Reply to Drink got spilled over our vestax vci 400 unit. The other tempo slider got messed up.

So we can't figure out how to decompose this thing so that we could clean it up. Does anyone know is there any blow-out schematics considering this product? We can't get the upper metal plate off from the body and there is no pics or related information on the internet that could benefit us. Does anyone know how should we proceed in our situation?