First of all congratulations to all Syntaur team for this forum and to all the synth community worldwide.
I am writing from Portugal to know if you can help me with a issue with a Yamaha EX5. The synth was give to me to repair after a friend of mine tried to replace one broken key and not complete the job with success and knowing that I could complete the job due to my knowledge mostly in vintage 70’s and 80’s synths repair.
Well, the synth was give to me with some missing screws, and most of the plugs inside disconnected.
I have replace the broken key, connected the plugs, replace the battery and restore the factory with disquette.
The ex5 powers up, but no sound on the LR outs and phones. Run all the service manual factory tests and all gives ok messages, although there’s no audio 1khz output in that specific test.
The only sound I can hear is a little ‘scratch’ sound when I turn up and down the slider volume.
I suspect something wrong with the jack board (JKDA). Any ideas for what possible could be wrong to start my debugging since these machines are normaly built like tanks ??