Asteroids Restoration

Two rings to rule them... ah fuck it.

Alright, did the centering ring adjustment on the yoke and did manage to move it along with sizing the grid via the PCB. I have no idea if you can safely adjust the yoke rings while it's on. I did not. I simply started out with the grid, took a photo, turned it off, moved one of the rings, and turned it back on (not too quickly with the off and on). Didn't take long to get it adjusted.

I Affiniiy'd a pretty photo illustrating this for others.

The other photo shows the test grid and what's happening.

Here is a link to a video of the scaling issue I'm seeing: https://www.youtube.com/watch?v=6HJZFhDz7LY

Thanks for the continued help! Almost finished with this I think! :)
 

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That just looks like your linearity is out of adjustment. The picture is being drawn differently at the edges of the screen vs the center, which causes the crosshatch lines not to be straight.

Find the pots on the deflection PCB, and adjust them (in addition to the X and Y size pots on the game board) until the diagonal crosshatch lines are straight.
 
Nice work. For the record however, the tabs are the same (not one for horizontal and one for vertical). They each pull the beam a bit off center, so if they are directly opposite each other the effect is nullified, or if they are pointed in the same direction they will pull it the most in that direction. Or, they can be offset to pull it partly one way and partly another. Think back to high school geometry and vector addition.
 
Alright, did the centering ring adjustment on the yoke and did manage to move it along with sizing the grid via the PCB. I have no idea if you can safely adjust the yoke rings while it's on. I did not. I simply started out with the grid, took a photo, turned it off, moved one of the rings, and turned it back on (not too quickly with the off and on). Didn't take long to get it adjusted.

I Affiniiy'd a pretty photo illustrating this for others.

The other photo shows the test grid and what's happening.

Here is a link to a video of the scaling issue I'm seeing: https://www.youtube.com/watch?v=6HJZFhDz7LY

Thanks for the continued help! Almost finished with this I think! :)

Got a pair of latex gloves laying around? try those out and sneak your hand in and adjust the rings.
 
That just looks like your linearity is out of adjustment. The picture is being drawn differently at the edges of the screen vs the center, which causes the crosshatch lines not to be straight.

Find the pots on the deflection PCB, and adjust them (in addition to the X and Y size pots on the game board) until the diagonal crosshatch lines are straight.

Exactly what andrew just said.. find the two pots closest to the tube (With the monitor out of the cab) and work them like its your job.
 
Progress!

So I did the adjustments on the deflection board. One hand adjust pots on the board, the other on either the x or y scaling pot on the pcb. Flashlight in mouth. That was fun.

Here's what I ended up with. I did get it pretty nice and clean I think, what do you guys think of the size of it? If I tried to get it larger I was having problems with the X axis getting even. The Y axis would scale fine. Is this normal? Just wondering.

And so, in adjusting the pots on the deflection board, I found the source of this breathing issue I was noticing on the display. Looks like I will have to re-solder one particular pot, it's very touchy and causes the display to jump in size. Who knows, may need to replace it altogether, we'll see.

Thanks for the help once again!
 

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Looks pretty good!

It's tough to get it perfect, in my experience, so you're par for the course. But it's much better than it was.

As for the pots, I'd say replace them. I'm actually needing to replace mine as well, as they're not quite right. I think they get either dirt/corrosion spots on them, or cracks/breaks, as my brightness pot has a dead spot where the pic disappears.

You can try DeOxit, which will help, but since they're open-air type pots, they accumulate a lot of crap over 30+ years. Best to replace them, though I don't have a specific part number.
 
So I did the adjustments on the deflection board. One hand adjust pots on the board, the other on either the x or y scaling pot on the pcb. Flashlight in mouth. That was fun.

Here's what I ended up with. I did get it pretty nice and clean I think, what do you guys think of the size of it? If I tried to get it larger I was having problems with the X axis getting even. The Y axis would scale fine. Is this normal? Just wondering.

And so, in adjusting the pots on the deflection board, I found the source of this breathing issue I was noticing on the display. Looks like I will have to re-solder one particular pot, it's very touchy and causes the display to jump in size. Who knows, may need to replace it altogether, we'll see.

Thanks for the help once again!


Lol,, did you get drool on the flashlight and in the monitor ?
Dont just reflow those pots,, check with that dude security90210 and see if he stocks XY pots and change them.
Reflowing them or trying to clean them is like ice skating uphill
 
Lol,, did you get drool on the flashlight and in the monitor ?
Dont just reflow those pots,, check with that dude security90210 and see if he stocks XY pots and change them.
Reflowing them or trying to clean them is like ice skating uphill

Hahaha, probably drooled in my beer afterwards. It was a small flash light too.

Ah good idea, I need to send him a cap order for my Turbo this weekend anyway.
 
1979, meet the Internet of 2016

Installed JCH's Online Asteroids High Score Save kit! I was really excited for this and HighScoreSaves was quick with getting it out.

Also christened the name of my slowly growing arcade with the title of my score page, Jen's Arcade, after my wife. The best part of this is, she has a short list of games we must have as well. See how this works? :D

To run the network cable safely to the board, I bought a Switchcraft EHRJ45PE RJ45 Cat5 Feedthru Panel Mount Connector (Shielded). Shielded because of the ginourmous transformer sitting next to it, not that this high-score device will require mass amount of bandwidth.

EHRJ45P5E.JPG


Sadly it seems all the network cables I have seem to be missing at least one clip, so I'll pick up some new ones to properly run this cable so it isn't dangling in the cabinet and putting stress on the board. But at least this will prevent the add-on board from being ripped out from an accidental tug on the cable from the outside.

Gotta love the loading screen, all that's missing is one of JCH's awesome chiptunes. :D


https://www.youtube.com/watch?v=S8Qk3xh2riU

Since there's no network cabling run through the house yet, I needed a wireless bridge to get this online. I repurposed an old Netgear N300 WR2000 V3 and installed DD-WRT which made it incredibly easy to set the bridge mode up on my existing wireless in the house.
 

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Finally got the new replacement pots ordered from arcadepartsandrepair.com and installed all 4 of them on the deflection board this weekend. No more jittering or breathing of the image.

Spent an hour tweaking the image with the test pattern, still needs fine tuning, but my legs couldn't take squatting down any more.
 

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yeah the blooming looks like the picture is expanding right off the edges of the screen
and gets dimmer as it does that..

The breathing is usually a pot.
 
yeah the blooming looks like the picture is expanding right off the edges of the screen
and gets dimmer as it does that..

The breathing is usually a pot.

Breathing of the image? What did that look like? I had a blooming issue - is that what it looked like? Expanding and shrinking of the entire screen?

What vertex said. Just tapping the bad pot revealed the problem right away, it made the image jump significantly in size, but left alone you got that "breathing" effect.

Now that they're all replaced it's solid.
 
Installed JCH's Online Asteroids High Score Save kit! I was really excited for this and HighScoreSaves was quick with getting it out.

Also christened the name of my slowly growing arcade with the title of my score page, Jen's Arcade, after my wife. The best part of this is, she has a short list of games we must have as well. See how this works? :D

To run the network cable safely to the board, I bought a Switchcraft EHRJ45PE RJ45 Cat5 Feedthru Panel Mount Connector (Shielded). Shielded because of the ginourmous transformer sitting next to it, not that this high-score device will require mass amount of bandwidth.

EHRJ45P5E.JPG


Sadly it seems all the network cables I have seem to be missing at least one clip, so I'll pick up some new ones to properly run this cable so it isn't dangling in the cabinet and putting stress on the board. But at least this will prevent the add-on board from being ripped out from an accidental tug on the cable from the outside.

Gotta love the loading screen, all that's missing is one of JCH's awesome chiptunes. :D


https://www.youtube.com/watch?v=S8Qk3xh2riU

Since there's no network cabling run through the house yet, I needed a wireless bridge to get this online. I repurposed an old Netgear N300 WR2000 V3 and installed DD-WRT which made it incredibly easy to set the bridge mode up on my existing wireless in the house.

"See how this works?"
I'm tryin lol
 
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