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Empava KQC65C-17 Built-in Convection Electric Oven - display problem

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    Empava KQC65C-17 Built-in Convection Electric Oven - display problem

    My friend asked me to check this oven display, its Empava KQC65C-17, and the part is not available even from the manufacturer. On the bottom of the first pic temperature digits have some LEDs off. Im trying to figure out what parts/components could be the culprit so I can test them. Also what connectors I should use to power it on? I only have those two boards in the house, not the entire oven, but looks like it can be powered on from 110 or 220V.
    Attached Files

    #2
    Re: Built-in Convection Electric Oven - display problem

    get a 3v coincell battery and try to light all the segments.
    there is a good chance the actual leds are bad.
    notice the uneven brightness in the working ones!

    Comment


      #3
      Re: Built-in Convection Electric Oven - display problem

      what points I should use to connect 3V? Should I use 5V/gnd pins on the power board (pic #5)? This connector goes to the display board. I have 5V DC adapters I can use, also lipo batteries 3.7-4.2V.

      This is part of the board on the backside of display, top left are connector pins
      Attached Files
      Last edited by sansonet; 02-26-2022, 07:43 AM.

      Comment


        #4
        Re: Empava KQC65C-17 Built-in Convection Electric Oven - display problem

        Dose this display pins go to an ic chip of some type if dose then might be a chance that that chip could be this issue or if the display has a multiplex common pin that connects all the diodes to a common negative or positive terminal I have seen these displays do this when they fail

        I not a big fan of this type of display
        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

        Comment


          #5
          Re: Empava KQC65C-17 Built-in Convection Electric Oven - display problem

          Originally posted by sam_sam_sam View Post
          I am not a big fan of this type of display
          yes, it's only 5 y.o., but useless now without being able to set up the temperature. The manufacturer would not even sell this part because they said it's "too old" and they don't carry it anymore.
          I still trying to figure out how to power it up, can't do much without it.

          Comment


            #6
            Re: Empava KQC65C-17 Built-in Convection Electric Oven - display problem

            the display is matrix driven and the chip is probably a Holtek clone

            Comment


              #7
              Re: Empava KQC65C-17 Built-in Convection Electric Oven - display problem

              He sent me pic of how it was wired before disconnection
              Attached Files

              Comment


                #8
                Re: Empava KQC65C-17 Built-in Convection Electric Oven - display problem

                I look up this brand and found that there products are not cheap to buy for something that seems to be made in China

                $600.00 to over $1000.00 the question I have is how good is there quality for the money and not to offer repair parts is very big problem for me when deciding on buying something like that
                Last edited by sam_sam_sam; 03-05-2022, 08:56 AM.
                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

                Comment

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