Hey,
I've got a G05-802 in my Omega Race cockpit that's REALLY jumpy, especially vertically (almost looks like rolling from a mis-adjusted vertical hold on a raster), as well as being a small image in all axes (maybe half size). It also looks to be only on the bottom half of the screen, though it looks like the entire image is just shifted very far down, so I don't know that it's truly partial deflection.
I checked the output from the board on my oscilloscope and it looks fine, so I'm pretty sure it's the monitor, and since I had my HV probe handy, I checked the HV and it looks good, so I'm thinking my real problem is with the deflection board.
The frame mounted transistors test fine, and I also checked Q606, Q607, Q706, Q707, and they seem fine, though I've read several places that they frequently test fine, but fail in operation, so I'm thinking of replacing these just to make sure that's not my problem. I also tested Q605 and Q705, and both seemed fine. The caps also tested fine w/ my Cap Analyzer.
One thing I did notice is that C504 (I think?) seems to hold a charge, so it throws sparks when I discharge it... not sure if this is normal. Attached are some pics... the first is one of the entire monitor (to show size), then the others are zoomed to show the image. And no, I didn't move the camera, the vertical blur is a picture of what's actually happening.
Any ideas?
Thanks,
DogP
I've got a G05-802 in my Omega Race cockpit that's REALLY jumpy, especially vertically (almost looks like rolling from a mis-adjusted vertical hold on a raster), as well as being a small image in all axes (maybe half size). It also looks to be only on the bottom half of the screen, though it looks like the entire image is just shifted very far down, so I don't know that it's truly partial deflection.
I checked the output from the board on my oscilloscope and it looks fine, so I'm pretty sure it's the monitor, and since I had my HV probe handy, I checked the HV and it looks good, so I'm thinking my real problem is with the deflection board.
The frame mounted transistors test fine, and I also checked Q606, Q607, Q706, Q707, and they seem fine, though I've read several places that they frequently test fine, but fail in operation, so I'm thinking of replacing these just to make sure that's not my problem. I also tested Q605 and Q705, and both seemed fine. The caps also tested fine w/ my Cap Analyzer.
One thing I did notice is that C504 (I think?) seems to hold a charge, so it throws sparks when I discharge it... not sure if this is normal. Attached are some pics... the first is one of the entire monitor (to show size), then the others are zoomed to show the image. And no, I didn't move the camera, the vertical blur is a picture of what's actually happening.
Any ideas?
Thanks,
DogP