Identify Keyboard model from motherboard only

1

I have just inherited a Kawai motherboard from an unknown Keyboard. It is marked EK-001. Also marked MDK311V-0. On top is a stamped number(serial?), it is 6057. Any info would help as I would like pinouts to test this board. If I can identify it I will buy parts here, assuming I can, of course. Thanks in advance!

2

Do you have any pictures of the board? It sound like a K1 but I can’t be sure without visuals.

3

My K1’s motherboard is marked MI-034 and MDK 343 V-0 (see photo).

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DSC059961920×1061 313 KB

Yours must be a different model.