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Tech and Marketplace / I need help with my game! - Technical Discussion / asteroids help
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on: July 11, 2015, 08:00:20 pm
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While fixing a "hum" on my asteroids, I was desoldering an LM324 (audio amp IC) on the pcb. but being a newbie I messed it up (maybe shorted something and/or ruined the chip) . when I went to power up the whole game was dead, except the marquee. wouldn't play blind, and the p1,p2 lights just steadily lit. Now upon power up I get neckglow for a second and then quickly almost no glow (is this the spot killer kicking in?) At the edge connector im getting just 8vac at pin 20, while the manual shows I should be getting 36vac. also im only getting 5 and 10vac at pins 7 and 10 of the molex connector feeding the monitor, when I should be getting 30vac. and im not showing any voltage at the X and Y outs of the pcb. I am getting the proper 5 and 10.3vdc on the AR board, and I am getting 5vdc at pin 2 of the pcb edge connector. Ive recapped the whole game including big blue, and replaced the bottlecap transistors on the chassis, and all fuses are good. I really hope someone can point a newbie in the right direction. thanks for any help
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General Category / Introduce Yourself / greetings from colorado
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on: July 11, 2015, 06:19:52 pm
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Hi guys, im new to this hobby. I grew up in the 70's so my first purchase was a 1978 Atari Football, which was "the" game Ive always wanted. Soon after that I got hooked on the idea of restoring (because of watching johns arcade). Ive since gotten 2 fixer uppers (a 1976 Sprint 2 and a 1979 Asteroids) and im in the middle of working on those in my small condo, but I still have a lot to learn. Its been fun, and I hope to learn more here and make some new friends.
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Tech and Marketplace / For Sale / Wanted / Re: Nice atari machines for sale in CT
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on: July 11, 2015, 11:29:04 am
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nice Sprint 2. whyd you sell it? I didn't know the marquee was supposed to blink.(looks cool that way) mine just has a fluorescent up there. power supply on the pcb was always a problem on these, burning out the edge connectors. this was the 2nd game I ever bought, I really hope John restores his and does a vid on it. mine needs a better picture tube. see ya
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