Hello and thanks for your question. I look forward to assisting you today with the best answer possible.Can you tell me the exact error message with code ?Regards,
Message is as follows
Drum Error. See troubleshooting and routine maintenance chapter in user's guide.
I have cleaned the corona wire.
I have replaced the drum unit.
And still it beeps and keeps displaying this message.
We have to reset the drum counter.Follow the steps below:Make sure that the machine is turned on. Then open the front cover.Then press Clear or Clear/Back on the control panel. If your printer has a numeric keypad then press 1 to reset the drum counter. If your printer doesn't have a numeric keypad then press the Up Arrow Key to reset the drum counter.When the LCD shows Accepted, close the front cover.Tell me if it makes any difference to your problem.Please don't rate this answer until your problem is solved. If this answer doesn't works then reply using the Reply to expert feature.Regards