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    User name brads

    Log entry time 13:24:33 on April 12, 2008

    Entry number 231609

    Followups:

    keyword=Did not find shorted signal wire on Chamber 2 U13 connector

    I was not able to identify the shorted signal wire on Chamber 2 U13 connector. Here's what I attempted:

    I unplugged the HV cable for the 'Upper CH2 Field' planes (bottom-most connector on card 14). I shorted the central conductor to ground on that end of the HV cable. Then I looked for a finite resistance between a signal pin on U13 and the chamber ground. All pins showed open circuit (as they should).

    So, either our conclusion that a field wire had bonded to a signal wire on U13 is incorrect or the problem fixed itself. I will try plugging in a new A/D card when I get the chance.