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Hyundai L90D+ Inverter Transformer Resistance Discrepancy - Repair or Replace?

dorota_g 7995 12
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 6643410
    dorota_g
    Level 18  
    The measured winding resistance WN first trafo - 240 k.
    The measured winding resistance WN second trafo - 1200 R.
    I conclude that one thing is damaged. which? What is the correct order of resistance?
    Is there a sensible attempt to repair, scroll damaged transformer or rather look for something from disassembly?
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  • Helpful post
    #2 6643515
    satgal
    Level 40  
    It's easy to guess that about 1k is good, you will not pass it because you will not be able to break up without damaging the ferrite.
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  • #3 6644105
    WojtasJD
    Level 43  
    It can be broken without damaging the ferrite -> higher temperature and caution ... does not write about the transformer from this model, but in others I have not even managed to minimally chip the core.

    What to scroll to use secondary, however, first I would look good because it's a tiring robot :cry:
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  • #4 6645045
    dorota_g
    Level 18  
    Many thanks for the answers, this is important information for me. With this efficient search, it probably will not be easy, because the offer of shops is very poor and I have guessed that the trafo must be exactly the same.
  • #5 6645056
    WojtasJD
    Level 43  
    Upload _order_ photos of this track and PCB on both sides.
  • #6 6647359
    dorota_g
    Level 18  
    Inverter images, damaged, successfully desoldered

    Hyundai L90D + inverter front
    Hyundai L90D+ Inverter Transformer Resistance Discrepancy - Repair or Replace?

    Hyundai L90D + inverter back
    Hyundai L90D+ Inverter Transformer Resistance Discrepancy - Repair or Replace?

    Hyundai L90D + inverter trafo
    Hyundai L90D+ Inverter Transformer Resistance Discrepancy - Repair or Replace?
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  • #7 6650020
    Pol-UK
    Level 29  
    Beautifully nice, maybe I will have to send photo markings from the side, because they are important as well. greetings
  • #8 6650145
    dorota_g
    Level 18  
    The designation was aptly printed on a transparent film, which was placed on the site of the disassembled trafo during shooting, seen in the first picture.
    read:

    FDH1743-08A
    BA 05C 044
  • #9 6719711
    Andrzej1980
    Level 1  
    Hello, my Hyundai LD90D + monitor goes off after 2 seconds. after switching on and you can hear a hissing sound. I undressed him and I am not sure how to measure the trafo properly ?? Any tips ?? If, on the other hand, it will cause this, where can I get such a good buy? Thanks for the help
  • #10 6725525
    dorota_g
    Level 18  
    Some damage can be determined.
    1. Measurement on the primary side / winding wound with a thick wire /, the universal meter measures resistance, it should be in the order of 1 R.
    2. Resistance measurement of the secondary winding. In a good way it is about 1.2k.
    The given quantities apply to this specific trafo.
    A small resistance will indicate short circuit, a large gap - burned winding.
    These measurements may not indicate some inter-turn interferences.

    Unfortunately, I do not know where to buy such a trafo. I follow well-known auction websites.
  • #11 6727846
    dorota_g
    Level 18  
    Mateusz Satgal, as usual, was right: "you will not squeeze because you will not be able to break apart without damaging the ferrite".
    The core has actually disintegrated into several pieces.
    In addition, the winding wire is much thinner than the hair and covered with varnish - it can not be rewound.
    Experimentally: the WN section in the visible location of the damage has been cut, cleaned and soldered. The continuity of the HV surge was obtained. The core debris was dropped, the whole goes with self-adhesive foil.
    Trab returned to the plate.
    The result: the monitor starts - a nice picture for a fraction of a second.
    It rather confirms my diagnosis - a hit to exchange.
    If someone had such, or if you could replace a similar one, I am asking for information.
  • #12 6733028
    WojtasJD
    Level 43  
    To break the core into a few pieces you have to try, I was able to squeeze the speakers once and break in one place.
    Bonding two parts would still be over but a few ... - it's a lot of discontinuities, crevices.
    Here he should approach the transformer from the inverter in the full-bridge topology.
  • #13 6987267
    dorota_g
    Level 18  
    A hit that can not be won. I managed to buy a matching power supply board with the inverter, the monitor repaired, the topic closed.
    Thank you to everyone who would help me.

Topic summary

The discussion revolves around the resistance measurements of two transformers in a Hyundai L90D+ inverter, where one transformer shows a resistance of 240 kΩ and the other 1200 Ω. Participants suggest that the lower resistance indicates a potential short circuit or damage, while the higher resistance is within expected limits. Repair attempts are debated, with some indicating that disassembly could damage the ferrite core, making it difficult to rewind the transformer. The author shares images of the damaged inverter and transformer, and ultimately concludes that replacing the transformer is the most viable solution after unsuccessful repair attempts. Suggestions for sourcing a replacement transformer are also discussed.
Summary generated by the language model.
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