There are 3 Adjustments that can be carried out, a fourth being the tracking weight on some arms they are depicted in the picture as H, J and K
H is the pick up set down position.
J is the pick up height
K is described as the "Pickup depth" and is set so that in play, the stylus should just touch the turntable mat.
And that's it, hopefully you will now have a fully working Collaro Studio autochanger.