smd code 431

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  • klynstronic
    Regulatory code marked as H50A
    by klynstronic
    Hello. Does anyone know the code for this regulator marked H50A A121?​...
    04-23-2025, 11:08 AM
  • klynstronic
    Help to identify the component code marked as .11.
    by klynstronic
    Hello. Could you help me identify the code for this component marked .11?
    It belongs to the BMW X1 automotive gear selector circuit.​...
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  • Document Archive
    LCD LED TV Service Menu Codes
    by Document Archive
    ALL LCD LED TV SERVICE MENU CODES

    Service Menu Code with Board Name

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    Veste/ LED TV Service Menu Code...
    10-31-2024, 03:58 AM
  • 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
  • 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
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