rvIceBreaker
New member
Hey all,
Friend of mine bought a cabinet for Lethal Enforcers, and being a light-gun game we want to get the CRT running.
We've already swapped the Flyback since the original popped a hole through its housing, and we've installed a cap kit in it.
We can get picture from it, however its suffering from a strange issue that we can't seem to find any information on.
The picture is offset halfway off the left side of the screen and loops around to the right side of the screen. On top of that, its jittery as all hell.
The horizontal positioning jumpers had no effect on the position of the image.
I have other WG/Zenith boards I can pull parts from (unsure of their actual health), and I've swapped IC2 (LA7823) thinking it might be related, as well as C18 and C19 since they seemed to react to thermal changes (spraying with air duster to cool it).
What we haven't done yet is replace the pots (VRxx), voltage regulator (IC4), HOT (Q11) or H Drive (Q10).
I also don't have a multimeter I'd necessarily trust in a higher voltage circuit so we haven't probed for voltages at all, not to mention we're a bit leery of sticking our hands into a running CRT.
Another strange problem is that whenever the V and H syncs start to become in-line with each other, the picture will drop out and it fades to black. The only way to get the signal to come back again is to force it out of H Sync, then re-sync it back to its offset position.
Does anyone have an idea of what could be the most likely culprit? We're stumped for ideas.
Here is a video of the issue we're having
Friend of mine bought a cabinet for Lethal Enforcers, and being a light-gun game we want to get the CRT running.
We've already swapped the Flyback since the original popped a hole through its housing, and we've installed a cap kit in it.
We can get picture from it, however its suffering from a strange issue that we can't seem to find any information on.
The picture is offset halfway off the left side of the screen and loops around to the right side of the screen. On top of that, its jittery as all hell.
The horizontal positioning jumpers had no effect on the position of the image.
I have other WG/Zenith boards I can pull parts from (unsure of their actual health), and I've swapped IC2 (LA7823) thinking it might be related, as well as C18 and C19 since they seemed to react to thermal changes (spraying with air duster to cool it).
What we haven't done yet is replace the pots (VRxx), voltage regulator (IC4), HOT (Q11) or H Drive (Q10).
I also don't have a multimeter I'd necessarily trust in a higher voltage circuit so we haven't probed for voltages at all, not to mention we're a bit leery of sticking our hands into a running CRT.
Another strange problem is that whenever the V and H syncs start to become in-line with each other, the picture will drop out and it fades to black. The only way to get the signal to come back again is to force it out of H Sync, then re-sync it back to its offset position.
Does anyone have an idea of what could be the most likely culprit? We're stumped for ideas.
Here is a video of the issue we're having


