HELP! Garbled sound from my DX7 mark I
- Does anybody have ideas or tips about the following?
After 4 years I fired my DX7 up to see if it's still working.
The battery check showed me an astonishing 4,5 Volts.
All sounds were still there but when I hooked it up to the amplifier
I only heard some soft noisy sounds slighty resembling the orignal
sounds, the headphone output gave the same sound.
I removed the battery and leaved it for a few days, then I put the DX
back on the mains and found garbled memory info, so far so good. I
copied the complete databank from the rom cartridge to the internal
memory, everything worked fine but the sounds didn't improve and
stayed the same.
The next thing I did was to do an Init Voice and select algorithm 32
and test the seperate operators. They all work but don't output a
sine but some other garbled noise. I can alter the frequency and hear
go up. So my conclusion is that there must be something wrong in the
amplifier part of the DX.
I also performed the internal test, but since I have a version 1.8 OS
(with the improved MIDI implementation) it doesn't do all the steps
as published in the manual and Internet.
All tests are OK, but additional to that one should measure with a
scope on certain IC ports to see if the correct wave is showed within
some boudaries. I don't have a scope...
This is the story, any ideas?