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Through hole Diode Identification

Discussion in 'Datasheets, Manuals and Component Identification' started by connorm, May 13, 2020.

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  1. connorm

    connorm

    5
    0
    May 13, 2020
    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
     
    Last edited by a moderator: May 13, 2020
  2. Hunter64

    Hunter64

    51
    18
    Nov 20, 2018
    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.
     
    Last edited: May 13, 2020
    davenn likes this.
  3. PETERDECO

    PETERDECO

    237
    58
    Dec 19, 2019
    It looks a little fatter than a 1N4148. I use zener diodes that look like this. What is this circuit? Make, model, function?
     
  4. Martaine2005

    Martaine2005

    4,085
    1,116
    May 12, 2015
    Perhaps this 1s2473? Your camera angle may be making it look fatter?

    [​IMG]

    Martin
     
  5. Hunter64

    Hunter64

    51
    18
    Nov 20, 2018
  6. connorm

    connorm

    5
    0
    May 13, 2020
    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!
     
  7. bertus

    bertus Moderator

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    977
    Nov 8, 2019
  8. connorm

    connorm

    5
    0
    May 13, 2020
    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?
     
  9. bertus

    bertus Moderator

    2,503
    977
    Nov 8, 2019
    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
     
    Cannonball likes this.
  10. connorm

    connorm

    5
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    May 13, 2020
    The diodes themselves probably weren't defective but the corrosion had eaten through the legs a few of them and two tactile buttons.
     
  11. bertus

    bertus Moderator

    2,503
    977
    Nov 8, 2019
    Hello,

    The 1N914 or 1N4148 will likely do in the circuit.

    Bertus
     
    Cannonball likes this.
  12. connorm

    connorm

    5
    0
    May 13, 2020
    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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