Ctk700 teardown

[dcraw1]

How do you open the keyboard to access the keys? I have removed the screws but still can’t open it 

[Jokeyman123]

Take a look at this-see below link

 

at least the  beginning of his video although he isn't too clear about disassembly, with one exception...notice he needed to take the plastic panels underneath apart and although he is not clear about it-I am guessing these need to be removed-and are helping to keep the CTX from coming apart. There are similar plastic covers underneath my 560 and 350-that hide the very screws needed in order to get the top control panel apart. Check every recessed part underneath-even one screw you might miss will keep the CTX from separating due to its rigid, connected design.

 

This post illustrates that the earlier CTK's and my XW-P1 have the same physical construction for the keys as this one does-and most times, the top metal screws holding the backs of the keys fastened can loosen, and cause the back of the key to clatter against the upper edge of the top panel. He also shows the other part that causes some to have trouble with inconsistent key contacts-the dreaded silicon rubber dual boot contacts which if even slightly contaminated inside, or lifting off the IC board a bit, will cause some nasty problems. If you have a 1) dead key 2) key not responding to velocity sensitivity correctly or 3) has no velocity sensitivity at all...chances are the problem is right there under in those boots. These IC boards seldom fail, unless you use hammer fists to play the keys, or your dog tries to make his own Tik-Tok video with your CTX!!!!

 

Interesting how Casio uses their own dedicated ASICs chip for almost all the functions and that they are using carbon strips as resistors, never saw that before!

https://www.youtube.com/watch?v=iAcNjVdd25