Joshmans
Member
Having problems with Galaga, Millipede, and Star Gate
Recently I was put in charge of repairing my local arcade's Galaga, Millipede, and Star Gate machines. My previous experience has been simple board changes, coin mech repairs, and switching out sticky cherry switches and buttons, as well as some unrelated soldering and electrical knowledge.
Pictures of the problems are here: http://imgur.com/a/L8Hnr
All three machines are in great shape, as far as cabinets and harness / controls. The boards / power supplies / CRT circuits are what I think are the issue.
Galaga has a brand new board in it, although I'm unsure if its hooked in correctly, I'm bringing in the manuals next week. The audio is rather unsettling though, a faint electronic gargly buzz and the sound of your ship exploding over and over again.
Millipede shows vertical columns of junk data and the screen has a verticle scan line that loops on the screen as if you were looking at it through a camera. I think the power supply might be bad.
Star Gate just shows a grid of junk data thats nearly impossible to decipher. The machine came with all the schematic scrolls.
Does anyone know the cause of these problems and how I can diagnose and fix them?
Any help would be greatly appreciated.
Recently I was put in charge of repairing my local arcade's Galaga, Millipede, and Star Gate machines. My previous experience has been simple board changes, coin mech repairs, and switching out sticky cherry switches and buttons, as well as some unrelated soldering and electrical knowledge.
Pictures of the problems are here: http://imgur.com/a/L8Hnr
All three machines are in great shape, as far as cabinets and harness / controls. The boards / power supplies / CRT circuits are what I think are the issue.
Galaga has a brand new board in it, although I'm unsure if its hooked in correctly, I'm bringing in the manuals next week. The audio is rather unsettling though, a faint electronic gargly buzz and the sound of your ship exploding over and over again.
Millipede shows vertical columns of junk data and the screen has a verticle scan line that loops on the screen as if you were looking at it through a camera. I think the power supply might be bad.
Star Gate just shows a grid of junk data thats nearly impossible to decipher. The machine came with all the schematic scrolls.
Does anyone know the cause of these problems and how I can diagnose and fix them?
Any help would be greatly appreciated.
