Upper Level / Lower Level Paper Empty Sensor (Pes1 / Pes2; Cut Sheet Feed Sensor (Pfs), Paper Register Sensor - Printronix L5000 Series Maintenance Manual

Upper level / lower level paper empty sensor (PES1 / PES2)

These sensors are photo–interrupters. When the paper in the paper supply cassette
runs out, the lever lowers and blocks the light between the light emitters and
receptors, causing detection of no paper.

Cut sheet feed sensor (PFS), paper register sensor

These sensors are photo–interrupters located partway in the paper transport path.
When paper passes through this location, the levers are pushed over, blocking light
between the light emitters and receptors, causing detection of paper in that location.
(no paper exists)
Optional Cut Sheet Feeder
(paper exists)
D–13