I put in a brand new developer unit, using the new developer I had just replaced into the old developer unit, reset drum and maintenance counters, ran F8 again. The machine came into ready, ran (1) copy, jamed on fuser entry and C2557 fired again. I then reset the switch in the back (right hand side), reset the switch on the main board, reset drum and maintenance counters, ran F8 again. The machine came into ready, ran (1) copy, jamed on fuser entry and C2557 fired again.
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