BizHub Pro 1050 Error code

[the pipster]

I keep getting a SC77-77 error code on startup then the machine bypasses the saddle stitch unit and continues to operate normally (except no saddle stitch function). I poked around in the unit and found nothing obviously wrong, but if someone could point me in the right direction with the code it would be helpful.

[JustManuals]

SC77-77:
Bundle press home sensor (PS37)
does not turned ON within a specified
period of time after the bundle
press motor (M23) starts the
home position search operation.
Or, even after a specified period of
time after M23 starts the operation, it does not stop.
JustManuals (http://www.justmanuals.com/konicaminolta-bizhub-10501050p-parts-service-p-31092.html)

Paul@justmanuals.com