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Re: K150-6 pumps out DC voltage when powered on. [message #27669 is a reply to message #23707] Tue, 18 February 2020 06:08 Go to previous messageGo to previous message
stevem is currently offline  stevem
Messages: 4728
Registered: June 2004
Location: NY
Senior Member
Another thing to try is heat.

Take a hair dryer hold a plastic funnel over it and apply the heat to the heat sink area where the output Transistors and bias diode are until that area feels noticeably warm, but not burn your finger hot.

Next turn on the amp and see if it's already acting up, if not then move on to the circuit board, but if it foes act up then let it cool down and then before you play the amp again for 5 minutes pull that bias diode up out of its clip and see if the issue does not happen or is delayed a bunch.

Take great care pulling that diode up out of its clip because it's leads are very fragile!
 
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