"Wobbly" corner picture on PVM-2530 monitor

[drunkninja24]

So I got myself a PVM-2530 recently and am loving it, but have one minor annoyance with the picture. In the upper right corner, I'm getting this slight "wobble" effect on the picture:



None of the geometry adjustments seem to help. Would this be something perhaps a cap replacement or something along those lines could fix?

[fagin]

Assuming its not console specific (sync issue), it could either be a magnetic or chassis issue.

[drunkninja24]

Assuming its not console specific (sync issue), it could either be a magnetic or chassis issue.

yeah, this happens no matter what is plugged in.

[gray117]

does this wave wobble when the screen is still or is it kind of constant?

Perhaps as suggested try moving the tv to see if there's just a hunk of metal/wire/random something in the building effecting magnetic field. Is it next to another monitor or speakers?

Does this occur with all inputs and different cables?


If none of the above offer any insight; then yes you might start looking inside...

It might be a gain/strength issue with the beam which might be elevated with one of the neck pots -no particular insight in this other than I once had something a little similar with a pvm - but I was just fiddling ...

Another thing you'll probably notice is that your pvm probably has more caps than a typical arcade monitor; making it difficult to identify something that isn't broke and simply replacing all of them a time consuming issue that might not solve the problem.

A bit of research might narrow down which pcb/area might be a likely suspect...

Oh one thing to mention is did you access the service menu or just using standard menu? ... Pvms have extended normal menus often, but still have a service menu too with more options...

[drunkninja24]

Yeah, moving the monitor and my speakers around change nothing, I still have that wobble in the corner, and yeah, it's on all inputs.

[mchay]

The easiest way to hide this problem, if the problem doesn't go further than the edge of the picture, is to have a little bit of overscan.

[viletim]

drunkninja24,

Your options:

1) Just put up with it. (recommended)
2) Turn the contrast down.
3) Find a good television tech to fix it for you. (difficult)

This is a (very, very minor) fault. It cannot be fixed by adjustment.

[fagin]

It cannot be fixed by adjustment.

Why wouldn't hori width adjustment fix that issue?

The image above already appears to be underscanning, so width adjustment to overscan would "hide" the problem would it not?

[mchay]

I would also be of the opinion that an image on a 4:3 monitor should go edge to edge and therefore hide this very minor fault.

[ikaruga007]

But it's also possible that new caps would fix that problem.

[gray117]

I would also be of the opinion that an image on a 4:3 monitor should go edge to edge and therefore hide this very minor fault.

But it's also possible that new caps would fix that problem.

If the very slight wave here is not actually wobbling/moving or causing anymore distortion across the screen then I would actually agree that this is quite normal and that horizontal adjustment is all that's needed, and it's actually quite a good picture convergence wise et al.

If effects are more widespread than they appear from just the pic, and/or horizontal adjusts are maxed or causing unwanted effects when they are adjusted, then perhaps there's something else going on and that repairs are in order...

The thing is, if this is simply a slight, constant, deflection issue I don't think caps can/will effect it at all.

[cyborc]

I had a similar thing on my pvm. I simply adjusted the horizontal size to hide it.

[drunkninja24]

Okay, sounds good, thanks for the thoughts/suggestions. Can't necessarily adjust the picture dimensions too much simply because I have to have it at some kind of happy medium for all my different systems which tend to have different sizes on the screen. I was just curious if there was a simple fix to straighten that picture out.

[ninn]

Did you calibrated the monitor with test pattern, preferable linearity? Or do you do it with your naked eye?

Reason I am asing: I got a similar problem, and it vanished once i calibrated it with the free genesis-testpattern-rom. There was a sweet spot, where lines looked nice - the previous setting, which was done mainly to fit the picture exactly to the border (bigger = better!!!111) was way worse (ang got problems at the top of the picture).