I found that green reflection for AA was misaligned a lot. I aligned steering mirrors for AA to make the green beam at the center of both QPDs. DC centering loop can be locked, but AA loop could not be locked. I checked AA setting and it was completely different from previous setting in elog2850 (Fig. 1). I brought it back to the previous setting and AA loop seems working now.

To check the IR alignment, I injected BAB to FC. I could not find BAB transmission, but I found BAB reflection from FC. I will maximize the BAB reflection and recover IR alignment soon.