New OSSC, LCD says no sync with certain consoles.

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  • #21956
    Necrobot20XX
    Participant

    I just got my OSSC today and started testing out different consoles. My Wii over YPbPr was the first thing I could get to work. Then my NES modded for RGB worked over the Retro Access SNES Scart cable. However I tried 2 different models of un-modded SNES, an RGB modded N64, and my RGB modded PC-Engine DUO-RX, none of which worked. My PC-Engine cable came with it when I ordered it, so all I know is that it’s a JP-21 cable but I used the OSSC adapter for it. My Wii used the official Nintendo component cable, all of my other Scart cables are from Retro Access. My consoles were running straight into the OSSC then HDMI to my TV. I don’t understand why the NES is the only thing that worked over Scart so far. It looks amazing when I get a signal, but the OSSC isn’t getting one from most of my stuff. I have more SCART cables from Retro Access for the Genesis model 2 and the PS1 and PS2 that I don’t have time to check right now. I search online and the only solution for what’s close to what my problem is was to reset the settings, which I did. I also updated to the ossc_0.81-aud firmware. I’m so confused, I hope someone can help me.

    #21958
    NoAffinity
    Participant

    What screen are you using – make and model?

    For the non-working consoles – Is the LCD showing anything, when connected via SCART and set to AV1?

    Have you tried setting to pass-thru or changing line multiplication modes? I believe the default line mode is line2x, and maybe your screen isn’t liking it.

    #21959
    Necrobot20XX
    Participant

    My screen is an RCA UHD 4K TV, I don’t know the model. The NES when hooked up, via the same Scart cable that I used for the SNES and N64, worked all the way up through line 5x mode. All the stuff that didn’t work showed no sync on the OSSC LCD, so I don’t think it’s my TV at all. it seems like the OSSC is not detecting a signal from the non-working consoles.

    #21960
    BuckoA51
    Keymaster

    My PC-Engine cable came with it when I ordered it, so all I know is that it’s a JP-21 cable but I used the OSSC adapter for it.

    Are you sure? JP21 cables are rare outside of Asia. Just because it’s an import console it doesn’t mean it’s necessarily using JP21.

    What type of SNES do you have?

    #21969
    Necrobot20XX
    Participant

    You’re right, the cable wasn’t JP-21 for the PC Engine. The 2 SNES consoles I tried were the original, non-mini versions, one serial number is UN25630692, the other is UN319572106, and if it helps the RGB N64 serial number is NS137880414. I’ll test the other consoles as soon as I can and report back.

    #21972
    Necrobot20XX
    Participant

    I tried the PS1 and PS2 over scart and it worked fine. I tried the Genesis and it worked fine. The PC Engine worked fine after removing the adapter. I haven’t went back and tried the SNES and N64 yet, just haven’t had time. I went back to Retro Access and realized that I could have potentially ordered a cable that wouldn’t work with the N64. This still doesn’t explain why the SNES isn’t working, the cable seems fins since the NES worked.

    #21975
    BuckoA51
    Keymaster

    Yeah at at bit of a loss as to why your SNES’ aren’t working. Trying a different cable is all I can think to say.

    #21995
    NoAffinity
    Participant

    I can say for certain that my snes multi chip would not sync when the ossc was set to a profile I created for my genesis for instance. Make sure you’re starting from default settings for the snes. I also have random no syncs on my snes that I haven’t pinpointed the cause of yet. I jiggle the everdrive, disconnect and reconnect the scart cable a couple times and it eventually works again. My best guess is its one or the other is a dirty connection, but I’ve been too lazy to clean either properly since it is intermittent and resolved itself quickly.

    #21998
    Necrobot20XX
    Participant

    I tried both SNES consoles on the OSSC with the default settings and tried moving the cable around too. I emailed Retro Access to see if they had any idea what could be going on.

    #22025
    Necrobot20XX
    Participant

    I have a couple of updates to post. I got an email from Retro Access that said this.

    “Hi, We’ve been getting a couple other questions like this this week and I don’t know if something has been changed in the OSSC firmware or not (I’m going to ask around) or whether there’s just been a new batch of OSSC sent out so we’re just hearing from more new owners getting used to the settings, but the scenarios are playing out like this:

    1. The cable works (confirmed on one console)
    2. Issues with another device with Nintendo av out

    There are some definite differences between output on different Nintendo consoles, even between different Snes consoles. The voltage on csync tends to differ depending on the board in the snes, for example it’s fairly low on older Snes consoles and runs to 5vpp on 1chips. Mods can bring more variance into the mix especially if they output 75 ohm sync. I don’t know if I should try putting in a higher value resistor, but the OSSC should work with sync signals under 1vpp which the current cable build will bring it to (with resistor in the av out.) There are settings in the OSSC to change the sync settings. Basically, it does sound like the issue is with sync because the picture cuts out on OSSC when you don’t have the right sync range. Can you let me know if you have tried adjusting sync in your menus? If anything fixes this, can you let me know what settings you used? Thank you.”

    I went and messed with all the settings that I understood and the OSSC still said no sync. Before I email them back I was wondering if anyone had an idea of what the setting would be. On a different note, while testing the Nintendo cable with the NES I noticed something new. I don’t know if something is wrong with the system, the cable, the mod, or what but the top of the image starts curving to the left. When I change settings on the OSSC and when I hit the reset button on the NES (just before the screen goes black) the image straightens back out at the top. Here is a picture . Is this part of the overscan area? It seems pretty far down to be, and the Genesis and PC Engine didn’t have overscan areas that big. On the other hand Castlevania and Ninja Gaiden are both all black there above the area with your health and stuff. Any help on these issues is much appreciated.

    #22027
    Harrumph
    Participant

    The first thing I would alter is the sync Vth (sync slicer). This has been mentioned in other threads regarding SNES (iirc people had problems with donkey kong country).

    Regarding the bending on NES, this is normal and is due to the sync jitter.

    Edit: heres a Link to the thread I was referring to. I see now they’re talking about pal snes, but perhaps the problem is still similar on your console.

    #22036
    noodohs
    Participant

    The curving is normal for NES and is, I believe, caused by the jitter in the sync line. Normally, this part of the image is cut off on a CRT, so you wouldn’t even notice it. But when you see the full picture, it’s definitely there. There’s a mod out to fix the jitter issue that will be available on this web site soon, as I understand it. I will be installing it in my NES in the next week or so and can let you know if it helps with that particular issue. I can say that it absolutely helped normalize sync on my SNES, but I never had the issue you are having. It always worked, it just didn’t work on anything above line2x (or at least audio didn’t). Now it does, so that’s something.

    #22040
    Necrobot20XX
    Participant

    Okay, so when I was using the NES and Genesis / 32x / CD, and a game needed to be cleaned or readjusted, the OSSC picked up the signal but just showed a black screen. When I tried changing the sync settings today I tried a different and apparently cleaner game and guess what, it worked… Sometimes the simplest solution is the correct one. I just didn’t have the same problem with the other cartridge based consoles so I didn’t think that could be it. Sadly the N64 still doesn’t work even with cleaning the games and stuff.

    #22042
    NoAffinity
    Participant

    Have you proven that the n64 rgb mod works, prior to testing with the ossc? Possibly a faulty mod?

    #22043
    Necrobot20XX
    Participant

    The OSSC is the only way I can test it. The composite works, so the console is fine. I opened it up and the mod seems okay as far as my limited knowledge goes. The eBay seller has sold quite a few modded N64s all with positive feedback. The listing said tested and working. They even used the same type of Retro Access cable that I bought. N64 is what I was really looking forward to since emulation for it sucks, I hope I can figure something out.

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