Is there anyone out there that has experience
troubleshooting problems with the Prophet 600, specifically the digital side of
things?
I have a broken Prophet 600 that powers up. I get
no sound out of it, and "gibberish" on the numerical readout. With the standard
eprom in it it doesn't even really respond in any discernable way to pressing
any of the keypad numbers.
I have the diagnostic eprom from Wine Country,
which also does not act as expected although with the Diagnositc chip in the
keypad does produce reproducable results, or in other words, the
"gibberish" changes in a systematic way when I press the membrane
keypads.
So I am assuming that whatever is wrong with this
is mostly on the digital side (I think....). Of course, I am not so good with
digital stuff (though I do have a logic probe, and a scope, etc.)
Any thoughts, or anyone out there willing to give
me some hints, or maybe tell me some more directed things to try?
Also, is there any way to kind of "bypass" the
digital side, to just get a sense that the "analog" side is working properly (I
see the waveforms I think I should see on the appropriate pins on the Oscillator
chips so I THINK they are good....
-brendan