Question about Pyramid - PS21KX 20 Amp Power Supply Car Audio Amplifier
I got this from a friend and the transistors on the back were bad so I replaced them now when it powers up i get 12 volts then it dropsto 2.5 or so in a matter of 5 to 10 seconds and the overload light comes on what is causing this???I have a schematic but it says to refer to owners manual for the light but I dont have one.Please let me know ...Thank you
The problem I have had with a PS-20 is a blown capacitor. Hooked to a radio, would allow radio to receive fine, but when trying to transmit, amperage would bottom out. Behind the transformer is a large circuit board. UNPLUG POWER SUPPLY, remove cover, Undo the two nuts, flip board over, and gently rock the 4700uf capacitors side to side. If they move more than 1/16th of an inch, chances are they are blown. Remove/replace and should be good to go...
Posted on Mar 14, 2010
There are obviously more bad parts inside that need replacing.
Posted on May 09, 2008
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Posted on Jan 02, 2017
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