Lexmark Optra N 4040 Service Manual page 229

4040
PS31: Registration paper sensor
PS32: Paper jam sensor
PS33: Tray paper-out sensor
PS34: Paper surface sensor
SW31: Lifter abnormal position sensing switch
SW601: Paper-level sensing switch
SW602: Paper-level sensing switch
SW701: Paper-size sensing switch
SW702: Paper-size sensing switch
SW703: Paper-size sensing switch
Sw704: Paper-size sensing switch
Locations 5-13