ImJustBadAtThings Posted June 25, 2018 Share Posted June 25, 2018 Is it even possible to get back up from this stupid mistake? I grabbed whatever cord I could find so I could update my tetra since it just sits on my shelf collecting dust. I mistakenly used a pretty powerful cord and watched as the tetra starting smoking in my hands. I unplugged it, opened it, and noticed that the chip near the power input was blown. No other chips seem affected. Is there any way to get ahold of a spare chip, or is it worthless by the fact the board is burned too. I included the picture of the chip. Quote Link to comment Share on other sites More sharing options...
Dave-ee Jones Posted June 25, 2018 Share Posted June 25, 2018 What do you mean by powerful cord................. Quote Link to comment Share on other sites More sharing options...
ImJustBadAtThings Posted June 25, 2018 Author Share Posted June 25, 2018 3 minutes ago, Dave-ee Jones said: What do you mean by powerful cord................. Mostly meaning it had a supply unit the size of a small brick. This one Quote Link to comment Share on other sites More sharing options...
Dave-ee Jones Posted June 26, 2018 Share Posted June 26, 2018 Yeaaaaa, almost 30V and 3A.. It should only need around ~12V and 2A.. 1 Quote Link to comment Share on other sites More sharing options...
Cap_Sig Posted June 26, 2018 Share Posted June 26, 2018 You can get a replacement chip but will have to be able to solder it on. Also you could have more fried components that are visibly damaged..... Quote Link to comment Share on other sites More sharing options...
ImJustBadAtThings Posted June 26, 2018 Author Share Posted June 26, 2018 2 hours ago, Dave-ee Jones said: Yeaaaaa, almost 30V and 3A.. It should only need around ~12V and 2A.. Yeahhh haha a little overkill... 18 minutes ago, trapman16 said: You can get a replacement chip but will have to be able to solder it on. Also you could have more fried components that are visibly damaged..... Are you able to point me in the direction of a new chip? As I'm not so well at finding reliable and trusted sources. I've checked about everything on the top So I'll take my chance. If you can somehow identify any more fried components from a picture, I would love your help. Thanks Quote Link to comment Share on other sites More sharing options...
Cap_Sig Posted June 26, 2018 Share Posted June 26, 2018 You just need a FR9888 step down regulator. You should be able to find a few around the web. eBay has them but you will typically have to buy them in packs: https://www.ebay.com/itm/10pcs-FR9888-FR9888SPGTR-SOP-8-IC-good-quality-/291656081865 Its hard to tell from the picture posted. Just depends on the rating of other components used on the board but there is a chance that capacitors, resistors used in the reg circuit could be fried. Not real familiar with the chip but if it caused a voltage spike when it fried then the damage may be unrepairable... Quote Link to comment Share on other sites More sharing options...
barry99705 Posted July 5, 2018 Share Posted July 5, 2018 (edited) https://www.amazon.com/20pcs-FR9888-SWITCH-POWER-IC/dp/B07DCBQ1K5/ref=sr_1_1?ie=UTF8&qid=1530792618&sr=8-1&keywords=fr9888 Like trapman16 said, it may have taken more with it, but it's worth a shot. Edited July 5, 2018 by barry99705 Quote Link to comment Share on other sites More sharing options...
ASF34 Posted July 12, 2018 Share Posted July 12, 2018 This was kinda funny lol, Goodluck @ImJustBadAtThings. ??? 1 Quote Link to comment Share on other sites More sharing options...
Zylla Posted July 24, 2018 Share Posted July 24, 2018 Good luck testing with replacing that chip. You've might been lucky, that the chip acted like a fuse, so you can simply replace it. But as others have stated: Other components might still have been affected. 30v is a might much, but i really hope for your sake that you were lucky, and that it will work with a replacement chip. :) I would have tried the same :P Quote Link to comment Share on other sites More sharing options...
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