APC Smart-UPS 620INET (SU620INET) UPS System "ac capacitor diagram" Questions

ac power on when I disconnected the battery the My APC 620 VA ups needed battery replacement. For the time being to get the surge protection I was running the unit (without battery) with the help of a

...capacitor or a spark gap component across the AC line. I don?t think that?s original problem. Re-soldered the component back in place. Took the board completely out and unplugged all the connectors. ...