Jccwu wrote on 2025-05-11, 16:52:

not about Roland, but Yamaha.
Tell me, has anyone changed the battery in the Yamaha MU80?
It looks like there is a non-standard battery that is soldered to the pad. Should I be afraid of its leakage? When turning on the device it says Low Battery.

The battery has to be desoldered to be removed. It's not necessary to replace it with another one for use with games. The low battery message will continue to appear each time at power-on, however.

You could try using a pair of snips to cut the metal legs. Just be careful not to apply too much stress to the legs, or else you might tear off one of the solder pads on the PCB.

I'm not worried about a dead battery, I'm worried about it leaking.

You will have to either clip it off with some very strong side cutters or desolder it. There's no guarantee that it won't leak eventually. Although uncommon for CR2023 batteries, I have seen it happen. This thread is one example of that.

Kahenraz wrote on 2025-05-12, 16:18:

You will have to either clip it off with some very strong side cutters or desolder it. There's no guarantee that it won't leak eventually. Although uncommon for CR2023 batteries, I have seen it happen. This thread is one example of that.

It doesn't look like a CR2032, this one is a bit thicker.
It won't be hard to unsolder it.

upd: unsoldered. There is a CR2450 there

I recently managed to revive a Roland SC-88 by replacing all electrolytic capacitors on the digital board and fixing a trace that unfortunately was damaged by the leaking capacitors.
It only gave loud static on the output and the memory self-test gave NG as a result on one of the DRAM IC's.

These devices really DO need to be looked at on the inside and worked on if you want them to last.
Really, I think the batteries are the least of the worries by now!

Salient wrote on 2025-05-12, 17:56:

I recently managed to revive a Roland SC-88 by replacing all electrolytic capacitors on the digital board and fixing a trace tha […]
Show full quote

I recently managed to revive a Roland SC-88 by replacing all electrolytic capacitors on the digital board and fixing a trace that unfortunately was damaged by the leaking capacitors.
It only gave loud static on the output and the memory self-test gave NG as a result on one of the DRAM IC's.

These devices really DO need to be looked at on the inside and worked on if you want them to last.
Really, I think the batteries are the least of the worries by now!

probably a bad batch of electrolytes. My SC88 is clean

Jccwu wrote on 2025-05-12, 19:15:

probably a bad batch of electrolytes. My SC88 is clean

Apart from this SC-88, so far I have found, and fixed, the same issue in 2 Roland SC-33's and a Boss DS-330 sound module. I think this is more widespread than just a few unlucky units.

Soldered a new battery into my Yamaha MU50

for some reason all the modules are in terrible condition, even on eBay. I regrown mine.