OEM Roland RS-640 servo board--1000004994. To be used with: Roland RS-640 / RS-540.The item "OEM Roland Servo Board for Roland RS-640 / RS-540 -1000004994" is in sale since Thursday, May 26, 2016. This item is in the category "Business & Industrial\Printing & Graphic Arts\Printing & Graphic Essentials\General Accessories". The seller is "colorfulworldprinting" and is located in Haidian Beijing. This item can be shipped worldwide.