mjhagen
Active member
[SIZE=12pt]Hi all,[/SIZE]
[SIZE=12pt]I received a dead SE/30 that I’m trying to bring back to live. When I first switched it on it started without a chime and on screen was just a vertical line.[/SIZE]
[SIZE=12pt]To fix the audio I did a manual cleaning and re-cap of the logic board. For the vertical line I read that it’s probably C15, however after changing that out I ran a smoke test and I heard a loud-ish squealing sound and I switched off the power supply.[/SIZE]
[SIZE=12pt]To test the logic board I figured I’d try a known good AB/power supply and it booted into the flashing question mark (yay), but after 10 or so seconds the screen started to flicker, show static, then the squealing sound happened on the new AB as well and I quickly switched off the machine. I then started smelling burning (boo).[/SIZE]
[SIZE=12pt]On the original AB there’s a brown spot on yoke connector at the green wire, and also at the CR2 diode.[/SIZE]
[SIZE=12pt]Is there anyone here that can think of a clear cause of this? I thought about it being the fly back, but why would that happen immediately to a working AB? [/SIZE]
[SIZE=12pt]Another possibility would be the yoke connection in the CRT side, which looks a bit messy and I haven’t looked into schematics for that thing yet. Or something else on the yoke itself because that along with the LB were the same in both cases.[/SIZE]
[SIZE=12pt]Mingo.[/SIZE]
[SIZE=12pt]I received a dead SE/30 that I’m trying to bring back to live. When I first switched it on it started without a chime and on screen was just a vertical line.[/SIZE]
[SIZE=12pt]To fix the audio I did a manual cleaning and re-cap of the logic board. For the vertical line I read that it’s probably C15, however after changing that out I ran a smoke test and I heard a loud-ish squealing sound and I switched off the power supply.[/SIZE]
[SIZE=12pt]To test the logic board I figured I’d try a known good AB/power supply and it booted into the flashing question mark (yay), but after 10 or so seconds the screen started to flicker, show static, then the squealing sound happened on the new AB as well and I quickly switched off the machine. I then started smelling burning (boo).[/SIZE]
[SIZE=12pt]On the original AB there’s a brown spot on yoke connector at the green wire, and also at the CR2 diode.[/SIZE]
[SIZE=12pt]Is there anyone here that can think of a clear cause of this? I thought about it being the fly back, but why would that happen immediately to a working AB? [/SIZE]
[SIZE=12pt]Another possibility would be the yoke connection in the CRT side, which looks a bit messy and I haven’t looked into schematics for that thing yet. Or something else on the yoke itself because that along with the LB were the same in both cases.[/SIZE]
[SIZE=12pt]Mingo.[/SIZE]