need help

juan2681 · 2nd April 2006, 10:40 PM

i tried looking and culdnt find anything on this amp the la490 from lanzar i turn it on and it makes a low pop noise folowed by smoke

anatech · 2nd April 2006, 10:43 PM

Hi Juan,
Those are your inverter transistors burnt there.

Test the output transistors for shorts, also the inverters. You will find silicon death. Once you found the reason for the high current draw you can repair the power supply.

-Chris

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2nd April 2006, 10:43 PM	#2
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Juan, Those are your inverter transistors burnt there. Test the output transistors for shorts, also the inverters. You will find silicon death. Once you found the reason for the high current draw you can repair the power supply. -Chris

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