Reconstructing the story of the B Shift:
--The ROC module residing on the right sector was replaced with a new one
.At this point both sector data was bad (using xcefdump)
--Replaced ROC module back with original still didn't work
--Replaced Right Sector SFI. Still didn't work
--Karen came in and discovered that someone had switched the roc modules
without notifying anyone. Since the ID's reside on the boards what was
thought the whole time to be problems with the right sector was really the
left. Note:Because the replacement board was configured for the left
sector, this explained why both sector data was bad with two left configured
boards are in.
--After exhausting all permutation of SFI's/modules between the right and
left, we are still left with the left sector not working.
--Karen will investigate the problem further tomorrow morning.
Chi and Adam
Special thanks to Brian O' Rourke for removing the stripped screw w/o
hurting the module or anyone around
Peter Karpius wrote:
> The Fastbus troubleshooting continued for the rest of the shift.
>
> After speaking with Karen we found that there was no connection between
> the L crate and R power supply other than in the current configuration
> both SFI's must be powered for CODA to run.
>
> Since we had Left TDC's and ADC's but missing Right ADC/TDC signals we,
> upon Karen's suggestion, swapped cables. We exchanged the LTOPTDC for
> RTOPTDC and saw that the RIGHT data returned and now left was gone. This
> told us that either the SFI, the TS-SFI cable, or the entire
> right Fastbus crate was bad.
>
> Tancredi suggested that we swap the SFI's. In attempting to do this we
> noticed that a screw on the R SFI has been stripped and we could not
> remove the module. At change if shift Chi and Adam were to consult
> Ernie Ihloff (who was working in the South Hal) about removing the
> stripped screw and thus being able to swap SFI's.
>
> Pete
>
> ----------------------------------------------
> Pete Karpius
> Graduate Research Assistant
> Nuclear Physics Group
> University of New Hampshire
> phone: (603)862-1220
> FAX: (603)862-2998
> email: karpiusp@einstein.unh.edu
> http://pubpages.unh.edu/~pkarpius/homepage.htm
> ----------------------------------------------
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