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    User name Jack

    Log entry time 11:04:37 on August 27, 2009

    Entry number 286253


    keyword=Left Arm VDC threshold

    The EPICS EDM display has been showing the Left Arm Bottom VDC threshold readback as low. Actually, that is the Top VDC. There is a bad solder joint between the V7 and V6 amplifiers on the left side of the top VDC, low momentum end. The joint is on a wire crossing from one mounting circuit board to another. It is too tight for me to try re-soldering the connection. We will make a jumper wire and install it when we are able. I wiggled the joint till I got continuity across it, but it will undoubtedly fail with changes in temperature and such.