Galaga PCB repair log and power question

[MonitorGuru]

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[Ken Layton]

Every Galaga I've ever seen has always had a high pitched whine in the sound. Galaga is also a game that needs the power cranked up. I recall an old service bulletin Midway issued stating to crank the supply to 5.2 volts.

The random lockups/resets are due to a timing error between chip manufacturers. Midway issued a service bulletin on that (in a big blue covered "Midway Service Bulletins" report cover) stated something there was a timing compatibilty error between manufacturers of certain chips on the board. It said to be sure chips at certain locations were all the same manufacturer or something like that.

[Ken Layton]

Alot of times the tiny ceramic disc capacitors at the very edge of the circuit boards get damaged/hairline fractured from sliding down the tracks of that card cage frame.