Question about Ademco 1324 12VAC 40VA Transformer

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I shorted out my Ademco 1324 12VAC 40VA Transformer, no power coming from unit. Can I repair/replace the enclosed fuse or do I have to by a new one?

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You'll have to buy a new one, they are sealed

Posted on Jan 06, 2014

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Posted on Jan 02, 2017

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R-9H84B. It just stopped working.Went to use it and nothing , thought it was unplugged. Repair man replaced the 20 amp fuse and it immediately blew. He said it was the transformer.Is it transformer?


It could be the transformer. Is it generating any smoke? They usually burn up because of shorted windings.

If the fuse blew, however, when the door was opened or closed, then you have a bad door switch.

If the unit heats, and the fuse blew after a few minutes, then you could have a weak fuse holder.

Jan 12, 2017 | Microwave Ovens

Tip

How to repair a dead microwave.


Your unit is dead, mains are good, tried power plug in other receptacles, still no power. You more than likely have a bad fuse inside the unit.

Unplug the unit. Remove the cover. Generally this requires removing all the screws on the back perimeter and lifting the cover up or perhaps sliding it off the front. Sometimes the cover will stick due to old grease, etc.

Somewhere in the area of where the power cord comes in, or near the transformer there should be a small fuse in a holder. It is not a glass fuse and should be replaced with the same kind which is a ceramic, and the same value which is in amps. This is important for future protection.

You can get the fuse at http://www.mcmelectronics.com/ or http://www.repairclinic.com . Get a box of five for future problems. If this was the only problem your microwave should work.

If the new fuse blows you could have a shorted power transformer, bad high voltage diode, or a bad magnatron in that order. There could also be a short in the board with the display but that would be unusual.

Check out my tip at http://www.fixya.com/support/r4223574-microwave_oven_will_not_heat for more help.

hardrocko

Thanks for using FixYa

on Feb 26, 2010 | Microwave Ovens

Tip

How to fix a dead microwave.


Your unit is dead, mains are good, tried power plug in other receptacles, still no power. You have a bad fuse inside the unit. Unplug the unit. Remove the cover. Generally this requires removing all the screws on the back perimeter and lifting the cover up. Sometimes they stick due to old grease, etc. Somewhere in the area of where the power cord comes in, or near the transformer there should be a small fuse in a holder. It is not a glass fuse and should be replaced with the same kind (ceramic) and value. This is important for future protection. You can get the fuse at www.mcmelectronics.com . Get a box of five for future problems. If this was the only problem your microwave should work. If it blows the new fuse you could have a shorted power transformer, bad high voltage diode, or a bad magnatron in that order. There could also be a short in the board with the display but that would be unusual.
hardrocko

Thanks for using FixYa

on Feb 26, 2010 | Computers & Internet

1 Answer

I have a blodgett zephaire gl oven. unit kept buring up 24v transformer, was old bad centrifical switch in motor. I replaced motor with brand new one, unit still buring up 24v transformer.....why ?


A short somewhere causing it to overamp. Put a 3amp inline fuse on the secondary side (24v side) on the hot wire. This will save the transformer and blow the fuse not the transformer. The centrifugal switch prolly wasn't bad. So I would trace the wire coming off transformer and look for bare wire or loose wires. Anything that would cause a short

May 04, 2016 | Blodgett Ovens

1 Answer

Our Transformer became very hot a couple of days ago and eventually turned darker brown across the mid-section of the transformer within an hour. We disconnected the unit and want to know if this is...


ours did the same thing with the darker area in the middle of the front of it. My andyman tested the battery and wire and all is fine so ordering a new transformer.

Jun 02, 2011 | Philips Pittway Transformer 120v 60hz 45a...

1 Answer

I have a 6 year old Carrier Unit and Thermostat that was new with the house. Last night the A/C jsut turned off. I looked at the Thermostat and it was blank, no power. i thought it was the fuse. It was NOT...


if the thermostat is blank is very likely that the 24 volt transformer shorted. depending on the unit it might be equipped with a fuse similar to the ones found on vehicles if not transformer will need to get replaced this is located inside the air handling unit. the source of the short might be outside next to the compressor.. if the control wires(small wires going into compresor) are exposed it is possible that a pet move them, someone cut them with a grass trimer raypena_0.jpgrain or sprinklers cause them to short ( if exposed) first fix the wires them replace the fuse all should be fine.

May 29, 2011 | Heating & Cooling

1 Answer

My model AZ22E15 zoneline not turning on


those are the specs. It is possible that the transformer is out.

Oct 27, 2009 | GE Zoneline AZ22E15E Air Conditioner

1 Answer

Blows main fuse when power is turned on


Shorted power supply/module is most likely problem.

May 27, 2009 | Sony STR-DE635 Receiver

1 Answer

Bose SA-3 Amp / Blown Fuse


The problem is not the transformer. You now have shorted output transistors at the very least. By corssing the wires you presented a zero(0) ohm impedence load to the output section. It quickly went into overload. Before the fuses had a chance to open up, the outputs fried. This unit will require new output transistors and perhaps the previous driver circuit will require parts as well. Figure on $20-$50 in parts plus hte local labor rate for the repair.

Dan

Sep 25, 2008 | Bose Lifestyle SA-3 2-Channel Amplifier

1 Answer

INFINITY BASSLINK X BLOWS FUSES


What probably happened was both of the final audio output transistors shorted. This caused a higher than normal drain on the switching transistors on the primary side of the torrid power transformer causing one to short and then blowing the fuse. I replaced both switching transistors and ramped up the current to about 5 amps. I could see the power supply was not working but there was still a short. I traced the short to both audio output transistors. Replaced them and unit is like new. After I found a service manual on this item it was a breeze to find the problem.

Sep 19, 2008 | Infinity BASSLINK Car Subwoofer

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