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Home > Troubleshooting > Error and Maintenance Messages
Error and Maintenance Messages
• MFC-L3770CDW
If the LCD displays errors and your Android
™
device supports the NFC feature, touch your device to the
NFC symbol on your Brother machine to access the Brother Solutions Center and browse the latest
FAQs from your device. (Your mobile telephone provider's message and data rates may apply.)
Make sure the NFC settings of both your Brother machine and your Android
™
device are set to On.
As with any sophisticated office product, errors may occur and supply items may have to be replaced. If this
happens, your machine identifies the error or required routine maintenance and shows the appropriate message.
The most common error and maintenance messages are shown in the table.
Follow the instructions in the Action column to solve the error and remove the message.
You can correct most errors and perform routine maintenance by yourself. If you need more tips: Visit
support.brother.com, and click the FAQs & Troubleshooting page.
>> HL-L3290CDW/DCP-L3551CDW
>> MFC-L3710CW/MFC-L3750CDW/MFC-L3770CDW
HL-L3290CDW/DCP-L3551CDW
Error Message
Cause Action
2-sided Disabled
The back cover of the machine is not
closed completely.
Close the back cover of the machine
until it locks in the closed position.
Access Denied
The function you want to use is
restricted by Secure Function Lock
3.0.
Ask your administrator to check your
Secure Function Lock Settings.
Belt End Soon
The belt unit is near the end of its life. Order a new belt unit before the LCD
displays Replace Belt.
Calibrate
Calibration failed.
• Press and hold down to turn
off the machine. Wait a few
seconds, and then turn it on again.
Perform the color calibration again
using the LCD.
• Install a new belt unit.
• If the problem continues, contact
Brother Customer Service or your
local Brother dealer.
Cartridge Error
The toner cartridge is not installed
correctly.
Remove the toner cartridge and drum
unit assembly for the color that is
indicated on the LCD. Take out the
toner cartridge, and put it back into
the drum unit again. Re-install the
toner cartridge and drum unit
assembly back in the machine.
If the problem continues, contact
Brother Customer Service or your
local Brother dealer.
Condensation
Condensation may have formed
inside the machine after a room
temperature change.
Leave the machine turned on. Wait
for 30 minutes with the top cover in
the open position. Then turn off the
machine and close the cover. Turn it
on again.
Cooling Down
The temperature of the inside of the
machine is too hot. The machine
Wait until the machine has finished
cooling down. Make sure all vents on
the machine are clear of obstructions.
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