Mobility scooter charger dead 6240803

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • DiamondTech61
    Senior Member
    • Aug 2021
    • 61
    • united kingdom

    #1

    Mobility scooter charger dead 6240803

    Hi I have a mobility scooter charger that's dead, uve checked the main fuse and internal fuse which are fibe, the main capacitor is showing about 320v on its output but I have no idea what to check next, hopefully someone can help with the supplied pictures
    Attached Files
  • CapLeaker
    Leaking Member
    • Dec 2014
    • 8146
    • Canada

    #2
    Re: Mobility scooter charger dead 6240803

    explain exactly what you charger is or is not doing. for example is it stone dead, are these LED lights doing anything? Etc. Is the secondary shorted because someone hooked it up backwards? Each little information counts.

    Comment

    • petehall347
      Badcaps Legend
      • Jan 2015
      • 4426
      • United Kingdom

      #3
      Re: Mobility scooter charger dead 6240803

      this dont look good .
      Attached Files

      Comment

      • DiamondTech61
        Senior Member
        • Aug 2021
        • 61
        • united kingdom

        #4
        Re: Mobility scooter charger dead 6240803

        Originally posted by CapLeaker
        explain exactly what you charger is or is not doing. for example is it stone dead, are these LED lights doing anything? Etc. Is the secondary shorted because someone hooked it up backwards? Each little information counts.
        Its stone dead, no LEDs or anything.

        Comment

        • DiamondTech61
          Senior Member
          • Aug 2021
          • 61
          • united kingdom

          #5
          Re: Mobility scooter charger dead 6240803

          Originally posted by petehall347
          this dont look good .
          Thanks for pointing that out, Ill look into that and give it a clean up and resolder

          Comment

          • CapLeaker
            Leaking Member
            • Dec 2014
            • 8146
            • Canada

            #6
            Re: Mobility scooter charger dead 6240803

            There are a few fuseable resistors with a zero ohm value, rectifier diodes, fets and a few small bridge rectifiers. Check those. You got power laying on the main filter capacitor, right?
            Forgot to mention, resolder all transformers and anything that has some weight to it.
            Last edited by CapLeaker; 04-11-2023, 06:44 AM.

            Comment

            • DiamondTech61
              Senior Member
              • Aug 2021
              • 61
              • united kingdom

              #7
              Re: Mobility scooter charger dead 6240803

              ok, ill start with the easy option first by cleaning up and soldering, can someone maybe draw a rough path of the power going through? Should the 2 big coils be DC? Also, what's the best way to discharge the main capacitor, is it just a 1w resistor across the points? Ive just been leaving it to discharge slowly but it takes ages, thanks for all your help and info!

              Comment

              • DiamondTech61
                Senior Member
                • Aug 2021
                • 61
                • united kingdom

                #8
                Re: Mobility scooter charger dead 6240803

                ok so Ive soldered all the connections and its still the same, im not really sure what to check next

                Comment

                • petehall347
                  Badcaps Legend
                  • Jan 2015
                  • 4426
                  • United Kingdom

                  #9
                  Re: Mobility scooter charger dead 6240803

                  is that a crack ?
                  on another note some chargers wont start if the battery is too low .
                  Attached Files

                  Comment

                  • DiamondTech61
                    Senior Member
                    • Aug 2021
                    • 61
                    • united kingdom

                    #10
                    Re: Mobility scooter charger dead 6240803

                    Hi, no its not cracked, I think it's just the light in the pic, it used to have leds light up but now nothing. I'm guessing it HAS to be something on the right half of the board as 300v is going to large capacitor. I have no idea what to test on it, could someone maybe draw on it where to test? I need an idiots guide 🙄
                    Attached Files

                    Comment

                    • petehall347
                      Badcaps Legend
                      • Jan 2015
                      • 4426
                      • United Kingdom

                      #11
                      Re: Mobility scooter charger dead 6240803

                      how low is the voltage of the battery pack ?

                      Comment

                      • DiamondTech61
                        Senior Member
                        • Aug 2021
                        • 61
                        • united kingdom

                        #12
                        Re: Mobility scooter charger dead 6240803

                        I would have to check but I know it charges fine from another charger

                        Comment

                        • petehall347
                          Badcaps Legend
                          • Jan 2015
                          • 4426
                          • United Kingdom

                          #13
                          Re: Mobility scooter charger dead 6240803

                          ok just trying to rule out simple things first .

                          Comment

                          • DiamondTech61
                            Senior Member
                            • Aug 2021
                            • 61
                            • united kingdom

                            #14
                            Re: Mobility scooter charger dead 6240803

                            No I understand completely, Ive made silly mistakes like that in the past lol

                            Comment

                            • DiamondTech61
                              Senior Member
                              • Aug 2021
                              • 61
                              • united kingdom

                              #15
                              Re: Mobility scooter charger dead 6240803

                              can someone maybe draw on the pictures the route of the power and where I should be measuring?

                              Comment

                              • CapLeaker
                                Leaking Member
                                • Dec 2014
                                • 8146
                                • Canada

                                #16
                                Re: Mobility scooter charger dead 6240803

                                I've circled stuff to check. Start with the small bridge rectifier and the 2 caps near the LEDs.
                                Attached Files

                                Comment

                                • lotas
                                  Badcaps Legend
                                  • Jan 2016
                                  • 4589
                                  • Russia

                                  #17
                                  Re: Mobility scooter charger dead 6240803

                                  Check the primary resistance (1-2) on the transformer, it has an internal fuse and it may have blown.
                                  Attached Files

                                  Comment

                                  Related Topics

                                  Collapse

                                  • BTubbs200
                                    Dead Dell Latitude 5420 not receiving 20 volts from USB-C charger
                                    by BTubbs200
                                    Hello,

                                    Dell Latitude 5420 P137G
                                    Board: LA-K491P REV A01

                                    I have received this laptop which was described as "does not power on or accept charge." Battery shows no sign of charging when charger is plugged in, nor does the board show any signs of life when battery is unplugged and charger is plugged in. No light from the LED at all or any other indications of activity.

                                    Board seems to have no shorts, all power rails are fine and show high resistance.

                                    When charger is plugged in, voltage is present in 3.3V rail but absent in others....
                                    01-24-2025, 08:15 PM
                                  • flat-earther
                                    ASUS X54H laptop thinks it's always charging even with charger unplugged
                                    by flat-earther
                                    The charging indicator light on my ASUS X54H laptop is always on even when the charger is disconnected.

                                    Windows also shows ''Plugged in'' when charger is not connected.

                                    This problem started year ago gradually, when unplugging the charger the charging light took several seconds to disappear, then minutes, and now almost always on even when unplugged for an entire day.
                                    Strangely, before sometimes immediately when plugging in the charger the charging light went away, and later came back with it connected.
                                    If I let battery run out and say it has 3% Windows will...
                                    06-24-2025, 09:32 AM
                                  • motormayhem
                                    Lenovo T460 Only Charges on One Charger
                                    by motormayhem
                                    Laptop Question
                                    Hello,
                                    I'm working on a Lenovo T460 that has been having trouble charging as of late. Its worked well since I've owned it for a few years. When I went to use it the other day it was dead and wouldn't turn on (was sitting on an Anker 65W GaN charger). After some fiddling with the charger I got it to turn on and start charging, but seemed like the charger was not working as it should (took a few plug and unplug cycles to get it to start charging).

                                    A day later it was dead again and wouldn't boot/charge no matter what I did. No lights or anything when...
                                    05-12-2023, 01:46 PM
                                  • dellxps15
                                    macbook a1707 15 inch trackpad dead. blown fuse identification
                                    by dellxps15
                                    hi all, got this macbook with dead trackpad. after some investigation i found that fuse is bwlown. it's marked with a K on it. anyone kjnow it's value ? it is a 0402 package.

                                    another problem is: i tried another trackpad that was working fine, but the feedback sensor was not. all volts are present, but the click mechanism isnt .
                                    04-30-2024, 10:48 AM
                                  • Document Archive
                                    ISL88739AHRZ ISL88739 Laptop Battery Charger Datasheet
                                    by Document Archive
                                    The ISL88739 & ISL88739AHRZ are a highly versatile combo battery charger
                                    configurable for operating as either a Hybrid Power Boost (HPB)
                                    charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or
                                    4-cell batteries. Both configurations allow the battery to work with
                                    the adapter together to supply the system load when it exceeds
                                    the adapter capability, referred to as system Turbo mode. HPB
                                    charger configuration reverse-boosts battery energy to the system
                                    bus to help the adapter provide the system power in Turbo mode.
                                    NVDC charger configuration...
                                    11-05-2024, 03:28 PM
                                  • Loading...
                                  • No more items.
                                  Working...