[OSSC BITFUNX] – Dark display with scart input

[Michael1260]

Hello,

To manage my retro consoles (mostly using SCART), I have two OSSC units (v1.8) BITFUNX

Suddenly, one of the OSSCs started producing a very “dark” output (this happens when using the SCART input; I tested with VGA input and it works fine, though I couldn’t test RCA RGB as I don’t have a compatible console). So, I likely have an issue with the SCART input stage.

I should mention that when I swap the faulty OSSC for the second one in my setup, everything works perfectly (using the same cables).

I reset the configuration to factory defaults, but that didn’t help (and I hadn’t changed any settings prior to the failure anyway).

Upon opening the OSSC, I noticed the SCART port was loose. I replaced it (the new one fits perfectly on the PCB), but that didn’t fix the issue.

I suspect a faulty component in the SCART processing stage, given that the other inputs work fine.

Could someone help me troubleshoot this board?

I have the necessary testing and repair equipment (oscilloscope, soldering iron, etc.).

It’s not very visible (my phone enhances the image), but I’m attaching a photo (from a Matra Alice, a French 8-bit computer from the 80s):

With the other OSSC (same cables) – Very good picture

 

 

Thank you

 

ps: I have the V1.8 schematic and the bill of materials to guide me on what needs checking.

• This topic was modified 2 hours, 43 minutes ago by Michael1260.
• This topic was modified 2 hours, 40 minutes ago by Michael1260.
• This topic was modified 2 hours, 38 minutes ago by Michael1260.
• This topic was modified 58 minutes ago by Michael1260.
• This topic was modified 58 minutes ago by Michael1260.

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