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#2867418 - 07/17/17 09:47 AM Yamaha CP4 key guide cap problems
bluesharpbob Offline
Member

Registered: 12/09/12
Posts: 6
Loc: suffolk county,New York
Figured I'd throw this out there to see if any other CP4 owners have had this problem. Love the keyboard , but some time after I'd been using it for a while a few black keys became wobbly- for lack of a better word. They still worked, but they moved back & forth a bit annoyingly. I thought that I had broken the keys somehow so I ordered replacements from Yamaha. After receiving them & opening the piano up to replace them ,I found out the keys weren't broken after all- it turned out a little rubber piece that sits on a plastic post under the key I believe is called a guide cap had become dislodged & had fallen under the key.This happened to three black leys - no problem at all with the white keys. The part looked fine, I put the three of them back & the keys were working perfectly again, but after playing a while a Bb key became shaky & I guess the piece became dislodged again. Anyone else out there run into something like this, or am I just lucky?

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#2867421 - 07/17/17 10:00 AM Re: Yamaha CP4 key guide cap problems [Re: bluesharpbob]
Bobadohshe Offline
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Registered: 12/25/06
Posts: 5552
Loc: San Diego / Los Angeles
It happened to a bunch of my CP4 keys. I had several wobbly black keys as well and was bummed. One day I had the board worked on for other reasons and the tech after completing my other work explained about these guide caps and how he'd reseated them at no charge. I think that since then I've had a couple wobbly keys return or possibly some new ones show up.
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#2867427 - 07/17/17 10:33 AM Re: Yamaha CP4 key guide cap problems [Re: Bobadohshe]
WesG Offline
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Registered: 02/16/13
Posts: 2789
Loc: Inverary, ON, Canada
I had some wobbly black keys due to accidental abuse. Kenheeter is my local tech and he had everything working perfectly by the time he put CP4 in its new chassis. No problems since.
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#2867435 - 07/17/17 11:02 AM Re: Yamaha CP4 key guide cap problems [Re: WesG]
Jazz+ Offline
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Registered: 05/15/04
Posts: 5413
How are they seated? Perhaps they should be seated with rubber cement?

My experience with Roland in Kawai digital pianos led me to discover that the vertical plastic guide posts have pink or white silicone grease wiped on them to keep them quiet and that overtime the grease slides down the vertical guide rails and the keys begin to clack noisily.
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#2867475 - 07/17/17 12:29 PM Re: Yamaha CP4 key guide cap problems [Re: WesG]
davedoerfler Offline
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Registered: 12/27/12
Posts: 5960
Loc: thin ice
Originally Posted By: WesG
Kenheeter is my local tech


Lucky you, Wes. thu
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#2867636 - 07/18/17 10:48 AM Re: Yamaha CP4 key guide cap problems [Re: bluesharpbob]
bluesharpbob Offline
Member

Registered: 12/09/12
Posts: 6
Loc: suffolk county,New York
Somewhat comforting to know I'm not alone ! LOl I guess I'll try putting glue or rubber cement on the one that fell off again as someone suggested, can't see how it could hurt & it sure beats removing all the screws to open the sucker up every time it happens! Seems like this is a bit of a design flaw.

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#2867646 - 07/18/17 12:13 PM Re: Yamaha CP4 key guide cap problems [Re: bluesharpbob]
PianoMan51 Offline
Gold Member

Registered: 02/02/10
Posts: 810
Loc: SE NC marsh
I've been putting off opening the case to address the two black keys that wobble on my CP-4. Was afraid I'd open up a can of worms instead.

Thanks for posting this!

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#2867672 - 07/18/17 02:19 PM Re: Yamaha CP4 key guide cap problems [Re: PianoMan51]
bluesharpbob Offline
Member

Registered: 12/09/12
Posts: 6
Loc: suffolk county,New York
Good luck, it's a lot of freakin' screws! If you've never done it before, here's a link to a video of how to pop the keys out- he's working on an s90 but the cp4 keys come out the same way. You have to remove the white keys on either side of a black one to get the black key out.
https://www.youtube.com/watch?v=p8xM2H5EyfM

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#2867687 - 07/18/17 03:10 PM Re: Yamaha CP4 key guide cap problems [Re: bluesharpbob]
PianoMan51 Offline
Gold Member

Registered: 02/02/10
Posts: 810
Loc: SE NC marsh
Thanks!

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#2867714 - 07/18/17 05:11 PM Re: Yamaha CP4 key guide cap problems [Re: PianoMan51]
Pete the bean Offline
Senior Member

Registered: 12/30/11
Posts: 43
Loc: Canada
Yamaha replaced my whole keyboard 3 years passed warranty expiration on my Cp1 a few months ago because of guide caps coming off. I had the problem repaired twice under warranty. The problem became more frequent after the warranty expired so I was opening up the keyboard once or twice a month. That is a heck of a lot of screws to undo and keep track of.
The caps only came off of black notes. The caps on the white notes all click into place. None of the black notes click onto the key guide.
I greatly appreciate the excellent customer service provided by Yamaha Canada.


Edited by Pete the bean (07/18/17 05:14 PM)

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#2867718 - 07/18/17 05:34 PM Re: Yamaha CP4 key guide cap problems [Re: Pete the bean]
ElmerJFudd Offline
MP Hall of Fame Member

Registered: 11/30/14
Posts: 4842
Loc: USA, greater NY area
That's Yamaha doing the right thing. Which I find they are usually good about... even if you go to a Yamaha certified repair shop - when they call it in, Yamaha usually says it's a go to do the repair as a warranty job. Of course, particularly on their higher end stuff.
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#2867744 - 07/18/17 07:45 PM Re: Yamaha CP4 key guide cap problems [Re: ElmerJFudd]
burningbusch Offline
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Registered: 10/22/00
Posts: 7415
Loc: Ghost Planet
Originally Posted By: ElmerJFudd
That's Yamaha doing the right thing.


That's true. There have been numerous examples given over the years of Yamaha going beyond, sometimes well beyond, the warranty period to fix issues. But the CP-1 came out 7.5 years ago and this appears to be a fairly regular problem across the CP line that they have yet to properly address.

Busch.

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#2867749 - 07/18/17 09:02 PM Re: Yamaha CP4 key guide cap problems [Re: burningbusch]
gg22 Offline
Senior Member

Registered: 08/03/14
Posts: 56
That's true - Yamaha replaced motherboard in my 1997 AN1x for free in 2015 - 17 years after warranty expiration.

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