EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: tudorv on December 24, 2017, 07:40:33 pm
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Hello,
i have to change a part on an intercom pcb but i cannot correctly identify the part just after the indicative, maybe any of you can drop a hint.
here are some pictures
https://ibb.co/bDvrem
https://ibb.co/mgpv5R
https://ibb.co/ecHts6
https://ibb.co/exQDs6
https://ibb.co/cypHKm
https://ibb.co/ceOoQR
https://ibb.co/cSDBem
https://ibb.co/hGZHKm
Thank you!
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They look like 330K trim pots. The adjustment slot is covered with wax to fix the setting, and possibly prevent water ingress. Try to dig though the circle and see if you can find the adjustment slot.
They also appear to be covered with conformal coating with the rest of the board.
And if they are adjustable, you will need to know the adjustment as well.
But the placement is strange for trim pots, so I may be wrong here.
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Feriite beads (filter coils)
https://www.avnet.com/shop/us/p/brc2016t330k-3074457345625656089 (https://www.avnet.com/shop/us/p/brc2016t330k-3074457345625656089)
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Feriite beads (filter coils)
Yes, this makes more sense given the placement.
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Yes, this must be
But can you tell what value is this one?
https://ibb.co/exQDs6
I desolder the other one which is working and measuring it it shows 3.2ohms
Thank you
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could be this one?
https://ro.mouser.com/ProductDetail/Taiyo-Yuden/BRC2016T101K/?qs=sGAEpiMZZMsg%252by3WlYCkU5iuzh4MJmq0iCImZVKIwr8%3D
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I would be very amazed if it will make a difference; so I would say, go for it, it will be anyways way better than 330K trim pot >:D
Ninja edit: Go get yourself one of these cheap LCR meters if you're overly concerned about the exact value, but to me it looks that both mine and yours will work perfectly.
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yes, i will order one of them and i will see
thank you!