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Pete, Engineer
Category: Electronics
Satisfied Customers: 17381
Experience:  Over 16 years of experience in the Electronics and IT industries.
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Yamaha CP33 stage piano. C# ***** G keys at the upper end

Customer Question

Yamaha CP33 stage piano.
C# ***** G keys at the upper end have stopped sounding.
Submitted: 1 year ago.
Category: Electronics
Expert:  Pete replied 1 year ago.
Hi Tom,This will happen when the electronic contacts under the keys no longer make good contact.You can try blowing compressed air under the keys to help temporarily dislodge any dust or dirt, however the best long term solution is to have the keyboard professionally cleaned by disassembling it and cleaning the electronic contact areas under all of the keys.
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Customer: replied 1 year ago.
Hi PeteI'm not sure exactly what you mean by blowing compressed air under the keys, as I can't access this without disassembling the whole keyboard.Also, surely the fact that the issue has affected certain octaves rather than random keys suggests that there is somethething amiss with the circuitry rather than dirt under individual keys?Any thoughts or comments would be appreciated.Thanks in advance,Tom
Expert:  Pete replied 1 year ago.
Hi Tom,
As a quick fix, you can try spraying compressed air through the small gaps around each key; it may be enough to force any debris off the electronic contacts and get those keys working again.
If entire octave keys are affected, then it could be that something was spilt on the keyboard, or the electronic contact strip below the keys is faulty, or there is a loose wiring connection somewhere. A closer examination inside the keyboard would help determine if anything is amiss.