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Roland SCB-55 with missing filters

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First post, by JimWest

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Hey guys,

I need your advice. Maybe you already have experience with the problem.

I have a Roland SCB-55 here and it works really well, but it lacks two noise filters (FL3+4).
At least I think that they are noise filters. 😀

Roland SCB-55.jpg
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Missing Filters.jpg
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Missing Filters.jpg
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The two missing components (Indication F103) were simply bridged.
It leaves me no peace and I would like to restore a more original state.
Now I have searched on the Internet and found very similar filters from Panasonic.
See the following datasheet https://industrial.panasonic.com/cdbs/www-dat … /AWF0000C30.pdf

Maybe Panasonic has also made the original filter. I think the majority of the components used by Roland came from Japan at that time.
Thus, Panasonic could also have made the original filter.
In the datasheet I found ELKEA103FA. I think this model could work.

I have already ordered and received the components.
They are slightly smaller than the original filters, but the contacts might just fit.

Size Comparison.jpg
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What do you think, is it a good idea to install the new filters?
Do you think they will work at all?
Would you fix that?

Reply 1 of 10, by Tiido

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Anything will work there pretty much.

T-04YBSC, a new YMF71x based sound card & Official VOGONS thread about it
Newly made 4MB 60ns 30pin SIMMs ~
mida sa loed ? nagunii aru ei saa 😜

Reply 2 of 10, by JimWest

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Here is the result after the repair.

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I would say it looks much better.
The card is still working and I didn't notice a difference. 😀

Thank you Tiido, you have dispelled my last doubts.

Reply 3 of 10, by Tiido

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If I was you I would move two of them around, put same ones on power and same ones on sound lines.

T-04YBSC, a new YMF71x based sound card & Official VOGONS thread about it
Newly made 4MB 60ns 30pin SIMMs ~
mida sa loed ? nagunii aru ei saa 😜

Reply 4 of 10, by zuldan

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JimWest wrote on 2018-10-27, 10:48:
I have a Roland SCB-55 here and it works really well, but it lacks two noise filters (FL3+4). At least I think that they are noi […]
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I have a Roland SCB-55 here and it works really well, but it lacks two noise filters (FL3+4).
At least I think that they are noise filters. 😀

Roland SCB-55.jpg
Missing Filters.jpg
The two missing components (Indication F103) were simply bridged.

Hi Jim, I’m in the same position. The exact 2 components have broken off. Unfortunately the ELKEA103FA is not sold anymore 🙁

9749ADC8-FAD4-4452-AC5A-EDC6640D0A10.jpeg
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Last edited by zuldan on 2024-04-09, 05:35. Edited 1 time in total.

Reply 5 of 10, by zuldan

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Tiido wrote on 2018-10-28, 06:16:

If I was you I would move two of them around, put same ones on power and same ones on sound lines.

Can you recommend something other than the ELKEA103FA? You mentioned anything can be used but I’m not sure even where to start.

Reply 6 of 10, by zuldan

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Found various similar components but they are all end of life. Going to keep searching. Determined to get this little beauty working again.

https://au.element14.com/CategoryDisplay?stor … catalogId=15001

Reply 7 of 10, by keropi

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I have used these on one of my scb55s : ACF451832-103-TD01
but ofcourse it is also not stocked... I do have some spares so if it comes to that I can just ship you a couple

🎵 🎧 ⏳ ⚡ PCMIDI MPU , OrpheusII , Action Rewind , Megacard and 🎶GoldLib soundcard website

Reply 8 of 10, by zuldan

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keropi wrote on 2024-04-01, 07:49:

I have used these on one of my scb55s : ACF451832-103-TD01
but ofcourse it is also not stocked... I do have some spares so if it comes to that I can just ship you a couple

Thank you very much keropi. I’m going to try find something similar to your TDK version. If I don’t get anywhere then I may take you up on that offer. I’m more than happy to pay for the components plus shipping.

If you don’t mind, do you have any close up pictures of the ACF451832-103-TD01 installed on your card?

Reply 9 of 10, by keropi

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zuldan wrote on 2024-04-01, 08:41:

[...]
If you don’t mind, do you have any close up pictures of the ACF451832-103-TD01 installed on your card?

sadly I do not have this card anymore - but I remember that the size was an exact match , if that's what you are wondering about

🎵 🎧 ⏳ ⚡ PCMIDI MPU , OrpheusII , Action Rewind , Megacard and 🎶GoldLib soundcard website

Reply 10 of 10, by zuldan

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keropi wrote on 2024-04-01, 10:27:
zuldan wrote on 2024-04-01, 08:41:

[...]
If you don’t mind, do you have any close up pictures of the ACF451832-103-TD01 installed on your card?

sadly I do not have this card anymore - but I remember that the size was an exact match , if that's what you are wondering about

No problem 😀 I just wanted to see what they looked like compared to the original components and to see how well they fit on the board.

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