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- Joined: 21 Oct 2015
- Posts: 303
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Image problem in French Master System 2 RGB model
Posted: Fri Mar 17, 2023 4:37 pm
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Hi all, recently i bought a french RGB master system 2 but has a problem in the image when power on, sound works perfect.
I tried with a different RVB cable and the problem persist, so the problem is in the console.
I do a little preasure in the video socket but nothing.
Any ideas? if i can't fix it i will back it to the seller.
I upload a photo to see the problem.
Thanks in advance
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- Joined: 30 Jul 2021
- Posts: 13
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Posted: Fri Mar 17, 2023 4:45 pm
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This looks like a sync issue; I know there is an issue with the sync signal provided by the RVB box that prevents it from working with the OSSC, perhaps this is the same issue?
I think there's a mod you can do to the RVB box's sync circuit that improves compatibility but I don't know the details, since it works by default with my Framemeister-based setup.
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- Joined: 21 Oct 2015
- Posts: 303
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Posted: Sat Mar 18, 2023 9:35 am
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Nicole Express wrote This looks like a sync issue; I know there is an issue with the sync signal provided by the RVB box that prevents it from working with the OSSC, perhaps this is the same issue?
I think there's a mod you can do to the RVB box's sync circuit that improves compatibility but I don't know the details, since it works by default with my Framemeister-based setup.
No, I checked the console with another RVB cable and the problem persist and check the cable with other console and the cable works perfect, so the problem is in the console
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- Joined: 30 Jun 2016
- Posts: 196
- Location: Melbourne, Australia
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Posted: Sat Mar 18, 2023 10:13 am
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Have you tested this cable and console combination on a different television yet?
Some TVs don't work well with the Master System's sync output, so isolating the TV as the problem is worth a test.
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- Joined: 21 Oct 2015
- Posts: 303
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Posted: Sat Mar 18, 2023 12:08 pm
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Flygon wrote Have you tested this cable and console combination on a different television yet?
Some TVs don't work well with the Master System's sync output, so isolating the TV as the problem is worth a test.
No, but I have other french RGB master system and works well, for that reason I didn't test it
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- Joined: 30 Jun 2016
- Posts: 196
- Location: Melbourne, Australia
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Posted: Sat Mar 18, 2023 3:08 pm
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law81 wrote Flygon wrote Have you tested this cable and console combination on a different television yet?
Some TVs don't work well with the Master System's sync output, so isolating the TV as the problem is worth a test.
No, but I have other french RGB master system and works well, for that reason I didn't test it
I see. I'd say test anyway, but that does lessen the likelihood.
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- Joined: 05 Sep 2013
- Posts: 3828
- Location: Stockholm, Sweden
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Posted: Sun Mar 19, 2023 11:57 am
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can you open the console and check if there's continuity on the sync pin? there might be a cold join somewhere
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- Joined: 21 Oct 2015
- Posts: 303
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Posted: Sun Mar 19, 2023 10:54 pm
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sverx wrote can you open the console and check if there's continuity on the sync pin? there might be a cold join somewhere
Do you mean to check the din 8 sync pin to the main board?
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- Joined: 05 Sep 2013
- Posts: 3828
- Location: Stockholm, Sweden
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Posted: Mon Mar 20, 2023 8:34 am
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law81 wrote Do you mean to check the din 8 sync pin to the main board?
yes, and if possible even back to the chip generating the signal
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- Joined: 21 Oct 2015
- Posts: 303
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Posted: Mon Mar 20, 2023 11:01 am
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Fixed!!!
Sync pin was cutted but no visible , after fixed also red color was faulty and fixed.
I attach an image before fix, to the eye it seemed fine.
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- Joined: 10 Aug 2017
- Posts: 31
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Posted: Thu Mar 23, 2023 2:59 pm
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law81 wrote Fixed!!!
Sync pin was cutted but no visible , after fixed also red color was faulty and fixed.
I attach an image before fix, to the eye it seemed fine.
Cold solder joints right ?
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- Joined: 21 Oct 2015
- Posts: 303
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Posted: Thu Mar 23, 2023 6:32 pm
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nuno14272 wrote law81 wrote Fixed!!!
Sync pin was cutted but no visible , after fixed also red color was faulty and fixed.
I attach an image before fix, to the eye it seemed fine.
Cold solder joints right ?
Yes but I think the little ring of the pin was broken and if you see the photo you can see a little line. I attach a photo edited
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