Korg Forums

[jorevf]

Hi,

I have manage to bring back an Oasys 88 from the afterlife..
Manage to repair the motherboard.

Anyway, new install, patched to 1.3.3a

Every now and then, it's like the sustain pedal kicks in and the tone lasts forever..

But no pedal is installed..
Just power cable and a head set.

Has anybody seen an behaviour like this before, if so, is there a easy cure?

Thanks in advance!
Regards,
Fredrik

[voip]

What sort of condition was the Oasys in before it was "brought back from the afterlife" and what repairs to the motherboard were necessary? What was its past history?

This sounds potentially like quite a bit of troubleshooting and there could be any number of causes, coming from hardware or software. It may be an easy fix, but no guarantees. Is there anything plugged into the USB port? Does the keyboard or any of the controls become unresponsive when the sustain gets stuck on?

The fact the problem is intermittent is encouraging, since it indicates the board can operate with sustain on or off, rather than being stuck one way or the other. When the sustain gets "stuck on" permanently, have you tried plugging in a sustain pedal, or even just a plain old jack plug? If that helps, it could be down to a bit of conductive contamination in the sustain pedal jack socket, or some sort of intermittent short near there. What was the condition of the internal wiring and interconnects inside the Oasys?

Does changing the program or combi a couple of times cause the sustain to turn off?

Is a software factory reset possible?

Lots of questions, but the answers should help to guide the path to a fix.

The only time I've had an issue like this was with a Kronos as a result of connecting two pad-type controllers to its USB ports. Either pad alone was fine. Removing the devices and power cycling with a 10 second delay between off and on cured that.

[jorevf]

[voip]

Excellent. A relatively easy fix.