Rodec PA2400 amplifier cooling fan issue

Hello, I have a Rodec PA 2400 poweramplifier. The cooling fan of channel 2 doesn't work anymore, even if this channel still amplifies the sound. Of course you'd first suspect the fan itself...but it doesn't receive no power anymore. Before opening the whole amplifier I'd like to consult the electric diagram/data sheet. Does someone know where I could find it? Thanks a lot