Battery charger repair No: 2. Diode replacement.

แชร์
ฝัง
  • เผยแพร่เมื่อ 24 ธ.ค. 2024

ความคิดเห็น • 30

  • @shed.projects5150
    @shed.projects5150 ปีที่แล้ว +1

    I have had one of these chargers for about 25yrs and still going well. Only problem with it is, about 5yrs ago I lent it to my son to charge his battery and he left it on boost all night and nearly melted his battery, and the boost facility has never worked since. I was not very happy with him .The instructions say not to leave it on boost for more than 30 seconds! I have always wondered if it was possible to fix it and now you have given me hope. I will check the diode and see what happens. Thanks for sharing. Paul UK.

    • @TheInfoworks
      @TheInfoworks  ปีที่แล้ว

      According to Frank Zappa, scientists think the hydrogen in the most common element is the universe, but he thinks stupidity is more common on earth. I reckon you will find the rectifier is the problem and if you are lucky, just one diode, cheers

    • @shed.projects5150
      @shed.projects5150 ปีที่แล้ว

      @@TheInfoworks thanks for that, I'll have a look and hope for the best.

  • @leslaidler292
    @leslaidler292 7 ปีที่แล้ว +2

    Thank you Andy. Very enlightening. Put across in a straightforward, no nonsense way. Good video.

  • @kayleighunicorn8873
    @kayleighunicorn8873 2 ปีที่แล้ว +1

    I have fixed lots of battery chargers with bad rectifier diodes by using GM SI, AD and So on Alternator Rectifier Diodes. Just mount the whole positive and negative bridges to heat sink and run all diodes together. With good heat sinking and chargers with cooling fans they do really well and out of All the charges I've fixed with Alt diodes, not a 1 has failed. They also work great in 12vdc power supplies with adidquite heat sinking and cooling. I've built 13.8 VDC Regulated supplies up to 35-40 amps with Alt diodes that ran 80+% duty cycle for HF linear amplifiers and Transmitters.

    • @TheInfoworks
      @TheInfoworks  2 ปีที่แล้ว

      Hi, yes car alternator rectifiers are great as they are, just using 2 of the 3 inputs. They are designed to be fan cooled but at 20% capacity I agree with you, they are fine, cheers

  • @massimobroccoli9854
    @massimobroccoli9854 7 ปีที่แล้ว +2

    Good video Andy, that charger will survive us !

  • @justinrichards2662
    @justinrichards2662 2 ปีที่แล้ว

    Very helpful video, I have a Rohr charger /starter which I think I have overloaded, using you help I will try to establish why it is only producing 10V output, what is the best place to get spare parts from.?

    • @TheInfoworks
      @TheInfoworks  2 ปีที่แล้ว

      Hi, thanks for the message, I have several battery charger repair videos, including one that was crushed. I normally use reclaimed parts were ever possible. It is often difficult to get parts from the manufacturer (and expensive), so search auction sites etc. Hope you have subscribed, cheers

  • @etech365
    @etech365 7 หลายเดือนก่อน

    Dear sir can i use Gunn Diode for battery charger

    • @TheInfoworks
      @TheInfoworks  7 หลายเดือนก่อน

      not sure, it's got to handle the current, they've got 3 legs, you could give it a try but better off with a power diode, cheers

  • @jimball816
    @jimball816 3 ปีที่แล้ว

    very helpful. testing diode direction confused me but this vid helped

    • @TheInfoworks
      @TheInfoworks  3 ปีที่แล้ว

      Cheers Jim, hope you've subscribed, cheers

  • @patrickkabuki7049
    @patrickkabuki7049 4 ปีที่แล้ว

    Hi.
    Are you in a position to tell me the ratings of the diods you have on such start-chargers? I am fixing one of my own... the diods are my unsolved equation. Thanks.

    • @TheInfoworks
      @TheInfoworks  4 ปีที่แล้ว

      Hi, just go for a high current diode that fits your rectifier plates, no need for high voltage it's just the current, cheers

  • @bobkatbry
    @bobkatbry 6 ปีที่แล้ว +1

    Where did you find new diodes? Were they a specific kind?

    • @TheInfoworks
      @TheInfoworks  6 ปีที่แล้ว +1

      Hi, I just looked in my box of mixed diodes and chose one that looked right, cheers

    • @undeserved1781
      @undeserved1781 6 ปีที่แล้ว +2

      man was that helpful hope the rest of the diodes in the box are bad

  • @nellsonsongok1522
    @nellsonsongok1522 2 ปีที่แล้ว

    How can repair a rectifier for aq-tron charger

    • @TheInfoworks
      @TheInfoworks  2 ปีที่แล้ว

      I'm not sure, either replace the solid state rectifier or find the blown diode and change that, subscribed? Cheers

  • @DayClanTribe
    @DayClanTribe 6 ปีที่แล้ว

    14:50 curious about your reading on DC+ with the clamp meter. I thought those were used on A/c lines? I know there are some available for DC but not commonly available?

    • @TheInfoworks
      @TheInfoworks  6 ปีที่แล้ว +1

      Hi, this one has both AC and DCcurrent functions, once you have one you would be lost without it for quick analytics. I hope you enjoy the rest of my video catalogue, Cheers

  • @noakeswalker
    @noakeswalker 7 ปีที่แล้ว +1

    The diodes in that charger don't look big enough to do much more than a nice charge current - if someone has taken the word 'start' too literally, I am surprised _any_ of the 4 diodes has survived ! The transformer won't do starting current even slightly either ....
    I know I mentioned this in your last charger repair vid Andy, but I drew the circuit out as you were pointing to bits in this one, and as far as I'm concerned the 12v output is _full wave_ rectified not half - wave rectified, just like the 24v. Though with one failed diode here, both outputs would indeed be only half wave rectified, hence the poor output :o)
    Have a look at this google image : www.talkingelectronics.com/projects/70InterestingCircuits/images/6v_12vPowerSupply.gif
    The bottom circuit is what you almost certainly have in your two chargers. Everywhere it says '6v', read that as '12v' , and where it says '12v' read that as '24v' for your chargers. Sorry, short of drawing it out for you myself, I couldn't find a better diagram of what you have on Google ! NB... _both_ outputs are full wave rectified ! Let me know if you need more explanation......
    Cheers, Dave

    • @TheInfoworks
      @TheInfoworks  7 ปีที่แล้ว

      Dave, yes I fully agree with you on the quality of the components, but it's a Clarke and so low end equipment. I suspect Sealy sell the same as it's own . Thanks for the link. I need to discuss this further. From my point of view there is no diode on the centre tap, but having considered your thoughts maybe the negative half of the wave is canelled out by the negative from the rectifier through the battery and so there is no current flow. This just leaves the positive with a path for the current to flow. Cheers, Andy

    • @noakeswalker
      @noakeswalker 7 ปีที่แล้ว

      Clarke stuff is cheap and cheerful I guess ! I will have to give this some more thought Andy - as this dual voltage circuit is a combination of 2 types of rectification - one using 4 diodes in a bridge and the other using 2 diodes and a CT transformer secondary - we need to ignore the 24v output components when looking at the 12v output circuit, or it'll just be confusing... so ignore the two diodes that go to the 24v output, they do nothing at all when considering only the 12v output....ok ?
      In one sentence - the 12v circuit can be thought of as 2 half wave rectification circuits combined together - each of these consists of one half of transformer secondary, one diode, and the load battery, and because of the way that each half of a CT secondary winding swings +ve and -ve alternately (think of the CT as a pivot point here) each half cycle, and, importantly, _out of phase with each other_ , each of the two half wave rect. loops is active for a different half cycle, so if you then connect these to half wave outputs together, the two waveforms interleave with each other and you get a full wave rectified output - bingo ! I'll email some more tomorrow when I'm more awake.... Dave

    • @MrKittyMC
      @MrKittyMC 6 ปีที่แล้ว

      noakeswalker v

  • @dimashpor4562
    @dimashpor4562 ปีที่แล้ว

    Hi

  • @AmigaA-or2hj
    @AmigaA-or2hj 5 ปีที่แล้ว

    Thanks for the tip.