Question about Yamaha DSPE390 Amplifier

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Power suply no osolation on power suply i change regulator and other capacitor

Posted by zoilo on

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Can you explain more of what is your concern? what help do you need.

Reden

Posted on Mar 19, 2008

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Osolation? What do you mean - isolation, or oscillation?

Posted on Sep 03, 2007

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It's seems your backlight inverter is burnt out... need to be replaced with a new one or you can repaired yourself by testing all the capacitors to see which it has been burnt out or has a leaked. After that just replaced the bad caps... Good lucks, Have nice a day!

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Firstly check for the surrounding components like th coupling resistors for a short. Change them, then look for leaky diodes (a diode shows low resistance when connected to a multimeter with correct polarity and MUST show infinite i.e. NO resistance at all when polarity of the meter testprods are reversed) As for the deformed capacitor change it with similar type, voltage and size.
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Better still, if you are not good at soldering components that are so closely attached on the circuit board, just give it to an authorised service center in your area.

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