Cgs synth

--- In cgs_synth@yahoogroups.com, "stiebz" <theevaporizer@...> wrote:
>
> When test running my newly build super psycho lfo, I found only lfo 3 &
> 4 working. But what worried me more was the R10 resistor in the power
> filter that burned.It was the one on the +15V side of the circuit.Also
> the 100n capacitors surrounding the resistor got really hot.
> As far as I can see, the part for the power seems to be correct. No
> electro capacitors seems to be wrong positioned.
> The -15V side looks still OK and did not get hot.
>
> What could be a possible reason for this ?
> Should I keep looking at the powersupply filter circuit or could it be
> a shortcircuit/wiring mistake in an other location ?
>

>When test running my newly build super psycho lfo, I found only lfo 3 &
>4 working. But what worried me more was the R10 resistor in the power
>filter that burned.It was the one on the +15V side of the circuit.Also
>the 100n capacitors surrounding the resistor got really hot.
>As far as I can see, the part for the power seems to be correct. No
>electro capacitors seems to be wrong positioned.
>The -15V side looks still OK and did not get hot.
>
>What could be a possible reason for this ?
>Should I keep looking at the powersupply filter circuit or could it be
>a shortcircuit/wiring mistake in an other location ?
>
>
>
>
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
>
>

> it sounds like you have +15V shorting to ground somewhere -check
> wiring and soldering.
> i've fried a few 10R resistors - its a nice safety net to have them
>
>
> --- In cgs_synth@yahoogroups.com, "stiebz" <theevaporizer@...> wrote:
>
>> When test running my newly build super psycho lfo, I found only lfo 3 &
>> 4 working. But what worried me more was the R10 resistor in the power
>> filter that burned.It was the one on the +15V side of the circuit.Also
>> the 100n capacitors surrounding the resistor got really hot.
>> As far as I can see, the part for the power seems to be correct. No
>> electro capacitors seems to be wrong positioned.
>> The -15V side looks still OK and did not get hot.
>>
>> What could be a possible reason for this ?
>> Should I keep looking at the powersupply filter circuit or could it be
>> a shortcircuit/wiring mistake in an other location ?
>>
>>
>
>
>
>
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
>
> Yahoo! Groups Links
>
>
>
>
>

--- In cgs_synth@yahoogroups.com, sasami@... wrote:
>
> Component recognition problems. I very much doubt a 100n could get
hot on
> its own. Either something is heating it via radiation/conduction
(i.e heated
> BY the 10R), or alternately, it isn't a capacitor at all, which
would
> explain the 10 ohm resistor going up in smoke.
>
> Is anything else getting hot? The chip for example?
>
> Ken
>
> >When test running my newly build super psycho lfo, I found only
lfo 3 &
> >4 working. But what worried me more was the R10 resistor in the
power
> >filter that burned.It was the one on the +15V side of the
circuit.Also
> >the 100n capacitors surrounding the resistor got really hot.
> >As far as I can see, the part for the power seems to be correct.
No
> >electro capacitors seems to be wrong positioned.
> >The -15V side looks still OK and did not get hot.
> >
> >What could be a possible reason for this ?
> >Should I keep looking at the powersupply filter circuit or could
it be
> >a shortcircuit/wiring mistake in an other location ?
> >
> >
> >
> >
> >
> >The CGS Modular Synth home page: http://www.cgs.synth.net/
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
>
______________________________________________________________________
_
> Ken Stone sasami@...
> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> Australian Miniature Horses & Ponies
<http://www.blaze.net.au/~sasami/>
>