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Changing internal Battery

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olufsen

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Hi everyone. One of my old mz r90 has a dry internal battery. I open it and I saw that I need to change the battery (Sanyo ML 614). I enter in service mode and I notice that the recorded time on this unit is 0. From what I know this should be wrote on eprom. Beside the clock, what is the function for this battery? This is worth changing, when it a chance to break the display board that is fixed with adhesive tape? Thank you.

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