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HAVE A 3E369D THAT KEEPS BURNING UP POWER TRANSFORMERS. ANY IDEAS ON WHICH COMPONENT IS A MOST LIKELY SUSPECT OR HAVE YOU SEEN THIS NUMEROUS TIMES?

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Thermostat oreslse it is internal. good luck. are you putting in transformer with the right vac rating. most transformers for heating systems need a 40va rating

Posted on Nov 26, 2008

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My 24v transformer keeps burning up in both heat and cool modes. What are the common components that use 24v and how would I check them to see if they are drawing too much current?


Check out the compactor relay - it operates in both heat and AC modes. Use an ammeter to measure current drain - check this against what it is supposed to be using - for that info check with the manufacturer. Or just try another compactor. Also check components in Air handler.

U might also want to check the wiring schematic to see what other devices are powered by the transformer. Any one of them could be the culprit. Any relay stuck in a closed position will place a load on the transformer.

Nov 01, 2015 | Heating & Cooling

4 Answers

Sony KV-32FS12 32" TV


This condition be directed us toward pin modulator transistor Q504 which may shorted. Parts necessary to fix this unit may be D501, D504 and Q504.
Check this site if you need the schematic diagram: //http://www.eserviceinfo.com/downloadsm/19977/SONY_KV32FS16.html
Good Luck.

Jan 28, 2008 | Sony FD Trinitron WEGA KV-32FS120 32" TV

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I have this lg 42lc7d that keeps burning the transformer. I have put n two supply board n each time I plug in the transformer smoke n burn lead wire that goes to transformer.


Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Oct 24, 2015 | LG Televison & Video

1 Answer

Samsung LN55B640 LCD TV blowing fuses


when the fuse always blown, it could be a shorted component at the power supply board or the main board was affected during lightning where in some of the component get burned then cause a shorted line.if you don't have an idea in any electronic repair just leave it to the trained technician to do the works. hope this can help you thanks for using the fixya.

Jul 18, 2012 | Samsung LN55B640 LCD TV

1 Answer

TURNS ON AND OFF IMMEDIATELY . HEARD POPPING AND SMELLED ELECTRICAL BURN BEFORE 1ST TIME


More than likely a burned power supply. The acrid smell is a giveaway for high powered components failing. If it were a conventional CRT type screen, I would suspect the flyback transformer, but LED/LCD type screens will eat a power supply if it has the slightest defect in manufacturing.

Jan 26, 2010 | Sanyo DS32920 32" TV

2 Answers

Have the KLH ASW10-120 Powered Subwoofer and it is blowing fuses


If it stays on for 3 seconds then it probally is not the transformer. However it may very well be the power amp no way to tell untill we operate. Call Pro Line Music 215-736-8055

Dec 11, 2009 | KLH ASW10-120 Subwoofer

2 Answers

My low voltage landscape lights are constantly going on and off once the timer activates them initially. I suspect there is a short somewhere, but is there a good way to locate the short besides pulling up...


Your transformer must have output greater of the total wattage required of the entire system. Example: Putting lights that draw a total of 250 watts with only a 180 watt transformer will result some lights not working, or dimming and flickering, or intermittent power outtages. I learned this from experience. Always go with a transformer that has more wattage available than what is needed. Also, using the incorrect gauge of wire can cause the same issue. Wire creates resistance. Distance the power must travel through the wire creates more resistance at the end of your run than the beginning.

Mar 29, 2009 | Garden

2 Answers

Audio switches off after time.


You can get a spray designed for electrical servicing that will freeze a hot running component from electrical service suppliers.

Jan 25, 2009 | JVC TH-M303 System

1 Answer

POWER TRANSFORMER KEEPS GOING OUT


you obviously have an intermittent low voltage short. I would visually inspect all low voltage wiring to try to locate the problem. Pay good attention to the limit circuit, I have seen wires melted to the inducer housing before causing this problem. also, install a 3A fuse inline till you find the problem to save on transformers.

Nov 25, 2008 | Dayton Heating & Cooling

2 Answers

Microwave


Magnatron is suspect. Need to put a voltmeter on the input (primary) side to the high-voltage transformer (big heavy iron thing in there) Should be getting 120Vac when it goes to cook cycle. Don't touch the other (high voltage) side of this transformer. If the power is there, you are looking at replacing the magnatron. Its affordable if you do it yourself - buy the part on EBAY - lookup "universal magnatron"

Jan 02, 2008 | Microwave Ovens

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