Sharp MX3550 error code L4-11

[sharptech]

What finisher option or receiving tray option do you have installed ?

T.G.G.

[boutn]

Thanks for the information.. new board ordered

Did this solve the issue?

[JLSam]

Thank you, I had an L4-11 on a Sharp MX-3570
Following MFP-TB-1429, MFP now requires an earth harness on the fusing paper guide unit.

Looks like static builds up and then in turn fries the PCU PWB, which in turn tells the OSM motor to go back and forth in a heretic way, which pretty much sounds like a loud grinding noise.

Solution:
New PCU-PWB (Transferred EEPROM).
New Earth Harness.
CN Emergency Firmware Update.

Thank you again, and good luck.