I got a call on a NEC IT3640D copier stating that it was jamming and producing light copies. I found a disaster (toner) inside the machine and had to clean the entire paper path to cure the jamming issue. The light copy issue appeared to be the result of a leaking dev unit. I replaced it, the drum, charge wire, new developer, and ran F8. Everything looked good except that it is still printing faded copies. One copy might look decent and the very next will be so light that you cant read it. I am out of ideas...ant input would be greatly appreciated. I also replace the developer bulbs behind the dev unit.
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