Makkita cap id requird if anyone can help

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  • ukdirtyboy
    Member
    • Aug 2012
    • 27
    • uk

    #1

    Makkita cap id requird if anyone can help

    a friend of mine treid to charge his drill battery from a generator his charger went bang its a Makkita DC1804 f Battery charger blown a fuse and cap can anyone advise a replacement cap friom the photos



    thanks steve
    Attached Files
    Last edited by ukdirtyboy; 11-26-2012, 05:53 AM.
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Makkita cap id requird if anyone can help

    Please remove the pictures and use "Go Advanced" to upload the pictures instead.
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809

    Comment

    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA

      #3
      Re: Makkita cap id requird if anyone can help

      I believe that is an MOV for surge protection, I need to see the bottom side of the board.
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

      Comment

      • ukdirtyboy
        Member
        • Aug 2012
        • 27
        • uk

        #4
        Re: Makkita cap id requird if anyone can help

        changed links Sorry And uploader underside

        Comment

        • ukdirtyboy
          Member
          • Aug 2012
          • 27
          • uk

          #5
          Re: Makkita cap id requird if anyone can help

          Originally posted by budm
          I believe that is an MOV for surge protection, I need to see the bottom side of the board.
          thankyou for any help you can give

          Comment

          • selldoor
            Slow Learner
            • Dec 2010
            • 7870

            #6
            Re: Makkita cap id requird if anyone can help

            @budm - he has added pic in original post.

            can you remove the items from the board The black box cap may have suffered as well.

            Clean them up with isopropyl alcohol there may still be some letters numbers visible on the mov
            Please upload pictures using attachment function when ask for help on the repair
            http://www.badcaps.net/forum/showthread.php?t=39740

            Comment

            • japlytic
              Badcaps Legend
              • Oct 2005
              • 2086
              • Australia

              #7
              Re: Makkita cap id requird if anyone can help

              I have read that conventional portable generators have limited output regulation and can go way above normal rated output voltage and therefore damage anything connected to the output - and I have also read that portable safety switch may be damaged by a generator (the conventional kind, of course).

              Inverter generators do not have this problem, and are more efficient, which means the motor speed changes on load demand and the inverter section provides good output voltage regulation regardless of motor speed or load.
              My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.

              Comment

              • ukdirtyboy
                Member
                • Aug 2012
                • 27
                • uk

                #8
                Re: Makkita cap id requird if anyone can help

                cant see a lot on it damage to middle of numbers can see 10431 i think but very damaged
                Attached Files

                Comment

                • selldoor
                  Slow Learner
                  • Dec 2010
                  • 7870

                  #9
                  Re: Makkita cap id requird if anyone can help

                  Hi yes it probably says 10D431K is it 1 cm across ie 10MM - 10D

                  This will give you the details is there a farnells near nottingham?
                  They are cheap to buy postage and packing and min order is the problem

                  http://uk.mouser.com/ProductDetail/B...DnM/8qrIoF0oTo

                  EDIT

                  There is an RSonline in/near Nottingham they might have something suitable
                  http://uk.rs-online.com/web/generalD...=branchNetwork
                  Last edited by selldoor; 11-26-2012, 08:00 AM.
                  Please upload pictures using attachment function when ask for help on the repair
                  http://www.badcaps.net/forum/showthread.php?t=39740

                  Comment

                  • ukdirtyboy
                    Member
                    • Aug 2012
                    • 27
                    • uk

                    #10
                    Re: Makkita cap id requird if anyone can help

                    yeah that looks about right is this the same thing
                    http://www.ebay.co.uk/itm/Metal-Oxid...item1c1ce98200
                    if so i will order that cos notts is a 45 min drive from here

                    Comment

                    • kc8adu
                      Super Moderator
                      • Nov 2003
                      • 8832
                      • U.S.A!

                      #11
                      Re: Makkita cap id requird if anyone can help

                      what shorted to the fuse?
                      and check the generator carefully.it likely has a problem.governor linkage stuck/damaged?

                      Comment

                      • ukdirtyboy
                        Member
                        • Aug 2012
                        • 27
                        • uk

                        #12
                        Re: Makkita cap id requird if anyone can help

                        nothing as far as i am aware
                        generator is still working fine

                        Comment

                        • selldoor
                          Slow Learner
                          • Dec 2010
                          • 7870

                          #13
                          Re: Makkita cap id requird if anyone can help

                          Originally posted by ukdirtyboy
                          yeah that looks about right is this the same thing
                          http://www.ebay.co.uk/itm/Metal-Oxid...item1c1ce98200
                          if so i will order that cos notts is a 45 min drive from here

                          Yes -good spot- missed that when I was googling - skipped straight past it to some info further down. I cant of course guarantee that is what it did say on the burnt one but seems a reasonable guess if it is 10mm across.
                          Please upload pictures using attachment function when ask for help on the repair
                          http://www.badcaps.net/forum/showthread.php?t=39740

                          Comment

                          • ukdirtyboy
                            Member
                            • Aug 2012
                            • 27
                            • uk

                            #14
                            Re: Makkita cap id requird if anyone can help

                            for the money i will fit it and stand well back
                            cheers for your help

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA

                              #15
                              Re: Makkita cap id requird if anyone can help

                              275V MOV: 10mm Diameter, D is the MOV series, 431 = 275V R.M.S is the rated voltage, selldoor got the correct spec.
                              That generator must have gone up to 500VAC or more to blow that MOV. We had our problem with people using our product with cheaply made generator with poor regulator, I always suggest them to put 100W lamp at the outlet to give it the light load and it is also used as an indicator since most people will not have Volt meter to check the output.
                              Never stop learning
                              Basic LCD TV and Monitor troubleshooting guides.
                              http://www.badcaps.net/forum/showthr...956#post305956

                              Voltage Regulator (LDO) testing:
                              http://www.badcaps.net/forum/showthr...999#post300999

                              Inverter testing using old CFL:
                              http://www.badcaps.net/forum/showthr...er+testing+cfl

                              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                              http://s807.photobucket.com/user/budm/library/

                              TV Factory reset codes listing:
                              http://www.badcaps.net/forum/showthread.php?t=24809

                              Comment

                              • randtek
                                Badcaps Veteran
                                • Oct 2011
                                • 280
                                • US

                                #16
                                Re: Makkita cap id requird if anyone can help

                                FYI, While you are waiting for the MOV to arrive, you can just replace the fuse, and the charger will work just fine. The only down side is that the charger will have no surge protection. The MOV is only used for surge protection. It has no function in the actual operation of the charger.

                                Comment

                                • 999999999
                                  Badcaps Veteran
                                  • Sep 2006
                                  • 774
                                  • USA

                                  #17
                                  Re: Makkita cap id requird if anyone can help

                                  ^ Maybe it will operate ok, but as of yet there is no guarantee the MOV was the only thing damaged.

                                  Comment

                                  • budm
                                    Badcaps Legend
                                    • Feb 2010
                                    • 40746
                                    • USA

                                    #18
                                    Re: Makkita cap id requird if anyone can help

                                    Should check the rectifier Diodes (4 of them, I can see at least D12 in the pictures), also use ohm meter across that large DC filter cap and see if it shows low resistance AFTER you VERIFY that there is no DC still on that cap, otherwise you need to discharge if first.
                                    Never stop learning
                                    Basic LCD TV and Monitor troubleshooting guides.
                                    http://www.badcaps.net/forum/showthr...956#post305956

                                    Voltage Regulator (LDO) testing:
                                    http://www.badcaps.net/forum/showthr...999#post300999

                                    Inverter testing using old CFL:
                                    http://www.badcaps.net/forum/showthr...er+testing+cfl

                                    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                                    http://s807.photobucket.com/user/budm/library/

                                    TV Factory reset codes listing:
                                    http://www.badcaps.net/forum/showthread.php?t=24809

                                    Comment

                                    • randtek
                                      Badcaps Veteran
                                      • Oct 2011
                                      • 280
                                      • US

                                      #19
                                      Re: Makkita cap id requird if anyone can help

                                      Originally posted by 999999999
                                      ^ Maybe it will operate ok, but as of yet there is no guarantee the MOV was the only thing damaged.
                                      True, this is electronics, and there are no guarantees. But if the MOV has been properly selected for the application, it is rare for the circuitry beyond it to be damaged. That is the reason for having it in there in the first place. And if there is some other failed component(s), you can troubleshoot it without having to replace the MOV.

                                      Looking at my previous post, I guess I should have said "will PROBABLY work OK", but I must post things quickly (cannot spend much time on here during working hours) so sometimes I cannot proofread as well as I should.
                                      Last edited by randtek; 11-28-2012, 06:19 AM. Reason: corrected typos

                                      Comment

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