7e0d9049_odes_and_Solutions___PC_Mediks__Cause
[Error Code] 50,51,52,57,5A,5B,5C,5D 5E,6C,6F,70,71,72,73,7A 7D [Solution] Clear the paper jam. If the problem still continues after clearing the paper jam, try to clean the encoder strip behind the printer head [Cause] 
The machine does not work due to a paper jam or some sensor problem.
Brother Printer Error Codes and Solutions | PC Mediks
Cause