[sdiy] Arp Odyssey 2 dead PSU

[dragons]

Hi,
I'm pleased to know that you managed to get the power supply and Arp 
working again.
I think if I was working on it I would be tempted to replace a few more 
of the tant caps with electrolytic ones.

regards Peter


Antonio Tuzzi wrote:
> Solved!
> (and more...)
> 
> was a transformer failure of a special kind...
>
> inspecting the board fror the foil side i discovered the GND track
> from the the main GND to the Rail GND was interrupted, seemed like
> FUSED!
> (maybe a power surge when the synth unattended ? Don't know!!! How can
> happen something like that)
> 
> anyway, recreated the connection and the PSU was ok again, -15v GND +15V
> 
> but when connected to the boards, the -15v was dropping to GND
> 
> attaching one board at time, the responsible was the board A (the one
> with CV memory and portamento and transpose). The tantalum cap C1
> (1uf) was dead.
> substituted it and this was luckily last damage! (pffffffeeeewww, I
> was worried the for very delicate 4023 that is a pain to desolder, and
> or the VCOs)
> 
> invested some time changing a couple of slider too... an trimmed it completely
> 
> what a wonderful synth!! ;)
> 
> thank you for your support!!
> 
> antonio
> 
>