the consumable items
You will need to replace the following consumable items regularly. When the time comes to 
replace consumable items, the following messages will appear on the LCD.
The machine will stop printing when the following maintenance messages appear on the LCD.
The following are maintenance messages that appear on the LCD in the Ready mode. These 
messages provide advanced warnings to replace the consumable items before they run out. To 
avoid any inconvenience,...

Troubleshooting and routine maintenance
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C
The following are maintenance messages that appear alternatively with the normal message on 
the upper row of the LCD when the machine is in the Ready mode. These messages advise you 
that you will need to replace each of the consumable items as soon as possible, since the 
consumable item’s end of life has been reached. The machine will continue printing when any of 
these messages appear on the LCD.
1Definition of pages: actual output page number....

Chapter C
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Note
■Discard the used consumable item according to local regulations, keeping it separate from 
domestic waste. If you have questions, call your local waste disposal office. Be sure to re-seal 
the consumable item tightly so that the material inside does not spill. 
■We recommend placing used consumable items on a piece of paper or cloth to prevent 
accidentally spilling or scattering the material inside.
■If you use paper that is not a direct equivalent for the recommended paper, the...

Troubleshooting and routine maintenanceC - 29
C
Toner empty message
When the following message appears on the 
LCD and the machine stops printing, you 
need to replace the toner cartridge.
Replacing a toner cartridge
The toner cartridge can print approx. 10,000 
pages for Black, 6,600 pages for Cyan, 
Magenta and Yellow. When the toner 
cartridge is running low, the LCD show the 
below message. X shows the toner color that 
is nearly empty. (C = Cyan,  M = Magenta, 
Y  = Yellow,  K = Black) When the...

Chapter C
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How to replace a toner cartridge
1Open the front cover of the machine.
2Pull out the used toner cartridge.
3Take the new toner cartridge out of the 
box. 
Note
■Discard the used toner cartridge 
according to local regulations, keeping it 
separate from domestic waste. 
■Be sure to seal the toner cartridge tightly 
so toner powder does not spill out of the 
cartridge. If you have questions, call your 
local waste disposal office. 
4Hold the cartridge level with both hands 
and gently rock...

Troubleshooting and routine maintenance
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C
5Put in the new toner cartridge by 
positioning it in the guide. Slide it gently 
into the machine. Do not try to push or 
lock the new toner cartridge in; it must 
rest loosely in the guide rails and will 
automatically be positioned properly 
when the front cover is closed. Note that 
each color cartridge is individually keyed 
to prevent improper installation. Match 
each cartridge color label to the same 
color label on the machine.
6Close the front...

Chapter C
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Replacing the waste toner pack
1Open the front cover of the machine.
2Remove the waste toner pack from the 
holder at the lower right hand side of the 
machine. Be careful not to spill the 
toner.
3Take the cap off the new waste toner 
pack, and put the cap on the used waste 
toner pack.
Note
■When you discard the used waste toner 
pack, place it in the plastic bag included 
with the replacement waste toner pack.
■Discard the used waste toner pack 
according to local regulations, keeping...

Troubleshooting and routine maintenance
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C
OPC belt cartridge
Replace OPC belt cartridge message
When the OPC belt cartridge runs out, the 
following message appears on the LCD. 
When you see this message, you must 
replace the OPC belt cartridge:
Replacing the OPC belt cartridge 
(OP-4CL)
1Turn off the machine’s power switch.
2Open the scanner unit.
3Open the inside cover so that it latches 
under the scanner unit.
4To release the lock, push the green belt 
cartridge lock levers on both sides...

Chapter C
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7Remove the protective sheet from the 
new OPC belt cartridge. Do not touch 
the green part of the OPC belt cartridge.
8Put the new OPC belt cartridge into the 
machine guides with the flat side facing 
you.
9To lock the cartridge into the machine, 
push the belt cartridge lock levers that 
are on both sides of the OPC belt 
cartridge outwards.
0Close the inside cover, and then close 
the scanner unit.
ATurn the machine’s power switch back 
on.
Reset the OPC belt life counter
1Press...

Troubleshooting and routine maintenance
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C
Fusing unit
Replace fusing unit message
When the following message appears on the 
LCD, you must replace the fusing unit.
Replacing the fusing unit
1Turn off the machine’s power switch. To 
avoid injury, wait until the machine has 
cooled down sufficiently before you 
replace the fusing unit.
2Open the back cover (1) and the 
scanner unit (2) of the machine.
3To release the fusing unit from the 
machine, release the lock levers that are 
on both sides of...