Author Topic: Samsung TV LE37R87BD  (Read 896 times)

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Offline jtu

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Samsung TV LE37R87BD
« on: April 01, 2018, 09:23:27 am »
My mother in law bought new TV, old one was totally dead. I could not restrain myself from opening it up :D

No lights, not even power-on/stand-by, not responding to anything was meant by totally dead.

Opening it showed the obvious: caps. Several were bulged, couple were blown. I replaced the caps.

Now it shows some signs of life, but still not working condition. Power-on/stand-by seem to be functioning properly, there are sounds when menu buttons are touched. Screen does one white flicker very weakly couple seconds after power-on (see ~1:17 in the video).

Video in the gallery here.

Power rails seem ok. I checked if 24V rail going to CCFL does not go down when screen does it's single flicker. It does not alter.

Audio processor chip SGTV5810C feels quite hot. But I can still touch it for at least few seconds.

That's it for the first approach. I will think of the next step. If I'll wake up with an idea or google it or somebody suggests something. Or just move it to the dumpster. Not that I need another (old) TV screen.


 

Offline Rasz

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Re: Samsung TV LE37R87BD
« Reply #1 on: April 01, 2018, 02:59:03 pm »
ccfl and big gauges in the screen = dumpster

but the problem you describe sounds like ccfl inverter shutting off due to protections, might be one of transformers being shorted/open/lowered resistance, or lamp dead
Who logs in to gdm? Not I, said the duck.
My fireplace is on fire, but in all the wrong places.
 
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Offline jtu

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Re: Samsung TV LE37R87BD
« Reply #2 on: April 01, 2018, 05:06:05 pm »
Big gauges? Sorry, english dictionary did not help me :D If white spots on the screen are meant here, it’s just some dirt.

CCFL were my next guess also.
 
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Offline Rasz

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Re: Samsung TV LE37R87BD
« Reply #3 on: April 01, 2018, 07:26:04 pm »
that dirt totally looked like holes :o :)
Who logs in to gdm? Not I, said the duck.
My fireplace is on fire, but in all the wrong places.
 

Offline vinceroger

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Re: Samsung TV LE37R87BD
« Reply #4 on: April 02, 2018, 01:00:19 pm »
Hi im not sure if your a member on badcaps.net but if you are start a thread on there too and we can help you fault find etc
https://www.badcaps.net/forum/search.php?searchid=10236003
 

Offline coromonadalix

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Re: Samsung TV LE37R87BD
« Reply #5 on: April 04, 2018, 01:29:38 am »
your psu cap are buldged, some of them ae leaking too,  do an psu recap first, check for cold joints too in the psu,   is the tv worth repairing to you ???  you may undergo small or big problems if caps have failed ???
 
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Offline coromonadalix

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Re: Samsung TV LE37R87BD
« Reply #6 on: April 04, 2018, 01:32:18 am »
 
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Offline jtu

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Re: Samsung TV LE37R87BD
« Reply #7 on: April 05, 2018, 09:25:54 pm »
your psu cap are buldged, some of them ae leaking too,  do an psu recap first, check for cold joints too in the psu,   is the tv worth repairing to you ???  you may undergo small or big problems if caps have failed ???

Caps replacement was first thing I did. I wrote that in OP.
 

Offline jtu

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Re: Samsung TV LE37R87BD
« Reply #8 on: April 05, 2018, 09:28:11 pm »
find this :  https://www.manualslib.com/products/Samsung-Le37r87bd-438035.html

wow, this seem very good read for me!

PS Value for me lays not in the TV itself, but in the learning while fixing. Or destroying :D
 


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