[sdiy] Can I use two 1/4w resistors instead of one 1/2w ?

[Gil W.]

Of course, 
http://itec.uka.de/~buchty/eps-sch.pdf

This synth arrived with a severe power supply damage. It had diode CR2 short out, Fuse F3 bad, C14 (470uf) blown (the top of the cap swelled)
and the 1/2W resistor I mentioned (R5), fried and non conductive.

I of course replaced them all (R5 is currently replaced with the combination of three resistors). The instrument works for a few minutes and than freezes...






 I did find the original 1.2K 1/2W  resistor fried (along with other components) when I 

--- On Tue, 6/23/09, Needham, Alan <Alan.Needham at centrica.com> wrote:

> From: Needham, Alan <Alan.Needham at centrica.com>
> Subject: RE: [sdiy] Can I use two 1/4w resistors instead of one 1/2w ?
> To: "Gil W." <gil_we at yahoo.com>, "Magnus Danielson" <magnus at rubidium.dyndns.org>, synth-diy at dropmix.xs4all.nl
> Date: Tuesday, June 23, 2009, 2:19 PM
> This 'resistor' is getting hot
> because something else is drawing too
> much power (or the design pushes the 1/2W resistor to its
> limits ???).
> Maybe some semiconductor is shutting down due to it also
> overheating?
> Maybe there is a regulator doing exactly as it should and
> going into
> thermal overload due to some fault further into the
> circuit.
> 
> Any chance of the circuit diagram instead of guessing what
> this resistor
> is feeding?
>  
> 
> -----Original Message-----
> From: Gil W. [mailto:gil_we at yahoo.com]
> 
> Sent: 23 June 2009 10:31
> To: Magnus Danielson; synth-diy at dropmix.xs4all.nl;
> Needham, Alan
> Subject: RE: [sdiy] Can I use two 1/4w resistors instead of
> one 1/2w ?
> 
> 
> They get hot, but do not fry...
> 
> The system freeze happens about 10 minuted after I power it
> up. The
> system works perfectly before it freezes.
> 
> What to check for ? bad regulators maybe ?
> 
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