Question about Hifonics BX2200D Car Audio Amplifier

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My bx2200 cut off as soon as it was turned on and started smoking?

Took the bottom cover off and can see soot an char on a couple of the black parts that are mounted down the side of the heatsink. there is about six on each side of the amplifier

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These are the trasistors..The ones closest to the power connectors are probably the ones for power supply and or 15 volt regulators..The rest are for amplifier section.Im guessing all except regulatos will be MOSFET transistors .If you are to replace them ..Stick to original parts..You can probably find these at mcmelectronics.com or mouserelectronics.com Just give then the numbers on transistors .Also make sure all other parts around shorted parts are okay before you install new parts..

Posted on Dec 09, 2007

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Posted on Jan 02, 2017

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My bx2200 cut off as soon as it was turned on and started smoking?


It sounds like the power supply transistors have failed. You'll need to pull the clamps and get the numbers off of the transistors. It's also possible that the 47 ohm gate resistors have failed. After removing the old transistors, you need to check the resistors individually.

Since you're new to repair work, read the following page.

Basic Repair Introduction

Post the part numbers if they are incomplete and you can't find the correct replacements. mouser.com is probably the best place to buy small quantities if you're in the US.

You also need to check the output transistors to see if any are shorted. If they are, the repair will be more difficult (especially if there is damage to the driver board).

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