Hello Grant, I consulted with one of our expert repair members Ian Primus and he said: "It's more than likely either a cracked solder joint or a bad nonpolar capacitor (IIRC the 5 used a 10uf one, but I could be mistaken...), use a film cap to replace it, not a bipolar electrolytic. I have all those parts with me when I go to workshops so I'll have them with me at the workshop this weekend if he wants to bring it by. The 5 used a Samsung monitor IIRC - it's different than the 3, I forget if it's the model with the two caps in parallel in that circuit or not. I'd have to look at it again, and I'm not seeing the schematic for the monitor on Bitsavers in the maintenance manual... I don't know if I've ever had the schematic to that monitor, however. Not like you need it to fix one, it's a simple monitor. But there's not a whole lot to break that can cause a vertical line like that - if you lose hsync you'll have no HV, same with most other faults in the horizontal circuit. The only things that can cause that are strictly in the output section, like wiring to the yoke or width/linearity coils, or that cap. Even then, the capacitor usually takes down the HV when it dies too. " Jeff Brace On Mon, Oct 3, 2022 at 10:11 PM Grant Tesler <grant.tesler@gmail.com> wrote:
Hi everyone!
I've been lurking on this email post for about a year now and never wrote anything. I have a Lear Siegler ADM5 that I want to get back to working normally. The display is just putting out this vertical line in the center of the screen. I don't think I can make it to this workshop, but I'll try my best for the one in November. This would give me time to purchase parts. Would anyone know of what parts I should get beforehand that could repair this type of issue? All the parts inside are original to the best of my knowledge and I'm sure there's things that could use replacements. Any ideas are appreciated.
Thanks!
Grant
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