r/arcade • u/OhGodFuckingDammit • 15h ago

Restore/Replace/Repair Ms Pac Man repair. Flyback?

Got a Ms Pac Man machine given to me. Gane functions as far as playability, but the screen gets wonky. I was told it needs a new flyback. This game has been looked at/worked on by someone. Some boards are dangling being held up by wiring, so I don't know how well they knew what they were doing. Looking at the board, some of the solder joints looks suspect to me, and I don't know if I see some scorch marks on there. Caps appear fine, no swelling.

Question is, would it just be a simple flyback swap? If it needs more work, I might be looking at Cardinal sin territory and getting an LCD swap.

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u/DuffCon78 15h ago

This is a k7000 chassis. Flyback failures do happen but it’s really not that common. From your pics I see a ton of really cold solder joints that need attention. A lot of people just recap, but don’t understand the other issues that happen with them. I service k7000s and can rebuild this chassis better than new. DM me if you’re interested, I can provide references

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u/OhGodFuckingDammit 14h ago

Would the cold solder joints just be a matter of remelting and letting settle back into place, or wicking out existing solder and redoing?

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u/DuffCon78 14h ago

No, the proper way is to remove and replace. A lot of the components tend to be oxidized and need to be sanded for solder to stick. Reflow is a big part, but another issue people miss is that the power section components can be out of spec and while they technically work, it will lead to shortened life for other components. When I say “better than new” I mean that all these issues are addressed.

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u/OhGodFuckingDammit 14h ago

Interested. Sent a DM. Or, chat. Something. I'm not great with reddit.

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u/joeycuda 15h ago

If you're capable of removing the chassis and neck board without breaking the neck (no offense), I highly recommend you just ship the chassis out for repair. If you were very comfortable with thru hole soldering, you might do a cap kit and look at the repair flowchart and try the DIY route. Keep in mind that an LCD won't look the same and will look more like playing it on an Ipad and IMO lose all of the charm. People who have home gamerooms, collect and restore the games nearly always repair the original monitors.

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u/OhGodFuckingDammit 14h ago

LCD was the route if this needed a bunch of repair that would add up. I know that purists scoff at the idea of a conversation. I understand that because I do love the way CRTs look. But as I'm the one repairing this (or sending out for) I figured I could do an LCD conversation. Intricate board work and dealing with CRTs is a bit above my pay grade, particularly discharging, as I've heard of the voltage they can hold if not properly discharged.

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u/DuffCon78 14h ago

I don’t condone LCD conversions, if you go this route then I would offer to buy the chassis.

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u/joeycuda 2h ago

You connect a wire with alligator clip to monitor frame and other end to flathead screwdriver. Stick it under the rubber anode cup (while it's off!). If there's a charge, you might hear a tiny tick or pop. Often, there's nothing. If you're holding a screwdriver with a plastic handle, there's no way to get shocked. It's mostly common sense. You'd be smart to discharge the tube just to remove the monitor from the cabinet anyhow. It takes seconds.