Casio CZ101 shuts down after about 1/2 hour

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Casio CZ101 shuts down after about 1/2 hour

Postby robphys » Wed Apr 11, 2018 3:02 pm

Hello
Recently picked up a cheap CZ101 that works well for about 1/2 hour but then shuts off. Suspect it something overheating somewhere. Have checked inside - no corrosion or obvious issues like bust caps.
Anyone had this issue before or could advise on fixing it?
Cheers
Rob
Novation Supernova II, Yamaha EX7, Kawai K4, Emu ESI32, Roland JV1080, Casio SK5, Yamaha VSS200
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Re: Casio CZ101 shuts down after about 1/2 hour

Postby Rasputin » Wed Apr 11, 2018 9:59 pm

More info needed.

- Is this on batteries, AC only, or both?
- Is this after a "cold" boot only? Is the time before shutdown less when it's already been used?
- Can it be turned on immediately after and come back?
- Does it shutdown right in the middle of being used or only when not touched for a while?
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Re: Casio CZ101 shuts down after about 1/2 hour

Postby robphys » Wed Apr 11, 2018 11:54 pm

More info needed.

- Is this on batteries, AC only, or both? - BOTH
- Is this after a "cold" boot only? Is the time before shutdown less when it's already been used? Remains about the same
- Can it be turned on immediately after and come back? Yes
- Does it shutdown right in the middle of being used or only when not touched for a while? In the middle or left alone

Hope that helps - your reply is much appreciated
Rob
Novation Supernova II, Yamaha EX7, Kawai K4, Emu ESI32, Roland JV1080, Casio SK5, Yamaha VSS200
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Re: Casio CZ101 shuts down after about 1/2 hour

Postby Rasputin » Thu Apr 12, 2018 4:06 am

I'm thinking it could be a couple things...

The CZ-101 is designed to time-out after about 6 or 7 minutes of inactivity. Could be that this is malfunctioning somehow. Try turning the APO switch to 'Off'.

The CZ-101 also has a low battery power-down failsafe feature to protect its memory. If it detects a voltage that is too low then it will attempt to avoid draining the batteries any further by turning off. This can be calibrated with internal trim-pots, but it's also possible the batteries are low and there is a problem with the AC adapter being intermittent. So, if the batteries are low and the AC adapter is loose or otherwise flaky, as soon as it tries to power from the battery only, it may be shutting down. Try turning the Protect switch to 'Off'.

How fresh are the D batteries, and is the AC adapter the stock one, or something random? The CZ-101 can be a little particular with the AC adapter that's used because aftermarket/generic adapters that seem to fit might have a slightly different barrel size which causes a tiny amount of play, just enough so there's not a rock-solid connection.
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Re: Casio CZ101 shuts down after about 1/2 hour

Postby robphys » Sat Apr 14, 2018 8:04 pm

Thanks for the info Rasputin - I'll have another look/try
Cheer
Rob
Novation Supernova II, Yamaha EX7, Kawai K4, Emu ESI32, Roland JV1080, Casio SK5, Yamaha VSS200
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