Brother Mfc 8370dn User Manual

140
Paper is jammed at the back of the 
machine
C
aUnplug the telephone line cord first, 
disconnect all cables, and then unplug 
the power cord from the electrical 
socket.
bPress the front cover release button and 
open the front cover. 
 
CAUTION 
HOT SURFACE
After you have just used the machine, some 
internal parts of the machine will be 
extremely hot. Wait at least 10 minutes for 
the machine to cool down before attempting 
to clear the paper jam.
 
cSlowly take out the drum unit and toner...

Troubleshooting and routine maintenance
141
C
hPut the drum unit and toner cartridge 
assembly back in the machine.
 
iClose the front cover.
jPlug the machine’s power cord back into 
the electrical socket first, and reconnect 
all cables and telephone line cord. Turn 
on the machine’s power switch.
Paper is jammed in the duplex trayC
aPull the duplex tray completely out of the 
machine.
 
bPull the jammed paper out of the 
machine or the duplex tray.
 
cPut the duplex tray back in the machine. 
 

142
Routine maintenanceC
WARNING 
Use neutral detergents.
  
DO NOT use any flammable substances, 
spray or organic solvent/liquids containing 
alcohol/ammonia to clean the inside or 
outside of the machine. Doing this may 
cause a fire or electrical shock. (For more 
information see Important safety 
instructions on page 103.)
 
IMPORTANT
The drum unit contains toner, so handle it 
carefully. If toner scatters on your hands 
or clothes, wipe or wash it off with cold 
water at once.
 
Cleaning the...

Troubleshooting and routine maintenance
143
C
Cleaning the scannerC
aTurn off the machine. Unplug the 
telephone line cord first, disconnect all 
cables and then unplug the power cord 
from the electrical socket.
bLift the document cover (1).
Clean the white plastic surface (2) and 
scanner glass (3) underneath it with a 
soft lint-free cloth moistened with water.
 
cIn the ADF unit, clean the white bar (1) 
and the scanner glass strip (2) 
underneath it with a soft lint-free cloth 
moistened with...

144
Cleaning the laser scanner 
windowC
WARNING 
Use neutral detergents.
  
DO NOT use any flammable substances, 
spray or organic solvent/liquids containing 
alcohol/ammonia to clean the inside or 
outside of the machine. Doing this may 
cause a fire or electrical shock. For more 
information see Important safety 
instructions on page 103.
 
IMPORTANT
DO NOT touch the laser scanner window 
with your fingers.
 
aBefore you clean the inside of the 
machine, turn off the machine. Unplug 
the telephone line...

Troubleshooting and routine maintenance
145
C
dPut the drum unit and toner cartridge 
assembly back in the machine.
 
eClose the front cover.
fPlug the machine’s power cord back into 
the electrical socket first, and then plug 
in the telephone line cord. Turn on the 
machine.
Cleaning the corona wireC
If you have print quality problems, clean the 
corona wire as follows:
aTurn off the machine. Unplug the 
telephone line cord first, disconnect all 
cables, and then unplug the power cord 
from the...

146
cClean the corona wire inside the drum 
unit by gently sliding the blue tab from 
right to left and left to right several times.
 
Note
Be sure to return the blue tab to the home 
position (a) (1). If you do not, printed 
pages may have a vertical stripe.
 
dPut the drum unit and toner cartridge 
assembly back in the machine.
 
eClose the front cover.
fPlug the machine’s power cord back into 
the electrical socket first, and then 
reconnect all cables and telephone line 
cord. Turn on the machine....

Troubleshooting and routine maintenance
147
C
cPush down the blue lock lever and take 
the toner cartridge out of the drum unit. 
 
IMPORTANT
• Handle the toner cartridge 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 below.
 
 
dPut the print sample in front of the drum 
unit, and find the exact position of the 
poor print.
 
eTurn the drum unit gear by...

148
iClose the front cover.
jPlug the machine’s power cord back into 
the electrical socket first, and then 
reconnect all cables and telephone line 
cord. Turn on the machine.
 

Troubleshooting and routine maintenance
149
C
Replacing the consumable itemsC
You will need to replace the consumable items when the machine indicates that the life of the 
consumable is over.
IMPORTANT
• We recommend placing used consumable items on a sheet of paper to prevent accidentally 
spilling or scattering the material inside.
• Be sure to reseal the consumable items tightly so that the material inside does not spill.
 
Note
• Discard used consumable items according to local regulations. (See EU...