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I have a remote controller whose antenna is de-soldered and it seems there was a capacitor or a resistor (see red circle).

Can anyone help me to understand what component could be the missing one? I thought a capacitor similar to others close but I'm not sure.

Thanks to anyone can help!

enter image description here

Electric_90
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Leandro
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  • I think you are SOL on this. Without a schematic diagram, all anyone could do is guess. Even if you knew if a resistor, a capacitor, or even an inductor belonged there, that wouldn't tell you the value. To my eyes, the part was not properly desoldered but seems to have been broken and then fallen out. – JRE Jul 15 '20 at 12:59
  • It looks like the end caps are still stuck in the solder. – JRE Jul 15 '20 at 13:00
  • You'd need to find the model number of the remote control, then search the internet to find a schematic diagram for it. Or, find an identical one then remove and measure the missing part. – JRE Jul 15 '20 at 13:08
  • why are you asking? – jsotola Jul 15 '20 at 14:41

1 Answers1

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Can anyone help me to understand what component could be the missing one?

I think there's a good basis for believing the capacitor was deliberately de-soldered in order to improve the tuning of the antenna or oscillator that it uses. Many designs leave space to add components through a "select-on-test" process and, quite often some components are fitted and then removed in the same process.

I thought a capacitor similar to others close but I'm not sure.

Given the type of circuit, more than likely it is a capacitor but there's no-way that it might be similar to others that surround it.

Andy aka
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