Brother Hl 5350dnlt User Manual

Routine Maintenance
101
6
Drum unit6
A new drum unit can print approximately 25,000 A4 or Letter size single-sided pages at 1 per/ job.
Note • There are many factors that determine the actual drum life, such as the temperature, humidity, type of 
paper, type of toner used and so on. Under ideal conditions, the average drum life is estimated at 
approximately 25,000 pages. The actual number of pages that your drum will print may be significantly 
less than this estimate. Because we have no control over...

Routine Maintenance
102
6
Replacing the drum unit6
IMPORTANT
 
While removing the drum unit, handle it carefully because it may contain toner.
 
Every time you replace the drum unit, clean the inside of the printer.See Cleaning on page 106.
 
When you replace the drum unit with a new one, you need to reset the drum counter by completing the 
following steps:
aPress the front cover release button and then open the front cover.
bTake out the drum unit and toner cartridge assembly.
 

Routine Maintenance
103
6
IMPORTANT
 
We recommend that you put the drum unit and toner cartridge assembly on a piece of disposable paper or 
cloth in case you accidentally spill or scatter toner.
 To prevent damage to the printer caused by static electricity, DO NOT touch the electrodes shown in the 
illustration.
 
cPush down the blue lock lever and take the toner cartridge out of the drum unit.
WARNING 
DO NOT put a toner cartridge into a fire. It could explode, resulting in injuries.
 Use neutral...

Routine Maintenance
104
6
IMPORTANT
 
Handle the toner cartridges carefully. If toner scatters on your hands or clothes, wipe or wash it off with cold 
water at once.
 To avoid print quality problems, DO NOT touch the shaded parts shown in the illustrations.
 
dUnpack the new drum unit.
IMPORTANT
 
Wait to unpack a drum unit until immediately before you put it in the printer. Exposure to direct sunlight or 
room light may damage the drum unit.
 
ePut the toner cartridge firmly into the new drum unit...

Routine Maintenance
105
6
fPut the drum unit and toner cartridge assembly back in the printer.
gPress and hold down the Go for about 4 seconds until all the LEDs light up. Once all four LEDs are lit, 
release Go.
IMPORTANT
 
Do not reset the drum counter when you only replace the toner cartridge.
 
hClose the front cover.
iMake sure that the Drum LED is now off.
 

Routine Maintenance
106
6
Cleaning6
Clean the outside and inside of the printer regularly with a dry, lint-free cloth. When you replace the toner 
cartridge or the drum unit, make sure that you clean the inside of the printer. If printed pages are stained with 
toner, clean the inside of the printer with a dry, lint-free cloth.
Cleaning the outside of the printer6
WARNING 
Use neutral detergents. Cleaning with volatile liquids such as thinner or benzine will damage the surface of 
the printer.
 
DO NOT...

Routine Maintenance
107
6
cWipe the outside of the printer with a dry, lint-free cloth to remove dust.
dRemove anything that is stuck inside the paper tray.
eWipe the inside of the paper tray with a dry, lint-free cloth to remove dust.
fPut the paper tray back in the printer.
gPlug the printer back in, and then turn on the power switch.
 

Routine Maintenance
108
6
Cleaning the inside of the printer6
aTurn off the printer power switch and then unplug the printer.
bPress the front cover release button and then open the front cover.
 

Routine Maintenance
109
6
cTake out the drum unit and toner cartridge assembly.
CAUTION 
After you have just used the printer, some internal parts of the printer will be extremely hot. Wait for the 
printer to cool down before you touch the internal parts of the printer.
 
IMPORTANT
 
We recommend that you put the drum unit and toner cartridge assembly on a piece of disposable paper or 
cloth in case you accidentally spill or scatter toner.
 Handle the toner cartridge carefully. If toner scatters on your...

Routine Maintenance
110
6
dWipe the scanner window with a dry, lint-free cloth.
ePut the drum unit and toner cartridge assembly back in the printer.
fClose the front cover.
gPlug the printer back in, and then turn on the power switch.