Lexmark C78x Service Manual page 159

Stapled sheets are not transported to the output tray
Replace the stapler option.
POST incomplete—Insert Stapler Cartridge displays (cartridge holder is installed and
cannot clear message)
When this failure occurs, the following may also occur in the order shown:
•
Insert Staple Cartridge displayed.
The stapler assembly may cycle or fire a few times.
•
282.xx Stapler Jam displayed.
The stapler assembly may try to cycle or fire.
•
990.01 Service displayed.
Step Actions and questions
1 Remove the stapler cartridge holder from the stapler
assembly. If the holder is jammed in the stapler
assembly:
1. Turn the printer off, and remove the right side
cover. Use care when removing the cover, as the
right side door switch and cable assembly are
easily damaged. Do not allow the right side cover to
hang by the switch and cable assembly.
2. Disconnect the 10-pin cable from the stapler
assembly.
3. Hold the stapler assembly with one hand while
removing the three screws from the assembly. The
assembly is heavy and easy to drop.
4. Check the stapler assembly for damaged or broken
parts. Check the flag and spring assembly on the
front of the stapler assembly to see if the flag or
spring are broken or missing.
Is the flag or spring broken or missing?
2 Carefully cycle the large gear on the side of the stapler
assembly, and try to free the cartridge holder
assembly. Note: Look for staples jammed at the throat
of the cartridge holder, and remove any that are found.
Gently try to remove the cartridge holder from the
stapler assembly. It may be necessary to manually
cycle the large gear on the side of the stapler assembly
to release the cartridge holder.
Reinstall the stapler assembly with a new stapler
cartridge holder and staples.
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.
Run the Finisher Feed Test to check the option. See
"Finisher Feed Test" on page
Does the problem persist?
3 Stapler to stapler board (J3) cable—Check the
continuity of the cable.
Is there continuity?
3-23.
Yes No
Replace the Go to step 2
broken or
missing flag or
spring.
Go to step 3 Problem resolved
Replace the Replace the
staple option. stapler board
cable (J3).
Diagnostic information
5061
2-115