thebman80
Well-known member
So I worked all evening on this and 4 black and white monitor chassis later I finally found one that partially works. The screen comes up in a band in the middle. I have not recapped this chassis yet so that could be an issue. But I would like to mention that I had a different chassis that did the SAME thing before it died on me. I'm thinking this might be a yoke/tube issue? I do have a spare tube and can confirm that tomorrow.
I also have a problem where the image is upside down and backwards the tube was originally from a space invaders. So I'm guessing maybe its the yoke wiring? Since space Invaders is reflected in a mirror.
Then there are graphical issues I believe the RAM cards I have in there are good. I did find 3 bad 2114's on the CPU PCB but it made no difference. My next guess is bad Eproms or sockets.
I also have no sound.
Here is a picture of the yoke if anyone with a space zap could confirm the red, yellow, black, and green wires that would be a great help. All I did was match them up with the color dots on the yoke assuming that was correct.
If you look at the image in the mirror above the screen it looks correct.
I also have a problem where the image is upside down and backwards the tube was originally from a space invaders. So I'm guessing maybe its the yoke wiring? Since space Invaders is reflected in a mirror.
Then there are graphical issues I believe the RAM cards I have in there are good. I did find 3 bad 2114's on the CPU PCB but it made no difference. My next guess is bad Eproms or sockets.
I also have no sound.
Here is a picture of the yoke if anyone with a space zap could confirm the red, yellow, black, and green wires that would be a great help. All I did was match them up with the color dots on the yoke assuming that was correct.
If you look at the image in the mirror above the screen it looks correct.
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