Previous: Guider check-list for each field
- No light reaching the detector:
- There are two ``clam-shell" shutters which could conceivably be
closed. The upper one is held in place with a clamp that requires an
allen wrench to loosen it, so this is unlikely to be the culprit.
The lower clam-shell is opened and closed using a wheel near the
base of the telescope; check that it is indeed open.
Mon Apr 3 09:15:22 MST 1995