UE40KU6072U power cycling

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ksb
Posts: 1
Joined: Sat Feb 16, 2019 1:09 am

UE40KU6072U power cycling

Post by ksb »

Hi!
When plugged in to power outlet and switched on, this tv power-cycles for random time even for 1h and after switches on and works for some time, after starts to power cycle again. In "good period" it can be unpowered and powered again, still works.
Power supply checked and caps are kinda ok (visual inspection and some of them was unsoldered to check capacity).
Motherboard BN94-11233M / BN41-02528A

Found that, putting some freezing gas on element marked "81244/608486" screen dims couple of times and then goes power cycling again.
20181226_233004b.jpg
Probably it is some kind of DC-DC converter with at least 2 channels (positive and negative), but I can't find what actually it is. Measuring just package (without pins), it measures 6x6mm. Also put couple of voltage measurements when it works.
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dlabi
Posts: 9
Joined: Sat Mar 25, 2017 10:31 pm

Re: UE40KU6072U power cycling

Post by dlabi »

It's DC/DC CONVERTER BM81244 as you can check in here https://www.electronica-pt.com/esquema/ ... no_html,1/

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