Samsung ProXpress M453x series Service Manual page 195

4. Troubleshooting
5) Remove the fuser side cover L/R. Check if the Actuator cam, Gear cam are assembled correctly.
6) If there is no problem for above steps, assemble and reinstall fuser unit. Then turn the machine on.
7) If the same error persists, perform a Memory Clear (backup data in SWS first); if that does not work try reinstalling
the firmware.
8) If the same error persists, replace the fuser unit(JC91–01177A (220V) / JC91–01176A (110V)) with new one.
9) If the same error persists, replace the main board.
Copyright© 1995-2017 SAMSUNG. All rights reserved. 4-100