FIXED:!! Monitor PCB problems

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Posted by Tom A. on 26, 2000 at 7:02 PM:

In Reply to: Tech: Monitor PCB problems? posted by Tom A. on 13, 2000 at 7:02 PM:

I fixed it! I discharged the tube but it never ever made a popping sound but I made sure I touched the anode wires with the screwdriver and no pop. I couldn't figure out how to disconnect the monitor pcb from the tube so I just took the unit out in one piece...tube and all. I soldered a few joints that I thought looked possibly bad but in retrospect, they were just flux marks. What I should have done was buy a magnifying glass and inspect each solder joint carefully. No, that would have been too easy. ;-)

After I "fixed" the couple "suspect" joints I fired it up and it still didn't work. I was a bit discouraged and quit for the evening (Friday). Saturday I went to a local TV/VCR repair place and asked them if they would work on it, they weren't interested in looking at it unless it was a TV or VCR. I called an arcade shop and he said he could look at it if I had the monitor schematic...well I don't.

So, I figured what do I have to lose except a lot of time? I refluxed each and every solder joint (except the ones that had no components attached) and although it took most of Saturday, I did it and when I fired it up nothing caught on fire and the vertical jitter is gone. Toward the end of the soldering process I did see what looked to be a small (very small) crack on one of the solder joints for a capacitor. I expect this was the culprit but I decided to just finish 'em all. That's why I think I should have bought a magnifying glass and inspected better.

Oh well, it's done and works! Now, the only problem I have with the monitor is a very, very slight horizontal swaying or jitter if you will. I believe I have always had this but it was inconsequential compared to the vertical jitter. I need to see if it does it when it's hot/cold etc. but for now I'll just lay low for awhile and enjoy some games.

Anyone have an idea what may be causing my slight horizontal jitter. I wonder if it could be the cap's?

-Tom A.

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: I fixed it! I discharged the tube but it never ever made a popping sound but I made sure I touched the anode wires with the screwdriver and no pop. I couldn't figure out how to disconnect the monitor pcb from the tube so I just took the unit out in one piece...tube and all. I soldered a few joints that I thought looked possibly bad but in retrospect, they were just flux marks. What I should have done was buy a magnifying glass and inspect each solder joint carefully. No, that would have been too easy. ;-) : After I "fixed" the couple "suspect" joints I fired it up and it still didn't work. I was a bit discouraged and quit for the evening (Friday). Saturday I went to a local TV/VCR repair place and asked them if they would work on it, they weren't interested in looking at it unless it was a TV or VCR. I called an arcade shop and he said he could look at it if I had the monitor schematic...well I don't. : So, I figured what do I have to lose except a lot of time? I refluxed each and every solder joint (except the ones that had no components attached) and although it took most of Saturday, I did it and when I fired it up nothing caught on fire and the vertical jitter is gone. Toward the end of the soldering process I did see what looked to be a small (very small) crack on one of the solder joints for a capacitor. I expect this was the culprit but I decided to just finish 'em all. That's why I think I should have bought a magnifying glass and inspected better. : Oh well, it's done and works! Now, the only problem I have with the monitor is a very, very slight horizontal swaying or jitter if you will. I believe I have always had this but it was inconsequential compared to the vertical jitter. I need to see if it does it when it's hot/cold etc. but for now I'll just lay low for awhile and enjoy some games. : Anyone have an idea what may be causing my slight horizontal jitter. I wonder if it could be the cap's? : -Tom A.

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