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  • caspian
    What Zener Diodes on a Linear Power Supply
    by caspian
    Dear members,

    I have a linear variable power supply with unknown brand name that I used for voltage injection.
    Then it failed. I discovered that its transistors (Q1 and Q2) are shorted.
    In addition, I discovered that its zener diodes are defective.
    I can replace the burned transistors.
    But I do not know the model of the zener diodes. the model number is not marked on the zener diodes.
    Therefore, I cannot replace the zener diodes.
    I do not want to test the zener diodes in a test circuit to discover their model or value.
    no schematics are available...
    05-26-2025, 12:38 PM
  • AllElectronicsRepairs
    Possibly Zener diode identification
    by AllElectronicsRepairs
    Hi Everyone. I have a shorted diode marked 15A 435. It's most likely a Zener since it was connected with the anode to the ground. I tried to find its reverse voltage value on the internet without success. Can anybody help?
    02-09-2023, 07:54 PM
  • nev1001
    What zener diode might fix the sound on Maestro Mayhem gaming chair?
    by nev1001
    Hi, I'm looking for a bit of help trying to fix the audio unit from a Maestro Mayhem 4.1 gaming chair please.

    The chair has a few speakers and vibration motors. All was well, for a while, but now the sound is gone.

    It may be significant that I discovered my son was powering it with a 19V laptop charger when it should run on 12V - it did fully work, for bit.

    I think an issue could be a zener diode (or capacitor) which has shorted out.

    The board's bluetooth input still works, the vibration motors are working, so is the line out socket but not the...
    04-17-2025, 05:09 PM
  • sam_sam_sam
    NTE Electronics “NTE5251K” Zener Diode 9.1V @ 50W Do-5.5% Want to build a 9.1 output from a 9.6 lipo4 battery pack
    by sam_sam_sam
    I have bought this Zener Diode for this project what size and wattage resistor value do I need to use to get near 50 watt output
    I bought this from an eBay seller but unfortunately they only had one

    I bought three from Vetco Electronics these are Sylvania ECG5185A 9.1@10w A to Stud what size and watt resistor do I need to use to get near 10 watt output
    I bought three of from them to also make battery packs with this output power limit in mind

    I want to use this battery pack and turn it into a 9.1 output battery pack output to eliminate using 9 volt battery...
    04-23-2025, 05:50 AM
  • unimatrix93
    TV backlight zener diode
    by unimatrix93
    Hello everyone, I'm repairing an LG TV backlight and I noticed some strange behavior when I touching the backlight strip with a missing Zener diode.

    So I replaced the leds on the strips and they seemingly working fine, but soon as I touch the strip which has a missing Zener diode the whole backlight turns off for a few seconds and then turns back on.

    Is this caused by the missing diode? If so what kind of zener diode should I use to replace it?.
    ​​​​
    The led strips has 9 6V leds.


    ​​​
    02-10-2025, 12:13 PM
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