Each A-100 PSU board (except the very first series from 1996/1997) is
equipped with two LEDs: one for +12V, one for -12V. The assignment of the
LEDs to +/-12V is explained by the silk screen printing on the pc board.

In addition each bus board is equipped with three LEDs: +12V, -12V and +5V.
The +5V LED lights up only if a 5V power supply is in use (additional +5V
PSU board or the low cost 5V adapter A-100AD5). The LEDs for +12V and -12V
have to light up in every case for correct operation.

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von
> superstandardsuperstandard
> Gesendet: Montag, 23. Januar 2006 15:20
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 PSU - which LEDs light up
>
>
> I'm quite new to this group - so hello everybody, I'am Lukas.
>
> what LEDs normally light up on a 1200mA A-100 PSU
>
> Background: I've got a Analogue Sol MT16 Midi-to Trigger Module
> which doesnt do
> anything, but: The 5V in the upper right corner of my PSU doesnt
> light up (the MT16 needs
> the 5V source)
>
> My other Modules all work well - is it possible that only the 5V
> source crashes while 12V is
> still o.k
>
> thanks for some feedback!
>
> Best
> Lukas
>
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