VOGONS


Reply 340 of 351, by GuillermoXT

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Kahenraz wrote on 2022-09-11, 20:03:
GuillermoXT wrote on 2022-09-10, 04:01:

Do I also have to open my Roland SC 55 ST or does mine not have a battery?

The SC-55 ST does not have any front panel controls, so there is no use for a battery. I've opened these units up and can confirm that there is no battery present.

I was lucky again thanks for the information 🙂👍

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Reply 341 of 351, by Jugger69

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I will get a Kawai GMega (version with display) in a few days and I read that the battery was glued on in this devices? I don't find any information on youtube or anywhere about how to change that battery.
Any help is much appreciated!

Reply 342 of 351, by Salient

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Jugger69 wrote on 2022-09-26, 17:33:

I will get a Kawai GMega (version with display) in a few days and I read that the battery was glued on in this devices? I don't find any information on youtube or anywhere about how to change that battery.
Any help is much appreciated!

https://www.wavetable.nl/wp-content/uploads/K … nals-scaled.jpg

As you can see the battery is indeed soldered in place but is exchangable for a straight (standing/vertical) battery holder + CR2032 coin battery.

MIDI comparison website: << Wavetable.nl >>
(Always) looking for: Any Wavetable daughterboard, MIDI Module (GM/GS/XG)

Reply 344 of 351, by Salient

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Jugger69 wrote on 2022-09-29, 09:24:

Thanks a lot! Would this holder fit?

I cannot be 100% sure since the picture does not show both sides of the battery connections. I don't have the GMega at hand now so I can't check it either. It may fit but it may well be that the original battery solder lugs are one pin on each side.

My guess is though that it would fit. Another option is to take a coin cell holder with short wires. The holder can then be taped somewhere with double sided tape or something.
Something like this: https://nl.aliexpress.com/item/1005003712085342.html

MIDI comparison website: << Wavetable.nl >>
(Always) looking for: Any Wavetable daughterboard, MIDI Module (GM/GS/XG)

Reply 345 of 351, by Kahenraz

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If you're already planning to solder, may as well remove the old one and find out. The replacement parts are also cheap enough that you can just buy them with good intentions and little worry if it's not the right one.

Unless you plan on modifying any of the features, there is no reason to have a battery in one of these. Especially for games.

Reply 347 of 351, by Dominus

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Pictures or it didn‘t happen! Please 😉

Windows 3.1x guide for DOSBox
60 seconds guide to DOSBox
DOSBox SVN snapshot for macOS (10.4-11.x ppc/intel 32/64bit) notarized for gatekeeper

Reply 348 of 351, by Jugger69

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Yeah. I hear you. Will do.

Update: The internal battery is soldered - its a CR2450 battery. There are 3 holes to connect the battery holder. So the shown holders should fit. I ordered some from amazon and I will show some pictures when I remove the old one and install the new one.

Reply 349 of 351, by Jugger69

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I exchanged the soldered-in battery in my Kawai GMege for a CR2320 battery holder.

1. Open the case (5 screws, 2 on each side, 1 on the back - screws are equal in size) . The battery is located in the rear.
2. Free the mainboard. There are 4 screws in the corners and 6 more on the back panel. Warning: there are two screws which are not equal to all the others - the one over the RCA sockets and the one over the serial connector. Lift the mainboard.
3. Desolder the battery - 3 pins - I used a desoldering gun. Fun fact: The "old" battery showed no sign of wear and still had a voltage of 3.1V - not bad at all!
4. Bend the battery holders pins a little so they fit into the holes. Solder in place.
5. Put together again.
6. Damn! The Kawai doesn't like loosing the battery power and its showing some error message after powering on. I did a GM Reset followed by a Factory Reset and all was well again! 😀

  • GM Reset: Push “>” + EXIT” simultaneously.
  • Factory Reset: Push “SYSTEM” until the display shows “FACTORY RESET EXEC?=N/Y” then answer “YES” twice by dialing wheel to the right.

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Reply 350 of 351, by Dominus

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Nicely done!

Windows 3.1x guide for DOSBox
60 seconds guide to DOSBox
DOSBox SVN snapshot for macOS (10.4-11.x ppc/intel 32/64bit) notarized for gatekeeper

Reply 351 of 351, by vutt

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It turns out that Roland SC-55K does not have battery inside.
Since that "Karaoke" model haven't been mentioned here I thought I share my findings so you do not have to open yours.