PS1 NTSC signal have distorted colors on old samsung lcd tv

I have a modded Pal PsOne slim model. If i hook it up to my Samsung TV (It's an old M86, "PAL" of course) with an RGB cable to the RGB input Scart the colors are all distorted. This happen only while I'm using an NTSC game(or during the boot menu that start in NTSC with the mayumi installed). With the same console/cable/game setup to another tv I get the correct colors... If I use a PS2 nothing of the sort happen... The NTSC games have correct colors... So why are the colors a mess only with the PS1 in Ntsc and only on this TV?

 

it's a sync issue for sure, Samsung TV's are picky about it.

 

I suppose then that the PS1 and the PS2 output different signals...

 

actually they do, depending on what you have selected in the bios menu. my issue was reversed my ps1 looked great with luma for sync, ps2 looked like dog shit lol. try changing your sync source.

 

Samsung Tvs are very picky with sync

 

The new signals PS2 added are for component video (often called YPbPr). PS1 hardware doesn't output that.

Anyway I think PS1 and PS2 handle playing PS1 imports differently.

 

Yeah I forgot to write "different NTSC signals".

So... Should I try with another PS1 and see what happens?

 

No, check what sync your cable is using. And if it's using composite for sync, try changing it.

 

Composite has Chroma carrier in it and some monitors won't strip properly (or at all) and you will have artifacts on the screen. Some monitors are so picky even changing to Y isn't enough. Unfortunately PS1 and PS2 are designed with TVs in mind. Samsung was trying to save money by skimping on a sync stripper on the TV sync input circuitry. heh

 

That sounds pretty lazy.
I thought CVBS sync is the standard for scart. As in, anything else isn't in the strictest sense scart compliant?

 

TVs are supposed to strip everything from the signal and only care about the sync. So yes, I suppose that was lazy on their part.

 

Well I don't have a copy of the proverbial scart book to be sure what the standard says.

 

The fact is that on SCART/PERITEL standard each pin has context based functions and CVBS shares the same pin with CVBS. So it only makes sense you expect the TV has to be able to function with CVBS as SYNC.

On the other side, dedicated monitors (like for example Japanese RGB21 monitors or computer monitors) are not required to strip the sync.

 

This looks like the color is shifted from the intensity. That's a very odd thing to happen in an RGB signal. Or is it actually just composite decoding?

 

I meant that I believe providing a SCART input with already-stripped sync is actually wrong. CVBS appears to have been the standard's only defined form of sync.

 

Sync is the only thing the TV will use. All the rest is ignored since it's coming from the R,G and B wires and in higher quality, even.