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| 512k Analog Board Distorted CRT |
Posted by: jasonfortheworld on 2025-06-23 18:48:44
I've got an extra 512k analog board that I've been saving for a repair and I finally got to it today. I recapped it and reflowed all the connections, but I still get the same extremely distorted and flipped upside down video on the CRT. Check out the photo to see the stretched and upside-down video I get.
I know the analog board is definitely the problem as this machine works perfectly with a different board.
Dead Mac Scrolls suggets a few different components might be the culprit, but I didn't see anything specific to this issue. Especially the flipped upside-down part. |
Posted by: bibilit on 2025-06-24 04:59:06
Probably related to the yoke part of the Analog Board, and more commonly the vertical sweep generator (fig 3)
Q1 or Q2 maybe. |
Posted by: jasonfortheworld on 2025-06-24 08:47:55
Probably related to the yoke part of the Analog Board, and more commonly the vertical sweep generator (fig 3)
Q1 or Q2 maybe. Dead Mac Scrolls also pointed me in that direction. May as well get a parts list and start swapping to see what happens. |
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