hp4730 Drum phase sensor out of range

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I have an hp 4730mfp (Q7520A) that gets daily intermittent jams. I've replaced the fuser with no luck. Any tips?


Log has been showing as...

[TABLE="class: hpTable"]
[TR]
[TD="align: left"]50[/TD]
[TD="align: left"] Nov-19-2015 08:42 AM
[/TD]
[TD="align: left"] 849387[/TD]
[TD="align: left"] 13.06.00[/TD]
[TD="align: left"] 46.380.3[/TD]
[TD="align: left"] FUSER OUTPUT, PAPER STOPPED JAM[/TD]
[/TR]
[TR]
[TD="align: left"] 49
[/TD]
[TD="align: left"] Nov-19-2015 08:11 AM[/TD]
[TD="align: left"] 849377[/TD]
[TD="align: left"] 54.08[/TD]
[TD="align: left"] 46.380.3[/TD]
[TD="align: left"] Drum phase sensor out of range[/TD]
[/TR]
[/TABLE]