Mis-aligned color

[lnx64]

When I first got the TV I had to turn the red guns up because the picture was green tinted so who knows maybe the red gun is going weak

[mstaton]

Do you have a CRT tester?

[lnx64]

Nope, but if someone here in Florida does and knows how to use it, I'll be happy to let them run a test.

[mstaton]

That's the ONLY way to find out for sure.

[lnx64]

Ok. For the time being I got some test patterns run on it, and calibrated tint and color controls.

http://img.photobucket.com/albums/v3...n/IMG_0491.jpg

http://img.photobucket.com/albums/v3...n/IMG_0495.jpg

Convergence isn't all that bad, but the color bars do seem a little strange on the transition between colors..

[miniman82]

Nothing wrong with this set that I can see...

[lnx64]

Meh, maybe I'm just looking too far into it because of the flyback problems. I'm probably looking for flaws when I should just be enjoying it.

[ctc17]

You will never see bleed with an ntsc generator, you need a simple color bar generator to see the offset. Also you can't set the tint with your generator and expect it to be consistent with all your sources because the burst frequency will never be exactly the same between sources.

[earlyfilm]

Originally Posted by lnx64

http://img.photobucket.com/albums/v3...n/IMG_0491.jpg
http://img.photobucket.com/albums/v3...n/IMG_0495.jpg

Convergence isn't all that bad, but the color bars do seem a little strange on the transition between colors..

From your descriptions, you probably have a weak CRT, but that is not causing this problem.

I'm seeing a very faint ghost or ringing.

This trailing ghost is also in the B&W convergence chart so that eliminates the color circuits for now.

Ghosts can create or exaggerate an existing minor color smear.

Don't waste time on on the game source, as these usually have crappy color.

Test the signal source you used for the two test patterns on a modern set. Can you still see the single ghost there?

If so, check your connecting cables and the source.

If not, connect it back to the old set with using a signal attenuator.

If you don't have an attenuator, try adjusting the AGC on the TV, as a slight signal over load can cause this. Also check the fine tuning. If it is off slightly, that too can cause ringing.

This is a general trouble shooting example. I cannot be too specific, as this TV is newer than I'm use to working on.

James.

[holmesuser01]

Have you tried a different cable between your source and the set?

I used to service rental TV systems... I could tell some tales there, but I digress... The customers would kink the cables often just to have the company send us out... Or, rip the cable end connector off, and scream at the company until I came out, and often demand a reduction on the rent for the week, etc....

The picture on your set looks pretty good for a set of this vintage.

[holmesuser01]

James answered while I was typing...

WHAT JAMES SAID!!

[lnx64]

I don't want to take apart the TV right now so I'll try and attenuate it externally. The TV also has 300 ohm screws, could I just use one of those adapters, 75 ohms to 300 ohms to attenuate the signal, since they would have slightly signal loss?

EDIT: Actually, on the Hitachi, there's some ringing too: http://img.photobucket.com/albums/v3...n/IMG_0226.jpg

But it doesn't bleed it's colors unless the contrast is cranked up, cause IT does have a weak CRT.

EDIT: Tried different cables, all same results. I even tried cables I made, using RG-6 with compression fit ends.

[earlyfilm]

Originally Posted by lnx64

The TV also has 300 ohm screws, could I just use one of those adapters, 75 ohms to 300 ohms to attenuate the signal, since they would have slightly signal loss?

EDIT: Actually, on the Hitachi, there's some ringing too: http://img.photobucket.com/albums/v3...n/IMG_0226.jpg

If both sets have the ghost then suspect that the cause of the trouble is in the signal generator. You need to get rid of the ghost before worrying about the color.

The 300 ohm adapter probably wont help, but since it is a quick and easy test, I'd try it.

Do you have a transfer switch or two-set coupler between the signal generator and the TV? Either would be a prime suspect.

A reflected signal like this ghost is usually caused by an incorrectly terminated connector, or by overload, or by both.

[Eric H]

Some sets were imperfect when they left the factory, probably more true of a once low end brand like Samsung.
This set seems to be performing pretty well actually, I think you might be chasing problems that there is no solution for.

Possibly a complete alignment of the video and chroma circuits might help but that's going to require the services of someone with the knowledge and equipment to do it.

[old_tv_nut]

Looks to me like crappy luminance channel / delay line design combined with narrow-band smeary chroma. Could be something actually wrong around the delay line, but probably they were all like this. Fiddling with chroma alignment *might* reduce the chroma smear somewhat also, but I wouldn't bet on it.