Comments on: Two In One High Voltage Transformer

By: Jestine Yong

Jestine Yong — Thu, 09 Feb 2017 10:03:24 +0000

In reply to med.

Hi Med,

If the power supply is working fine and only have sound you can dip the transformer into shellac for 10 minutes and let it dry for one day. After that fix it and try again and hope the noise will be gone.

Jestine

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By: med

med — Wed, 08 Feb 2017 06:35:29 +0000

Hi i have a power board with one transformer like the picture above the problem is its too noisy is there anyway i cam make it quiet Please ??

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By: admin

admin — Mon, 20 Feb 2012 01:38:25 +0000

Hi Keon,

I guess you are referring to the smps transformer. This transformer is unique and hardly could get from the market unless if you have a way to locate the manufactuer or the authorized service center.

Jestine

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By: Keon

Keon — Sun, 19 Feb 2012 14:08:42 +0000

Hi I also have a Hanns-G HW173D 17″ widescreen monitor. I replace the capcaitors and it worked fine...for 30 minutes or so then the transformer blew out. the yellow one near to 400v capacitor. If anyone can inform me of the name and type of the transformer I could get one with a slightly higher power rating to compensate for the capacitors. Much thanks.

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By: admin

admin — Tue, 17 May 2011 00:57:42 +0000

HI Ai,

It depends on model usually from 500vac to 1000vac.

Jestine

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By: Al Ow

Al Ow — Mon, 16 May 2011 23:47:22 +0000

What is the amount of avarage high votlatge for the back light of a LCD monitor?

Best regards

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By: Edward Warbucker

Edward Warbucker — Tue, 01 Sep 2009 03:12:17 +0000

Thanks for the tips. I can see still see the display if the room light is good enough. I can see it quite clearly if I shine a flashlight on the screen, so I think it's just the backlight and not the display. The pins on the high-voltage side of the high-voltage transformer are covered in a foam-glue type stuff, I presume for insulation. The small pins on the other side of the transformer appear to be fine. Also, I don't know if it matters, but the backlight will turn on again if I change display modes (like to a different resolution.) In this case it acts just like it does when I first turn the monitor on, going out again after a second or two.

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By: admin

admin — Mon, 31 Aug 2009 08:48:06 +0000

hi Edward,

It it shutdown after few seconds then suspect either bad backlight, bad inverter board or even bad main board. After shutdown did you manage to see the dim display?

If totally dark then make sure the supply voltage to inverter IC still present otherwise suspect a bad Mainboard. If there is supply voltage then check on the back light and components in the inverter board. Sometimes tiny dry joints can be found around the high voltage transformer pin.

Jestine

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By: Edward Warbucker

Edward Warbucker — Sun, 30 Aug 2009 00:37:15 +0000

I have a Hanns-G HW173D 17" widescreen LCD monitor I am trying to repair. At first it would not recognize a signal from the VGA cable at all (I do not have access right now to a working card with a DVI port to try that input). I found this guide, http://www.ccl-la.com/LCDrepair7.htm , checked out the capacitors mentioned and found them to be bulging, so I replaced them. Now it recognizes the signal fine but the backlight only stays on for about 2 seconds after you turn on the monitor. When the backlight is on everything appears fine--no flickering and the picture looks great. But then it shuts off. I have gone into the on-screen setup menu and made sure that the backlight is turned up. Any ideas?

I'm not sure if this is the place to post this, but I couldn't find a direct contact listed on the site.

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