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.
Message
Vco offset voltage
2012-10-29 by ohmstudiste