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Check it again. It may have something dragging on the key, maybe something sticky like soda or juice residue. You can also try swapping out the key with another C or F key that is less used. Good luck!
You'll likely need to try removing the keys, so you can see if something is stuck underneath it. That would be my first move.
In order to do this, follow these steps:
The front panel and the keyboard fall are designed to be easily removed for tuning purposes anyway.
To check it out....The front panel likely has a little clip either side near the top on the inside. Just undo these clips and lift the panel out. The keyboard fall should then be easy to lift out too.
There may be a long wooden rail which you need to take out also. Once inside, the keys themselves can be carefully lifted off the central spikes on which they sit.
Remember how you did this so you can get them back in again.
Since your piano is so old and worn, Often times, the wooden rail in front of the keys (just above your knees when you are playing) bows inwards a little due to age and temperature/humidity fluctuations. This then causes the little white front bit of the keys to jam against the wood and you have to physically lift the keys back up to return them.
If this is the problem you will need to take out the keys and shave some wood off the inside of this rail to allow the keys to move up and down freely again.
Or sometimes you may find you have a small object caught under a key or two. Much simpler to remove and free up your keys, if this is your problem..
Hopefully, this is all you will find wrong with your piano.
If all else fails...
I wouldn't attempt to tune your piano by yourself. I would seek out an experienced piano tuner for that.
But it is worth attempting to repair it first before you go that far.
Good luck !!
The Previa key construction was a lot better than yamaha\'s, however it still suffered the normal casualties caused by even the slightest \'knock\'. Believe it or not, most damages are caused to DPs when you\'re NOT playing it. For example, transporting - setting up - packing down etc. I used to market Roland and Casio DPs for a number of years. And the most common problem was the \'stuck key\' syndrome (as well as dust on the contacts). I bought it down to the way people, children, adults actually SIT down to the piano to play. Instead of using the piano stool to balance themselves, many people place their hands on the KEYBOARD before they plant !!! NO NO NO :/ That is the prime reason there are key breakages in - pretty much the same place. Children are a classic example when they sit at a piano. They use the keyboard to leverage themselves UP. Because the DP is not on, it doesn\'t make a sound - therefore "it can\'t POSSIBLY my child\'s fault!!" Oh yeah...have your darling angel sit at an acoustic piano and they\'ll be playing 12th Street Rag before they even get their on the seat!!!
Long and short, possibly broken band, slipped hammer - or broken. Here\'s a video which explains how you might be able to fix the problem yourself. Not much to it really...just take your time and don\'t force anything
To repair a key that has come loose from the pivot, on MUST open the keyboard to get at the mechanism of the leyboard itself. Usually a spring has been displaced or, worse case, a piece of the key pivot is broken off. Be real careful of the ribbon cable tying the two halves of the shell together. Keep track of the screws, type and length to restore them to the proper places.
It kinda depends on if a hammer is broke or key is broke. Or if a foreign object is stuck in there. Typically not hard if you can remove screws and remember how they go back in. TypicAlly the bottom panel comes off keyboards ( start by removing those screws ) or the top case will fold up ( still bottom of keyboard screws ) then multiple screws to realease keyboard assembly. May have to disconnect some wires/ ribbon cables so have a sharpie ready to label to ensure correct reassembly. Then it's all about if they have separate keys or a keytree or sometimes just removing ba key and reseating fixes sticking problems. Get yourself a can of blow off or contact cleaner just in case. Not sure who locally to you sell parts but you can always call manufacturer and ask who does their distribution for parts.
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.
Most keyboards of that scale are not especially fragile. You may have to remove the back (lots of screws) and maybe a bezel that is across the top of the keys to get full access to the keys. The good thing is you have lots of working models --- all the other keys. So carefully consider the differences. It may be that one or more plastic parts have broken, particularly if it fell and landed with pressure on that key.
Most of the keyboard manufacturers have parts departments that can supply just the part of the keyboard you need if you can specify exactly what you want.
Yes spray some contact cleaner into the switch while unit is off. move it back and forth spray a little move. dp this a few times. this will clean it up and it should work better. Get this stuff a Radio Shack. $8.00 a can. I use this stuff on all kinds of electronic;s. Like a stiskiy keyboard button, so forth. Good luck DFD
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