NP 6551 fuser error

[euro scott]

i have a 6551 in the field that is really tryin my patience. it has been giving fuser codes(e000,e001,e003) for some time. i started by replacing the thermistors, the machine ran for a day, then coded again. i verified all is well in the fuser by checking lamps, bushings, bearings, web. the assembly looks like new. so then i replaced the ac driver, with no improvement. the machine with power on, come to a ready state, and make copies, but only for a few minutes. then it codes out, and the code veries(usually e000, but sometimes e001). what am i overlooking? i know it is an old machine, but it is super clean with a low meter. please help.
thanx in advance

[11x17]

possibly shim the fuser connector for better connection and make sure xport tray locks into place and the catch is not sluggish due to fuser oil.

Good luck

[20YRSEXP]

I agree with 11x17, shim for sure even if it isn't the problem it won't hurt, just don't over shim it . I have seen a lot of latches being sluggish too due to oil build up. the only things I might add is be sure the drawer rails are secure and not sagging. that can cause poor contact and intermittent codes. Also anyone familiar with Canon knows to cut wire ties. I would cut the ties from the connector to the DC Controller. I usually massage the wires a little to settle them back in. good luck.

[555]

look for a tiny piece of paper pushed into the contacts of the fixing connecter check conn. on fixing feeder assy