audison lrx5.1k service manual

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hello, I need the amplifier audison lrx5.1k service manual, the same has problem in the preamplifier and digital channel (subwoofer), removing the preamp board, sub channel board and two irs20124s the amplifier turns on and remains on, placing the pre, it triggers all protection leds. if you provide the schematic of the preamp and digital channel already solves my problem, thank you.
Sorry for the english, I used the google translator.
 
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