- HP All-in-One Printer Manual

Q2431-90912 Chapter 5 Theory of operation 105
Stacker jam detection
The stacker uses the following sensors to detect the presence of media and to verify whether the
media is feeding correctly or is jamming. For information about the location of these sensors, see
“Stacker and stapler/stacker switches and sensors” on page 345.
● Paper inlet sensor (PS1101)
● Paper delivery sensor (PS102)
Stacker feed jam
If the paper inlet sensor (PS1101) does not detect the leading edge of the media within a specific
time after the stacker driver has received the paper delivery signal, the DC controller PCA
determines that a stacker feed delay jam has occurred.
The transport process stops and a 13.XX.YY JAM message appears on the control-panel
display. For more information about jam messages, see “Alphabetical printer messages” on
page 258 and “Numerical printer messages” on page 274.
Stacker feed stationary jam
If the paper inlet sensor (PS1101) does not detect the trailing edge of the media within a specific
time after the paper inlet sensor (PS1101) detected the leading edge of the media, the DC
controller PCA determines that a stacker feed delay jam has occurred.
The transport process stops and a 13.XX.YY JAM message appears on the control-panel
display. For more information about jam messages, see “Alphabetical printer messages” on
page 258 and “Numerical printer messages” on page 274.
Stacker residual media jam
If the paper inlet sensor (PS1101) or the paper delivery sensor (PS1102) detects media during
the initial drive period, the DC controller PCA determines that a stacker feed delay jam has
occurred.
The transport process stops and a 13.XX.YY JAM message appears on the control-panel
display. For more information about jam messages, see “Alphabetical printer messages” on
page 258 and “Numerical printer messages” on page 274.
Note This jam only occurs if the paper delivery sensor (PS1102) detects media at the start of the initial
drive.