Generic Inverter Question

[scooby-doo]

Hi Peeps

This is just a generic Inverter question...over the past couple of weeks I have been having quite a few inverter transformer faults...the question is, Is there a secret supplier of these transformers or do you just buy the complete inverter

I have been ok upto now and used old transformers from other boards but I have a Sharp 32" Aquos...(model number ripped off) that has a transformers gone..PSU/Inverter=RUNTKA396WJN1...and Im struggling to find one
It also hurts to think if I did manage to find a PSU for £50ish then in theory I would be paying the £50 for 1 transformer.

Thanks for any help as always

[sparky]

hi
have a scrap sharp inverter been using transformers might have
one available will have a look monday
dave

[ProDave]

Has anyone tried a "universal inverter" like this one http://www.ebay.co.uk/itm/Universal-Six-Output-LCD-Panel-Backlight-Inverter-/160689447495?pt=UK_AudioTVElectronics_Video_Televisions&hash=item2569d66247

They are available for different numbers of outputs and very cheap.

Now obviously fitting one of these makes the set non standard and you have a little work to do, to interface the enable and brightness controls for example.

But is this perhaps a way of fixing sets that are otherwise BER?

[scooby-doo]

Cheers Dave(Sparky) that would be great if you have an old one out of a snotter. Give us a shout

Bloody Hell ProDave..great idea but I have got more chance of shitting strawberries then getting one of them to work...I wouldnt dare plug the thing in....Im still on the learning line...not even close to the curve yet.

With the learning line/curve in mind...next question

I had an inverter with the 8 tranny's on 7 secondary's were reading 1.1k ohms and one was reading 1.8k ohms changed it to one that was 1.1k ohms and the set worked...errmmmmm silly question to those that know but Why would the resistance increase????

[sparky]

hi
have got one how about £10 inc post and package
if ok were to send to
dave

[scooby-doo]

Cheers Dave..will private message you later on today with details

[jacqffio]

Hi Scooby.
I use www.lcdparts.net.
They are american but usually get my order within a week.
If you check out the site they even give you the correct readings for the transformers and which pins are primary and secondary.
Ohm also sell single transformers.
Cheers
John.

[scooby-doo]

Cheers John

Im liking the site...love the way it tells you the readings and pins you should be reading from.

Thanks for that much appreciated

[Ohm Supplies]

We've been selling single transformers for some boards for around 4 years now with very few problems apart from were to source them from,  As they're sm (normally) but quite large and in most cases easy to fault find as they;re often next to at least another 7 tx's that read well its a good repair to do.

regards
Andy

[scooby-doo]

Cool thanks Andy. I do like doing the inverter faults...Could I ask about tolerance on the transformers

I have a TV at the minute and usual, cuts out after a couple of seconds...the site lcdparts.net says the secondary readings should be 980ohms...I am getting around the 1.1k ohms mark with 1.107k being the lowest and 1.196k being the highest....all six are quite consistant but way out of what they should apparantly be...surely all six wouldnt fail at the same time

[Ohm Supplies]

Its quite rare for several transformers to read exactly the same, its more likely that someone has read one and put what they've measured once (it technically should be listed in Henrys) they will measure differently if you're reading on the board or off and were on the board they are

regards
ANdy

[scooby-doo]

Cheers Andy...Could you tell us what sort of tolerance have I got to play with on inverter transformers...

And Could I also ask if its good practice to earth out the inverter ic timer/protection pin to see which Trannys get hot/hottest first to help confirm failure

[Turnip]

Hi Andy,

Confess most duff trannies check O/C on secondaries - what's that 'Henry' biz bit, really curious- Chris