Difference: AMC13DebugLog (79 vs. 80)

Revision 8013 Sep 2013 - EricHazen

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META TOPICPARENT name="CmsSlhc"
Please log AMC13 test activity below, blog style (new entries at top)
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  • (Yesterday) Wu looks at #39 T1 board and finds that the +12V draws excessive current above about ~1V:
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 AMC13XG #39 is dead because most likely one of the components on the 12V line is shorted to ground so there's no power supply for the module. There are four power ICs and eight capacitors connected to the 12V line. We need to remove these ICs one by one to find the culprit. Capacitors are unlikely the source of the problem. The ICs are U9, U16, U19 and U13 Caps are C146, C147, C148, C161, C162, C186, C187 and C159
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  • confirm that #34 doesn't power up in our crate. MMC complains about power out of spec and requests payload power shutdown.
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 Additional check of the working parts from the broken Cornell boards
  • Combination of SN39 T2 board with SN34 T1 board seems to power up and can be communicated with (used AMC13Tool).
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Setting Cornell MCH I/P address 192.168.1.5
 

2013-09-12, David

Investigating dead AMC13XG #39 (from Cornell). Board does not seem to be powering up properly. Swapped T1 and T2 board with components from a working AMC13XG (#43).
 
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