Casio CZ/ VZ/ FZ - Pro Series

- Check batteries, put them off and check if they didn’t leak inside after the time the instrument was not used. If yes, you have to clean all, and check if something more inside was not damaged. Try to switch on the instrument without batteries inside (they just keep memory contents). Probably batteries are dead after long time, so anyway you lost RAM contents. I'd suppose

- Put power cable off the socket, and move more times with voltage selector, return it to the voltage used in your country, connect cable and try to switch on again. Maybe it’s dirty or oxidized contact.

- Check all four fuses inside PSU for continuity. There’s one TF (thermal fuse?) probably hidden inside the transformer, hopefully it’s OK - check the primary transformer coil with ohm meter for continuity.

- When instrument is on, measure if PSU voltages are on spec.

- Leave the instrument on for few hours, maybe it needs it if it was not used for long time. But stay near and watch it, if any problem occurs (smoke or so), switch it off.

- Initialize the instrument with Initialize button as described in the Service manual.

- Re-seat all connectors inside, maybe some contact is oxidized. Also IC’s in sockets…

Good luck!

Daniel Forro


> On Sep 14, 2018, at 1:10, Les Morey moreylc@... [CZsynth] <CZsynth@yahoogroups.com> wrote:
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> 
> 
> Hi all, I've got a CZ-5000 that I've had for decades, but haven't used it in quite a while, although it's been in my climate controlled studio.  I went to turn it on, and no response, no LCD indications, no lights, nothing.  I have very limited electronics skills but a decent sense of adventure, any suggestions for things to try?  (I've already tried the obvious different outlets/power cords).  I haven't taken it apart yet at all.
> 
> I hate to see it go, but if I don't have any luck I might take it over to Syntaur (I'm a couple of hours from them) and see what they'd give me for a dead CZ, with the hope that they would eventually fix it and let someone else enjoy it.
> 
> Thanks for any suggestions--
> 
> 
> 
>