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They are the same part number fro the drum. Did you clean the charge roller. If you don't replace the charge roller at least remove it and clean it with a damp cloth with water and then dry it.

The dev unit can do it if the mag roller scums over. Process error codes in the SMC can tell you if you are getting ID sensor errors.

Try this.

Pull the fuser unit out of the machine and check the lamp wires in the back of the fuser. Make sure they did not get caught in the drive gear. I have to ask but did you clear the fuser fault by going...

Check service program 3902-1 and check the value. It should be a 1. If it is 0 then process control is off and the machine is running defaults which can screw up the quality. Also check and tell me...

When you do the pm make sure you check the spring loaded cleaning brush drive in the rear of the machine. They can over time get stuck in when they get dirty. Make sure you clean unit is not backing...

Finisher Corner Stapler Motor Error Finishers B830/D434
The stapler motor did not switch off within the prescribed time. The 1st
detection failure issues a jam error, and the 2nd failure issues...

I am not clear on the problem. Are you getting lines on copies, grey background. light copies. You need to describe the problem better. You can go into service and print out the SMC report. 5990-4...

Just put a new charge corona unit. Once they arc out and blow the charge unit is finished.

Remove the image transfer belt unit and rotate it by hand. They usually tear on the rear edge and then the tear will jam the belt from rotating. If it is torn replace the belt with a new one.

To fix the multifeeds on the 2105 you need to go into service mode and go to service program sp1907-001 and set the value from 0 to 10. Do this on all sp modes for 1907-001 to 007. This will put a 10...