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Digital piano keys make a knocking sound when depressed

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

danforddan1
  • 192 Answers

SOURCE: Loose keys on my wonderful Technics digital piano

You would be very surprised of how few moving parts are in side one of these keyboards. There is no fix to the action,trust me. play the day lights out of it until it stops then get a new one. Have some fun and explore, if you find an old one that is shot, take it a part and you will see what I mean. These units are really a disposable instrument.
I hope this doesn't disappoint you . I hope it helped. Keep on rockin in the free world. DFD

Posted on Apr 13, 2009

  • 5603 Answers

SOURCE: I have a Roland HP 101 digital piano however certain dont sound

White spirit is NOT what you should use. Mineral spirit leaves a residue film.

Use 99% isoprophyl alcohol.

ALSO inspect the contactboard for cracks by candeling with bright light behind it.

Posted on Nov 01, 2009

Testimonial: "bur isnt it strange that certain keys have stopped working? ie most the A keys"

  • 74 Answers

SOURCE: roland hp550g digital piano has a couple of dropped keys

Power off the unit. Disconnect all cables that plug into the speaker base if you have one - It may be wise to document the individual wires to make their reinstallation easier. Remove the unit from the speaker stand and lay it on the floor on something like an old towel - you may get some dark colored grease on the rug. Remove the screws only for the bottom rear, not the front - you don't need to remove them. Do this by gently turning the unit upside down. Only remove the screws from the sides/rear bottom, and note which screw types you removed from where. Once all bottom rear screws are removed gently return the unit right side up. now pivot the top rear cover - the sides of the cover are attached to the rear - pivot it toward the back. No need to remove the ribbon cables - just let the top lay there or prop it up with something if the ribbon cables don't have enough slack for the top cover to lay flat on its back. You should now be looking at all of the keys uncovered. notice the rear of each key is where it hinges. You'll notice the grease at the hinge point. The keys are thin plastic so you must take care not to damage them. The way to remove a key is to spread the ears at the hinge point of the key you want to remove. I use a screwdriver sharpened to a point, but a large pair of needle nose pliers work good too. You insert the tapered point of the tool between the ears gently to spread them far enough to just clear the pins. Once they are spread wide enough you'll feel them disengage. Each key also has two hooks located side by side towards the front of the key on the bottom side - they are not visable until the hinge is released, but you must realise they are there or you'll either snap the key back onto the hinge or not be able to pull the key out once you've got it off the hinge. Pivot the key towards you to remove it. What you now have in your hand is not the defective part. You have the top that is touched when playing the keyboard. The defective part is still setting in the mechanism. What's actually happened is the keys are made of very thin plastic where they are glued around the weight and this plastic breaks leaving the weighted end down there somewhere. Examine where the key top came from and how it works. The key top is the part you took off of the hinge. You can see how the keys on each side work and you'll also see what is missing from the mechanism for the key you're working on. To make things easier I always remove one additional key top on each side of a key that I repair to make access easier. Just place the other keys you remove right behind the key area in the order you took them off so it'll be obvious how they go back on. Now the broken weighted mechanism you can lift right out. Actually you can lift it out easier with the weighted end broken off, but once you glue it back together you can still get it in there without to much trouble. You only need to remove the damaged weighted mechanism for the key you're repairing. I remove the key tops on each side of the damaged key for visability only. Take your pair of needle nose pliers and pick out the broken end. Now fit it onto the end of the weighted mechanism in preparation for glueing - just so you can see how it's going to go on there. I use a high quality modeling super glue. Before I came across this glue I used JB Weld, but it takes a few hours to dry. The high quality super glue allows you to put everything back together immediately. Installation is reverse of removal: Snake the weighted mechanism back in once you've repaired it - you can always examine those on each side if you get confused. Hook the key top front first then smoothly snap in place the hinge ears over the pins. Make sure to check the movement of the repaired key, and check also to see if anymore keys are setting lower as they may be in process of breaking off. Once all keys are repaired, carefull lower the top rear cover onto the key assembly. While holding the cover onto the key assembly/base, gently turn the unit over onto its back and reinstall the screws. Should be all washer headed screws - do not over tighten. Check the keys again. Set the keyboard onto its base (if it came with one) and you're done. A little practice and it'll take you less than a half hour to fix the key and get it back together

Posted on Sep 23, 2010

  • 5603 Answers

SOURCE: Hi, I just got a

If this is a brand new unit, exercise your warranty!

BUT FIRST see if packing material worked through the speaker grill... you know littel pieces of the packing peanuts or otherr contamination that sits in the speaker cone and rattles.

Posted on Feb 12, 2011

caroldon
  • 17129 Answers

SOURCE: keys on yamaha digital piano

The keypads can develop dirt , failure of pads which can result in such malfunctioning. If you are able to open the piano then carefully remove the keypads , clean the surface and reset.
this must solve the issue unless the pads/springs/mechanism are having fault.

Posted on Jul 05, 2011

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1 Answer

Why do keys produce no sound?


Hi Kyle:
Have a look at your manual.
Sometimes you'll find that there will be an "input" setting required.
You might also try google with his link.
https://www.google.ca/#q=Williams+Allegro+88-Key+Digital+Piano
Hope this helps.
Cheers.

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Yamaha P-70 digital piano. A few keys are making a loud knocking noise. The note still sounds, but the knocking noise on the few keys can be heard at the other end of the house


There's an extremely comprehensive pair of videos about repairing this problem on YouTube thanks to David Allyn. I have embedded them below, or you can search "P70 Noisy Keyboard Repair".

Jan 03, 2014 | Yamaha NP 30 76 Key Lightweight Digital...

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Key doesn't work properlyon yamaha p95 piano


take it back, its still under warranty. That means the key has a contact problem in the circuit. you have to take it all apart, clean it, check the contacts....probably lint. You can try vaccumming it and it might fix the problem. I bought one too and it wasnt good

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All c keys and all f sharp keys no sound when depressed.


The key scanning matrix cable/circuitry has lost two of the connections. Could be either a loose cable or worst case a cracked circuit board under the keys.

Aug 26, 2011 | Yamaha P85 88Key Portable Digital Piano

1 Answer

Keys on yamaha digital piano are sounding more than one note at a time how can i fix this?


The keypads can develop dirt , failure of pads which can result in such malfunctioning. If you are able to open the piano then carefully remove the keypads , clean the surface and reset.
this must solve the issue unless the pads/springs/mechanism are having fault.

Jul 05, 2011 | Roland Hp337 Digital Piano

1 Answer

Our Yamaha YDP223 has an issue with the damper pedal. When it is depressed, the notes (F#, G) in the upper ranges make a high pitched, annoying sound as the note dies away. We were dealing with this sound...


All sound is generated digitally and the pedal doesn't modify the sound, it just sustains the generator. This is a strange problem and best suggestion iis to find another unit and compare... it may be a characteristic of the design. There isn't anything that you can do to change this. It could be there is a bad ground inside the unit or the digital data is corrupt in the processor. The fact that it is on a particular set of notes is strange...I just checked on my Yamaha piano that is essentially the same electronics and I notice that on one octave above the middle when one strikes F# and G they "ring out". Now this MIGHT be due to the characteristics of the speakers. Those particular notes seem to clash more. I don't have other speakers on mine and unfortunately you did not mention what brand model you have attached. Consumer grade speakers like fancy stereo speakers do NOT do well on these instruments. One has touse pro grade speakers AND use proper interconnecting cables. The speakers, powered type, must be powered from the SAME receptacle as the piano to avoid ground loops.

Feb 20, 2011 | Yamaha YDP223 Digital Piano

1 Answer

Volume difference in keys


Note that the volume of piano keys depends on the "key velocity" which is the speed that the key is depressed. This velocity is MEASURED by the time between closures of the two contacts associated with each key in this unit.

If some contacts have become dirty, then the volume of those keys will vary.

Clean the circuit board traces AND the conductive rubber "pills" using Q tips and ONLY 99% isoprophyl alcohol.

This involves dis-assembly of the unit and you may want to seek professional help with this if you are not electronically adept.

Jun 16, 2010 | Yamaha NP 30 76 Key Lightweight Digital...

1 Answer

My Yamaha YDP-121 digital piano has a key that is slow to pop up once pressed...the key will still produce a sound but the key becomes "sticky" and stays pressed, sometimes requiring manually lifting the...


Check if it might be dragging on the edge of the case. The restoring force for some of these comes from a silicone rubber dome that is oart of the contact. SOMETIMES the dome fails.

Nov 29, 2009 | Yamaha NP 30 76 Key Lightweight Digital...

1 Answer

I have a Roland HP 101 digital piano however certain dont sound


White spirit is NOT what you should use. Mineral spirit leaves a residue film.

Use 99% isoprophyl alcohol.

ALSO inspect the contactboard for cracks by candeling with bright light behind it.

Oct 31, 2009 | Yamaha NP 30 76 Key Lightweight Digital...

1 Answer

Water spillage on keyboard has modified some notes.


Hi John. Doesn't sound good at all. Your Digital piano is an expensive piece of kit and I would seek a professional repairer to put it right. I would Contact Yamaha Kemble and seek advice.

At the end of the keys are small optical sensors that pick up your keysrokes and turn that into Digital Data. I would suspect that the water has shorted them out and they might need replacing.

UK Technical Support is available by telephone on 0870 4445575 - Monday to Friday, 9am to 5pm (4.30pm on Friday).

Regards


Dec 17, 2008 | Yamaha Full-Size Keyboard

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