> Hi all
> I've just picked up a used A154 and hooked it up to the A155
> (correctly...I've double checked everything).
> It's powering up but I'm getting odd sequences:
> On row 1 steps 1 - 2 and 8 are lighting up only and then only 1
> and 8 triggering with a cv.
> On row 2 the same but no cv.
> Switching back to A155 and using an external clock results in the same.
> Disconnect the A154 and use the A155 on its own and everything is ok.
> Could the A154 be faulty
>
> Regards
>
> Mark

From your explanations I suppose that the A-154 is faulty and has to be
repaired.

Best wishes
Dieter Doepfer