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#2292573 - 06/20/14 01:40 PM Kawai CL35 key repair (Advanced Hammer Action IV)
Marcos Daniel Offline
Full Member

Registered: 06/07/13
Posts: 189
Loc: Punta Alta, Buenos Aires, Arge...
After five years of faithfull service, my Kawai CL35 had his first issue. The problem was a sticky key, at first I thought it was due to a fail in lubrication (I live in a very dusty region).
Then a click sound showed up and started to get louder and louder. So I decided to open the DP and see what was happening.

I'm not a big photographer so the pictures I took are not good at all, but perhaps can help someone else.
After removing every screw I saw, I could open the unit, (and understood that only a few ones were necessary). Keys are mounted by pressure, so it is not very hard to remove them.

I discovered that the key strikes the hammer not directly but through some kind of polymer that works as shock absorber, this little piece of gum, (porous plastic, or whatever it is) has adhesive on both sides and is covered with a harder plastic ribbon not to being erosionated by the direct impact of keys.

Perhaps due to intensive use (?) this protectign strip migrated, leaving the softer material exposed to all my virtuosity.

As I have no way of getting parts from Kawai (in fact I did not try... James?) I decided that the best option was to stick the damping piece of gum in other position and put the protecting plastic in the correct place.

Keyboard:

Action:

(this one of course, is taken from Kawaius.com)


Worn little-part-of-action-I-don't-know-its-name:
(notice the displacement of the transparent piece of plastic, and the dust)

'Repaired' hammer

Now the click has gone, the key repeats as fast as any other, and I hope it will last some time...
This is all, forgive my poor English!

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#2292592 - 06/20/14 02:23 PM Re: Kawai CL35 key repair (Advanced Hammer Action IV) [Re: Marcos Daniel]
peterws Offline
3000 Post Club Member

Registered: 07/21/12
Posts: 3870
Loc: Northern England.
Impressive looking keys there. You`ll be glad to know you can make that repair again now when you need to. When you get to repair no. 44, time to sell up . . . .
_________________________
"I'm playing all the right notes � but not necessarily in the right order." Eric Morecambe

""

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#2292656 - 06/20/14 05:27 PM Re: Kawai CL35 key repair (Advanced Hammer Action IV) [Re: Marcos Daniel]
cub Offline
Full Member

Registered: 11/25/12
Posts: 35
Wow - what an impressive repair job!
I read another user who swapped keys from the middle with the top and lower most keys which are used much less in every day playing.
Did you dust out the rest of the keyboard while you had it disassembled?

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#2292720 - 06/20/14 07:41 PM Re: Kawai CL35 key repair (Advanced Hammer Action IV) [Re: Marcos Daniel]
Kawai James Offline
9000 Post Club Member

Registered: 09/06/07
Posts: 9675
Loc: Hamamatsu, Japan
Great job on the fix. wink

James
x
_________________________
Employed by Kawai Japan, however the opinions I express are my own.
Nord Electro 3 fan & occasional rare groove player.

"Richard, none of us could forget you have a CLP-990." - EssBrace, 2014

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#2292725 - 06/20/14 07:52 PM Re: Kawai CL35 key repair (Advanced Hammer Action IV) [Re: cub]
Marcos Daniel Offline
Full Member

Registered: 06/07/13
Posts: 189
Loc: Punta Alta, Buenos Aires, Arge...
My original idea was swapping the problematic key, E flat 5,with B flat 7, because I never use the last three keys, but being a graded action I was not sure it would be a big idea.

And I didn't make any cleaning at all because I don't have time right now, perhaps the next time, but if I do so, I must find out which lubricant is used because most of the dust is on the grease, if I clean the dust, I remove the lubricant.

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#2292738 - 06/20/14 08:19 PM Re: Kawai CL35 key repair (Advanced Hammer Action IV) [Re: Kawai James]
Marcos Daniel Offline
Full Member

Registered: 06/07/13
Posts: 189
Loc: Punta Alta, Buenos Aires, Arge...
Thank you James!
I will contact the local dealer asking if those parts are avaiable, just in case...
What do you think?

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#2292739 - 06/20/14 08:23 PM Re: Kawai CL35 key repair (Advanced Hammer Action IV) [Re: Marcos Daniel]
Kawai James Offline
9000 Post Club Member

Registered: 09/06/07
Posts: 9675
Loc: Hamamatsu, Japan
I think it's well worth trying, however please understand that the dealer/distributor is under no obligation to provide or order the parts you request.

Kind regards,
James
x
_________________________
Employed by Kawai Japan, however the opinions I express are my own.
Nord Electro 3 fan & occasional rare groove player.

"Richard, none of us could forget you have a CLP-990." - EssBrace, 2014

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#2292747 - 06/20/14 08:34 PM Re: Kawai CL35 key repair (Advanced Hammer Action IV) [Re: Marcos Daniel]
Marcos Daniel Offline
Full Member

Registered: 06/07/13
Posts: 189
Loc: Punta Alta, Buenos Aires, Arge...
I understand that, and that is an old keyboard, and perhaps this one is a very unusual failure.

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#2363360 - 37 minutes 28 seconds ago Re: Kawai CL35 key repair (Advanced Hammer Action IV) [Re: Marcos Daniel]
laerub26 Online   content
Junior Member

Registered: 12/18/14
Posts: 1
hi everybody,
i have a CL35 with a key that isn't working. at first, it would just keep playing the note even after the key was released, but now it just doesn't make any sound. i tried the method presented in this thread, which didn't work, so then i switched the faulty key with another, and the problem is still here.
any idea on how to fix a non working key ?
thanks in advance

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