[SML] Moving light funkiness

[billn at peak.org]

> If I fly the batten in, and remove the covers, it will strike and
> operate normally.  But striking it with the covers on yields every error
> in the book.
>
> I've looked, there doesn't appear to be anything on the cover sticking
> into a sensor.  (Then again, I can't see inside when the cover is on.)

Are there interlocks on the covers, which are supposed to disable the lamp HV
when the covers are removed?

Bill