Burned out Power Supply

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Migs 31

Well-known member
Joined
Mar 29, 2010
Messages
369
Location
Europe
Hi there,

One of those cheap multiple voltages Wallwart PS made its way to me.
Apparently it was used on a Guitar Pedal at 9V, wrong polarity (simple change of connector side).
And the Magic White smoke came out, but was disconnected quickly by the Metal Head operating it.

I open it up and I can see a big 1 Watt or 2 Watt resistor is fried on the surface.
I measured it and it reads around 1.895 KΩ. in circuit.
Is it safe to Ass-ume that a partially fried Resistor will still keep it's resistance?
Is it safe to replace with a similar 1.8K resistor or should I go up to 2K ?!?
Or take it out of circuit and re-measure?


Please don't ask me for a schematic, I doubt any company would ever post a Schemo.
of this State of the Art Multitap Variable El Cheepo.😁

What do you think? Any advice?
Kind regards
M
 

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