What to do if my Brother MFC-6800 says 'CHECK DRUM UNIT'?
- MmitchellannAug 31, 2025
If your Brother All in One Printer shows 'CHECK DRUM UNIT', it means the drum unit is not installed. Reinstall the drum unit.

What to do if my Brother MFC-6800 says 'CHECK DRUM UNIT'?
If your Brother All in One Printer shows 'CHECK DRUM UNIT', it means the drum unit is not installed. Reinstall the drum unit.
How to improve transmitting quality on my Brother All in One Printer?
To improve transmitting quality on your Brother All in One Printer, try changing your resolution to FINE or SUPERFINE. Make a copy to verify the MFC’s scanner operation.
What to do if my Brother All in One Printer says 'COVER OPEN PLS CLOSE COVER'?
If your Brother All in One Printer shows 'COVER OPEN PLS CLOSE COVER', it indicates that the top cover was not completely closed. Open, then close the cover.
Why are printed pages blurred at the center or edges on my Brother MFC-6800 All in One Printer?
Certain environmental conditions such as humidity, high temperatures, etc. may cause blurred pages on your Brother All in One Printer. Make sure the MFC is placed on a flat, horizontal surface.
Why is the picture unclear when someone receives a fax from my Brother MFC-6800?
If the receiving party says the picture is not clear from your Brother All in One Printer, sometimes the resolution mode you chose when you sent your fax was not appropriate. Send the fax again, but try using the FINE or SUPERFINE mode. Also, your MFC’s scanner may be dirty, so try cleaning it.
Why do I sometimes get 'OUT OF MEMORY' when printing from Windows® on my Brother All in One Printer?
If you sometimes get the error message 'OUT OF MEMORY' when printing certain documents from Windows® on your Brother All in One Printer, turn the error recover operation on in the Setup dialog box and try again. Reduce the print resolution or reduce the complexity of your document and try again.
Why does my Brother MFC-6800 All in One Printer print a completely white page?
To resolve nothing being printed on the page from your Brother All in One Printer, make sure that the toner cartridge is not empty. Wipe the electric terminals. Make sure that a torn piece of paper does not remain on the scanner window.
Why does my Brother MFC-6800 not print?
Check the following on your Brother All in One Printer: * The MFC is turned on. * The toner cartridge and drum unit are installed properly. * The interface cable is securely connected between the MFC and computer. * Check to see if LCD is showing an error message.
What to do if my Brother All in One Printer says 'TONER EMPTY'?
If your Brother All in One Printer shows 'TONER EMPTY', it means the toner is used up and printing is not possible, or the toner cartridge is not installed into the drum unit. Replace the toner cartridge with a new one, or install the cartridge into the drum unit.
What does 'CHANGE DRUM SOON' mean on my Brother MFC-6800?
If your Brother All in One Printer shows 'CHANGE DRUM SOON', it means the drum unit is near the end of its life. Continue using the drum unit until you experience a print quality issue, then replace it with a new one.
| Functions | Print, Copy, Scan, Fax |
|---|---|
| Print Technology | Inkjet |
| Print Speed (Black) | 12 ppm |
| Print Speed (Color) | 10 ppm |
| Copy Speed | Up to 12 cpm (Black), Up to 10 cpm (Color) |
| Fax Modem Speed | 33.6 Kbps |
| Paper Capacity | 100 sheets |
| Connectivity | USB, Parallel |
| Scanner Type | Flatbed |
| Scan Resolution | 600 x 2400 dpi |
| Media Types | Envelopes |
Explains the MFC's control panel buttons and functions.
Steps for test sheet procedure and product registration.
Safety precautions for using the MFC.
Instructions for connecting power and telephone lines.
How to properly load paper into the MFC.
Overview of programming using navigation keys and LCD prompts.
Explanation of control panel keys for menu navigation.
Storing name, fax, and phone numbers for fax pages.
Enabling toner conservation to extend cartridge life.
Explains FAX ONLY, EXT.TEL/TAD, and MANUAL modes.
Feature to automatically receive faxes without pressing Fax Start.
Retrieving faxes from other machines or allowing retrieval.
Instructions for sending faxes using the ADF.
Creating custom cover pages for faxes.
Storing documents for sending at a later time.
Saving phone numbers for quick dialing.
Sending the same fax to multiple locations.
Explanation of the Distinctive Ring service.
Steps to assign a ring pattern to the MFC.
How Caller ID information is displayed and stored.
Setting up a number to forward received faxes.
Steps to access and retrieve fax messages remotely.
Overview of using the MFC for copying.
Adjusting copy size with enlargement or reduction.
Stacking or sorting multiple copies from the ADF.
Information on installing and using Windows printer drivers.
Instructions for manual duplex printing.
How to use the printer driver software.
Adjusting print resolution and toner save.
Configuring two-sided printing.
Overview of the Control Center software.
Scanning documents directly to a file.
Scanning documents as email attachments.
Introduction to document management and OCR software.
Adjusting resolution, color type, brightness, and contrast.
Previewing and cropping images before scanning.
Application for configuring MFC settings via PC.
Sending files as faxes from a PC.
Registering numbers on Speed Dial buttons.
FCC compliance statement for US models.
General safety guidelines for product usage.
Common error messages and their causes/actions.
Procedures for clearing paper jams.
Procedures for keeping the MFC in good condition.
Guide for replacing the toner cartridge.
Technical specifications for fax functions.
Technical specifications for printer functions.
System requirements for PC connectivity.











