[Error Code] ECOSYS P6021cdn error F186

[Kyocera_77]

hello...Does anyone know how can leave this code...I have spent the last upgrade(firmware),update drivers,use xl,pc5e,kpdl but error still there,not all times...the best option that rarer works is in KPDL with bitmap as download fonts...any suggestion?

[DWise]

Re: ECOSYS P6021cdn error F186

Replace the Main PWB