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YAMAHA RUBBER CONTACT VU 328400 - Yamaha Full-Size Keyboard

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Yamaha np 32 some keys faint in response


This is normally caused by dirty or worn contacts.
Simply open up the keyboard and replace the contact rubbers when the sensitivity has been lost.

There are 4 different rubber contacts depending on which notes are not working

WJ231101 RUBBER CONTACT 16N-2M OCT 2M-55
WJ231200 RUBBER CONTACT 16N-2M OCT 2M-45
WJ231301 RUBBER CONTACT 16N-2M 76H 2M-45
WJ231401 RUBBER CONTACT 16N-2M 76L 2M-55

Nov 12, 2016 | Yamaha Music

2 Answers

The third G key on my Yamaha YPT 300 does not cooperate with the touch response feature. Regardless of how hard I press it, it plays the note loudly. All of the other keys are fine.


Below the keyboard, there is a rubber contact (see figure 1).third-g-key-yamaha-ypt-300-not-cooperate-shyexoo0xcste5eq310zs3ot-4-0.jpg Damage to the contact rubber can cause:
- Note plays loudly or
- Note does not plays at all.

It is caused by:
1. Carbon rubber contacts dirty / dusty (yellow arrow). Clean with a pencil eraser (or cloth). Gently rub it.
third-g-key-yamaha-ypt-300-not-cooperate-shyexoo0xcste5eq310zs3ot-4-6.jpg

third-g-key-yamaha-ypt-300-not-cooperate-shyexoo0xcste5eq310zs3ot-4-10.jpg
2. Contact shredded rubber. If this happen,it can not be repaired or glue. So, you have to replace one octave as in Figure 1.
The yellow arrow indicates the side that is often torn.
third-g-key-yamaha-ypt-300-not-cooperate-shyexoo0xcste5eq310zs3ot-4-15.jpg

Sep 27, 2015 | Yamaha Music

1 Answer

I have ve a DGX 640. When the play the C, followed by D, the D is silent. It occurs also when I play the black key after its white neighbour.


Possibly a rubber contact switch problem.

Open up your keyboard if you feel confident about doing so.

Remove the rubber contact strip under the faulty notes and clear away any dust ( this can be a cause of the note not sounding ) Swap this rubber ( part 220 ) on attached picture with the one next door to it. If the problem has moved to the next octave then it is a worn rubber contact switch replace ( see link )

If not you will probably need to take to a repair centre as it may be more serious.
329a5027-9060-4f02-8bca-c9152438e9e2.jpg

Apr 03, 2014 | Yamaha DGX640 Music Keyboard

1 Answer

Looking for Yamaha QY100 RUBBER CONTACT V6556600


I have always had good luck buying directly from Yamaha part here in Canada. If the rubber boot is not broken. you can try to clean the contact surfaces if that is the problem.

Dec 21, 2013 | Yamaha QY100 - 24-Track Portable MIDI...

1 Answer

MY Yamaha psr 550 stopped giving sound after cleaning its buttons inside but the beats and other parts are working properly.only the keys are not giving out sound.please tell me how to fix this...


When cleaning buttons HOPEFULLY you did NOT use DeOxit or other contact cleaners like Blue Shower as these can damage the buttons that are conductive rubber.

The conductive rubber buttons should ONLY be cleaned with 99% isoprophyl alcohol and Q Tips. Both the conductive "pill" and the traces they contact on the circuit board should be gently cleaned with the Q Tip wetted with the alcohol.

If you used anything but the 99% isoprophyl alcohol, you can TRY cleaning properly and hopefully they will not have permanent damage.

Jul 15, 2010 | Yamaha Music

1 Answer

Replacing contacts on clp 170


Unless the rubber is worn, first try cleaning the contacts with 99% isoprophyl alcohol as well as the surface they contact.

Realize that conductive rubber contacts do NOT show real low resistance when closed... the electronic circuits they drive don't require low resistance. You may find resistance up to 1 K ohms.

Jun 13, 2009 | Yamaha Music

2 Answers

Keys stick on Clavinova CLP 360


A contact rubber for CVP-35, part number VS549800 will work, that's how I fixed my sensor problems on my CLP-360.

Jan 19, 2009 | Yamaha Full-Size Keyboard

5 Answers

Yamaha digital piano clp 170


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

Sep 03, 2008 | Yamaha Full-Size Keyboard

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