Lexmark CX725
Remove the waste toner bottle.
Remove the motor cover. See Motor cover removal.
Remove the scanner rear left cover. See Scanner rear left cover removal.
Remove the right cover. See Right cover removal.
Remove the screw (A), disconnect the cable (B), and then remove the sensor.
Additional requirements for Educational station issues
Lexmark CS/X72x and C/XC41xx: Print Quality Diagnosis ? Light Print on Printed Page Colors