Description: Error in detection of new drum unit
Error in blowout of fuse for detection of new drum unit (process cartridge)
Remedy: Check the connection of drum unit, replace it Replace DC driver PCB
Code: E840-0000
Description: Fan shutter error
Fan shutter open/close operation Error Abnormal rotation of the fan shutter motor Defect of the fan shutter position sensor Defect of the fan shutter home position error Defect of the DC controller PCB
Remedy: - Replace the fan shutter motor - Replace the fan shutter position sensor - Replace the fan shutter home position sensor - Replace the DC controller PCB
Code: E990-0000
Description: Error in the waste toner shutter
When the output of the waste toner shutter opening and shutting detection sensor doesn't become "H" when it WMUPR period after the sleep returns after eight hours or more pass, the door opening and shutting is detected or main power switch turns on.
Remedy: - Check that the drum unit is properly installed - Replace the waste toner shutter sensor