cheebster
Badcaps Veteran
Last Activity: 07-21-2025, 09:34 AM
Joined: 05-29-2008
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VDRV to tcon, 13V to main only -
Yep!Leave a comment:
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I replaced it finally the GP47S60YERD with IKW50N60DTPXKSA1 which works fine. PSU outputs all his voltages fine. However, tv still flashes red and wont fire up. Guess the panel is bad on this one.. 2 flashes....Leave a comment:
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Here is the back side.....
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From here; https://www.reddit.com/r/S95B/commen...ites_the_dust/ it seems these are a common failure. Defective psu is BN44-01264A and new psu design is BN44-01329A but hard to find....Leave a comment:
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That's fine. I need to find what's wrong with these, still....Leave a comment:
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Ok ! Got my replacement ebay psu. Came in with a blown fuse and same short at the same location. I guess i will need to find the culprit. Digikey found me a replacement for the ic, a IGP20N60H3XKSA1 (smaller format but should have worked) and when plugging in, a hole blew in the psu in one of the traces. I need to troubleshoot this one better, it seems. If anyone can shine some light on where to start.. ThanksLeave a comment:
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I will have a replacement power supply tomorrow, so i'll see from there. Thanks...Leave a comment:
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With this IGBT removed, psu powers on and clicks, and produces output voltage. Safe to test on tv without it ? IDK. Will wait for the digikey part, i guess....Leave a comment:
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The ac input fuse is a T12AH250v 12a fuse....Leave a comment:
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I found a short on part GP47S60YERD which is a huge IGBT on the right large heatsink, shorted. Ordered from digikey, hope it fixes.. Can i test the psu without it ?...Leave a comment:
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Samsung OLED QN77S90 Bad Power Supply
Hello, picked up this tv a nice Oled QN77S90. However, it's blowing fuses like crazy (got the whole room lights go out the first time). So i digged and it seems this tv has the BN44-01264A PSU that often fails. However, replacements are costly (samsung replaces it for the BN44-01329A revised psu).
I'd like to troubleshoot that one. Here is a picture of it, but honestly i don't know where to start. It blows a 12A fuse in a split second, it's really a hard short on this one. Thanks for any guidance ! ...
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