Samsung MultiXpress M537x series Service Manual page 279

f) Replace the Finisher main control board(JC81–07242A).
3) Is the Stacker Motor (M8) working?
a) Check if the connector(SJ10 8360) of stacker motor is disconnected.
b) Check if the connector(SJ10 8360) J14 on the finisher main board(JC81–07242A) is disconnected.
c) Check continuity and if the harness is damaged, replace as is necessary.
d) Replace the stack motor(M8).
4) Replace the Finisher main control board(JC81–07242A).
Copyright© 1995-2013 SAMSUNG. All rights reserved.
4. Troubleshooting
4-143