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Unknown Smd Diode probably.

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    Unknown Smd Diode probably.

    Hello,
    i need help with a bad smd diode i have on a sony projector inverter.
    Watch the photo i attached.
    Thank you for your help.
    Attached Files

    #2
    Re: Unknown Smd Diode probably.

    It might me a 28 volt TVS diode SMAJ28A marked "CG". If it checks shorted it will be bad, if it checks open it is liklely good.
    Last edited by R_J; 11-21-2019, 03:34 PM.

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      #3
      Re: Unknown Smd Diode probably.

      Yes its bad. I checked it . How sure you are about the SMAj28A.
      The board i am fixing is very rare and the one i find has 150$ + import charges.

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        #4
        Re: Unknown Smd Diode probably.

        It is hard to make out the exact letters but the logo seems to be for Tiawan Semiconductor I see the first letter is a "C" but is the second a "G" or could it be a "0" similar to this Ø ?

        When you say it is BAD do you mean it is shorted? where is it in the circuit? is it a diode that supplies a voltage from a tranformer or is it a protection diode across a supply voltage like a zener?
        You say it is in the inverter, I take it you mean the lamp inverter, correct?
        Maybe post a picture of the complete board (both sides) and the Model of the projector.
        It could also be a non standard or custom part number stamped on the diode for the inverter manufacture
        Last edited by R_J; 11-22-2019, 01:04 PM.

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          #5
          Re: Unknown Smd Diode probably.

          Yes this diode its shorted. I attached the picture to see the circuit.
          The boards part number is 4h.1nt40.a02
          Attached Files

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            #6
            Re: Unknown Smd Diode probably.

            So i replace the original diode with the SMAJ28A
            but i get no results.

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