Looking for the circuit diagram/help for the STR-DE875 Receiver

Have been given a dead STR-DE875 Receiver that went through and fire (no heat damage) and hosing (water damage). The receiver sat for a week with water inside on the amplifier board. I would like to attempt to fix this and need a circuit diagram for either just the power amplifiers or the whole receiver. Presently I am trying to track down the original value for resistor R753 (and maybe why it would vapourize, heat burnout) in the power amp (Sub-woofer section I think). The other amplifiers don't have the extra circuitry this resistor sits in. Thanks, Steve

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