Originally Posted by
Zia Graphy
Okay here's the update. I went ahead and rebuilt the fuser. New hot roller, pressure roller, pressure roller bearings, lamps, thermistors, and thermistor brackets. The lamps have updated part #s and they look a little different than the old ones. AX44 0215 - 120V 280W, AX44 0304 - 120V 650W, AX44 0305 - 120V 550W. Also the brackets have new part #'s. D062 4196 - Back, D062 4197 - Middle.
After replacing the parts I still have the same problem, fusing temp drops to 138C over the course of 25+ copies. So I think maybe the PSU isn't supplying enough power to the lamps or perhaps the BCU isn't giving the 5V signal to the PSU. I replace the BCU and PSU (boards off a used machine) and still no change. I did swap the EEPROM on the BCU as per the service manual. Still no luck. My next course of action is to check the connector at the back of the machine where the fuser unit plugs in, and then start checking connections from there to the BCU to look for breaks. I can't believe this problem persists. I'll post the solution when I figure it out in case anyone else runs into this.
In the mean time I'm certainly open to any suggestions!
Could this be a "frimware" problem? My current versions are:
System/Copy B1415211J 1.22.1
Enging B1635127 5.20a:36
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