MCM 107 timeline
History of MCM 107
- ?-May-99: arrival at LANL, visually inspected
- ?-May-99: at LANL, glue output cable to MCM
- ?-May-99: sent to Pace to install surface mount components
- ?-May-99: visual inspection, no problems reported.
- 9-Jul-99: at LANL,
failed MCM QA test
(7/8 channels doen't work, AMU/ADC problem).
- 5-Aug-99: repeat MCM QA,
failed -- same problem (7/8 channels dont work,
AMU/ADC problem) .
- ?-Aug-99: probe surface mount components, 2 cases of cracked epoxy
and a missing component seen
- 11-Aug-99: send back to pace to replace 4 surface mount components and
fix other problems
- 18-Aug-99: Another inspection of surface mount components. More shorts found
The shorts over the AMU/ADCs remained even after the surface-mount
caps were removed.
- 27-Aug-99: Another inspection of surface mount components. 9 shorts found,
including one over each AMU/ADC.
John Sullivan
updated 15-Sep-1999