Lexmark T620 Service Manual page 154

4069-5XX/7XX
Printer does not recognize StapleSmart Finisher option as being
installed.
FRU
1 StapleSmart Finisher
Option
2 Stapler Motor/Drive
Assembly
Stapler Card Assembly
2-126
Service Manual
Action
Ensure that the StapleSmart finisher
is the only option that is not
recognized by the base printer. If the
finisher is the only option not
recognized by the printer continue
with step 2. If not, check the
autoconnects of the options not
recognized and the interconnect
board and cable connectors.
Check the autoconnects for signs of
damage, especially the connector
pins. Remove the right side cover
and check the cables at J1A, J1B
(bottom autoconnect) J14A, J14B
(top autoconnect) to the stapler card
assembly to make sure they are
attached securely. Check the
voltages at the printer top
autoconnect. If incorrect, remove the
finisher option and go to
"Autoconnect - Top" on
page 5-11. If voltages are correct,
reinstall the finisher option and
check the voltages at J1A and J1B
on the connector. If correct, replace
the stapler card assembly. If
incorrect, replace the stapler motor/
drive mechanical assembly.