Yjzep Posted January 31, 2018 Share Posted January 31, 2018 (edited) Hi all! I am fixing a colecovision with a corrupted display issue. It will work great forever, until I power it off for a few minutes. On start, it will boot to a corrupted screen and degrade to unstable noise. The power supply i fine, I get good supply at the switch rails so it's not that. Here's the rub. If I push down on L-14 in this state, it will correct. Once it "stabilizes", it will continue to work indefinitely, as long as I dont take any breaks. I played 2600 on the module 1 for 3 hours last night. Any ideas, and also if it is l14 (believe it's a 2.7uh inductor in the video circuit), where can I find one? google only shows me completely different form factors. T.I.A.! Yjzep Edited January 31, 2018 by Yjzep Quote Link to comment Share on other sites More sharing options...
Hatta Posted January 31, 2018 Share Posted January 31, 2018 Have you tried reflowing the solder on l14? 1 Quote Link to comment Share on other sites More sharing options...
Yjzep Posted January 31, 2018 Author Share Posted January 31, 2018 Also, yes I checked and touched up the solder. Either the part is janky or its something else. Once it works, jiggling it does nothing to corrupt it. Quote Link to comment Share on other sites More sharing options...
Yjzep Posted January 31, 2018 Author Share Posted January 31, 2018 It's almost like it needs to "warm up" Quote Link to comment Share on other sites More sharing options...
Yjzep Posted January 31, 2018 Author Share Posted January 31, 2018 It's the brown fella right in the middle on the right side of the board. Quote Link to comment Share on other sites More sharing options...
Yjzep Posted February 1, 2018 Author Share Posted February 1, 2018 Confirmed the warmup theory. Twice today I leery it sit powered on and corrupted and about 8 minutes later it stabilized. Benn playing an hour, switching games and using the 2600 module, no issues. Quote Link to comment Share on other sites More sharing options...
+grips03 Posted February 1, 2018 Share Posted February 1, 2018 newark.com digikey.com mouser.com are the places I buy parts from Quote Link to comment Share on other sites More sharing options...
Yjzep Posted February 1, 2018 Author Share Posted February 1, 2018 (edited) newark.com digikey.com mouser.com are the places I buy parts from thanks, I used mouser and digikey before.. I guess what Im asking is since I'm a hack engineer, I don't have much experience with inductors. I know what they are, but there are different types. None of the ones offered at those sites have the same form factor as the one im replacing. Is the 2.7uh the only measurement that matters? axial or radial? The ones that look like oversized fat resistors ok? Edited February 1, 2018 by Yjzep Quote Link to comment Share on other sites More sharing options...
+grips03 Posted February 1, 2018 Share Posted February 1, 2018 yes, any 2.7uh. Just make sure it fits, which should be pretty easy. Perhaps match up the DC resistance as well. 1 Quote Link to comment Share on other sites More sharing options...
+grips03 Posted February 2, 2018 Share Posted February 2, 2018 if you want I can mail you a spare one. send me pm. Quote Link to comment Share on other sites More sharing options...
Yjzep Posted February 2, 2018 Author Share Posted February 2, 2018 if you want I can mail you a spare one. send me pm. Ill let you know if I strike out, but your help was all I really wanted! This site is awesome, thanks for helping to keep the old machines going! Quote Link to comment Share on other sites More sharing options...
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