The screen looks green. help!

[gigagiga44]

When I connect an arcade PCB with SCART, the screen is greenish. (It looks like red is not output)

I tried several PCBs, but among the PCBs I have, “SSF2X” and “Fighters History” are displayed like this.

“Samurai Shodown” on SNK’s Hyper NeoGeo 64 displays very beautifully.

Is there any solution?

 

[BuckoA51]

What kind of Supergun are you using to connect the arcade PCB? Perhaps the fault is with that if other sources are working ok?

[gigagiga44]

connected JAMMA to the arcade PCB, and the video is output from the control box (board master) using SCART.

By the way, OSSC is said to be less stable for arcade PCBs, and that may be true.
This SSF2X image was output when connected with RGB21 using Frame Meister.
OSSC did not output SSF2X video.
OSSC has very detailed setting items, so I don’t know how to do it properly, but Hyper NeoGeo 64’s “Samurai Spirits” was displayed “by setting it properly.”
There were no problems such as strange colors.

So, in the case of SSF2X, an image was output with Frame Meister, but the signal was received with OSSC, but no image was output.
Also, strangely, in “Fighters History”, even though the signal was intermittent, the image was displayed from OSSC (but it was greenish).
Do I have to change the settings depending on the PCB?

sorry my bad engliash

[marqs]

You can try adjusting clamp offset from video in options. How do you have Framemeister HDMI output connected to OSSC, via some HDMI->VGA converter? Also, which firmware version you are using?

[gigagiga44]

thank you.
Currently, the battery of SSF2X seems to be dead, so I am disassembling it and modifying it so that it can be operated without batteries.
There was indeed an item called “Clamp” in “Video”. To get a look worthy of Hyper Neogeo64’s “Samurai Spirits” I had to set it to -100.
I will try resetting it later.
But it’s strange. The screen turned greenish also happened when I connected RGB21 with Frame Meister.

Connect the “Board Master” and RGB terminal to the OSSC with a SCART cable, without using Frame Meister, and connect to the PCB with JAMMA.

OSSC is Kaico’s 1.7, firmware is 0.90a.

[gigagiga44]

I tried connecting Xbox to OSSC using a component and outputting it.

Xbox screen also looks green!?
Does that mean it’s not a problem with the arcade PCB, but a failure of the OSSC??

Changing the color level of the video option will not fundamentally solve the problem.

[Morpheus_79]

Try testing the VGA input (with an old laptop or something similar). If it’s working fine, it’s most likely a problem with a defective THS7353 video amp (U17).

[gigagiga44]

I tried a VGA connection on an old laptop.
It was displayed correctly. (The image is very blue, but it’s a camera problem)

Does that mean the OSSC is malfunctioning?
What is “THS7353 video amplifier”?
What should I do?

[Morpheus_79]

Does that mean the OSSC is malfunctioning?

Yes.

What is “THS7353 video amplifier”??

I don’t know how similar the the Kaico version to the original PCB design compares… but on the original the THS7353 (U17) can be found here:

It’s a pretty cheap component:

https://mou.sr/3M74dPQ

… and (with a bit of experience) not that hard to replace using hot air.

There’s a lower probability, that C76 could be broken instead of the THS7353… which can be found here:

Since it’s even cheaper:

https://mou.sr/46NY3O9

… and easier to replace, it should be checked first.

[gigagiga44]

Thank you for your very detailed explanation!
I can solder, but since the shipping cost for purchasing the linked item will be high, I will return this OSSC to Kaico and purchase a genuine OSSC.

But I have one question.
The SSF2X image at the top was output by Framemeister rather than OSSC, and I don’t know why it looks green here either.
SSF2X was not output with OSSC, and when I tried it with another arcade PCB (Fighters History), it was output in fragments (it was also greenish. SCART)
I connect it to the PCB with the same JAMMA, but only Hyper Neogeo64 outputs in perfect color.
What could be the cause…

[Morpheus_79]

You don’t have to buy from Mouser. Shipping costs are expensive there for small purchases (especially from outside the US). For such purchases with just a few items i would recommend LCSC:

http://www.lcsc.com/product-detail/Video-Amplifiers_Texas-Instruments-THS7353PWR_C2652733.html

http://www.lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Kyocera-AVX-06035C104J4Z2A_C597193.html

They ship directly from China… but the shipment is fast nonetheless (i’m from Germany and their shipments always arrive in around or less than a week)… and (unlike some other Chinese online shops) they only sell genuine components.

 

The SSF2X image at the top was output by Framemeister rather than OSSC, and I don’t know why it looks green here either.
SSF2X was not output with OSSC, and when I tried it with another arcade PCB (Fighters History), it was output in fragments (it was also greenish. SCART)
I connect it to the PCB with the same JAMMA, but only Hyper Neogeo64 outputs in perfect color.
What could be the cause…

There may be a problem with the output of the red channel, making the Framemeister ignoring it and causing the damage on your OSSC. But i can only assume. Nonetheless: if you are still planning on buying a new OSSC -> be careful with this exact setup since there could be something wrong…

[marqs]

Do you have any other Supergun besides Boardmaster? It sounds like it might have some issue if 2 PCBs have miscoloring also on Framemeister. I don’t quite understand how your Hyper NeoGeo 64 could work fine on the same setup if OSSC was damaged.

[gigagiga44]

>>They ship directly from China… but the shipment is fast nonetheless (i’m from Germany and their shipments always arrive in around or less than a week)… >>and (unlike some other Chinese online shops) they only sell genuine components.

Thank you for your suggestion.
If that doesn’t work, I’ll try to fix it myself.

>>There may be a problem with the output of the red channel, making the Framemeister ignoring it and causing the damage on your OSSC. But i can only >>assume. Nonetheless: if you are still planning on buying a new OSSC -> be careful with this exact setup since there could be something wrong…

In the case of SSF2X and Fighters History, I connect the Board Master to the Frame Meister and output via HDMI.
Not relaying OSSC.

Therefore, I don’t understand why the same phenomenon occurs with Framemeister…

[gigagiga44]

Do you have any other Supergun besides Boardmaster? It sounds like it might have some issue if 2 PCBs have miscoloring also on Framemeister. I don’t quite understand how your Hyper NeoGeo 64 could work fine on the same setup if OSSC was damaged.

Yes, I need to try another supergun.

Now exist small supergun with only the bare essentials.
I really don’t understand if you try that and the same phenomenon occurs.

[gigagiga44]

In the first place, it seems that OSSC’s compatibility with arcade boards is not stable, so may need to use the more stable genuine 1.8 instead of Kaico’s 1.7.

There are arcade PCB output videos using OSSC Pro in Japan, but SSF2X was also output without any problems.

But when will the next OSSC Pro stock

• This reply was modified 11 months ago by gigagiga44.
• This reply was modified 11 months ago by gigagiga44.

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