Sticking Yamaha MO8 keys

by tom
(mount pleasant)

Some of the keys (all are weighted) on my Yamaha MO8 kind of stick. It is easy to get into the unit and to access the keys. What is the preferred method (besides taking it to an authorized dealer) for fixing this problem? How do you remove a key and lubricate/grease it? I assume that is what is needed? Thanks.

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Jan 07, 2012
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starstarstarstarstar 		Sticking keys
by: Tom

Don't be afraid to take tie MO8 apart. It is very logical. It's been a while since I went into mine but I remember thinking how easy it was. The main difficulty is removing the affected keys and I describe that above. start with the screws on the bottom . It hinges open so have something to raise the unit several inches from your working surface so that can hinge open. It will become obvious what I'm saying once you get started. Give it a shot. I had no training but after understanding how to get the keys out, I had no real difficulty. Good luck.
Jan 07, 2012
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starstarstarstarstar 		how to replace the felt pad
by: slavag

Hi there,I need some info for my Yamaha Mo8.I have 2 notes that the velocity seems to be going.IT's actually not completely gone :if I hit it very soft(it responds well),if I hit it hard(it responds well),however if I hit it with a "middle of the road force" it responds as if I hit it hard(randomly).I asked few of my friends and they said it either needs a good cleaning,or replacing a felt pad.Is there any videos that anyone knows of replacing the felt pad on Yamaha Mo8(on Youtube)?IS it a hard job?The main problem is that I'm in Dubai,performing at the moment,I can order parts,but fixing at the Yamaha Service Station is not an option,so have to do it myself.Any help would be greatly appreciated,thanx.
Jul 23, 2010
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starstarstarstarstar 		Yamaha MO 8 Sticking Keys
by: Alfred

Dear Tom: Thanks. You're far better than a qualified tech, and you are certainly a first rate technical writer. Not to worry, I've been fiddling with electronic repair work (and some keyboard work too) for more years than I will admit. I don't have any on-going keyboard repair projects, but your info is going straight into my file. I hope other Forum members will take note of the procedure you've described so clearly.
On the current list of posts there is a lady who has a problem with what I suspect is the felt suppressor strip and I will alert her to your kind entry. Keep well, and thanks again. Have a good evening.
Alfred
Jul 23, 2010
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starstarstarstarstar 		re: sticking keys
by: Tom

To remove a key once you have the keyboard open do the following: There is a little arrow near the attaching end. Use something like a butter knife to push down between the keys at that point. Then lift forward and up from the back. Make sure that the front of the keyboard has been removed. It should pull froward and out easily. Don't force it. This video is not the exact keyboard, but the keys remove in an identical fashion. It's titled, "Yamaha Clavinova how to replace the keys". Look around at similar links. Many of these keyboards appear to be made in a similar fashion. Hope this helps. Remember, you are on your own. Don't blame me if something breaks because I am not a qualified service tech. Good luck.
Jul 23, 2010
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starstarstarstarstar 		Yamaha Mo 8 Stiking Keys/Replace Felt Strip
by: Alfred

Dear Tom: Following my earlier post,I just returned from a quick sweep of UTube Videos with no success. Could I please trouble you for specifics as to the steps I should follow to find the right video? Thanks.
Alfred
Jul 23, 2010
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starstarstarstarstar 		MO 8 Sticking Keys
by: Alfred

Dear Tom: Your reply is fantastic. I'm going to U Tube after this post, and hope other members of thios Forum wqill do likewise. There was a recent post on a similar problem and I will check to see if your recommendation is applicable. Please make it a habit to visit this Forum. We need members like you! Thanks.
Alfred
Jul 23, 2010
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starstarstarstarstar 		Sticking keys
by: Tom

It turns out that the problem appears to be the result of somebody spilling a sticky drink into the keys. This keyboard has weighted keys and the "weight bar" which is connected to a key lands on a felt pad that is attached to the base. This dampens the key and reduces the noise of the key (specifically the weight) landing. This pad got sticky and many of the weights stuck to it. I cleaned the affected weights and it is better but because the drink saturated the pad, the weights just keeps getting stuck again. Not as bad as originally but it is annoying and makes for a non-uniform feel. Also, it makes more noise since some of the sponginess is gone. Bottom line, I ordered a new felt pad and I'm manning up to replace the existing one. There is a GREAT YouTube video showing how to take the keyboard apart and remove keys. I would have never guessed how to remove a key. Pass this on since it must be fairly common to drop a beer or soda into the keyboard. Thanks for the comment.
Jul 23, 2010
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starstarstarstarstar 		Yamaha MO 8 Sticking Keys
by: Alfred

Dear Tom: 1) Your guess re lubrication is as good as any, but what if you are wrong?
2) Your question as to "preferred method" MAY BE to blast the perimeters of the offending keys with (canned) compressed air, followed by a strong vacuuming, then a final treatment of just a tad of talcum powder applied with a dry water color brush. If (1) is wrong, you have to consider buying a Service Manual to avoid an authorized dealer. The contacts you need for Service Manual and Yamaha's closest Repair Facility are:
www.yamaha24x7.com and http://yamaha.com/yamahavgn/CDA/Service/Servi cerLocator/0,,VNM%3DLIVE,00.html
WE ARE NOT CONNECTED TO YAMAHA IN ANY WAY and the above is offered to any member of this Forum who may fdind it helpful. Good luck and thanks for your visit.

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