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Oven LCD display dim and uneven

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    #21
    Re: Oven LCD display dim and uneven

    The displays to wear out, they loose emission similar to a crt in a tv. The display is brighter over the heater wires which makes sense. The display tube should be a 100% vacuum but that can also change over time as a bit of air gets in.
    You might try someone that deals in used appliances, you might find a used panel or a similar panel with the same vfd.
    Last edited by R_J; 10-15-2018, 11:40 AM.

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      #22
      Re: Oven LCD display dim and uneven

      I solve such problems by soldering panel component

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        #23
        Re: Oven LCD display dim and uneven

        What do you mean you "fixed such problems by soldering panel components"? Did you just re-solder the VFD display ?

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          #24
          Re: Oven LCD display dim and uneven

          Originally posted by Hafizit View Post
          I solve such problems by soldering panel component
          Can you elaborate on this???

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            #25
            Re: Oven LCD display dim and uneven

            perhaps check the VFD display solder connections to the main board? if you can inspect them wth a magnifying glass. You might see solder joints that are cracked. reflowing the joints with some 60/40 might help if they are losing conductivity.

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              #26
              Re: Oven LCD display dim and uneven

              I am having the same problem with control board #3116090102. Going to try the cap route and inspection. After reading through the thread, I hope that I have better luck.

              Seens that I have to purchase caps in batch quantities. My cap values match those listed in the thread. Good job on making your problem and approach clear and conconcise. The pictures and list are helpful.

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                #27
                Re: Oven LCD display dim and uneven

                Look at the soldering joints on the display pins and if the soldering joints are not shine then remove the solder form each soldering joints and resolder each joint and see if this makes any difference in the display

                Also replace all the capacitors on this board as well
                Last edited by sam_sam_sam; 12-06-2020, 05:32 PM.
                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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