I have a number of components on a board that I am trying to identify and was wondering if anyone can help with this. These are all SMDs on a underwater camera strobe (Sea & Sea YS-27DX)

Five pin device identified as an IC (U1 and U6) with markings T F
Four pin device identified as Silicon controlled rectifier with markings 692 CD
Transistor with markings HQ and then vertically 1E
Five pin transformer with markings C.000

Thanks in advance.