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Amazon smart plug no power no response

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    Amazon smart plug no power no response

    Hi, Guys, my amazon smart plug has stopped working I tried to reset it holding the button in but still the same I have managed to pry it open just not sure where to check for output to the circuit and where to check for voltages...

    Any help will be much appreciated

    Thanks
    Attached Files
    Your never to old to learn

    #2
    Re: Amazon smart plug no power no response

    Check the ic chip part numbers and see if you can find one that is some type of switching power supply regulator
    9 PC LCD Monitor
    6 LCD Flat Screen TV
    30 Desk Top Switching Power Supply
    10 Battery Charger Switching Power Supply for Power Tool
    6 18v Lithium Battery Power Boards for Tool Battery Packs
    1 XBox 360 Switching Power Supply and M Board
    25 Servo Drives 220/460 3 Phase
    6 De-soldering Station Switching Power Supply 1 Power Supply
    1 Dell Mother Board
    15 Computer Power Supply
    1 HP Printer Supply & Control Board * lighting finished it *


    These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

    1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
    2 Hem Saw Computer Stack Board

    All of these had CAPs POOF
    All of the mosfet that are taken out by bad caps

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      #3
      Re: Amazon smart plug no power no response

      I would first check the fuse (square black box). The whole device is at hazardous live, there is no isolation or anything. Making any voltage measurements, you have to be careful. U2 LNK625? DG is the SMPS IC.
      Try not to bump the WiFi card, the solder connections break to the PSU board easily.
      Last edited by redwire; 02-13-2020, 01:01 PM.

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        #4
        Re: Amazon smart plug no power no response

        if you fix it you should install Tasmota on it.
        https://tasmota.github.io/docs/#/Home

        take the control away from Amazon.

        Comment


          #5
          Re: Amazon smart plug no power no response

          Thanks, guys for the help I have found a data sheet on this chip but not sure what voltages I should be looking for on the pins where would I put my negative probe it's so compact

          Thanks
          Attached Files
          Your never to old to learn

          Comment


            #6
            Re: Amazon smart plug no power no response

            replace any electrolytic capacitor connected to the BYPASS pin.
            Attached Files

            Comment


              #7
              Re: Amazon smart plug no power no response

              Hi, guys, I tried to get voltage from the output of the bridge rectifier to check output voltage and I must have made some contact with the pins but it made some bang even tho it was on the output side of the rectifier I will need to order a new fuse and hopefully I haven't damaged anything
              Attached Files
              Your never to old to learn

              Comment


                #8
                Re: Amazon smart plug no power no response

                maybe damaged the rectifier

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