2. Product Specifications and Description2.7.5. Shutter MechanismLaser scanning unit has the shutter[A]. As a result, toner and dust do not fall on the glass[B]of the laser optics housing.When the waste toner container is installed, it push the side of the shutter and shutter door is opened. On the contrary to this,when the waste toner is not installed, shutter door is closed.• Shutter off : Printing is impossible. Shutter door is closed. Waste toner container is not installed.• Shutter on : Printing is possible. Shutter door is opened. Waste toner container is installed.When the shutter is not on at printing, the LSU Unit Failure error will occur.2-54 Copyright© 1995-2013 SAMSUNG. All rights reserved.
