Roland - S‑50, S‑550, S-220, JX-10, W‑30, MKS‑70, MKS-50, Juno-1 & 2 and more. Make note of wire orientation, cut the wires from the outlet, remove the outlet. Locate the 2-prong outlet. Insert and screw in new 3-prong outlet and connect the wires by soldering.
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