Firstly, the RH2 keybed is made by Fatar. Specifically I believe it is a Fatar TP-40. I was nearly set on purchasing a new TP-40 "wood" action keybed if my efforts to repair my existing keybed failed. Unfortunately for anyone wondering if this is a viable option, that didn't happen.
I believe that this keybed is used in the Studiologic SL-990 and SL-880 keyboards.
Working on the keybed once removed from the Oasys was a little difficult. The keys are removed by compressing a pink colored on top of the rear of the key farther than it physically looks like it should go. The rear is lifted and the key moves forward and off of the keybed. The physical hammer action is simple. The velocity is measured by a two rubber dome pads at differing heights which are contacted by the key itself—the hammer action is not involved.
There are two contact strips for the keyboard. One ranges from lowest note to Middle C and the other is the rest. These are the contact boards - I matched the part number on them. They are green where as one of mine is yellow and the other one is orange though.
The reason my original problem occurred is really unknown to me. I fixed it by removing the rubber from the contact circuit board and wiping both with standard contact cleaner. All is better now.[/url]
I managed to lose one spring, which sits at the very back of the keys and provides some tiny amount of upward force. I couldn't perceive a difference between spring and no spring. Either way I didn't want a difference in the middle of the keyboard, so I robbed the one from the lowest A note and moved it to the one I lost after checking the tensions were the same.
