Comments on: Repairing a Casio Piano Keyboard (CTK 400)

By: zaba

zaba — Sat, 30 Apr 2011 13:57:28 +0000

i broke one of my keys off and i dotn know where it is. what should i do ?

By: BillM

BillM — Tue, 12 Apr 2011 18:30:36 +0000

One key on my ctk 700 stopped working and I was afraid it too was broken. However once I took the keyboard apart I discovered that rather than a broken key the rubber “spring/contact” for that key is broken. These springs/contact come in a strip for 12 keys. I do not believe these are repairable so I am wondering if a replacement is available.

By: John

John — Sat, 04 Dec 2010 23:32:23 +0000

Being a modeler I work with styrene a lot, I had cut a piece of brass shim stock to fix the key when I first seen this site but I thought I would do a test on the broke key with plastic solvent cement and sure enough it was what I hoped for.
I keep several thicknesses of styrene sheeting on hand so I was asured I had what I needed.
The bump on the key where it broke had to be filed down flush with the back end of the key being repaired.
I then used the solvent cement and glued the key back in position, after that I took .005 styrene and filled the void between the mount of the keys to the bumb on the key that was filed down.
Once that was dried I cut a .010 piece the width of the key and fitted it 1 inch passed the bump where it had broke.
I then glued that piece on topt of the filler, the solvent melts the plastic and fuses the pieces together.
I also added a little security by taking a piece of the styrene by folding it and glued it on the other side of the key in the joint where it cracked or broke.
Though you can pretty much start using the key right away I would recomend waiting a few hours for the solvent to completly dry.
Hope this helps, a few pictures would be much helpfull but I don’t have a clue on how to down load them.

By: Friendly McGee

Friendly McGee — Fri, 19 Nov 2010 06:13:25 +0000

Hey Y’all,

A little dab of hot glue will fix your busted keys. It’s flexible so it can take the bending.

By: NAX

NAX — Sat, 25 Sep 2010 09:41:14 +0000

my daughter’s is the ctk-700. fixed the broken middle key (just w/ super glue) but later decided to also interchange w/ the set on the leftmost. thanks all you guys for the inputs.

if it breaks again, will consider getting a replacement.

thanks again and more power to all!

yahoo!

By: Scott C

Scott C — Thu, 09 Sep 2010 20:19:53 +0000

Thanks for the information. It was very helpful. I, too, broke the keys on my Casio PX-555R full size keyboard. I have been playing for a long time, and I found that my thumbs match on the G, A, and D keys. Thumbs hit a lot harder than fingers, particularly when doing straight on chords on piano or keyboard, quite common in pop music. They do sell replacement keys. Try 800-435-7732; 800-706-2534. $6.00 for C E G B; $5.00 for D F A. $4.95 S & H + State tax.

By: Jack Crump

Jack Crump — Tue, 13 Jul 2010 00:57:02 +0000

My granddaughter has a CTK-720 with broken keys. We have obtained replacement keys but I’m having trouble removing the cover of the keyboard so I can get at the keys. I removed a total of 16 keys from the bottom and the cover is loose on the ends but not in the middle. Can anyone help?

By: hooeezit

hooeezit — Wed, 03 Feb 2010 05:15:59 +0000

I found a company in California that sells parts for the keyboard. The list of parts for a Casio CTK450 is at:
http://www.pacparts.com/library/model.cfm?mfg=CASIO&model_id=CTK450&CFID=321383&CFTOKEN=55401510&action=list_part&back=0

By: xenonlit

xenonlit — Tue, 02 Feb 2010 00:30:54 +0000

I might be a customer, because, while I am fairly delicate with the keys, I do tend to get a little exuberant now and again. It makes no sense, because extra force does nothing to affect the tone!

By: hooeezit

hooeezit — Mon, 01 Feb 2010 23:49:40 +0000

Great find xenonlit. Thanks for sharing. I did run a search on the web to see if anyone was selling the part, but didn’t find any. Never occurred to call Casio directly. If I get some interest, I’ll buy a few sets and stock them so people can use me as their ‘retailer’