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Through hole Diode Identification

connorm

May 13, 2020
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May 13, 2020
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Hey there,

Newer to electronics but competent enough to take direction, so bear with me please.

How can I identify this diode? Schematics are non existent and there are no markings on the diode itself.

I've removed a corroded one elsewhere in the circuit and need to replace it.

Are all small diodes the same?

Thank you for your time.

Screen Shot 2020-05-11 at 1.53.56 PM.png
 
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Hunter64

Nov 20, 2018
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Nov 20, 2018
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Not all diodes are the same. Do you have a picture of the surroundings of the corroded one?

It might be a 1N4148 but there's no certenty.
 
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PETERDECO

Dec 19, 2019
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Dec 19, 2019
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It looks a little fatter than a 1N4148. I use zener diodes that look like this. What is this circuit? Make, model, function?
 

Martaine2005

May 12, 2015
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May 12, 2015
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Perhaps this 1s2473? Your camera angle may be making it look fatter?

79321c174ff4a39d993681acc2a2


Martin
 

connorm

May 13, 2020
5
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May 13, 2020
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Thanks for all the replies guys.

The circuit is transport controls for a Tascam 688 cassette recorder.

It for sure is shorter and stouter than other diodes.

Here's a picture of the diodes in context. I had to remove some other components (that I eventually will need help identifying, like capacitors that look like resistors...) along with the diodes.

https://imgur.com/hk6PRKv

Let me know if theres anything else I can do to help identify them.

Thanks so much!
 

connorm

May 13, 2020
5
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May 13, 2020
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Thanks Bertus

How would using a slightly different diode effect the circuit? Is there a margin in the specs of diodes to where similar diodes will accomplish the same job?

Also let me clarify, I am dumb.

That being said, is there a way to measure the diode with a multimeter similar to measuring a resistor?
 

bertus

Moderator
Nov 8, 2019
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Hello,

It looks like the diodes are part of a switch matrix.
I do not think that they are defective, as very low currents are normaly used in those switch matrixes.

Bertus
 

connorm

May 13, 2020
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May 13, 2020
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The diodes themselves probably weren't defective but the corrosion had eaten through the legs a few of them and two tactile buttons.
 

connorm

May 13, 2020
5
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May 13, 2020
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Awesome thanks Bertus.

For the record though, is there a way to measure a diode to figure out it's specs?
 
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