One of the fixtures I am refurbishing has a non-functional stepper motor direction (tilt), not the one that rotates the mirror (pan).

Sizewise it's a 17, (42 x 42 x 32), but I have no idea of the step angle or voltage etc.. There are no discernable markings on any of the 4 5S's I have.

Does anyone have this information to hand, I can't find it anywhere ....