Kyocera TASKalfa 2551ci Service Manual page 319

Code
9500 DP switchback sensor non
arrival jam
9600 DP eject sensor non arrival
jam
9610 DP eject sensor stay jam
*: Refer to figure 1-4-1 for paper jam location (see page 1-4-1).
Contents
DP switchback sensor (DPSBS) does not turn on
within specified time of DP timing sensor (DPTS)
turning on.
DP eject sensor (DPES) does not turn on within
specified time of DP timing sensor (DPTS) turning
on.
DP eject sensor (DPES) does not turn off within
specified time of DP timing sensor (DPTS) turning
off.
Conditions
1-4-12
2NP
Jam
location*
G
G
G