Xerox DC 250 Little Black Spots (Damage) On Black Drum

My dear forum members.

I have a very challenging situation with my Xerox Dc 250 Copy printer:

The problem lies with black section; prints black sports on a print out.

When I removed the drum unit I noticed that there were a lot of spots on the surface of the drum and the drum got damaged . They weren’t the toners that formed the spots but they were peeled out coated layers of drum. (in little -little spots.) The new drum on the machine hardly prints 200 to 300 copies and it will damaged the drum with spots again.

I had lost new 6 assembly of black drum cartridge units caused of this problems

I had changed developer unit, the problem remained the same.

I had filtered all developer to see if there is any sandy material or foreign object but I could find any thing in it .

I consulted other technician he said that my electric power supply is bad , I went and purchased battery -inverter and sourced my electric supply from it, the problem still remained the same.

Please can any one help me and solve my challenge.

Thank you .



Timothy Dunu

 

Have you checked your power in the building? Make sure you are within the recommended power by Xerox. It may be the K BIAS PWB is supplying too much voltage to the K Drum.

 

thanks so much i will check