Lexmark MB790MFP Service Manual page 111

7462
Error
code or
message
28x.70 Stapler mechanism
not in home position
x = bin
failure
number
Applies to:
StapleSmart finisher
28x.71 Deflector gate
transition to standard
x = bin
bin not detected
number
Applies to:
StapleSmart finisher
281.72 Sensor (media in
stapler) static jam
x = bin
number Applies to:
StapleSmart finisher
290.00 Sensor (ADF sheet
through) static jam
290.01 Sensor (ADF sheet
through) late jam
290.02 Sensor (ADF 1st
scan) late jam
2-74
Service Manual
Error contents
The sensor (home signal)
within the stapler assembly
detected that the stapler
mechanism was not in the
home position before stapling.
The sensor (deflector gate HP)
does not detect transition of the
deflector gate to the standard
bin.
Media remains on the sensor
(media in stapler) during the
warm up sequence.
Media remains on the sensor
(ADF sheet through) during the
warm up sequence.
The media does not reach the
sensor (ADF sheet through)
within the specified time.
The media does not reach the
sensor (ADF 1st scan) within
the specified time.
Description/Action Possible repair actions
1. Check all the connections on
the controller card and the
stapler assembly.
2. Remove the staple cartridge
and remove all jammed
staples. If the cartridge is
jammed and can not be
removed, go to step 3.
3. Remove the stapler
assembly.
Go to "MFP stapler assembly
stapler unit assembly
removal" on page 4-212.
4. Manually rotate the drive
gears and reset the stapler and
remove all jammed staples
then reinstall the stapler
assembly.
5. If problem remains, replace
the stapler assembly.
Go to "MFP stapler assembly
stapler unit assembly
removal" on page 4-212.
1. Check all the connections on
the output option controller
card.
2. Check the sensor (deflector
HP) for damage and replace if
needed.
Go to "MFP stapler assembly
sensor (deflector HP)
removal" on page 4-220.
3. Replace the output option if
problem remains.
1. Inspect the sensor (media in
stapler) for proper installation
and reinstall if needed.
2. Replace the sensor (media
in stapler)
Go to "MFP stapler assembly
sensor (media in stapler)
removal" on page 4-219.
See "Sensor (ADF sheet
through) static jam service
check" on page 2-113.
See "Sensor (ADF sheet
through) late jam service
check 290.01" on page 2-114.
See "Sensor (ADF 1st scan)
late jam service check" on
page 2-115.
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