Replacing Keys (Fatar-Style with lock-tab hole)

Once you have access to the keybed, remove the key return spring by inserting a small Philips screwdriver into the spring. Simply push down to draw the spring out of the lower seat. The white and black keys use the same springs, so don't worry about which ones go where.

If the key has a slot in the back, after the key spring is removed, you will need to release the tab that holds the back of the key in place. Use a small flat screwdriver to push forward on this tab. But be careful to use just enough force to release it, or the tab can break off. (For all practical purposes, even if it does break off, you'll be okay, because the only function of this tab is to hold the back of the key down - and the key spring holds it down anyway.) If your key does not have a slot in the back, just pull up the back of the key and it will release.

Once the tab is released, lift up the back of the key and slide it a bit toward the front, and the key will come free. Because a key needs to slide forward to be released, you won't be able to get a black key free without first removing the white keys that block it in.

Simply reverse this procedure to install the replacement key. You won't need to use a screwdriver on the tab when installing a key - it will simply snap into place. Replace the key return spring, and you're good to go!