Have you opened your SC-55 to check the battery inside?

Discussion about old sound cards, MIDI devices and sound related accessories.

Re: Have you opened your SC-55 to check the battery inside?

Postby yawetaG » 2017-12-04 @ 15:53

voodoo5_6k wrote:
blackmasked wrote:What's your experience with power supplies for Roland SC and Yamaha MU modules? Have you experienced any failures? I recently purchased a genuine Yamaha PA-130 PSU for my MU80 as I no longer trust the 20 year old PSU that came with it, but it's a bit of a struggle to find a decent replacement PSU for a SC-55. Looks like Roland has not released a newer version of ACB-240 and I don't really trust all these third party compatible PSUs available on ebay.

Oh yes, they did release a replacement unit.

The Roland PSB-230 (or PSB-1U if bundled with a Roland device) can replace, among others, any Roland ACB or ACI PSU (the PSUs bundled with e.g. MT-32, CM-32L, SC-55 and many, many other devices). I use these for all my Roland devices (UM-550, CM-32L, SC-55) for several years now. Shouldn't be too hard to find one, it is a current product.


And if you want noise-free sound output, getting an original Roland-branded power supply apparently is the better choice, as cheap no-name Chinese units are known to cause interference issues on synths...
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Re: Have you opened your SC-55 to check the battery inside?

Postby Elia1995 » 2017-12-04 @ 22:12

I hope I'll get a Roland SC-55 and/or an MT-32 one day... and the first thing I'll do will certainly be to check the battery, after seeing this thread :)
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Re: Have you opened your SC-55 to check the battery inside?

Postby bjwil1991 » 2017-12-05 @ 01:37

Elia1995 wrote:I hope I'll get a Roland SC-55 and/or an MT-32 one day... and the first thing I'll do will certainly be to check the battery, after seeing this thread :)

The MT-32 doesn't use a battery unless it's the 2nd version (headphone jack), or not at all, I believe. The SC-55 and higher use them to keep the soundbank data (if my memory serves me right).
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Re: Have you opened your SC-55 to check the battery inside?

Postby static- » 2017-12-05 @ 04:34

Just opened my SC-55mkII (bought 7 years ago for $140) and battery was in perfect shape. I removed it anyway.

PS. holy crap Tyrian sounds amazing on an SC-55. Run the setup.exe to access the Jukebox.
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Re: Have you opened your SC-55 to check the battery inside?

Postby Elia1995 » 2017-12-07 @ 07:16

What is that battery for anyway? I think SC-55 and MT-32 use electrical plugs, but not owning either YET, I can't really point my fingers at that, as they could also use batteries, as much as I know...
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Re: Have you opened your SC-55 to check the battery inside?

Postby derSammler » 2017-12-07 @ 07:24

To keep user settings, just like the CMOS battery in a PC.
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Re: Have you opened your SC-55 to check the battery inside?

Postby keropi » 2017-12-07 @ 09:31

No mt-32 revisions use batteries or store settings after power-off , there are mods to add a battery though in order to keep settings and that's the reason SC-55 does have a battery: to keep settings/setup according to the artist's setup/wishes. Unless there is a very specific setup issue a common user like a gamer can remove the battery all together and the unit will startup with the default settings every time, something that is actually desirable for gaming reasons.
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Re: Have you opened your SC-55 to check the battery inside?

Postby fitzpatr » 2017-12-15 @ 04:30

Well, as expected the SC-88Pro also had a battery. I needed to remove the screws holding the main, upper board before I could access the battery to remove it.

I should add that the battery was showing very early signs of corrosion. No issue now, but as always, it is better to take the precaution.
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Re: Have you opened your SC-55 to check the battery inside?

Postby cheesemaun » 2017-12-19 @ 00:45

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Last edited by cheesemaun on 2018-12-21 @ 00:38, edited 1 time in total.
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Re: Have you opened your SC-55 to check the battery inside?

Postby derSammler » 2017-12-19 @ 19:38

Just had another SB-55 with severe damage due to leaking caps on the interface board. This makes a rate of 100% so far (two checked, two damaged). In both cases, traces were completely gone. Fortunately, it's easy to fix. But still, check your SB-55 if you got one!
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Re: Have you opened your SC-55 to check the battery inside?

Postby Cga.8086 » 2017-12-25 @ 03:19

you should, i once opened one
and one side of the battery was completely white
removing the battery it was a dust kind of particle, all white. but it did not ruin the pcb.
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Re: Have you opened your SC-55 to check the battery inside?

Postby SpeedySPCFan » 2018-1-09 @ 02:55

I know this thread is about the SC-55, but this is about another SC so I guess it fits here. How exactly are you supposed to take the battery out of an SC-88 Pro? I feel like I'm gonna snap the plastic off the battery holder every time I pull on the battery and try to pry it out upwards. If I can't get it out then it's not the biggest deal; I couldn't find any signs of corrosion on it (the top, battery holder, and area around the holder were completely clean, and nothing came off the bottom of the battery when I pressed it with a pair of tweezers), but I'd like to replace it just to be safe if I can.
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Re: Have you opened your SC-55 to check the battery inside?

Postby fitzpatr » 2018-1-09 @ 04:44

SpeedySPCFan wrote:I know this thread is about the SC-55, but this is about another SC so I guess it fits here. How exactly are you supposed to take the battery out of an SC-88 Pro? I feel like I'm gonna snap the plastic off the battery holder every time I pull on the battery and try to pry it out upwards. If I can't get it out then it's not the biggest deal; I couldn't find any signs of corrosion on it (the top, battery holder, and area around the holder were completely clean, and nothing came off the bottom of the battery when I pressed it with a pair of tweezers), but I'd like to replace it just to be safe if I can.


I used two thin blades: one to pry up the front, and the other to push from behind. Be gentle and it will be fine.
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Re: Have you opened your SC-55 to check the battery inside?

Postby SpeedySPCFan » 2018-1-09 @ 16:32

I didn't do exactly that but I got it to work, thanks! I propped the battery up with my finger, and then wiggled it back-side to back-side with a super tiny screw driver. Eventually it slid right out, and I was able to replace it with a new battery. The old one was just barely starting to leak, so I'm glad I did that. Ironically though the new battery I put in (which is an Energizer I've had laying around for years) has LESS battery than the old one so I'll have to get a replacement for that tomorrow. It's not all bad though, because I needed to record some footage of me replacing the battery for a review :)
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Re: Have you opened your SC-55 to check the battery inside?

Postby CrossBow777 » 2018-2-08 @ 16:28

If this was already mentioned I apologize, but do these SC modules use a rechargeable type coin cell battery in them? I have an MT-200 and the battery is a tabbed soldered in type. Was thinking about yanking it out of there and putting a holder in place and a fresh battery, but if they are rechargeable then I would need to make sure I got a rechargeable cell.

Also, there is a date and time clock on the MT-200 that you can see via the "hidden" diag menu. But doesn't appear there is a way to set that as the alpha knob and buttons do nothing on that particular section?

Nothing in the hidden menu is mentioned in either of the two standard MT-200 manuals and I've not seen an actual service manual for one (Which, would probably answer all of my questions.).
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Re: Have you opened your SC-55 to check the battery inside?

Postby bjwil1991 » 2018-2-08 @ 16:55

The SC modules use the regular lithium batteries (non-rechargeable).
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Re: Have you opened your SC-55 to check the battery inside?

Postby ab0tj » 2018-3-11 @ 17:45

I opened up mine today and the battery had definitely been leaking. Luckily none of it made it to the board, but it was not a pretty sight anyway. I just removed it.
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Re: Have you opened your SC-55 to check the battery inside?

Postby derSammler » 2018-3-13 @ 16:44

Removed the battery from my SC-88 Pro yesterday. It had signs of leakage, too. No damage, however, as the leakage only sticked on the coin cell itself. The SC-88 Pro works fine without the battery, just as the SC-55, but you lose some features like MIDI IN B or second audio out, which are both off by default and won't stay on with the battery removed.
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Re: Have you opened your SC-55 to check the battery inside?

Postby bjwil1991 » 2018-3-13 @ 16:56

The battery was primarily used for musicians, right? Without the battery, that should be OK for PCs (games), if my memory serves me right.
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Re: Have you opened your SC-55 to check the battery inside?

Postby derSammler » 2018-3-13 @ 17:13

Well, for games it makes no difference. But the unit will not store any settings you make.
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