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- Firmware / Software upgrade
Yamaha DX-7 – Version 1.8 & Special Edition Update Upgrade OS Firmware DX7 [Download]
- €5,00
- https://www.youtube.com/watch?v=IPJPoqow_54
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- Battery Replacement
Replacement 3V Battery for Yamaha DX7 TX7 DX21 TG77 RX15 RX17 RX21 + many others
- €4,29
- New Replacement 3V Coin Battery and Holder with Wire leads https://www.youtube.com/watch?v=I4sGG8IyG6g
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