Arcade Collecting > Restorations & repair
Star Wars - fully working!
Level42:
No they didn't.
They switched from WG _TO_ Amplifone, not the other way around. The WG performed badly and needed a number of revisions.
They also wanted a higher resolution and higher slew-rate for SW.
SW was designed fot the Amplifone (or maybe the other way around)
The Amplifone monitor was designed by Atari (who had bought Amplifone instead of contracting them for the production of the monitors).
I've also read that WG couldn't produce enough vector monitors at the time.
There's a lot of info on Jed Margolin's site (who was the hardware designer of SW):
www.jedmargolin.com
Even if you don't understand the technical stuff, there's plenty of interesting trivia and facts in those documents.
Spyridon:
Okay, back to this project. I got my Fluke HV probe in and discharged the monitor. I pulled then pulled the monitor out to make working on it much easier.
I first checked all of the transistors using my meter and they all 4 of the 6 were showing as bad. Wait a minute...forgot to unplug them from the deflection board. Try again. This time all checked out as good. Next I removed the deflection board to look for some bad solder joints. Bingo...I think I found a problem.
It may not be clear in the picture (had trouble getting good close up shots), but there is a definite gap between the soder and the board on the header pins circled. I'm hopeing this could be the issue.
Kevin Mullins:
The key thing to keep in mind when you find a trace burnt like that..... "something" caused it.
Where abouts on the board is that spot located?
Spyridon:
--- Quote from: Kevin Mullins on April 18, 2009, 12:50:00 pm ---The key thing to keep in mind when you find a trace burnt like that..... "something" caused it.
--- End quote ---
It's not burnt. It was resoldered at some point and what looks like a burnt part in the photo is actually flux. It appeard to be a cold solder joint.
Kevin Mullins:
Yeah, I can see the flux.... just the way it looks like the trace curled up a bit makes it look like it "burnt". From an over current situation of sorts.
If it were just a cracked joint it wouldn't have done that.
And if someone soldered on it with a cracked joint and then that happened, well, you would think they would have noticed it.
Maybe it's just hard to tell in the pic. :dunno
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version