Need help with CRT calibration

[atheistgod1999]

I asked this before in the FOTODT and QTDNDAT threads, but no one answered them.

Anyway, I have this mid-end 2003 Toshiba set (27A43) that has this weird issue with RF and S-Video where the Y, Pb, and Pr are slightly offset:

Look at the blue outline at the left end of Mario's cap, and the green spot after Mario's nose.

And I recently got a Toshiba 27AF44 that looks absolutely fantastic, and has great reviews, but the horizontal linearity leaves something to be desired.

Anyone know how to fix these?

[atheistgod1999]

Why can't anyone answer this?

[Einzelherz]

My reason is that I really don't understand your question.

Are you using RF or S-Video? Why are you mentioning YPbPr?

If the first answer is yes, then it's likely that there's noise and your comb filter isn't perfect.

If the first answer is "no, I'm using component cables" then your tube's guns have an issue.

[Ikaruga11]

My reason is that I really don't understand your question.

Are you using RF or S-Video? Why are you mentioning YPbPr?

If the first answer is yes, then it's likely that there's noise and your comb filter isn't perfect.

If the first answer is "no, I'm using component cables" then your tube's guns have an issue.

He's probably using S-Video.

[atheistgod1999]

I mentioned YPbPr because that's what every input besides RGB carries, just with modulation and other stuff depending on the input. I used S-Video (official) cables for that picture. Composite and component inputs don't have that issue.

[NJRoadfan]

Its likely you have to fine tune the convergence. The factory service manual details the process and you run the risk of screwing things up even more.

[bobrocks95]

Only high-end BVMs can adjust the horizontal linearity I believe. Don't think you can fix that on any consumer set.

Is the S-Video problem the same with different sources? And doesn't affect component or composite from the same source? The answer really is just use component, or try another set of S-Video cables. If it isn't reproducible for different sources, the problem is the cable.

[Shoryukev]

Back before I had my PVM I was using s-video for all my consoles, and I remember very clearly that I had problems with s-video with my SNES/N64/GC. Does your s-video cable also have composite video, or is it only s-video?

If your cable has both s-video and regular composite, you get a lot of noise in your signal. I don't remember exactly, but it was something along the lines of the additional video cable you're not using acting like a big antennae for interference. I bought an s-video only cable off ebay from some guy in Poland or Sweden who hand-makes them and all my problems went away. Supposedly you can take apart the cable at the console connector end and snip the wires to the composite video and it will fix it, but I was lazy and bought another cable.

Mine had this same issue, but I could also see some other noise like diagonal lines on any large patches of solid color on the screen. I also used s-video with my RGB-NES for a long time and the signal noise drove me nuts until I figured out the problem.

[Einzelherz]

I mentioned YPbPr because that's what every input besides RGB carries, just with modulation and other stuff depending on the input. I used S-Video (official) cables for that picture. Composite and component inputs don't have that issue.

I may be vastly wrong but only component cables carry YPbPr. Rf and composite carry RGBs and s-video splits the sync onto a separate line.

Your set is having trouble separating the signal properly. It apparently separates the composite signal better.

As others have said, professional monitors have settings to tweak the s-video filtering but with a consumer set, you gets what you gets.

[Shoryukev]

Basically s-video has 4 pins, two are ground. The other two are luma+sync (aka Y) and chroma for all colors.

Component has 3 signals instead of two, but is otherwise fairly similar. Y is the same (luma+sync), but Pb and Pr are the difference between the luma signal and red and blue. Green values are deduced based on what it knows about the other two.

From what I understand (which is limited), the main difference between the two standards is that with YPbPr you get enough separation in the colors to where the signal is almost identical when extracted as it was before it was encoded (keyword being almost, most of us are picky enough to notice at least a difference in white balance). With s-video there just isn't enough available bandwidth to make this possible, so there is some noticeable degradation in the picture quality.

Basically (in English) there isn't much difference between the way the two cables operate, YPbPr is just better.

[atheistgod1999]

I may be vastly wrong but only component cables carry YPbPr. Rf and composite carry RGBs and s-video splits the sync onto a separate line.

IIRC, chroma is modulated Pb and Pr. S-Video carries Y and modulated Pb and Pr, composite carries combined S-Video, and RF carries modulated composite along with other things. S-Video splits the chroma onto a separate line.

And in response to Shoryukev:

I'm using an official Nintendo S-Video cable. I also checked this with my PS2 by looking at S-Video and component in the same game, and S-Video had the same issue.
The reason the ones with a composite cable have "noise" is because they're wired incorrectly; luma is connected to the composite pin. The "noise" is the chroma signal on the luma pin being read as luma info.

[Einzelherz]

Yes, like I said it splits off the RGB. I misspoke when I said sync, intending luma which happens to also be sync.