Saturn Japanese saturn picture werid

[bart_simpson]

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.

 

[segasonicfan]

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]

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

 

[bart_simpson]

 

[bart_simpson]

Plus this is with rgb

 

[gorgyrip]

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]

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]

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

 

[bart_simpson]

The board is a va7 Japanese console