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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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17th May 2023, 4:11 pm | #1 |
Octode
Join Date: Dec 2008
Location: Wincanton, Somerset, UK.
Posts: 1,780
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Mystery SM component
I have an HP lap-top PSU which was switched on when wet.
A component at the heart of the problem is labeled 'BC2'. All the other comp loc references are normal R1 /C2 etc. Does anyone know what this might be? It's close to black in colour. |
17th May 2023, 5:45 pm | #2 |
Octode
Join Date: May 2003
Location: Belper Derbyshire
Posts: 1,935
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Re: Mystery SM component
Looks to me like a surface mount inductor as the Matt dark grey colour quite closely resembles a ferrite core. What is its resistance? If quite low then definitely an inductor.
Christopher Capener
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Interests in the collection and restoration of Tefifon players and 405 line television |
17th May 2023, 6:22 pm | #3 |
Nonode
Join Date: Nov 2015
Location: Welwyn Garden City, Hertfordshire, UK.
Posts: 2,015
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Re: Mystery SM component
See Murata BLM inductors. It certainly resembles one.
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17th May 2023, 6:32 pm | #4 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,876
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Re: Mystery SM component
probably a surface mount ferrite bead in a power rail filter.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
18th May 2023, 4:48 pm | #5 |
Octode
Join Date: Dec 2008
Location: Wincanton, Somerset, UK.
Posts: 1,780
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Re: Mystery SM component
Thanks for the feedback everyone: I think you're spot on with the SM chip ferrite inductor. It's OC, and a series resistor is v unhappy. I suspect the switching FET has gone s/c.
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