Casio CZ/ VZ/ FZ - Pro Series

I would add to the help Daniel has provided, to make sure you are using the absolutely correct power supply (volts, amps and polarity), as all CZs tend to be quite persnickety about proper power. Also make sure you have reset the synth.  I'm not sure about CZ-1s, but I know the 101s and 1000s have the reset button on the bottom of the case.
Good luck!




      From: "Daniel Forró danforcz@... [CZsynth]" <CZsynth@yahoogroups.com>
 To: CZsynth@yahoogroups.com
 Sent: Monday, July 4, 2016 5:35 PM
 Subject: Re: [CZsynth] CZ1 keyboard issue

    I have sent this answer to Vintage Synth group, still probably it didn't come, so once more here:
-------------------
Your description is not quite exact... I think it's you who should have an idea what happened :-) There's always some reason for such behavior.
One of them, for example, can be that if it was not in use for longer time period, maybe contacts are dirty or oxidized. I would reseat and clean all connectors as a first simple step. Focus on keyboard cables and connectors, I suppose there are some.
Sometimes after the long sleep it's good to leave the machine on for longer time - three days and nights, but keep eye on it and switch off again when you can't stay near it. 
Daniel Forro  




On Jul 5, 2016, at 4:15 AM, roberflas@... [CZsynth] wrote:


Hello,
I have a CZ1 , that was my first synthesizer , but one day I turn it on and if you touch any key , it sounds a very high note and hold on , if you play more keys it adds up but with high notes.
Some keys sound with erratic tune and the other keys sound with high tune and stay hold on after the key is depressed until power off the synth.
 If you play throught MIDI , all is correct, all notes , program change , etc.
Anyone have any idea what can happen ?.
Thank you in advance