Hi,

I got a mp4 that I recently recalibrated and is working very nicely. Tuning/scaling is very good.
I checked all the voltage and got good and steady readings on the power supply and keyboard CV voltages.

But when it comes to measure the VCO offset in the klm398 I don't get the 0.000v +/- 1mv. Instead I read voltages bretween 1v and 3v and they change if I play notes on the keyboard. The voltages are responsive to the different VR on the board but I can't make them 0.000v.

So question are:
- Am I reading the good points i connected to J12 and to the respective 4 colour wires mentionned in the manual (and corrected here for new version)
- Is there a key to press while reading
- Is it dangerous for the OSC to have these readings As i mentionned my mp4 is really nice tuned and scaled, for every oscillators.