Lexmark MB790MFP Service Manual page 71

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7462
Error
code or
message
239.01
External duplex
assembly error
Source = External
duplex
239.02
External duplex
assembly error
Source = External
duplex
239.03
Device controls
response error.
Source = External
duplex
2-34
Service Manual
Error contents
Mechanical feed error or timing
error.
Mechanical feed error or timing
error.
Mechanical feed error or timing
error.
Description/Action
Possible repair actions
1. Remove all media present
in media path.
2. Check media for proper
installation.
3. Check for obstructions in
media path.
4. Ensure the external duplex
assembly is properly
installed.
5. Ensure the rear door of the
external duplex is fully
closed.
6. Check all connections on
the external duplex
assembly.
7. Replace the external
duplex assembly if problem
remains.
1. Remove all media present
in media path.
2. Check media for proper
installation.
3. Check for obstructions in
media path.
4. Ensure the external duplex
assembly is properly
installed.
5. Ensure the rear door of the
external duplex is fully
closed.
6. Check all connections on
the external duplex
assembly.
7. Replace the external
duplex assembly if problem
remains.
1. Remove all media present
in media path.
2. Check media for proper
installation.
3. Check for obstructions in
media path.
4. Ensure the external duplex
assembly is properly
installed.
5. Ensure the rear door of the
external duplex is fully
closed.
6. Check all connections on
the external duplex
assembly.
7. Replace the external
duplex assembly if problem
remains.
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