Reports until 10:48, Tuesday 28 August 2018
H1 TCS (TCS)
marc.pirello@LIGO.ORG - posted 10:48, Tuesday 28 August 2018 (43692)
Repair TCS AA Chassis to solve read-back issues on CO2Y.

Richard, Marc

We pulled the TCS CO2Y AA Chassis S1301168 per WP7795 to investigate bad read-backs for voltage and current.  The AD8622 opamps on channels 19 and 20 tested as inoperable.  Visual inspection showed these opamps had suffered catastrophic failure, they were replaced.

Standoffs on the front DB9 and DB37 were not even with the connector.  This can prevent the connector from seating properly, these standoffs were swapped out with lower profile standoffs which will allow for better seating of the connector.

The chassis was put back into service.