Lexmark X642e Service Manual page 166

7002-xxx
displays
231.xx Jam
FRU
1 Fuser exit sensor
2 Duplex input sensor
displays
232.xx Jam
FRU
1 Duplex input sensor
displays
233.xx Jam
FRU
1 Duplex double feed sensor
2-128
Service Manual
Action
Check the sheet of media is leaving the exit sensor in the fuser and
feeding properly into the duplex option. Check the duplex link for
correct operation and any signs of damage. If the problem is prior to
the duplex input sensor and in the base machine, repair as
necessary. If the jam occurs in the duplex option prior to the duplex
input sensor, go to step 2.
If the paper does not reach the duplex input sensor, make sure the
sensor is connected to the duplex system board. If correct, check for
any paper or other objects that might cause a paper jam. If none are
found, replace the duplex option assembly.
Action
If the paper reaches the duplex input sensor, but does not clear the
sensor, make sure the sensor is connected to the duplex system
board. If connected correctly, check for correct operation of the
sensor. If a problem is found and cannot be corrected, replace the
duplex option assembly. If no problem is found, check for a piece of
paper or other object in the paper path that might cause a paper jam
over the input sensor. If no problem is found, replace the duplex
option assembly.
Action
If a sheet of paper fails to reach the double feed sensor during
turnaround, check for any signs of paper or other objects that might
cause the paper to jam. If no problem is found, replace the duplex
option assembly.