Casio CZ/ VZ/ FZ - Pro Series

I've not experienced it - but I have worked on an AZ1 and the basic architecture of how to scan the keys is very similar. In the 101's case though it seems the CPU uses a 74154 - which sounds like it might be the source of the problem.


http://r-massive.cellarseer.com/casio-cz-101-keybutton-repair-guide/


LEE

      From: "Brendan Cooney cooneypiano@... [CZsynth]" <CZsynth@yahoogroups.com>
 To: Yahoogroups <czsynth@yahoogroups.com> 
 Sent: Tuesday, 24 July 2018, 16:58
 Subject: [CZsynth] no buttons working on my CZ101
   
    My trusty CZ101, which I use all the time in my studio, seems to have taken ill. Suddenly this morning, upon powering up, none of the buttons work at all, meaning that I have stuck on Preset 1 and cannot change programs or perform any other task. Keys, pitch bend, volume and outputs all are working fine. Anyone in this group ever experience this before? Is there a fix or is it time to get a new CZ (again)?
Brendan