Onkyo stereo receiver TX8500 Mkii
I recently acquired an Onkyo TX8500 MKii stereo receiver and would like to find a user/instruction manual (Part #29340277). I downloaded the service manual however it doesn't explain how to use the radio station presents, the locking switch, etc. Additionally, there is an "EPS" on/off switch on the front and "EPS" in/out jacks on the back that I don't know anything about. Can somebody provide information?