Oof, that's rough. I'm actually looking to start putting together a collection of rhythm/import games some time this fall, I'll probably be reaching out for some machines if I can secure some space soon.
I can find some info on the 26SU, which seems to be pretty close:
Service Manual
Schematic
The only significant difference I've noted so far is that the 26SG does not have a "Sharpness Switch" as the SU does. Such a switch would be handy right about now :)
I started testing a few of the larger resistors, good so far, but I haven't gone through the lifted/tested all the smaller resistors yet. I didn't get to re-cap the neckboard, so I'll see what needs to be done for that one. I didn't see many caps up there, so it shouldn't be too rough.
I didn't...
The focus is still drifting, however much more slowly with the updated flyback and some resoldering and cleaning. On a fully cold startup, it starts with the focus knob in a very acceptable place, then drifts away over the course of 30 minutes to stabilize focus at a point slightly outside of...
One correction: tonight while working on it, I noticed the focus knob was also adjusting the brightness a little bit.
I ended up testing some resistors, and found a rather large 5.6k one on the chassis that was calculating out to be at 5.1k, so there's something else to follow up on too...
It doesn't change the brightness, no.
I got it from https://www.arcadepartsandrepair.com/. It's listed as being for a MS8-26SU, but the part number exactly matches what came off of my 26SG.
I'll have to see about finding a rejuvenator and see what I get from that. I don't know if anyone local...
Hi all, I'm running a MS8-26SG (from one of my Aeros) and can't seem to get the focus dialed in fully. It's been an issue on this one since I got it. I've recapped it (figured it was a long shot, and I'd get fresh ones on while I had it out) and just installed a new flyback. I adjust the focus...
I'm curious if anyone has an idea on some graphics issues I'm seeing. Games load, most sprites have full shapes, but don't display in anything but flat colors - different colors per sprite (or background).
Album with screenshots
I installed a multiboard, with install/troubleshooting steps...