Error and Maintenance Messages

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DCP‑B7500D / DCP‑B7520DW / DCP‑B7530DN / DCP‑B7535DW / MFC‑B7700D / MFC‑B7720DN

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Home > Troubleshooting > Error and Maintenance Messages

FAQs, Manuals & More

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.

You can correct most errors and perform routine maintenance by yourself. If you need more tips: Visit us at support.brother.com, and click FAQs & Troubleshooting.

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.
2-sided Disabled	The 2-sided tray is not installed completely.	Install the 2-sided tray firmly in the machine.
Cartridge Error Put the Black (BK) Toner Cartridge back in. Put the Toner Cartridge back in.	The toner cartridge is not installed correctly.	Pull out the drum unit and toner cartridge assembly, take out the toner cartridge, and put it back in the drum unit again. Put the drum unit and toner cartridge assembly back in the machine. If the problem continues, contact Brother customer service or your local Brother dealer.
Comm.Error	Poor telephone line quality caused a communication error.	Send the fax again or connect the machine to another telephone line. If the problem continues, contact the telephone company and ask them to check your telephone line.
Cover is Open.	The front cover is not completely closed.	Open and then firmly close the front cover of the machine.
	The fuser cover is not completely closed or paper was jammed in the back of the machine when you turned on the power.	Close the fuser cover located inside the back cover of the machine.
	The ADF cover is not completely closed.	Close the ADF cover. If the error message remains, press Stop/Exit.
Disconnected	The other person or other person's fax machine stopped the call.	Try to send or receive again. If calls are stopped repeatedly and you are using a VoIP (Voice over IP) system, try changing the Compatibility to Basic (for VoIP).
Document Jam	The document was not inserted or fed correctly, or the document scanned from the ADF was too long.	Remove the jammed paper from the ADF unit. Clear any debris or scraps of paper from the ADF unit paper path. Press Stop/Exit.
Drum !/Slide the Green tab on Drum Unit.	The corona wire on the drum unit must be cleaned.	Clean the corona wire on the drum unit.
Drum !/Slide the Green tab on Drum Unit.	The drum unit or the toner cartridge and drum unit assembly is not installed correctly.	Put the toner cartridge in the drum unit. Then reinstall the toner cartridge and drum unit assembly in the machine.
Drum End Soon	The drum unit is near the end of its life.	Order a new drum unit before you get the Replace Drum message.
Jam 2-sided	The paper is jammed in the 2-sided paper tray.	Pull the paper tray and the 2-sided tray out completely, open the back cover and then remove all jammed paper. Close the back cover, and put the paper tray and the 2-sided tray firmly back in the machine.
Jam Inside	The paper is jammed inside the machine.	Open the front cover and remove the toner cartridge and drum unit assembly. Pull out all jammed paper. Close the front cover. If the error message remains, press Start.
Jam Rear	The paper is jammed in the back of the machine.	Open the fuser cover and remove all jammed paper. Close the fuser cover. If the error message remains, press Start.
Jam Tray	The paper is jammed in the indicated paper tray.	Pull the paper tray out completely and remove all jammed paper. Put the paper tray firmly back in the machine.
Manual Feed	Manual was selected as the paper source in the printer driver, but there is no paper in the manual feed slot.	Place paper in the manual feed slot.
No Caller ID	There is no incoming call history. You did not receive calls or you have not subscribed to the Caller ID service from your telephone company.	If you want to use the Caller ID feature, call your telephone company.
No Paper	The machine is out of paper, or paper is not loaded correctly in the paper tray.	Refill paper in the paper tray. Make sure the paper guides are set to the correct size. If paper is in the tray, remove it and load it again. Make sure the paper guides are set to the correct size. Do not overfill the paper tray.
No Response/Busy	The number you dialed does not answer or is busy.	Verify the number and try again.
No Toner	The toner cartridge or the toner cartridge and drum unit assembly is not installed correctly.	Remove the toner cartridge and drum unit assembly. Remove the toner cartridge from the drum unit, and reinstall the toner cartridge back in the drum unit. Reinstall the toner cartridge and drum unit assembly back in the machine. If the problem continues, replace the toner cartridge with a new one.
Out of Memory	The machine's memory is full.	If a fax-sending or copy operation is in process Do one of the following: Press Start to send or copy the scanned pages. Press Stop/Exit and wait until the other operations in progress finish, and then try again. Print the faxes that are in the memory. Clear the data in the memory. To gain extra memory, you can turn off Fax Storage. If a print operation is in process Do one of the following: Reduce the Resolution. Clear faxes from the memory.
Print Unable XX	The machine has a mechanical problem.	(MFC-B7700D) To prevent you from losing the received fax data in the machine's memory, transfer the data to another Fax machine or to your computer before turning off the machine. Press and hold to turn the machine off, wait a few minutes, and then turn it on again. If the problem continues, contact Brother customer service.
Replace Drum	It is time to replace the drum unit.	Replace the drum unit.
Replace Toner	The toner cartridge is at the end of its life. The machine stops all print operations. While memory is available, faxes are stored in the memory.	Replace the toner cartridge with a new one.
Scan Unable XX	The machine has a mechanical problem.	(MFC-B7700D) To prevent you from losing the received fax data in the machine's memory, transfer the data to another Fax machine or to your computer before turning off the machine. Press and hold to turn the machine off, and then turn it on again. If the problem continues, contact Brother customer service.
Self-Diagnostic/Turn the power off, then on again. Leave the machine for 15 min.	The temperature of the fuser unit does not rise to a specified temperature within the specified time.	(MFC-B7700D) To prevent you from losing the received fax data in the machine's memory, transfer the data to another Fax machine or to your computer before turning off the machine. Press and hold to turn the machine off, wait a few seconds, and then turn it on again. Leave the machine idle for 15 minutes with the power on.
	The fuser unit is too hot.
Size Error DX	The paper size specified in the printer driver and the machine's paper size setting are not available for automatic 2-sided printing.	Press Stop/Exit. Choose a paper size supported by 2-sided printing. Paper size available for automatic 2-sided printing is A4.
Size Error DX	The paper in the tray is not the correct size and is not available for automatic 2-sided printing.	Load the correct size of paper in the tray and set the tray for that paper size. Paper size available for automatic 2-sided printing is A4.
Size mismatch Reload correct paper.	The paper in the tray is not the correct size.	Load the correct size of paper in the tray and set the size of paper to the tray.
Toner Low	If the LCD displays this message, you can still print. The toner cartridge is near the end of its life.	Order a new toner cartridge now so a replacement toner cartridge is available when the LCD displays Replace Toner.
Wait for a while	The temperature of the inside of the machine is too hot. The machine will pause its current print job and go into cooling down mode. During the cooling down mode, you will hear the cooling fan running while the LCD displays Wait for a while.	Wait until the machine has finished cooling down. Make sure all vents on the machine are clear of obstructions. When the machine has cooled down, the machine will resume printing. If the fan is not spinning, disconnect the machine from the power for several minutes, then reconnect it.

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