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I found this component inside a Canon Vixia HG20 LCD PCB:

enter image description here enter image description here

This seems to be an opaque lens of some kind, so my first thought is that this could be an IR sender/receiver. Since there are 4 terminals, we could be looking at 2 diodes, despite the unusual 3 x 1 terminal disposition. Unfornunatelly, at this moment I can't test/measure it.

Notice that this opaque dome is pointing at the covered window on the second photo, so maybe it was used for testing during development.

Also, the component label caught my attention: RU200. Obviously, this has nothing to do with RU certification.

Any thoughts on what this component might be?

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  • \$\begingroup\$ It looks more like the whole board is the RU200. The component designators are much smaller, as is "SW2". \$\endgroup\$
    – Transistor
    Commented Apr 20 at 15:26

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The user manual says that location has the infrared remote receiver. And the looks match to an infrared receiver module.

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  • \$\begingroup\$ That's right! I knew it had this feature, but I did not remember it was there! \$\endgroup\$
    – tfm
    Commented Apr 19 at 1:48
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    \$\begingroup\$ It might mean "receiver unit"... \$\endgroup\$
    – the busybee
    Commented Apr 19 at 5:39

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