Rockford Fosgate T600-4

The outputs were shorted in 1 channel .

I replaced the outputs and checked the source resistors gate resistors all check fine .

With the outputs in that channel it draws excessive current .

Are the A56,06 the drivers for the outputs on the main board or would the problem be on the driverboard for that channel most likely ?
 
Here are some pics of the board .

I will call Rockford after posting and see if I can get a diagram .
 

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