Lexmark C750 Service Manual page 157
Service manual
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Also See for C750:
- User reference manual (218 pages) ,
- Parts breakdown (65 pages) ,
- Setup manual (62 pages)
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Check Finisher displayed, unable to clear message
Step
Action and questions
1
Check for correct printer and finisher installation. Make
sure the magnetic bracket is mounted on the printer.
Is the magnetic bracket mounted on the printer?
2
Is the pin on the magnetic bracket actuating the joint
switch in the finisher?
3
Check the joint switch cable connection to CN19 on the
finisher system board.
Is the cable installed correctly?
4
Check the joint switch activating spring for any signs of
damage.
Is the switch activating spring broken?
5
Check the joint switch for correct operation. The switch
can be checked by measuring continuity while
actuating the switch.
Is the switch operating correctly?
6
Check continuity of the joint switch cable.
Is there continuity?
Finisher is totally inoperative, no motor movement, no LEDs on
This problem can be caused by a problem with the autoconnect system between the finisher and
the printer. It also can be caused by a problem with the power system in the finisher.
Step
Action and questions
1
Check the AC line cord to the finisher to make sure the
options and printer are connected properly.
Are the printer and options AC line cords connected
properly?
2
Make sure the communications cable from the finisher
to the printer is installed correctly at the output options
autoconnect on the printer.
Is the cable installed correctly?
3
Disconnect the autoconnect cable from J7 on the
engine board. Check the resistance between J7-6 and
J7-7 on the cable connector. The resistance measures
between 45 ohms and 50 ohms.
Is the resistance correct?
Yes
No
Go to step 2
If not installed,
install the bracket
Go to step 3
Find out why the
pin is not actuating
the switch and
repair as
necessary.
Go to step 4
Install the cable
correctly
Replace the joint
Go to step 5
switch assembly
Go to step 6
Replace the joint
switch assembly.
Replace the
Replace the cable.
finisher system
board.
Yes
No
Go to step 2
Connect the printer
and options
correctly
Go to step 3
Install the cable
correctly.
Go to step 6
Go to step 4
Diagnostic information
5060-00x
2-123
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