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    Help identifying components

    Hey guys I'm having a bit of an issue identifying some components on a circuit board and was hoping someone could possibly help me out. The board is from my dash panel in my car and it's died or rather voltage protection has kicked in as it's seeing 24v instead of 12v I've narrowed it down to some resistors mounts on the board through trail and error but can't find the values anywhere to order some replacements the first pic is a group of 5 in the centre and the second pic is a resistor on its own. I say resistor but I'm not 100% sure.

    I realise I'm asking a lot but I really need help and cant think of anything else to try.

    Many thanks in advance

    Neil
    Attached Files

    #2
    Re: Help identifying components

    wondering if they could be colour coded fuses ..

    Comment


      #3
      Re: Help identifying components

      I’m not sure my friend I thought they were melf resistors. When I applied abit of heat trying the see if there were any dry joints the voltage reading changed. Also I measure resistance with my fluke and got a reading but am unsure if the value given is correct

      Comment


        #4
        Re: Help identifying components

        cant remember seeing resistors like that before .

        Comment


          #5
          Re: Help identifying components

          They are melf resistors

          Comment


            #6
            Re: Help identifying components

            Sweet do you know how I can read the values I'm sorry but I can't seem to see the beginning or end as they look pretty evenly banded.

            Comment


              #7
              Re: Help identifying components

              it will be the standard resistor color code, the dots are near band 4 or band 6 and are TC (Temperature Coefficient Marking)
              Attached Files
              Last edited by R_J; 01-01-2019, 08:35 PM.

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                #8
                Re: Help identifying components

                Thanks buddy I’ll look at the ones without the dotted bands and try and make an educated guess

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                  #9
                  Re: Help identifying components

                  What do you mean by "voltage protection has kicked in as it’s seeing 24v instead of 12v" I doubt the resistors are bad

                  Comment


                    #10
                    Re: Help identifying components

                    Originally posted by R_J View Post
                    it will be the standard resistor color code, the dots are near band 4 or band 6 and are TC (Temperature Coefficient Marking)
                    Thanks for sharing this chart
                    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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