Hello, I have in front of me a Compur Electronic shutter - which is a shutter I know nothing about! It seems (to me) stuck in T mode, i.e with the shutter time scale set to T, it functions as it should, operating the black release lever opens the shutter, operating it again closes it... The small red flag next to the T is up - which I assume indicates that the shutter is in T mode. When I turn the shutter time selection ring to any of the other times (which is freely possible) the red flag does stay up, the shutter still opens when the release lever is pressed, but stays open, until the cocking lever is spanned, which closes the shutter. There is no difference to this behaviour between running the shutter with or without 4.5V supply connected.

So, is this shutter likely toast, or is there a procedure to take it out of T mode to operate it timed? Thank you for any advise!