[sdiy] X0xb0x almost working

[Jeff Farr]

The flux probably isn't the problem, but be sure to clean it all anyway. I'd
look into getting one of the software scopes mentioned in the forums, it's a
real pain to toubleshoot without 'em. I don't have mine built as far as you
yet but if your getting the proper signal at VR8 then most likely everything
in the synth is working properly. Double check all the solder joints around
Q33, Q34 etc. You won't get anything out of the headphones if the main outs
are not working as the two circuits are in serial. Perhaps one of the
experts around here can enlighten us as to how Q33 and 34 work so we can
work out some voltages to test for?

On 10/29/05, Joseph Palermo <fatjoebear at tmail.com> wrote:
>
> built my x0xb0x, test the psu, all good, built the rest, seq seems to be
> working but no audio output from phones or mix out. I don't have a
> scope, just a bench supply and 2 multimeters. The only other test that
> passed is that I'm getting a the osc sound when I probe the pins on vr8
> and trigger r146 from r3. Any x0xb0xers have a clue what I screwed up.
> I've gone over the board at least 7 times now, found 2 resistors wrong,
> and after the first time I fired it up I noticed ic9 was backwords(gotta
> love sockets). I'm almost crazy at this point, I cleaned the board with
> iso alcho to remove all the flux, didn't get it all, could that be my
> problem.
>
> Thanks in advance
> E.O.J the Bum
>
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