Arcade Collecting > Restorations & repair
Star Wars - fully working!
Spyridon:
--- Quote from: RetroACTIVE on June 30, 2009, 09:42:34 am ---I'm not sure if I was able to tell from the posts if you checked the TLO82's (x/y drive amps) on the AVG board. There are 2 amps per package and each X and Y circuit uses one 8 pin DIP. They are clearly labeled on the schematic.
Ideally you would use a scope and look at input vs. output to see if the op-amp(s) are doing their job....(thats what I do) but I suppose you could use a DVOM however it may be difficult to detect. The good news is if it is a bad op-amp those TLO-82's are dirt cheap and easily obtainable.
--- End quote ---
I have not looked at them. The only things I played around with were the two DAC chips.
Level42:
He's just ignoring us I guess:
--- Quote from: Level42 on May 16, 2009, 04:50:32 am ---I told you to check the amps first....... ;)
--- End quote ---
:laugh: :laugh: :laugh:
Just noticed: the pictures of those yokes all show some bolts going through the handles. The one with the Arcadeshop decal seems to have two. These are not standard, guess ops installed them because the handles were moving ? It looks fugly.....I'd check with David for a couple of new handles.....
Spyridon:
--- Quote from: Level42 on June 30, 2009, 12:33:06 pm ---He's just ignoring us I guess:
--- Quote from: Level42 on May 16, 2009, 04:50:32 am ---I told you to check the amps first....... ;)
--- End quote ---
--- End quote ---
Not ignoring you...I thought that's what I was doing when I swaped the DAC chips. ???
Level42:
I'm sorry, since my education was in electronics I keep assuming some "basic" things to be known by all collectors. Just my fault....
The DAC's are Digital to Analogue Converts. They convert a digital signal into an analog signal and nothing else.
The Op-Amps Amplify the signals so they are strong enough to drive the monitor. Let me check the schematics....
Level42:
I've included the page of the schematics. To the left you see the DAC's. The amps are all the triangle shaped figures. Note that some of these are in the same IC ! (Those IC's have f.i. 4 amps in one package)
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