CRT "pincushion droop"

[fuctfuct]

Thought id ask in case any of you know a way to fix this.

The CRT that i play pretty much everything older then a 360 on has this annoying droop in the upper portion of the screen.

Looks like this..



Is this fixable from the service menu or is it something like a bad capacitor/board.. ect. I can get into the service menu but then i am completely lost. I tried messing around with some settings for fun (yes i wrote the original values down first) but its pretty confusing.

Samsung TX-P2734 if that helps

[CRTGAMER]

Agree, should be some where in the Service menu. Be very careful, some have bricked their TVs by using the wrong setting.

Try here: http://www.avsforum.com/avs-vb/forumdisplay.php?f=64

[Zing]

It is likely due to the small form factor and flat screen. This is a "slim-fit" Samsung and probably every single slim-fit model out there has significant geometry issues. This seems fairly well-known amongst TV enthusiasts and the slim-fits are on the "avoid" list.

Once you are in the service menu, you would need to find a setting that affects "upper bow". I suspect that on a set this cheaply made, there will not be one, as it requires certain circuitry.

I wish you luck.

[fuctfuct]

You sure its a slimfit? it not very slim at all hehe

[Zing]

According to the Samsung website, it is.

[Jontendo]

Just some thoughts...

* Usually the geometry settings are grouped together and pretty discernibly named "PINC" or something like that in this case.
* It helps gauge (and tune) adjustment effects if you can display a crosshatch pattern. Many home theater setup discs have this.
* I'm not sure if a pincushion issue on just one side is too typical though. You might have something going in the deflection circuit.

[fuctfuct]

There is a crosshatch pattern in the service menu. I will have a look for PINC settings in a bit.

[Jontendo]

There is a crosshatch pattern in the service menu. I will have a look for PINC settings in a bit.

From the way Samsung names things, if the setting exists, it looks like it would logically be called "V-Parabola".

H-Parabola is documented, but affects the horizontal pincushion (and at both ends simultaneously only).
Some Samsung geometry lables/examples here:
http://dc218.4shared.com/doc/0emLHyyh/preview.html
(Section 3-5)

So, no guarantees that it's correctable through the menu. Hopefully though...

[fuctfuct]

Interesting, thanks. I haven't had time to mess with it yet.