Lexmark C78x Service Manual page 158

5061
Close Finisher Side Door
Step Actions and questions
1 Side cover door—Check the stapler access door for
any signs of damage or broken parts. Make sure the
door correctly actuates the stapler side access door
switch. If this does not fix the problem, replace the
stapler option.
Does the side cover door actuate the switch when it
closes?
Paper feeds into finisher option output tray—Paper is not stapled—Paper does not
align with the right side
Replace the stapler option.
Misalignment of sheets to be stapled
Step Actions and questions
1 Left side bail assembly—Check the left side bail
assembly for any signs of binding, missing, or broken
parts.
Are there binding, missing, or broken parts to the left
side bail assembly?
2 Stapler gearbox assembly—Check the stapler gearbox
assembly for correct operation.
Does the stapler gearbox assembly operate correctly?
Sheets are transported into output tray but not stapled
Replace the stapler option.
2-114
Service Manual
displayed—unable to clear or reset message (POST incomplete)
Yes No
Replace the Replace the
stapler option. stapler access
door switch
assembly.
Yes No
Fix or replace the Go to step 2
binding, missing,
or broken parts.
Replace the Replace the
staple option. stapler assembly.
Note: When
replacing the
stapler assembly,
observe the
location of the
ground lead from
the stapler
assembly and the
finisher frame,
and make sure
the ground lead
is correctly
reattached.