I have a black shadow in my monitor screen can i get rid of it?

[berlincam86]

I have a megatouch super 4 bartop arcade game and I have this black shadow in the upper right corner. Will i be able to get rid of it? And how? There are a few new caps on the chassis but not all of them.

[qrz]

if the individual convergence/purity rings have NOT been moved , the ring assembly may need to be repositioned.

however, i think the convergence has been altered, as it does indeed appear to be misadjusted........

first step is to deguass the crt .
to align , begin with a mirror and a crosshatch or dot pattern on screen.
note :  >>> DO NOT TOUCH THE RED WIRE ON THE PICTURE TUBE<<<    20-30KV PRESENT !!!!!!!!
adjust the rings to bring red,blue and green lines into alignment observing the reflection ( mirror)
the original ring position may be factory marked- (making realignment easy- line up the marks)
the same can be done to return the rings to a starting position for practice (or if in doubt)

qrz

[shilmover]

to align , begin with a mirror and a crosshatch or dot pattern on screen.
note :  >>> DO NOT TOUCH THE RED WIRE ON THE PICTURE TUBE<<<    20-30KV PRESENT !!!!!!!!
adjust the rings to bring red,blue and green lines into alignment observing the reflection ( mirror)
the original ring position may be factory marked- (making realignment easy- line up the marks)
the same can be done to return the rings to a starting position for practice (or if in doubt)

qrz,

That reminds me of a question that i have been meaning to ask but keep forgetting...  Can you touch the rings while the monitor is on?  Have not had to do it, but just in case I ever do.

[qrz]

yes, and that is the way to make the adjustment.

the set must be operating .

a good rule of thumb for working around high voltages is to do so with one hand behind your back.

and BE CAREFUL.   > don't fear electricity , but you must respect it !!<

qrz

[berlincam86]

Ok ill give that a try after work. Ill get back to you if it doesnt work. Thanks.

[berlincam86]

ok i tried that and nothing happens. Any other suggestions?

[ChadTower]

Try a good degaussing.

[berlincam86]

Did that too. There is a switch on the little remote circuit board and i have used it a couple of times and it does nothing.

[ChadTower]

It does nothing or it doesn't solve your problem?  If it does nothing, it's not functioning.

[berlincam86]

Oh, yes, it does the degaussing but doesnt do anything to the shadow.

[grantspain]

do you get the same with a blank raster(no signal connected),if so could be a damaged tube

[berlincam86]

when i pull the rgb and sync wire harness the screen goes to a green color and yes the shadow is still there.

[berlincam86]

On some screens i dont see it but if its a purple screen or green i can see it good. It doesnt seem to show with a red or blue screen. Or of course i cant see it with a black screen.

[grantspain]

so if you disconnect the green video input you don't get this shadow?

[qrz]

berlincam86, a pm is en route.

it should help a bit

qrz

[berlincam86]

Yes i got it i will work on it as soon as i can and ill let you know what happens. Thanks alot for the help.

[berlincam86]

Just to let anyone know who cares. The problem was solved. the shadow happen to be something with the deflection yoke itself. I happen to move it while i was screwing around with the convergance and it went away. the wedges are not in there very well but they are glued so i put a piece of paper in there to keep the deflection yoke still(I hope this is ok to do). I still have purity and convergance problems but i dont have a pattern generator to do that. I have it kind of close but its still not right. Maybe ill take it to a tv repair man to have that done. Thanks guys for all your help.

[qrz]

all u need is a stationary pic . try one of the service screens.
if u have the yoke correctly positioned, insert the rubber wedges and seal in place with a bead of silcone rubber.
once dry , then tackle the convergence . suggest marking a line accross the rings for a reference .  why ?
just line up the mark to return to the starting position. 
aligning convergence is not hard with practice .

qrz

[berlincam86]

qrz i got another problem with another monitor can you help me?