Lexmark E250D - E B/W Laser Printer Service Manual page 131

Paper input and duplex sensor removal
1.
Remove the duplex unit. See
2.
Remove screws (A) holding the two sensors.
3.
Remove the sensor assembly.
Note: Be sure to secure cables in retainers when installing the new assembly. The solenoid cable should be
installed on top of the sensor cables.
"Duplex removal" on page 4-18.
Repair information
4512-220, -230
4-39