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Yamaha DX-7 - Internal Battery has Bulge - is at 3V

Posted: Fri Mar 13, 2020 1:16 am
by Arpmuless
Hello,

My DX-7 has a bulge on its CR2032 battery (where all the data is stored i.e patches)
It displayed 2.9 V to 3.1 V at random, depending on how long the synth is on.

Should I replace this battery? It still has that original soldered battery style, and Definitely cant be the one it came with from the factory. I have had this synth for almost 2 years now and that bulge was not there before.

Any expert advice? (It probably is just obvious to replace the thing and reload the patches via MIDI)

Thanks,
Arpmuless.

Re: Yamaha DX-7 - Internal Battery has Bulge - is at 3V

Posted: Thu Mar 19, 2020 11:26 am
by Weirdofromouterspace
Arpmuless wrote:
Fri Mar 13, 2020 1:16 am
My DX-7 has a bulge on its CR2032 battery [...]
It displayed 2.9 V to 3.1 V at random, depending on how long the synth is on.

Should I replace this battery?
Yes, and better today than tomorrow at that.

While replacing the battery, see to it that you add a battery holder for easier battery replacement in the future. Best cut the soldered battery holders mechanically (side cutter) and remove the battery before desoldering the rest of the holders from the pcb. These batteries don't take too well on being heated with a soldering iron ;) - you don't want that.