LyonsArcade
Well-known member
Hi Guys!
I hope somebody can help me figure this out. I have a wells 25" monitor that i'm having trouble with. Originally, I had the monitor working fine, but it had a really, really bad spark coming from the flyback which had some cracks in it. I mean like Frankenstein sparks, you couldn't leave it on but a few seconds and you'd have fireworks.
So, I replaced the flyback. Fired it back up, and I now get a really blurry screen. Essentially the monitor is displaying the correct images, but you can't even come close to tuning them in with the screen control. so I checked to make sure I put the correct flyback in, and the numbers match up fine.
I recapped it, it still looks exactly the same. I replaced the hot, it still looks exactly the same. I checked for bad solder joints and reflowed a bunch of resistors, it still looks exactly the same. I replaced IC4 (voltage regulator) and it still looks exactly the same. I replaced the vertical chip on that tall heat sink, (can't remember the ic #) and it still looks exactly the same.
On the large white resistor, i'm getting about 150V on the far side, and 130v on the front side. That sounded about right to me for a 25", although i'm not sure about that 150V.
Anybody have any clue what I should be looking for? I'm thinking I may have a resistor that's opened up, would that be a place to start? I tried another working wg71XX board set on the tube, and it works perfectly.
I hope somebody can help me figure this out. I have a wells 25" monitor that i'm having trouble with. Originally, I had the monitor working fine, but it had a really, really bad spark coming from the flyback which had some cracks in it. I mean like Frankenstein sparks, you couldn't leave it on but a few seconds and you'd have fireworks.
So, I replaced the flyback. Fired it back up, and I now get a really blurry screen. Essentially the monitor is displaying the correct images, but you can't even come close to tuning them in with the screen control. so I checked to make sure I put the correct flyback in, and the numbers match up fine.
I recapped it, it still looks exactly the same. I replaced the hot, it still looks exactly the same. I checked for bad solder joints and reflowed a bunch of resistors, it still looks exactly the same. I replaced IC4 (voltage regulator) and it still looks exactly the same. I replaced the vertical chip on that tall heat sink, (can't remember the ic #) and it still looks exactly the same.
On the large white resistor, i'm getting about 150V on the far side, and 130v on the front side. That sounded about right to me for a 25", although i'm not sure about that 150V.
Anybody have any clue what I should be looking for? I'm thinking I may have a resistor that's opened up, would that be a place to start? I tried another working wg71XX board set on the tube, and it works perfectly.
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