MDM Trouble Report for 2002 Jun 14

Telescope: 1.3m
Observer(s): Scaife, Terndrup (OSU)
Instrument: 8K

Problem(s) Encountered:
About 01:30, we received an error message in detcom 
terminating in  some pixels might be missing  (or
something like that).  After several more exposures,
we noted that the data values in image sections 4-7
were crazy.

Then error messages such as
  Can't communicate with 2nd timing board.    or
  Can't communicate with 2nd utility board. 
began to appear.

We followed steps #1 and #2 on the webpage  Rescue
procedures in case of failing exposures.   (Cycle 
power, then cycle power + restart DetCom).  Nothing
happened.

It appeared that one of the fibers (the upper one)
on the slave box was not hitting the box perpendicular
to it.  It came lose from the slave box with only
the slightest tug.

We carefully reinserted the fiber and then followed
steps #1 and #2 of the rescue procedure again.

The 8K then came up normally (no error messages,
correct voltages displayed for first and second 
voltages, etc.)

We proceded to take data.  Two hours were lost (about
1 not noticing the data were flaky, 1 involved in
restarting the 8K).



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Submitted on 2002 Jun 14 [3:42:44]