The Kepco Power Supply for SUS-C4 started chirping at the end of maintenance today. By 2pm the chirping is more regular. The draw on the supply is 7A, typical failing fans last a few days once they get to this stage. We should replace this one before the weekend, as a target of opportunity. Down time will be 30 mins start to finish.
M. Pirello, F. Clara
Due to earthquake we took a window of opportunity to replace the SUS-C4 Kepco Power Supply which controls HAM1 and HAM2 suspensions. These suspensions were placed into safe and the supply replaced. We replaced only the -18V supply, the +18V matching supply was replaced in December 2022 so we left it in place.
WP12406
M. Pirello, F. Clara