Arcade Collecting > Restorations & repair
Star Wars - fully working!
Spyridon:
Update on this. Had all four of the chips replaced with new ones. When I powered up, the spot killer was blinking very rapidly. The screen was trying to draw a picture and would flash what looked to be one of the x-wing parts that fires the shots but it was in the wrong spot. Did that for a few minutes and now the spot killer is on full with nothing on the screen.
I measured the x and y outs and they are both outputting the correct values. There was definitely a problem with the chip, but now that it's fixed I still have problems? Guess it's time to refocus on the monitor.
Suggestions on what to try next?
Level42:
Test mode.
Spyridon:
The game works!!!! :applaud: :applaud: :applaud:
I borrowed an oscilliscope from someone at work today. I wanted to determine if the board was the problem or the monitor. I remembered Level42 doing this in his Star Wars thread.
First, I hooked up my Asteroids Deluxe board to make sure I had the scope configured correctly. I quickly had asteroids flying all over the scope. (pretty cool)
I then hooked it up to Star Wars and tried it out. All I got was a big spot in the center. Okay, I can see why the spot killer would be on! I now know that I still have a board problem and not a monitor problem. I still had the new AVG chip that I had tried out earlier with no success. I hadn't tried it since I replaced the Amps so I pulled the board out a swapped the new chip in. Plugged the board back in and BINGO...We've got Star Wars!!!!
End result is I had two problems with the board. Bad TLO82 Amp and a bad AVG chip.
Spyridon:
Game works but I'm still having issues. Game starts out fine with a nice crisp picture, but then starts to get blurry as you play. By the time you reach the second level, everything is really blurry and barely playable. Eventually, the monitor screen just goes black.
Occassionaly, hitting the side of the cab brings the montor back on (but not everytime). (yeah, I got frustrated and tried that approach)
This problem was present since I got the game. I originally thought it was the loose neckboard, but that doesn't seem to be it. B+ measued 179V when the monitor was working, but dropped to a nominal number when nothing on the screen.
Any ideas on what would cause this?
Level42:
Hah, so at least I was right about the amp :) Tough one that the AVG was also bad.... and now the monitor problem.....you're not actually really lucky with this SW my friend....
Now you have a working board-set we can move back to the WG6100. I forgot what monitor was in there,but I could say you should rewind to the first pages of this thread for lot's of WG6100 tips.
First: >>> check the solderings of the connectors on the deflection board !!! <<<
The fact that you can "bring it back to life" by hitting the poor cab is indicating bad contacts/solderings. And it's the very thing I've experienced with the one WG6100 I've worked on so far that especially the connectors on the deflection board have often very bad solderings or the tracks are cracked right near the soldering pads.
Rewind to here for pics etc.:
http://forum.arcadecontrols.com/index.php?topic=90963.msg957058#msg957058
By the way, no need to test the transistors anymore. The fact that it can run fine tells you that the transistors themselves are fine. (Transistors don't go good-bad-good, they are either good or bad and if bad stay bad.
So, the hunt for bad solderings and poor connections is open. Did you install a LV6100 or LV2000 already by the way ? I'd advice you to do that. Plus of course the regular cap-kit.
Keep on it, you'll get it fixed, you've already tackled the really hard part (the PCB set).
Oh, and of course you should download this:
http://www.ultrathegame.com/tempest/6100_faq.pdf
and read it. Then read it again. Not _everything_ in there is neccesary or "the truth". There are so many mod suggestions that it puzzles me and so I ignored them, but I did to the Zener diode mod to protect the inputs.
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