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I had to disassemble a cheap kitchen scale for cleaning after it stopped working because of fluids. To my surprise I found the LCD does not seem to have a physical connection, but some sort of magnetic link to the board.

The LCD came with a rubber strip and it has some pins in the crystal.

Any tips? Thanks!

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greybeard
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Gabriel
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    There's no magnets involved, just pressure. That connector is called an elastomeric connector, or colloquially a zebra strip (yours isn't, but most of them seem to be striped, like a zebra). – Hearth Oct 07 '22 at 21:39
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    Does this answer your question? [What are rubbery, conductive strips called on the sides of an LCD screen?](https://electronics.stackexchange.com/questions/157647/what-are-rubbery-conductive-strips-called-on-the-sides-of-an-lcd-screen) – brhans Oct 08 '22 at 03:48

1 Answers1

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The rubber strip has many parallel conducting wires across it, and will connect a set of contacts on the PCB to a set of contacts on the LCD display.

Place it properly between the PCB and the display and it should work (it can be a bit fiddly; test before further reassembly; press LCD display down carefully if necessary). The LCD display and PCB will eventually be kept in place and pressed together by the enclosure.

Also see What are rubbery, conductive strips called on the sides of an LCD screen? and the Wikipedia article.

ocrdu
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    Ended up using the casing of the display to properly align it. Otherwise it was impossible. Now have a perfectly working (and clean) scale again! – Gabriel Oct 09 '22 at 14:32