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Old 2nd April 2006, 10:40 PM   #1
juan2681 is offline juan2681  United States
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Join Date: Apr 2006
Location: san antonio
Default need help

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
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Old 2nd April 2006, 10:43 PM   #2
anatech is offline anatech  Canada
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Join Date: Jun 2004
Location: Georgetown, On
need help
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.

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