Support Support Documents If you have questions about operating your Roland product, please check our Knowledge Base for answers to the most common questions. You can also contact our Product Support through Roland Backstage. In addition, we have a library of Owner’s Manuals and Support Documents that you can download and reference. Support Documents M-Series Memory Card Battery Replacement Instructions The Roland M-512, M-256 and M-128 memory cards each have an internal battery. If you need to replace the internal battery, please use this PDF document a guide.