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User name Jack
Log entry time 11:04:37 on August 27, 2009
Entry number 286253
Followups:
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.