Lexmark CX725
Note: This is not a FRU.
Open the toner door, and then remove the toner cartridges.
Remove the scanner rear right cover. See Scanner rear right cover removal.
Remove the screw (A).
Remove the two screws (B) from inside the toner compartment.
Return the toner door to the down position, and then remove the screw (C).
Remove the screw (D), and then remove the scanner tilt.
Check for obstructions that keep the scanner cover open.
Clean your scanner periodically to avoid getting blurry and faded scanned images or text.