Rock on! Asteroids Cocktail Restoration

[toolguy]

I know you stated: "The board I have is a known working one, I've already verified this." but I feel you do not have a functioning PCB yet.

Can you still start a game?
Is the PCB still in free play and you can start a game?

Looks like the spot killer is on because you don't have deflection signals coming from the PCB.

I agree!

XY montors need a signal from the board to display it's images. Mine did this same thing and it was the board, sent it off to be fixed.

One things for sure, don't leave the spot killer image on for too long or else it will burn a spot into the monitor. This spot is a highly concentrated image and burns faster then a normal image into the screen, much faster!

 

[That80sGuy]

Have you checked the chips that handle the X-Y signals? I had similar issues and replaced mine..as well as socketed them.

 

[opt2not]

Have you checked the chips that handle the X-Y signals? I had similar issues and replaced mine..as well as socketed them.

Ah crap, I was hoping someone wouldn't say that. Those chips are like $20 a pop!
I can check them with my logic probe, but I don't have access to an oscilloscope. I'll look up how to use a logic probe for this, I'm sure the info is around here on how to check IC's with a probe.

This morning I was playing with the X adjustment pot on the PCB, when I turn it, I can see the horizontal line stretch back and forth only from center to right (nothing happening on the left), but when I turn the Y pot, I get no changes what-so-ever.

 

[opt2not]

This machine is complete as of early last year, but I figured I should close this one off after so long.

I ended up giving up on it, and got the monitor repaired by a local arcade shop.

- Replaced old capacitors on HV cage
- Repaired trace shorting to chassis. The board was a bit warped, and when the power was put on, it was touching the chassis, shorting out and blowing a fuse)
- Repaired open trace on main monitor board, there were a couple of almost imperceptible breaks in a couple of traces.

The last one was something I couldn't see, but the prior two weren't too hard to fix and would have been something I could have caught if I wasn't already fed up with it all.

Here's how it looks now:

Happy to have saved another vector machine!

 

[f1tech]

That turned out awesome! Great work!