PCB removal where lockable XLR sockets are used (how to). These are in/out PCBs from Wadia 861

Use thin screwdriver and turn the screw between pins 1 and 3 1/8 turn anticlockwise to release the XLR lock, and then slide the board out. Naturally, you have to undo all other fasteners holding the board, including other sockets and screws on the rear panel of the device.