Lexmark CX725
Open the ADF top cover, and then locate the sensors.
A
Sensor (ADF pick)
B
Sensor (ADF trail)
C
Sensor (ADF media present)
D
Sensor (ADF top door interlock)
Close the ADF top cover, and then open the ADF.
Locate the sensor (ADF closed) (E).
Close the ADF, remove the ADF tray, and then open the ADF top cover.
Insert a folded sheet of paper to toggle the sensor (ADF duplex).
Insert a folded sheet of paper as shown to toggle the sensor (ADF input 1st scan).
Prevent scanning issues from arising. Change the ADF scan pad to maintain proper scanning performance.
Prevent paper feed and jam problems in your ADF from happening again. Replace the ADF input tray the fastest way with these steps.