[sdiy] Siel OR400 power supply busted

[M Maeghan Skala]

Before i go messing shit up .. how should i connect my scope? here's the one i have:

http://tvforfree.files.wordpress.com/2011/09/eico_460_lingo.jpg

Could you tell me how to connect it? It doesn't take banana plugs, i think i need to to just wrap wire around the input but I want to be sure … 

On Aug 6, 2013, at 11:43 AM, "Needham, Alan" <Alan.Needham at centrica.com> wrote:

> 
> If the PSU output was disconnected is it really likely that the short could damage anything beyond the PSU?
> I have seen mains shorts creating flashes that lit boxes up, could it be just that? Light bouncing around in the box?
> Maybe there is something else causing the issue here, the PSU is OK now, keep going!
> 
> IC3 is a 'top octave generator' chip, it takes a fast clock in on pin 2 and divides it down to give the highest notes, probably 1 foot pitch.
> Is there any sign of a clock into IC3 pin 2? - IC2 pin 1 is the same signal if it's easier to get at.  (oscilloscope job, timebase up at 20us/div or even 5us/div).
> I guess you should see a square wave of 6 or 12v amplitude.
> 
> Oscilloscope! You say you made a lead for it... be careful with the ground side if both 'scope and synth are earthed - connecting to anything but 0v could short things out.
> 
> 
> -----Original Message-----
> From: On Behalf Of M Maeghan Skala
> 
> Later I decided to push the socket out a little bit and secure the power supply board back down. At this time, I didn't reconnect the ribbon cable that takes power from the power supply and sends it to the rest of the synth's circuitry.
> 
> Turned the OR400 on and a big spark :(
> 
> Fortunately, power wasn't supplied to the rest of the synth
> cheers ~ maeghan/pulsewidthmod
> ______________________________________________
> -----Original Message-----
> From: On Behalf Of M Maeghan Skala
> 
> I got the power supply working :)
> 
> But the synth isn't working. I'm gonna guess that even though the power wasn't being distributed to the rest of the circuitry, that when the short circuit happened ... it arced and friend some components.
> 
> THe synth is now turning on, and getting the proper voltages (not perfect but .1 off on some of the leads) ... no sound.
> 
> Here's my question: should I consider the synth dead? or is this something that can be fixed? 
> 
> I did see an arc flash beneath the enclosure when this happened.
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