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Museum of the Game® & International Arcade Museum® Forums
Here is some info on a Space Invaders DX repair. Hoping it may help others.
There is not a lot posted about this pcb and problems with it. The Space Invaders DX normally has a part label. This one was faded away. After cleaning the original pcb number under it on the silk screen is K1100787A J1100332A. I think the label that goes over this is labelled "K11J0813A Space Invaders".
This particular pcb had corrosion in multiple places on the pcb. I did not take a before picture but will try and start doing that in the future.
Here is the pcb in question now working after a good soak and clean with simple green and blowing under all components with compressed air to dry and hopefully remove anything left behind.
Here are the IC sockets and resistors removed and replaced that showed visible corrosion damage. One electrolytic cap had only legs left, so I replaced all 5 that were close to where the main corrosion was.
All EPROM and PAL pins were cleaned on the inside and outside before being placed back on the pcb. This was to make sure they made good contact with the dual wipe sockets.