Question about Yamaha Full-Size Keyboard

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A friend of mine dropped her P120 keyboard. I was interested in just looking at it to see if there was something I could do. How do you get inside this thing?

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It is probably held together with screws - and they are probably either phillips or Torx head - probably #1 or 2 phllips or #15 Torx. Torx available at Sears - K-mart or at an auto parts supply place. Take it with you to assure you get the proper size AND LENGTH. If the fastener is deep, you have to be able to reach it!

There are probably several tabs around the edge you will have to pop out too. Some screws may be covered over with rubber feet or tape of some type.

Once inside, you will look for a connection that may have come free of its counterpart or (less likely) broken component boards

Posted on Sep 27, 2009

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Posted on Jan 02, 2017

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Does the casio AD A12150LW MAINS ADAPTOR HAVE A FUSE INSIDE


No - the fuse is inside the keyboard. Or at least it should be. On your particular model have a look on the underside of the keyboard (where your knees go).

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When I press the keys any harder than a light touch on my Yamaha, the entire piano keyboard turns off and on again. Is there a wire loose or something? How do I fix it? It's my friend's Yamaha


Is the unit operated directly from the mains or via a mains adaptor (transformer) If it is the later then my guess is that the socket owhere you plug the power adaptor in is loose. They have a habit of breaking away from the circuit board. When you then move the keyboard it breaks the connection . You can test this theory by turning it on, looking at display or light that is on, move the plug and see if it cuts out. If it does the fault is here. Replace the socket and if needed repair pcb as pads tend to break away from board.


If it is mains operated or power socket is OK then it could be loose cables or a break on the PCB. The socket option is the more likely.


If you need more specific info on your keyboard please state make and model and request further info under this topic.

Jan 23, 2013 | Music

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Looking for music stand that fits on top of p120


These are sold online at Kraft Music

Yamaha WB53080R Music Rest
Replacement Music Rest for P120, P140, P155, PF500, PF1000

Jun 24, 2010 | Yamaha Music

1 Answer

I have a CDP-100 and need disassembly instructions for access to internal keyboard assembly. Unit was dropped while unloading from car. Now some keys are akimbo and won't play as though they are off their...


I just fixed my CDP 100 which had a similar problem - dropped and two keys not working up one end.
1. Lay keyboard upside down on soft surface. Under keyboard is plastic cover held on by 17 screws. Remove all these and lift cover away. The metal key ends are all revealed.
2. Locate the disloged keys. Carefully press them back into position - they will "click" into place. Make sure the corresponding key on the keyboard isn't stuck in an "up" position - you may have to remove the metal key part and replace it again while making sure the key is correctly seated.
3. Replace cover and screws.

Feb 22, 2010 | Casio Music

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I am getting the error message scn on my p120 keyboard and there is no sound from the keyboard.


Just bought a P120 from craigslist. A computer recycle company was selling it as parts for $150. They said it has the SCN error code and the keys don't play. It played the demos only.. Payed $100; took it home, opened it up & found the keyboard plug had detached from the motherboard. Plugged it in & BAM! It works just fine.

Oct 18, 2009 | Music

1 Answer

I need to repair a sticky key on a P120. Is there a repair manual?


Call around to local music stores and ask about the closest authorized Yamaha repair center. If it is still under warranty, they should replace the keybed free of charge.
Here is a great website with the do's and don'ts about self keyboard repair. http://www.mikebarden.com/view.php/area/1/digital-piano-repairs-keyboard-repairs

Sep 17, 2009 | Yamaha Full-Size Keyboard

1 Answer

Keys sticking on Yamaha p120 digital piano....how do I open it up


you may not need to open it up.
try using a wax based furniture polish on the keys, it will leave a layer to act as a lubricant between the keys.

Aug 24, 2009 | Yamaha Full-Size Keyboard

6 Answers

How doI open a Yamaha P120 to fix sticky keys?


I've had the very same problem twice so far. The only solution I figured is to simpy purchase an equivalent key (contact Yamaha service in your country for this) and to replace the broken one. The reason why the key doesn't work smoothly as the other one is not dirt therefore any cleaning won't help. The key is cracked deep in the place where it's attached to its 'axis'. So you'll need to remove all the screws and unmount the cover (it needs a sideshift to open once the screws are removed), be careful with the speaker wires. However you'll need firm moves anyway. Opening is tricky and gets me surprised anytime I do it so you'll need some courage :). Replacing the key is even more tricky. You'll have to remove the broken one by pulling it horizontaly (use some force, it's broken anyway). Placing a new key you'll need to uplift the 'hammer' and then slide a new one. I'm sure you'll figure it out once you see it with your own eyes (it's really hard to decribe but not so hard to do it). Hope you'll do fine. I haven't tried glueing the crack for I doubt it would work for long. Good luck!

Jan 28, 2009 | Yamaha Full-Size Keyboard

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