AW: [Doepfer_a100] a-154 strange behaviour
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> I just got an a155 fixed (which I can confirm is working properlyProvided that the A-155 is fine it looks like a faulty A-154. It might be a
> on its own),
> and carefully connected it to the a154 (from here
> I get strange behaviour - it jumps around steps 1 and 2 twice
> then 7 and 8 twice. Both were bought a trade forum, the a155 was
> cheap as it was broken and I just got it fixed, now I'm wondering
> if the a154 might be faulty?
> Does this behaviour sound familiar to anyone?
short circuit between address signals or an address signal which has a fix
level where it should change the state. I'd recommend to double check the
wiring between the A-154 and A-155. If this is OK maybe the address signal
level shifter (ULN2004) or the triple analog switch are faulty (CD4551).
Difficult to say from the distance what is wrong.