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Amp power my samson S1500 will not power up. i've checked all of the fuses that i can see with the top cover off, and they are fine and the circut breaker is not tripped. im stuck

Posted by scottymac on

  • rkaldor Nov 30, 2007

    I sold my ADCOM GFA 5802 power amp on Ebay. The buyer says it won't fire up, that is won't turn on. I'm stumped as it worked fine when I sold it.



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Scottymac and to all. Power transformer for power amplifier are high current. resistance on both primary and sec are surely very low, one can think its shorted. If all fuse and breaker are OK surely it will fire up or at least show some indication that power is present...lamp or led display for the power, clip and protect (basically)...provided that the SWITCH is also functional. Switch, fuse, Volt selector and the transformer primary is just about what makes the whole circuit to fire your transformer. If all of this components are OK, it should and surely will fire up...But what about if the transformer being switch on by a TRIAC (Thyristor) found in most new AMP today? Make a double check. Hope this will help. Good Luck.

Posted on Jan 03, 2008



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Question on the Transformer resistance measurement. If the secondary windings output without load only shows less than 1 ohm but the voltage across the 2 output wires is about 15V, is this Transformer still OK? Is this normal that the Transformer output impedance or resistance number that very low?

Posted on Dec 10, 2007


Randy Herring

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Make shure with an ohm meter that the primary and secondary windings have very little resistance on the main trasformer,then check voltage in trasformer and out from transformer...BIGRED

Posted on Sep 16, 2007

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