Question about Yamaha Full-Size Keyboard

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Yamaha digital piano clp 170

One of my piano keys is making a loud note when played (louder than the rest) - I suspect there maybe some sort of dirt on the contact beneath the key- is there any way I can fix this myself rather than spend a fortune getting someone in?

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  • roseortega Sep 05, 2008

    I have the same problem just instead of one I got three notes that sound loud

  • michaelzebro Sep 10, 2008

    I also have a few loud keys....sounds like a bad hammer hitting a string on a conventional piano. This situation just appeared after many years of playing the instrument with no problems. Do the weighted keys need some sort of periodic maintenance, and if so would this maintenance solve my loud key problem? Many thanks.

  • Anonymous Sep 22, 2008

    I have PSR 9000 in very good condition,but I have the same problem with one key,it sounds louder.It seems the dust or some kind of uncleaning problem.

  • fairbairn Feb 21, 2009

    Hi we have keys sticky and staying down on CLP170. Help with any ideas. contact Brian at fairbairn@xtra.co.nz

  • skidaddytn Mar 24, 2009

    Fixing a buddy's CLP-123 which has sat broken for years. Only half the keys actually worked. Same problem... I got the entire thing apart and cleaned the circuit board contacts with WD-40 and attempted to clean the rubber strip as well (with wd-40 again-- hey i'm cheap) but the cleaning did not help much on the rubber/silicone... I can still see it is imperfect. After my cleaning, however, only 8 keys fail to function... better than half not working, but if you can't get all of them, who cares anyway? on this model, you can turn the keyboard upside down once you take it out of the piano and you don't need a dowel, you can just remove the boards easily.

    I think these rubber strips are meant to be replaced when they get bad... I'm not sure that any product could clean the one in this unit.




  • Anonymous May 11, 2009

    i have a portable yamaha keyboard, and the key when pressed has max volume over against the other keys. i then noted that yamaha uses rubber boots with contacks inside. so then i moved the rubber boot strips around and noted that the problem followed a given strip.

    however i dont know if i can just buy new rubber strips.

  • Jon Bruce
    Jon Bruce Nov 04, 2013

    I also have three notes that are bad, and one other is going. Use a philip's screwdriver to take it apart, that's what I'm doing.

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This is a common problem with Yamaha keyboards. The problem is caused by worn-out rubber contacts in the keyboard assembly. In my old Clavinova CLP-500, there was one long rubber contact strip under the keys with two parallel strips of semiconductor material. The Clavinova circuitry determines key velocity by measuring the timing between when the key hits the first and second strips of semiconductor material. The harder you play a key, the less time it takes the key to hit the second semiconductor strip after hitting the first.
After years of playing the keyboard, the keys eventually cause tears in the semiconductor material and this messes up the timing measurement for key velocity. The only solution is to take the keyboard apart and replace the rubber contact strip with a new one.
I got rid of my CLP-500 four or five years ago and got a new CLP-170. The CLP-170 is now having exactly the same problem that the CLP-500 had. Yamaha has re-designed the rubber contacts in the CLP-170 so that there are now eight individual contact strips instead of one long one. The problem is essentially the same, though. You have to take the keyboard apart and replace the worn out rubber contacts.
Here are the part numbers for the rubber contacts that need to be replaced in the CLP-170: V8286600 Rubber Contact, 12 keys, D-C#   Qty. 6 V8286800 Rubber Contact, 11 keys, A-C#   Qty. 1 V8286700 Rubber Contact, 5 keys, D-C   Qty. 1
I suggest you also get a copy of the CLP-170 service manual, part number 001677. It has descriptions of all the steps necessary to take the thing apart and put it back together again. You'll also need a "rod" (which is just a long dowel), part number TX000670. Before you take the circuit boards off the keyboard assembly, you have to insert the dowel between the keys and the frame to keep the keys from falling back and getting in your way. A 5-foot long 1/4-inch dowel will probably work. (I haven't yet taken apart my CLP-170, and I don't have Yamaha's "rod," so I'm not sure if 1/4 inch is the right size or not. I'll report back here if it's not.)
Good luck, Howard

Posted on Sep 27, 2008

  • Merv
    Merv Nov 02, 2011

    thanks man, my clav 170 is doing the same so lloks like i'll have to change mine.so a quick clean air spray between the keys wont do then? i bought mine from new 6 years ago. where is the best place to buy the part? i live in brighton england

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As a Yamaha warranty service technician for over 10 years, I can assure you that WD40 is NEVER good for vinyl contacts and there is no semiconductor material, save for the diodes, on the key contact assembly. Take preceding advice with a grain of salt, there people seem to be quite ill-informed.

Posted on May 07, 2013

  • mckimani Aug 26, 2016

    WD40 SHPULD NEVER BE USEDTO CLEAN YAMAHA CONTACT BOARD OR RUBBER CONTACTS.

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1) Clean the circuit board contacts under the keys (where the strip hits). Use wd-40 first (for possible rust), then soap and water (for sugars--don't soak the thing though), then follow up with rubbing alcohol (to remove moisture)
2) Replace the rubber strip. (You will need to order this part from a Yamaha dealer). I tried cleaning this, and was able to get every key working again (by themselves), but it the strip wears down and you will get random notes when you play CHORDS. Ended up having to replace it. Now its 100% working.

Posted on Apr 10, 2009

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TORN RUBBER CONTACT,OR DUST, CLEAN OR REPLACE THE RUBBER CONTACT

Posted on Aug 26, 2016

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Me too. I thing I have to open the piano somehow and clean something inside or under the keys

Posted on Sep 13, 2008

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What is your piano brand and type?
Damage to the contact rubber can cause note plays loudly or,
note does not plays at all.
It is caused by:
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key-b2-playing-loud-not-touch-wy0wtjmd43l3of51yru11dct-4-0.jpg

2.
Contact rubber is torn (your case). If this happen,it can not be repaired or glue. So, you have to replace one octave.
The yellow arrow indicates the side that is often torn.
key-b2-playing-loud-not-touch-wy0wtjmd43l3of51yru11dct-4-1.jpg

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key-b2-playing-loud-not-touch-wy0wtjmd43l3of51yru11dct-4-3.jpg
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