CCFL TRANSFORMER - Page 1
Forum section: electronics / repair

author: lionelkjh
author_rank: Frequent Contributor
timestamp: October 04, 2018, 11:21:36 am
content: Hello everyone! I am looking for a ccfl transformer for a flat computer screen. I made the photos as attachments. Is there an equivalence, because I did not find anything on the internet? Thanks for your help!

author: wraper
author_rank: Unknown
timestamp: October 04, 2018, 11:35:00 am
content: You could try TMS91429CT,https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=TMS91429CT&_sacat=0As much as I googled, TMS93540CT has around 1.25k secondary winding resistance and TMS91429CT is very close in this regard. What is monitor model and PCB part number BTW?

author: lionelkjh
author_rank: Frequent Contributor
timestamp: October 04, 2018, 02:37:07 pm
content: the flat screen is a HYUNDAI W220D; the resistance on a secondary is 1280 ohms; the other is cut (infinite resistance)

author: wraper
author_rank: Unknown
timestamp: October 04, 2018, 02:40:58 pm
content: Not much info about the monitor either. I think transformer which I suggested should work just fine. Not that you will loose much money even if it doesn't anyway.

author: lionelkjh
author_rank: Frequent Contributor
timestamp: October 04, 2018, 03:16:09 pm
content: a picture of my monitor....

author: james_s
author_rank: Super Contributor
timestamp: October 04, 2018, 03:43:29 pm
content: You should be able to substitute something close and it will work fine. You might also be able to find the break in the primary or rewind it, usually the primary winding is not many turns.

author: wraper
author_rank: Unknown
timestamp: October 04, 2018, 03:45:45 pm
content: Quote from: james_s on October 04, 2018, 03:43:29 pmHe has one of the secondary windings failed. Never seen faulty primary winding.

author: james_s
author_rank: Super Contributor
timestamp: October 04, 2018, 08:24:10 pm
content: Quote from: wraper on October 04, 2018, 03:45:45 pmThat may be, but it's not what he said. A few posts up it says secondary 1.2k, primary open. 1.2k does sound rather high, but then these do use hair thin wire

author: wraper
author_rank: Unknown
timestamp: October 04, 2018, 08:32:39 pm
content: Quote from: james_s on October 04, 2018, 08:24:10 pmIt has 2 secondary windings, one of them if broken.

author: james_s
author_rank: Super Contributor
timestamp: October 04, 2018, 08:39:37 pm
content: Ah ok got it. Yeah try a similar transformer, it will probably work fine.

author: lionelkjh
author_rank: Frequent Contributor
timestamp: October 06, 2018, 08:20:48 am
content: Hello; here is the photo of the power board on which is the ccfl transformer.

author: lionelkjh
author_rank: Frequent Contributor
timestamp: November 06, 2018, 07:26:46 am
content: Hello everyone! I received the transformer TMS91429CT ordered on aliexpress ordered the previous month (long waiting time), the screen worked 15 minutes and it does not start anymore. After a redemontage, the transformer is defective to my surprise! A priming is created in the winding (without the neons ccfl), which does not start the screen. Resistances measured at the primary: 1.36kohms and more than 1megohms on the other !! Is it a fault related to the internal isolation of the transformer itself, or that the transformer is not original (because the original is not found?) ?? Thanks for your help!

author: wraper
author_rank: Unknown
timestamp: November 06, 2018, 10:58:35 am
content: Probably you just received a used transformer which was close to it's death.

author: lionelkjh
author_rank: Frequent Contributor
timestamp: November 06, 2018, 11:26:12 am
content: use? it was new and no traces of welds on the legs. I think rather a design flaw in manufacturing .....

author: wraper
author_rank: Unknown
timestamp: November 06, 2018, 11:28:22 am
content: Quote from: lionelkjh on November 06, 2018, 11:26:12 amMost of transformers on ebay are salvaged from faulty monitors, not new.

author: coromonadalix
author_rank: Super Contributor
timestamp: November 06, 2018, 11:30:40 am
content: Maybe you got one not configured for your monitor ?? you can use the same core for many models but the winding is different, or you have other problems on the pcb ?Samsung did used your pcb gip2204ma in one monitor model, but i cant see the numbers on it, its only a picture of someone changing the capacitors.

author: lionelkjh
author_rank: Frequent Contributor
timestamp: November 06, 2018, 03:01:45 pm
content: model of the map: GIP2204MA REV2.0