Fan issue Adcom GFA-5800 bias too high?

ben62670

Member
2006-12-27 7:58 am
Hey guys. I am having a cooling issue with a GFA-5800.
I am helping a friend out, and here is what he has reported.
"After being on about 20 minutes my right fan header measures 3.8v and the left is 3.2. At this point neither fan shows any signs of life.
I'm not sure what the bias procedure is for this amp, but measuring across R64, I get 45mv on the right and 56mv on the left."
Thanks
Ben

Anyone have the service manual?