Casio CZ/ VZ/ FZ - Pro Series

There are 'flat flex' cables going from the keyboard scanning board (right under the key board ) to the main board. Be sure to check those. Careful, they are very fragile. Also, maybe check the little many pin flat pack IC for contamination shorting some of the pins.


Bill


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---- "roberflas@... [CZsynth]" <CZsynth@yahoogroups.com> wrote: 


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Hi, thanks to all, for your reply, 
Ok, the battery is for replace in this moment, but i do a reset at power on time, to obtain the factory settings.
On the other hand, I do all checks for contacts of the keys and continuity for traces in printed board.
Anyone tell me that this issue may be caused for one or some diodes of the key matrix.
I will do a test of all diodes, there is 122, two for each key.
regrads