Hello,
i got a problem on my X68000 CZ-600C with the Volumecontrol for the Headphone jack / internal speaker.
The sound seem to play on full volume and i can´t get it quieter.
Any idea what this issue is ?
Volume pot appears to be broken. You'll have to get the system apart enough to get the bottom board out and check the leads of the volume pot with a multimeter. See if they change values with the knob set at different positions.