I just spend a good part of the long weekend trying to fix my father's stereo system. He has an Adcom GFA-535 amplifier with a GFP-500 tuner. Yes, both are 20 years old. This system was just moved to the cottage, to replace an even older system (Yamaha receiver). Prior to the hardware change, there was a problem with right channel output - non existent. This problem was for both A and B speaker selections. I assumed the Yamaha receiver had simply died. The installation of the Adcom equipment did not rectify the problem.
So... I replaced all the speaker wire, assuming a break somewhere. Crawling through the attic, routing wires down through the walls, up through the basement (I was not a happy camper!). Same problem (Argh!).
I disconnected everything (CD player, cassette tape deck), thinking that something was not connected properly. No fix. Checked the polarity and connections to the speakers - no issues. I reversed the speaker connections - changing from right to left. Got sound from the left, but not the right. Disconnected the speakers too and listened to the headphone sound - left channel only.
I am discouraged. I think that this is a amp/tuner issue, but why did the same problem pre-exist in with the original Yamaha set-up? Could something with the speaker set-up blow something internally in the amplifier? I checked the fuses and they seem okay. What did I miss in my checklist?
So... I replaced all the speaker wire, assuming a break somewhere. Crawling through the attic, routing wires down through the walls, up through the basement (I was not a happy camper!). Same problem (Argh!).
I disconnected everything (CD player, cassette tape deck), thinking that something was not connected properly. No fix. Checked the polarity and connections to the speakers - no issues. I reversed the speaker connections - changing from right to left. Got sound from the left, but not the right. Disconnected the speakers too and listened to the headphone sound - left channel only.
I am discouraged. I think that this is a amp/tuner issue, but why did the same problem pre-exist in with the original Yamaha set-up? Could something with the speaker set-up blow something internally in the amplifier? I checked the fuses and they seem okay. What did I miss in my checklist?