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PostPosted: Mon Aug 07, 2017 2:31 pm 
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So while doing a recap on my PAL (Edit: top-loading) front-loading NES, I accidentally knocked off and killed a tiny, unidentified SMD component from within the AV/RF/power box:

Image

There were two of those in my PAL Alps AV/RF/power box, but no extensive testing of the intact one with a multimeter lead to any sensible hint on what this part could be. What I think I can say for sure is that it's neither a cap nor a resistor. And if it was a diode, I wonder why it doesn't have a cathode-marking ring on either side.

Thanks for any suggestions/advice! :)

Ramsis

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Last edited by Ramsis on Mon Aug 07, 2017 2:52 pm, edited 1 time in total.

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PostPosted: Mon Aug 07, 2017 2:37 pm 
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Looks like MicroMELF form factor, given the size... that's a cylinder, right?

There aren't many options for a 2-lead component, really.


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PostPosted: Mon Aug 07, 2017 2:47 pm 
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lidnariq wrote:
that's a cylinder, right?

Pretty sure it was, before I wrecked it. :?

lidnariq wrote:
There aren't many options for a 2-lead component, really.

Well it's obviously not a zero-Ohm bridge either. :lol:

Seriously, could it possibly be an inductor?

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PostPosted: Mon Aug 07, 2017 2:58 pm 
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Don't think I've ever seen an SMD inductor where it's all three of:
1- a cylinder
2- the axis of revolution of said cylinder is mounted horizontally
3- and you can't see the wire

Ferrite beads are rarely in that form factor, but I've never seen a red one.

Looks like tantalum caps come in that color: https://www.arrow.com/en/products/595d6 ... r2t/vishay


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PostPosted: Mon Aug 07, 2017 3:19 pm 
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My guess would be unmarked diode...


Image


Did you try measuring across the intact one on the diode setting on the multimeter?


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PostPosted: Mon Aug 07, 2017 11:48 pm 
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Ramsis wrote:
There were two of those in my PAL Alps AV/RF/power box, but no extensive testing of the intact one with a multimeter lead to any sensible hint on what this part could be. What I think I can say for sure is that it's neither a cap nor a resistor.
Ramsis

What made you lead to this conclusion?


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PostPosted: Tue Aug 08, 2017 2:49 pm 
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hackfresh wrote:
My guess would be unmarked diode...

Image

Did you try measuring across the intact one on the diode setting on the multimeter?

Yes, meter read 0.6 V on either polarity which I found was odd. :? (BTW, the components in your pic are all capacitors not diodes. :wink: )

Bregalad wrote:
Ramsis wrote:
There were two of those in my PAL Alps AV/RF/power box, but no extensive testing of the intact one with a multimeter lead to any sensible hint on what this part could be. What I think I can say for sure is that it's neither a cap nor a resistor.
Ramsis

What made you lead to this conclusion?

@Bregalad Ceramic caps all were the usual brownish-color, and resistors had common color codes on them, unlike the component I need help identifying. Please refrain from insulting my intelligence by asking silly meta-discussion type of questions while not providing any help and/or benefit to this thread. Thanks! :)

Ramsis

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