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- Mar 19, 2011
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Just picked up a dedicated Dig Dug machine that has issues. It has no video and screeching audio tearing through the speakers but no game sounds. So I ran a few checks...
Checked Atari Power Block Outputs and it appears within tolerance at 10.3 VDC where as needed. The Linear Power Supply however is outputting 4.7 VDC max (adjusted pot) or at least that is what I can get from the GND and +5v test points on the Dig Dug board.
I haven't tested the monitor any further than as to turn it on and confirm neckglow. All but one fuse was good and it only appeared to be the marquee lamp fuse.
I cleaned up a few contact prongs on the custom chips on the main board, but I think 2 of them had one broken prong.....others are weakening as well, but it had the same response before the 2 prongs broke.
Anyone know where to start with this? Is it easier to eliminate the old Linear Power Supply or is it a little more reliable than the Taitos? Can those chips be replaced or repaired?
I'm gonna post some pics of this cabinet later in general, but my camera is dead at the moment.
Checked Atari Power Block Outputs and it appears within tolerance at 10.3 VDC where as needed. The Linear Power Supply however is outputting 4.7 VDC max (adjusted pot) or at least that is what I can get from the GND and +5v test points on the Dig Dug board.
I haven't tested the monitor any further than as to turn it on and confirm neckglow. All but one fuse was good and it only appeared to be the marquee lamp fuse.
I cleaned up a few contact prongs on the custom chips on the main board, but I think 2 of them had one broken prong.....others are weakening as well, but it had the same response before the 2 prongs broke.
Anyone know where to start with this? Is it easier to eliminate the old Linear Power Supply or is it a little more reliable than the Taitos? Can those chips be replaced or repaired?
I'm gonna post some pics of this cabinet later in general, but my camera is dead at the moment.
