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#1565892 - 11/28/10 04:39 PM Digital pianos, keys sticking and excessive humidity
Didiman Offline
Junior Member

Registered: 10/18/07
Posts: 8
Loc: Australia
My Yamaha CP-300 has had problems with sticking keys whilst less than 3 years old. I live in an extremely humid tropical location at altitude which means much of the year is in blowing mist or rain.
Yamaha Music advice is that humidity does NOT affect lubrication of the keys and cause key sticking.
The technician who re-lubricated the instrument (it now works perfectly again) insists that humidity and mold growth DOES cause the lubrication to deteriorate.
Some thoughts please?
I am "off the electricity grid" (solar power) so cannot de-humidify the piano's environment so am I condemned to have the instrument re-lubricated every 2 years?

Should the re-lube be done only by a technician, or is it possible for a handyman with average skills to do the job at home? If so, are there instructions available and what sort of special lubricant is required?
Thank you for your advice and help.

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#1565916 - 11/28/10 05:27 PM Re: Digital pianos, keys sticking and excessive humidity [Re: Didiman]
ando Offline
4000 Post Club Member

Registered: 11/23/10
Posts: 4812
Loc: Melbourne, Australia
Wow, that's disappointing. One of the main selling points for digital pianos in a tropical climate is the freedom from the humidity problems that plague the acoustic piano. It had never occurred to me that a digital might suffer from similar problems. I'll be interested to hear the responses too.

#1566573 - 11/29/10 07:11 PM Re: Digital pianos, keys sticking and excessive humidity [Re: Didiman]
Ken Knapp Offline

Registered: 04/18/06
Posts: 2460
Loc: Pennsylvania
A forum member brought me a Yamaha digital that had sticking keys and it wasn't in a humid climate. I had to pull the action and lubricate the individual keys and then it was fine. I don't think a person with average skills would have a lot of trouble doing the job, although probably the first key you do will take a little figuring - but there are no adjustments to worry about. Key comes out, you lube it, and snap it back in. I use white lithium grease.


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#1566691 - 11/29/10 10:40 PM Re: Digital pianos, keys sticking and excessive humidity [Re: Ken Knapp]
Didiman Offline
Junior Member

Registered: 10/18/07
Posts: 8
Loc: Australia
Thank you Ken. Mine only had one seriously sticking key, but I could feel others going the same way so I had the whole keyboard re-lubricated. It feels as good as new now. Yamaha Music told me that the main reason keys need to be relubricated is because of dust and rubbish falling between the keys, and not humidity.

I think I would have a minor panic attack removing the first key for fear of breaking something, but if I need to I'll try it next time, and thanks for the information on which sort of lubricant to use.


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