HP 3150 EN - Manual (Page 81)

EN Printer feed system 79
Paper jam detection
The paper out sensor (PS202), paper registration sensor (PS203),
and the paper exit sensor (PS201) detect paper moving through the
HP LaserJet 3100/3150 product. If a paper jam is detected, the ECU
immediately stops the printing process and displays a paper jam
message on the control panel.
A paper jam can be detected under any of the following conditions:
● Power-on jams. Paper is present under either PS201 or PS203 at
power-on.
● Pickup jams. Paper does not reach and clear photosensor PS203
within a specified period of time. The time period begins when the
Paper Pickup Solenoid (SL1) is energized.
● Delay jams. Paper does not reach or clear a specific photosensor
within a specified period of time.