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Old 01-07-2019, 02:55 AM   #1
Dannyx
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Red face What is THIS part on laptop inverters ?

Good day folks. Quick question here: despite having worked on (many ?) laptops so far and changed (plenty ?) of inverters for models with CCFL displays, I must admit I don't know what this thing is. Shame on me This ferrite part on the inverter with a wire soldered to it...what is that ? Some sort of ballast ? There's one on either side from what I recall, but I was being a dipsh!t and didn't picture the whole inverter for some reason...
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Old 01-07-2019, 10:47 AM   #2
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Default Re: What is THIS part on laptop inverters ?

Can we see the whole board?
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Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

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Old 01-07-2019, 10:49 AM   #3
Dannyx
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Default Re: What is THIS part on laptop inverters ?

Wish I could, but like I said: didn't picture the whole thing....if I get my hands on it again, I shall, since this is a very old photo I took more than a year ago but never got around to asking about it...
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Old 01-07-2019, 09:02 PM   #4
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Default Re: What is THIS part on laptop inverters ?

Looks like its just used as some sort of output filter, like a ferrite bead. basically a capacitor on the output made out of ferrite
number D7312-B001-S3-1

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Old 01-07-2019, 09:48 PM   #5
stj
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Default Re: What is THIS part on laptop inverters ?

i think it's some type of high current capacitor to block dc.
reason i say that is because all the invertors i'v worked on decouple the tube from the transformer with a ceramic cap.
and i dont see one there!

or it could be a peizo-electric transformer.
i'v heard about them, but never seen one.

Last edited by stj; 01-07-2019 at 09:49 PM..
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Old 01-08-2019, 03:12 PM   #6
eccerr0r
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Default Re: What is THIS part on laptop inverters ?

I think stj got it, piezoelectric transformer.
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Old 01-08-2019, 06:50 PM   #7
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Default Re: What is THIS part on laptop inverters ?

See attachment.
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