texasmame
Well-known member
Thought this was a monitor issue, but it's not:
http://forums.arcade-museum.com/showthread.php?t=211682
Anyhow, the crawl is slowly to the left or right. All the resistors in the boards video output circuit test within tolerance (R72, 103, 104, 107,108)
If I'm reading the schematic right, A9 and B7 also impact the sync from the board. A9 has already been socketed and replaced but B9 is original. No logic probe here so I guess the next step is to replace those with known good ones.
Help appreciated.
http://forums.arcade-museum.com/showthread.php?t=211682
Anyhow, the crawl is slowly to the left or right. All the resistors in the boards video output circuit test within tolerance (R72, 103, 104, 107,108)
If I'm reading the schematic right, A9 and B7 also impact the sync from the board. A9 has already been socketed and replaced but B9 is original. No logic probe here so I guess the next step is to replace those with known good ones.
Help appreciated.
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