Need Help! Cortini H105 controler 2437

I need help with my cortini H105 with 2437 controller

I hope you excuse my english

There are som problems using G33 treading
The spindle cant find the speed i programed
so it dont starts treading and the spindle is turning faster
then the speed it ar showing in the screen.

It is the same problem when i program G1 with sett speed

I can program Constant cutting speed that works

there are 3 optical sensors on the spindle and i dont know
witch one who does what

When i got the lathe there was some loose wires in the big
connector on the back off the spindle and i tried to find
the right place for them but i am not shure

So i think i need a maintence manual or/and a electric diagram
if anybody on the forum has som info on this lathe

Please help.