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| SE/30 Bright Vertical Edge |
Posted by: lubert on 2025-08-10 14:57:04
After replacing the 7905 and BU406 on the analog board in the hopes of reducing some screen wobble, the display started showing a bright and stable vertical line on the right edge. The Dead Mac Scrolls mention replacing the BU406 would fix a bright (but wiggling) right edge, so I'm wondering if the replacement BU406 was bad as well.
Has anyone seen anything like this before? Appreciate any help! |
Posted by: shirsch on 2025-08-11 06:40:50
Try playing with the width coil and horizontal positioning. |
Posted by: bibilit on 2025-08-11 08:16:10
Never seen before, but looks like you are having a foldover on the right edge ( round corners are missing) |
Posted by: lubert on 2025-09-06 15:30:04
As an update, I replaced the BU406 with a BU406D and that fixed the issue! Thanks folks for the replies. |
Posted by: obsolete on 2025-09-06 21:22:54
Thanks for documenting your experience! Glad to hear you got it fixed |
Posted by: Byrd on 2025-09-06 23:35:04
As an update, I replaced the BU406 with a BU406D and that fixed the issue! Thanks folks for the replies.
I'm going in to do same with an SE/30 with jumpy/jittery video (all other avenues exhausted), do you think the BU406D you bought was just a better quality version? I've a pack of ?? unknown BU406 and reckon they might be super cheap. |
Posted by: lubert on 2025-09-07 09:09:48
I suspect the key difference is BU406 vs BU406D. There’s a thread here that describes how BU406 seem to measure differently: https://forum.vcfed.org/index.php?t...-logic-board-is-there-a-chance.1249210/page-4 |
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