Got the service manual. All the paper sensors are turning on and off within the test mode. I looked up the last errpr code and it is 4200. Drum exceeded rotations. If that is the error why does it say paper jam under drum unit? I tried to do a factory reset, it won't reset. The manual says to press the OK key. There is no OK key. So I cannot reset to factory default. I don't want to go get a drum unit and not have it solve the error. Antone seen anything like this?
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