Reports until 12:59, Thursday 25 April 2024
H1 SQZ (CDS)
filiberto.clara@LIGO.ORG - posted 12:59, Thursday 25 April 2024 - last comment - 14:55, Thursday 25 April 2024(77418)
SQZT0 - Laser Locking Fiber Beat Note Chassis Replaced

WP 11832

While troubleshooting TTFSS (alog 77403), Sheila and Camilla found issues with the D2300329 Laser Locking Fiber Beat Note Chassis. Unit was replaced with spare. SQZ team reports outputs back to nominal.

Removed unit had power regulator board D100217 failed. Output capacitor C7 was shorting +15V rail to ground. Power regulator board replaced.

Installed Chassis S2300259
Removed Chassis S2300258

Comments related to this report
camilla.compton@LIGO.ORG - 14:55, Thursday 25 April 2024 (77425)
Link

We created FRS 31061, this maybe also related to H1-SQZ-R1 issues in 77424.