Brother FAX 1840C - Manual (Page 169)

12 - 25 TROUBLESHOOTING AND ROUTINE MAINTENANCE
Replacing the ink cartridges
Your machine is equipped with an ink dot counter that automatically
monitors the ink level in each color cartridge. When the counter
detects an ink cartridge is running out of ink, the machine will notify
you with a message on the LCD.
The LCD shows you which color cartridges are low or empty. Be sure
to follow the LCD prompts so you replace the color cartridges in the
appropriate order.
1
Close the document support and the document tray.
2
Lift the top cover to the open position until it locks securely into
place.
If one or more ink cartridges are empty, for example Black, the
LCD shows
Ink Empty Black and Open Cover .
3
Pull the ink cartridge hook toward you and remove the ink
cartridge for the color shown on the LCD.
4
Open the new ink cartridge bag for the color shown on the LCD,
and then take out the ink cartridge.
Ink Cartridge Hook