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- Firmware / Software upgrade
Roland D-550 – Version 1.02 Update Upgrade OS Firmware D550 [Download]
- €5,00
- https://www.youtube.com/watch?v=IPJPoqow_54
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- Battery Replacement
Roland D50, D550, D10, D20, D110, JD800, JD990 – Battery Replacement Fix
- €4,29
- New Replacement 3V Coin Battery and Holder with Wire leads https://www.youtube.com/watch?v=I4sGG8IyG6g
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