Brother HL-5440D - Manual (Page 101)

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Routine Maintenance
5
Note
• The Toner LED will blink continuously if the toner is low.
• If the printout is faint, hold the drum unit and toner cartridge assembly level with both hands and gently
shake it from side to side several times to spread the toner evenly inside the cartridge.
Replace Toner
5
The machine will stop printing until you replace the toner cartridge.
A new genuine Brother toner cartridge will reset the Replace Toner mode.