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Saturn Japanese saturn picture werid

bart_simpson

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Aug 10, 2019
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Hia I have a saturn that came in for me to repair as far as I know not modded at all
Stock Japanese system with a/v cable
And get a like if video mode is messed up or something any ideas be greatfull.
 

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segasonicfan

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Jun 8, 2019
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definitely look at your chroma encoder circuit (CXA1645 near AV jack). Likely your 220uf output caps for CVBS Y, or C are going bad.

If you have an RGB or SCART cable its also a great way to rule out other issues. its an issue with your color burst (NTSC / PAL only, sometimes its also a bad clock pulse going to the encoder. Thats a lot less common tho.
 

bart_simpson

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Aug 10, 2019
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Ah nice one thanks for your reply I will take it apart a bit later and check it over.
 

bart_simpson

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20210520_134753.jpg
 

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gorgyrip

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I don't have experience with the saturn, but when I see this on a snes, it means i have to replace the caps after the encoder.
 

Tokimemofan

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May 30, 2019
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I would check for cold solder joints first, I’ve had a few units come my way that died from taking a hard knock. If you find one there’s probably hundreds more under most of the components on the board. Best to rule that out before trying to fix a dumpster fire
 

Trimesh

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Could be bad caps - could also be a bad clock synth PLL, especially if it's the square one.
 

bart_simpson

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The board is a va7 Japanese console
 

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