Well, i finally got around to replacing the logic IC's in my mkII and the whole 'DCO's not working' problem came down to a dead 40H074 at IC17. It seems that neither DCO will sound at all if either CLK signal to the MSM5232 isn't working, which is odd as i would assume that each DCO has its own dedicated CLK signal. Everythings working fine now it appears. Thanks for peoples help.
Message
Re: problem with MSM5232 DCO outputs
2009-07-28 by crustypaul