CTEK MXS 5.0 Car battery charger dead no power solution repair - Can it be fixed? Bad capacitors?

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  • Опубликовано: 12 дек 2024

Комментарии • 23

  • @tamasbalog9339
    @tamasbalog9339 3 месяца назад

    Good job! It helped me to repair my Ctek too. Thanks a lot for sharing!

    • @varnasfix
      @varnasfix  3 месяца назад

      Thank you for your comment! Glad the video helped!

  • @tamastorontali3339
    @tamastorontali3339 8 месяцев назад +1

    Hi! Nice work. I think it's even more interesting if you present fault finding and measurements as well, not just soldering.

    • @varnasfix
      @varnasfix  8 месяцев назад +1

      Thanks for your comment! You are absolutely right! Presenting fault finding and measurements would be more interesting and it is something i try to do in the newer videos...
      Camera setup did not help for that plus the "first repair" with the second repair were many months apart which made more difficult to diagnose in front of the camera.

  • @zibigulu2215
    @zibigulu2215 Год назад +2

    Good job, but you can't see much. Let me give you a hint that for video you need two light points on the left and right. The central light is reflected in objects and you can't see anything! Regards

    • @varnasfix
      @varnasfix  Год назад +1

      Thank you for your comment and input. That is so true... Will experiment with lights to get it better!

  • @shush_ya_mush
    @shush_ya_mush Месяц назад

    Great work and educational, you have a new subscriber

  • @tutifruti8452
    @tutifruti8452 Месяц назад +1

    Hallo können Sie mir bitte verraten welcher Starke hat SOT-23
    30V 5,3A
    oder andere werte hat er
    Dankeschön

    • @varnasfix
      @varnasfix  Месяц назад +1

      It is a N channel mosfet 20V 3.2A...
      You are welcome!

    • @tutifruti8452
      @tutifruti8452 Месяц назад

      VIELEN vielen Dank für
      Thank you so much

  • @dragger168
    @dragger168 11 месяцев назад

    I have a dead ctek with the resistor R26 burned too.
    So I plan to replace the resistor with a new 3.3ohm one per your video. But what caused it to get burned again? Is it the mosfet, the Schottky diode or both?
    Can you pls elaborate on where in the PCB is the mosfet that we need to replace? Thanks.

    • @varnasfix
      @varnasfix  11 месяцев назад

      Of course! :)
      The very first thing that caused the problem are the failed capacitors...
      Now the the mosfet is the sot-23 i replace at 12:50 in the video, taking down to 0.25 speed may help to take a better look.... (most of the video is out of focus a bit)
      If i remember the To-220 diode was ok after all but it is pretty easy to check with a multimeter.
      Hope that helps!

    • @dragger168
      @dragger168 11 месяцев назад

      @@varnasfix thank you so much!
      How do you know you need to replace the capacitors? Mine doesn’t seem bulged at all.

  • @playstation2bigs
    @playstation2bigs 5 месяцев назад

    Why that capacitors 1000uf 16 volts swollen ?

    • @varnasfix
      @varnasfix  5 месяцев назад

      The internal series resistance of the capacitor rises which heats up and boils the electrolyte inside the capacitor which in turn produces gases and internal pressure rises to the point that they blow their top in order to vent the gas.
      If you see the aluminum heatsink has a mark from their gases.
      Most of the capacitors have an indentation on top for that specific reason.
      It is a straight giveaway that the capacitor is damaged when you see the tops swollen like that.

  • @NaviPaslaugos
    @NaviPaslaugos 20 дней назад

    Hey, what could be wrong with MXS 7.0 when i get relay clicking sound, and charged stopped at second phase? Thanks

    • @varnasfix
      @varnasfix  20 дней назад +1

      Ctek MXS 7.0 is very different in design than MXS 5.0.
      You could always do a visual inspection of the capacitors inside if they are bulging of leaking and that would be a good indicator of the problem.
      Hope that helps.

  • @dragger168
    @dragger168 10 месяцев назад

    What is the other capacitor you replaced? Do you have a link to the other cap? Thank you

    • @varnasfix
      @varnasfix  10 месяцев назад

      The third capacitor is a low impedance 100uf 25V one...
      It was not broken really measuring about 88uf with good ESR.
      The Panasonic FR series (same model as the other 2 ones) is a good replacement.

  • @dziczekt
    @dziczekt Год назад

    what kind of replacement of NVR4501 can I use? its not available in my country :(

    • @varnasfix
      @varnasfix  Год назад

      It is a powerful N mosfet, VDSS 20V, VGS ±12V, ID 3.2A, Pd 1.25W. Any other with similar characteristics should be OK.

    • @varnasfix
      @varnasfix  Год назад

      here is a refined list if you can find any of those (but check pinout compatibility):
      eu.mouser.com/c/semiconductors/discrete-semiconductors/transistors/mosfet/?id%20-%20continuous%20drain%20current=3.2%20A~~8.6%20A&package%20%2F%20case=SOT-23~~SOT-23-3&pd%20-%20power%20dissipation=1.25%20W~~1.4%20W&transistor%20polarity=N-Channel&vds%20-%20drain-source%20breakdown%20voltage=20%20V%7C~20%20V%2C%2020%20V&vgs%20-%20gate-source%20voltage=-%2012%20V%2C%20%2B%2012%20V&rp=semiconductors%2Fdiscrete-semiconductors%2Ftransistors%2Fmosfet%7C~Package%20%2F%20Case%7C~Id%20-%20Continuous%20Drain%20Current%7C~Pd%20-%20Power%20Dissipation