Inspection of the machine and screwmotor was done on 6/2/2016.For an initial inspection of the machine, the shipping shrink wrap was removed and the machine was plugged in.As soon as the machine was plugged in the machine started rotating - the power button was left on.This machine rotation is normal after powering up a machine that had just shipped, because the equipment will find its home position on start up.Rotation will not cause injury due to the slip belt design; rotation is easily stopped if it hits an obstruction.The up motor button was pressed and the machine began to move up; the down motor button was pressed and the machine moved down.Preliminary observation is that the screwmotor was working fine and that this machine did not fall.During the initial check, it was observed that a screwmotor warning decal had been placed on the control panel side plastic cover of the machine.Once the initial observations were complete, power was turned off and the screwmotor was removed from the machine for a closer inspection.Once power was applied to the screwmotor assembly the nut assembly was able to be threaded off of the shaft.The t-nut assembly has all of the treads intact and was operating normally.This screwmotor assembly did not appear to have failed.While doing the investigation on the screwmotor additional observations were made about this returned machine.This machine was very dusty; it appears it had been sitting for an extended period of time.The exposure switch on the machine had been replaced with a non-panoramic replacement parts.It appears this machine was serviced by a non-factory trained panoramic technician.When trying to remove the screwmotor it became necessary to undo some wiring routed incorrectly by whoever was servicing this equipment.They had incorrectly routed the limit switch cabling over the electric plate assembly instead of underneath like factory routing and then preceded to weave the cabling between other cable assemblies.It appears at some point during their attempt to reconnect this limit switch cable they lost track of the connections because one of the wires was stripped (assume to find the hot wire) and wrapped in electrical tape.
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