Brightness problem MS-2930

[nem]

If the capacity is the same, but the voltage higher no problem, am I right?

Correct.

Are there some specific ones for geometry or should I replace all?

Personally I would just swap them all. Just make sure you put in what you took out. Cap kits can include wrong caps, don't trust them blindly.

[LarsVegas]

Ok, good to have a desoldering iron. For shure, i'll take care of putting in the right ones. Have done a couple repairs on pinball machines, so I'm confident. Hopefully this cab will stay to his name and blast me away afterwards with a great picture.

[LarsVegas]

Changed all the caps from the cap kit. Except the orange one and those 2 or 3 big ones. Fired up the screen and got a new picture. The Geometrie was completely different. See the picture below. Tried to tweak pincushion and para but the pots do nothing. When I tweak pincushion the picture is flickering and snaps back to the old position. Para is doing nothing. The other ones like trapez are doing their job. What should I check next?

[LarsVegas]

Here the picture

[grantspain]

try adjusting the h.s lim pot and are you adjusting the correct spc pot

[LarsVegas]

I have made the picture smaller to see better the result. The picture will fit the whole screen, when adjusting the pots on the remote. HSL is doing nothing as well. Yes, I have done both spc pots and both do nothing.

[LarsVegas]

Checking for cold solder joints right now.

[LarsVegas]

Haven't found something yet. All soldering seems good, got continuity, but I will check every again. Found two legs of U451 are together with solder. Is this normal? Maybe some solder dropped off.

[grantspain]

remove that solder from the legs, that has obviously fallen from when you did the caps

[LarsVegas]

Is this ok, or must this go in deeper? Haven't seen how deep it was in, when discharging. It popped off right away.

[grantspain]

grip the cup and pull the red cable and it pop back in

[LarsVegas]

So the metal clamp has to go all the way in? The first part is already in, like me in the attached picture and the rest looks like it won't fit, I have to do it with force

[nem]

No, it should go in as far as the 'solder lock'. So that part should not be visible.

[LarsVegas]

It does not fit, even if I press those together as close as they get. Even if I push it a little bit further, the rubber cab lifts up.

[grantspain]

why have you pulled the cable further the opposite way, its simple enought to do- you just grip the cup with one hand and then pull the flyback side of the cable and manoeuvre the clip into place

[LarsVegas]

Yes, I did. Didn't move anything further. Pressed those clip together put it in and now it holds tight. I'm just unsure if it was all the way inside, or like in the picture above. Just lifted the cup to show you how deep it's in.

[grantspain]

that clip is in far enough, as long as its home and solid then its fine

[LarsVegas]

Thanks, that's all I wanted to know. Removed the solder and it is working again. Tweaked the geometry and it is amazing. Will set the colors later and try convergence strips. Awesome thanks very much guys.

[grantspain]

yeah looks great

[LarsVegas]

So, tweaked the geometry and the colors. Everything looks good. All colors are back and nothing is faded anymore. All corners were off, cause of convergence. Used strips to solve the problem. On the left side I got good results, the right was impossible to fix, even with more than one and on the top i couldn't get deep enough with the strips. But overall I'm very happy with the result. Thanks alot grantspain and nem for your help. Job done and I will enjoy this awesome new screen.