Denon DNX800 schematic needed

[HDSarge]

Looking for the schematic for a Denon DNX800 DJ mixer. There is excessive hiss in the right channel output of this mixer. The hiss can be controlled from one of the channel faders. No other control on that channel has an impact on the hiss.
Any help would be appreciated.

[g1]

Not very legible, but might help, service manual for DN-X800 :
Denon DN-X800 Service Manual Pdf Download

[HDSarge]

Thanks g1 that was very helpful, got me to the right op amp.