Kicker CXA600.5 AOT412 heating up help

[rhempz01]

I have repaired alot of components and the power supply on this unit already. IC8 burned 1/2 of its pads off so i had to repair it. The power supply is working.
I changed the IRS20957S and both of the aot412 were short. I replaced them both. When i attempted to power up the amp, it started normally then protection shut off, yet q501 heats up and shorts fast.

 

[rhempz01]

the 2r2 are all out of tolerance not sure if that was my issue or not. i do not have that value in that package size

 

[PapaZBill]

R29-32 2.2 ohm 2010 SMD 5%

 

[PapaZBill]

Check the gate resistors R562,568-10ohm, R561,557-4.7 ohm. Check C543,544,545,542.

 

[rhempz01]

all of the gate resistors and smd capacitors test good. So mounted the amplifier in the heat sink, and tested for audio. Everything tested good. All channels full Audio. Seems that those aot412 just run hot unless mounted t ok the sink, even then the case gets warm at idle.

 

[PapaZBill]

I'm not sure there is a remedy for this. If everything else checks out and the amp doesn't run excessively hot it should be fine

 

[rhempz01]

i figured this as well, and just buttoned it up. I have another unit on the way in.