RCf hdl20a amp

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Hi all

I need some help here. I am repairing some RCf hdl20a amp modules. The box is two way. The low sides are damaged. Changed mosfets irf4229 and driver ic irs20955s. Used irs 20957 as I cannot get the 955. U it plays for about 10 mins and the.n one MOSFET shorts out? Is there any modifications to be done when replacing the 955 with the 957? Anyone has a schematic for these amps?

Thanks in advance

Trevor
 
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