No Tilt - Skytec DMX Robo Scan (same as Eurolite TS-250)

[buges]

Hi

 

The tilt has gone on one of my Skytec DMX Robo Scan's (it's the same as a eurolite TS-250 & a skytronic something!) everything else is fine.

 

Sice I have more than one of these I have tried swapping the tilt motors & wiring over with the good scanner & the motor & wiring is good, Swapped over both processor chips & they are both good, & all 3 uln2803a's (darlington arrays) are good.

 

before it start desoldering components on the pcb does anybody know if there is a common component thats fails, if so which one?

 

 

 

 

And I more thing, does anyone know what unipolar stepper motors drive colour,gobo & stutter? There all the same but have no markings on them!

 

Thanks