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Class D Switching Power Amplifiers and Power D/A conversion

Planet Audio VX2200D
Planet Audio VX2200D
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Old 4th February 2010, 02:58 AM   #1
tdetlor is offline tdetlor  Canada
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Join Date: Feb 2010
Default Planet Audio VX2200D

Hello everyone! Im new to the site in hopes of a little guidence.
I recently shorted my planet amp out while moving my sub box. The output leads touched and dropped the amp into the protect light abyss.

Ive remove the amp and put her up on the test bench. opened her up and upon inspection, ive found no burnt traces or mosfets. Ive tested the resistance on all the outer legs of the output transistors. Everything checks out. Everything but one. On the opposite side of the amp there are a row of 10 transistors. marked

FB31N20D
1 R417H
E4 BB

9 of the 10 read 1141 ohms.
1 of 10 reads 0 ohms.

Before ordering a fresh batch of 10.
My questions would be.

Is there something else i should maybe check also? And if i dont check could result in some burning mosfets when i power it back up.

And lastly, where do you recommend purchasing a fresh batch?

Thanks guys

Tim
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