Help - how to test an inverter transformer

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  • matthmal
    replied
    Re: Help - how to test an inverter transformer

    thanks for the help guys !

    Leave a comment:


  • budm
    replied
    Re: Help - how to test an inverter transformer

    Originally posted by matthmal
    I do not have a transformer to replace, i am just trying to understand how to know which transformer to use as a replacement if you have a faulty one.
    Unless you know the details of the original transformer spec.
    https://cdn.badcaps-static.com/pdfs/...7742ac8767.pdf

    It is very complicate. You just do not put one transformer in place of the other unless you know what the exact requirement of the circuits, the transformer, the loads. etc.

    Leave a comment:


  • SteveNielsen
    replied
    Re: Help - how to test an inverter transformer

    You replace with a transformer of the same part number and/or specification just like any component. It depends on the one used and they are not all the same, therefor not interchangeable.
    Last edited by SteveNielsen; 10-06-2015, 09:31 AM.

    Leave a comment:


  • matthmal
    replied
    Re: Help - how to test an inverter transformer

    Originally posted by budm
    But we do not know what the CURRENT TRANSFORMER YOU HAVE, so far you show us the pictures of the transformer from EBAY and from Yong and no pictures of your transformer or the make and the model of what you are working on, how can we when you are not provide good clear information that I already asked for (post 20)?
    And your reply is "I am currently reading the ebook of Jestine Yong - LCD Monitor Repair and that is from where I have brought that screenshot. I am trying to learn more about electronics and lcd repairs."
    I do not have a transformer to replace, i am just trying to understand how to know which transformer to use as a replacement if you have a faulty one.

    Leave a comment:


  • budm
    replied
    Re: Help - how to test an inverter transformer

    Originally posted by matthmal
    Can you please let me help me understand how can I know which is the right transformer to be used as replacement of the current transformer?
    But we do not know what the CURRENT TRANSFORMER YOU HAVE, so far you show us the pictures of the transformer from EBAY and from Yong and no pictures of your transformer or the make and the model of what you are working on, how can we when you are not provide good clear information that I already asked for (post 20)?
    And your reply is "I am currently reading the ebook of Jestine Yong - LCD Monitor Repair and that is from where I have brought that screenshot. I am trying to learn more about electronics and lcd repairs."
    Last edited by budm; 10-06-2015, 08:51 AM.

    Leave a comment:


  • matthmal
    replied
    Re: Help - how to test an inverter transformer

    Originally posted by budm
    How about the pictures of the top side of the board? and also the whole board both sides.
    What is the make and model of this product you are working on? The more information we get the more we can help.
    It looks to be correct as you have marked for the High Voltage secondary winding.
    Can you please let me help me understand how can I know which is the right transformer to be used as replacement of the current transformer?

    Leave a comment:


  • Ramee
    replied
    Re: Help - how to test an inverter transformer

    Jestine Yong

    Leave a comment:


  • matthmal
    replied
    Re: Help - how to test an inverter transformer

    Originally posted by budm
    How about the pictures of the top side of the board? and also the whole board both sides.
    What is the make and model of this product you are working on? The more information we get the more we can help.
    It looks to be correct as you have marked for the High Voltage secondary winding.
    I am currently reading the ebook of Jestine Yong - LCD Monitor Repair and that is from where I have brought that screenshot. I am trying to learn more about electronics and lcd repairs.

    Leave a comment:


  • budm
    replied
    Re: Help - how to test an inverter transformer

    How about the pictures of the top side of the board? and also the whole board both sides.
    What is the make and model of this product you are working on? The more information we get the more we can help.
    It looks to be correct as you have marked for the High Voltage secondary winding.
    Last edited by budm; 10-05-2015, 02:34 PM.

    Leave a comment:


  • matthmal
    replied
    Re: Help - how to test an inverter transformer

    Originally posted by stj
    check both.

    the primary is the one the power goes into and usually looks smaller if you can see it.
    the secondary is the output to the tube(s)

    most problems are on the secondary side,
    but it's worth checking there is no conection between the primary and secondary.
    Hi,

    Thanks for your reply. I came through the attached... is that the way that the windings need to be checked?


    Thanks,
    Matt
    Attached Files

    Leave a comment:


  • budm
    replied
    Re: Help - how to test an inverter transformer

    Originally posted by matthmal
    Hi,

    Thanks for your reply. I can't seem to find the transformers that I want on that website though. Can I do something else please?

    Thanks,
    Matt
    But so far you have not given us any information or the pictures of the transformer you are trying get or test. You gave the link in post 4 for the Flyback transformer for the CRT.
    Last edited by budm; 10-05-2015, 02:31 PM.

    Leave a comment:


  • matthmal
    replied
    Re: Help - how to test an inverter transformer

    Originally posted by budm
    Go here and look at the transformers to see what typical windings for the inverter transformers are (the secondary side high Voltage )winding will use very small wires compared to the primary winding).
    http://lcdparts.net/T.aspx
    Click on the 'BUY NOW' button to see the spec and the pinouts.
    For example:
    http://lcdparts.net/TransformerDetai...ProductID=2727
    Hi,

    Thanks for your reply. I can't seem to find the transformers that I want on that website though. Can I do something else please?

    Thanks,
    Matt

    Leave a comment:


  • budm
    replied
    Re: Help - how to test an inverter transformer

    I only use LCDPARTS.NET for ref info only (I used to buy from them because they are close by in S.F), their prices are way too high.

    Leave a comment:


  • fzabkar
    replied
    Re: Help - how to test an inverter transformer

    Originally posted by budm
    Go here and look at the transformers to see what typical windings for the inverter transformers are (the secondary side high Voltage )winding will use very small wires compared to the primary winding).
    http://lcdparts.net/T.aspx
    Click on the 'BUY NOW' button to see the spec and the pinouts.
    For example:
    http://lcdparts.net/TransformerDetai...ProductID=2727
    Thanks for the information.

    I notice that LCDparts want $22 for the transformer alone, whereas shopjimmy are selling an entire 4H.V0708.321 inverter (which uses 6 of those transformers) for $10.

    http://www.shopjimmy.com/auo-19-2600...t-inverter.htm

    Leave a comment:


  • budm
    replied
    Re: Help - how to test an inverter transformer

    Go here and look at the transformers to see what typical windings for the inverter transformers are (the secondary side high Voltage )winding will use very small wires compared to the primary winding).
    http://lcdparts.net/T.aspx
    Click on the 'BUY NOW' button to see the spec and the pinouts.
    For example:
    http://lcdparts.net/TransformerDetai...ProductID=2727

    Leave a comment:


  • stj
    replied
    Re: Help - how to test an inverter transformer

    check both.

    the primary is the one the power goes into and usually looks smaller if you can see it.
    the secondary is the output to the tube(s)

    most problems are on the secondary side,
    but it's worth checking there is no conection between the primary and secondary.

    Leave a comment:


  • matthmal
    replied
    Re: Help - how to test an inverter transformer

    Originally posted by stj
    each tool has it's own purpose.

    the blue ringer is just for testing coils / transformers.

    an LC(R??) meter is also for checking capacitors - it also gives real numbers instead of just a bar of leds.

    you get what you pay for.
    May i know which is the secondary and primary windings of an inverter transformer pls? Which is the winding that I am supposed to check?

    Leave a comment:


  • stj
    replied
    Re: Help - how to test an inverter transformer

    each tool has it's own purpose.

    the blue ringer is just for testing coils / transformers.

    an LC(R??) meter is also for checking capacitors - it also gives real numbers instead of just a bar of leds.

    you get what you pay for.

    Leave a comment:


  • matthmal
    replied
    Re: Help - how to test an inverter transformer

    Originally posted by budm
    I never use one of those, I use my SENCORE LC75.
    http://www.ebay.co.uk/itm/Sencore-LC...item2358eeb120
    That is surely much better but even more expensive. So the one that i quoted isn't good?

    Leave a comment:


  • budm
    replied
    Re: Help - how to test an inverter transformer

    I never use one of those, I use my SENCORE LC75.
    http://www.ebay.co.uk/itm/Sencore-LC...item2358eeb120

    Leave a comment:

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