Author Topic: Need help identifying this component (pics)  (Read 812 times)

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Offline billbyrd1945

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Need help identifying this component (pics)
« on: December 07, 2018, 02:35:34 am »
I've been working on a wine cooler for a month or more. I suspect I have two bad transformers, but rookie enough to be unsure whether they actually are transformers. I'm posting a picture of one of the boards and its "transformer". I've Googled the number to death, but, can find no source for it. If I could, I would know for sure what they are and how to order them. I've checked them with meter out of circuit and found both coils to be open. Thanks for any help.
 

Offline xavier60

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Re: Need help identifying this component (pics)
« Reply #1 on: December 07, 2018, 02:54:03 am »
The component in the first photo is a common mode choke, often called "hash choke". They rarely fail. It has a simple construction of 2 equal windings.
That power supply has the same topology of early XT/AT PC power supplies. Start up relies on the half bridge power transistors self oscillating.
If one or both of the 150K start up bias resistors are open, the large HVDC  reservoir capacitors are likely to still be charged.
Take care to not touch anything until you have checked.
Hioki AS100D vom, HP 54645A dso, Fluke 87V dmm, AN8008 dmm, Agilent U8002A psu,  FY6600 function gen, New! Brymen BM857S-(With Battery)
 

Offline billbyrd1945

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Re: Need help identifying this component (pics)
« Reply #2 on: December 07, 2018, 03:43:24 am »
Thank you sir! Back to the drawing board.
 

Offline floobydust

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Re: Need help identifying this component (pics)
« Reply #3 on: December 07, 2018, 05:05:27 am »
I found a schematic for that FX-101 and FX-102A Wine Cooler control board.
 

Offline Armadillo

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Re: Need help identifying this component (pics)
« Reply #4 on: December 07, 2018, 08:22:35 am »
Looks like a pretty hard working C16.
 

Offline billbyrd1945

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Re: Need help identifying this component (pics)
« Reply #5 on: December 07, 2018, 05:10:57 pm »
"I found a schematic for that FX-101 and FX-102A Wine Cooler control board."
WOW! Thank you! Never expected this!
 

Offline floobydust

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Re: Need help identifying this component (pics)
« Reply #6 on: December 07, 2018, 07:05:39 pm »
Looks like a pretty hard working C16.
Yes the 12V filter capacitor works very hard and has a short life.

Some of these wine cooler controllers use a MCU while this one looks strictly analog.
Replacement boards are also cheap to buy on Ali or eBay.
These wine coolers just don't last, they run 24/7 and the Peltier cells can go bad too.
 

Offline Armadillo

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Re: Need help identifying this component (pics)
« Reply #7 on: December 07, 2018, 07:54:48 pm »
Agree, its alternating either between 85V or 160V depending on the supply voltage.
It should be a big polyyester capacitor for that purpose.

Looks like a pretty hard working C16.
Yes the 12V filter capacitor works very hard and has a short life.

Some of these wine cooler controllers use a MCU while this one looks strictly analog.
Replacement boards are also cheap to buy on Ali or eBay.
These wine coolers just don't last, they run 24/7 and the Peltier cells can go bad too.
 


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