“Toner Sensor Error” (Error: 540, 541, 542, 543)

Note

• The fuser unit is extremely hot.
• Do not touch it.
• Use extra care when handling the image drum (the green cylinder), because it is fragile.
• Do not expose the image drum to direct sunlight or strong light (About 1,500 lux or above).
• Do not leave it for more than 5 minutes even under room lighting.