my 777 only has 1 woofer working both the mid range are ok, tried cleanig all pots and switches, can anyone help, thanks
Don't forget your external speaker plugs, if they aren't making good contact inside you will lose an entire channel.geoffhartwell said:cleaned with contact cleaner, yes did the super woofer pots.
that balance didnot work at all, cleaned pot . then it worked
but not the left woofer
I'm guessing you removed the knobs before spraying the pots. I would say that if you are getting faint or muffled sound from the woofer, it would be a dirty super woofer pot. I had that problem with mine and it took several sprays and wiggling over a period of time.geoffhartwell said:cleaned with contact cleaner, yes did the super woofer pots.
that balance didnot work at all, cleaned pot . then it worked
but not the left woofer
Yes. The GF-777 has 4 amps via (2) x stereo amps. Each amp module powers either the midrange/tweeters or the super-woofers. Each one of the amp modules can blow a channel separately as well. Try blipping the speaker terminals with a small penlight battery (unhook the wires first). You should get a crackling sound from the speaker. If you get nothing, then it's almost certainly the speaker. If yes, then sounds like the woofer is OK and it could be the amp, provided you've already checked all the obvious such as loose or disconnected connectors, etc.geoffhartwell said:im getting nothing from the left woofer, but i do get sound from the left mid range, could this still be the ic chip ?