XM-2001N rainbow color issue and others

[elkameleon]

Hey, long time reader, first time poster. I picked up a Playchoice 10 a few weeks ago, and it has a problem with the top monitor. Its all rainbow colors, and part of the top kinda gets smeared to the left. I installed a cap kit hoping it woul fix the issue, but its still all rainbow colored. The wierd smudging on the top did go away, but once it warms up, it comes right back... i'm at a loss as what to do.

[lilshawn]

degauss is what your looking for. that gets rid of rainbows.

as far as your tear in the top goes, if you post up what monitor is in there, and what parts you have changed in it, we can be of better help. likely you have a component that goes out of specification once it warms up. (a resistor or another cap.)

[elkameleon]

I did notice a transformer that looked scorched and the area around it on the board was black, when I was installing the cap kit. I beleive it was marked T602 "H. DRIVE".

[MKFan4Life]

Like lilshawn said, the best way to get accurate help is to find out what model your monitor is and post that so people with previous experience with that type monitor or ones who have a schematic can REALLY help you isolate the problem.  And some chassis models can have components labeled the same as yours, but be different components altogether.

Your degauss circuit might be faulty (more modern monitors let you degauss manually), but I think most arcade monitors do it on start-up automatically.  Some people resort to using a strong magnet and waving it around like a magician... lol... well, they have several preferred ways they say it SHOULD BE DONE near the screen to normalize the colors again.  I think some people have said to start making circles close to the screen, around and around, and move farther and farther away from the screen until the magnet no longer affects the display.

I can say I have fixed a similar issue with a Commodore computer monitor this way with a strong magnet-mount CB antenna.

You might even find that your little 2-conductor wire attached to the chassis (coming from the degauss wire around the tube) has come loose.  If you know where to connect it back, you can simply plug it back up either way around (makes no difference I believe) and it may degauss on next power-up.

[elkameleon]

I can't beleive I never updated this topic way back when! Anyways, this particular monitor still has this same issue, its a Sharp XM-2001N. As far as a schematic goes, you can find it at http://www.mikesarcade.com/arcade/monitors.html. I'm aware it needs a manual degaussing, but it's still tearing across the top as the monitor warms up. Since it's been a few years since I got it, and i've learned a bit more about these things, i'm led to believe there's an issue in the horizontal deflection circuit. Any more help would be appreciated, thanks in advance!