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DMR115 , Makita on site radio

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    DMR115 , Makita on site radio

    Hi all

    Trying to take this thing apart & there are 2 screws buried deep in the back of unit .

    Look like torx of hexagonal heads .

    Can anyone help with type & size of driver required ?

    #2
    Re: DMR115 , Makita on site radio

    Depending on what country you live in but if you live in the USA you can go to Harbor Freight and buy a set of all kinds of bits and there should be one that fits
    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


      #3
      Re: DMR115 , Makita on site radio

      Thanks Sam

      Pulled up the exploded view , & seems to use M3 HEX type screws

      Ordered a 4 piece set of long bits from Ebay .

      Hopefully one of them will fit .

      Comment


        #4
        Re: DMR115 , Makita on site radio

        Contrary to exploded view ,the head is actually a Torx type .

        It's a TX15 & needs to be a minimum of 100 mm in length to reach screw .

        How do i know ? , well ended up sacrificing a long HEX 3 mm bit , which i filed down enough to grip screws , then remove them .

        Now to deal with no power issue .

        Schematic would be handy
        Attached Files

        Comment


          #5
          Re: DMR115 , Makita on site radio

          Discovered an SMD fuse O/C , next to connector CN4 .

          Might be lucky for a change .

          I would gauge it's value at just over 3 AMP , as battery is rated at 3 AMP & the charger 2.5 AMP .

          Will replace it & hope for the best .
          Attached Files

          Comment


            #6
            Re: DMR115 , Makita on site radio

            Fuse marked T , which is 5 AMP .

            Replacement restored power

            Comment


              #7
              Re: DMR115 , Makita on site radio

              that screw is a security-torx,
              what a bunch of fucks!

              Comment


                #8
                Re: DMR115 , Makita on site radio

                A lot of stuff I open lately have that security torx screw.

                Comment


                  #9
                  Re: DMR115 , Makita on site radio

                  yes, but they arent usually used in deep recesses - i find tri-wing in those types of casing

                  Comment


                    #10
                    Re: DMR115 , Makita on site radio

                    wait till you find the custom ones that only the manufacturers have the correct tools .
                    such as these ..
                    https://www.fastenright.com/brand/ultra-drive
                    Last edited by petehall347; 06-16-2022, 04:23 AM.

                    Comment


                      #11
                      Re: DMR115 , Makita on site radio

                      lol
                      a lot of those can be opened with a small flathead.

                      the ones with dimples i open with a flathead with a notch ground out of the center

                      Comment


                        #12
                        Re: DMR115 , Makita on site radio

                        Wow Peter

                        As if this trade wasn't difficult enough

                        Comment


                          #13
                          Re: DMR115 , Makita on site radio

                          adapt and overcome.
                          i have lots of cheap screwdriver sets from £ stores.
                          i dont care if i have to file or grind them to fit a specific job.

                          Comment


                            #14
                            Re: DMR115 , Makita on site radio

                            Yes , we are quite resourceful

                            Comment


                              #15
                              Re: DMR115 , Makita on site radio

                              Originally posted by zen View Post
                              Fuse marked T , which is 5 AMP .

                              Replacement restored power
                              Hello,
                              I have the same problem, replaced the fuse, works fine, but now only way to switch off the radio is to remove the battery.

                              Any ideas why this would happen?

                              Many thanks
                              COYI

                              Comment

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