This set has power supply board BN44-00776A. i'am having a hard time finding one that's under a 100. Most voltages are about right with Back Lights unplugged and I have a standby light. If I plug the back lights up the voltages are cut in half and some no voltages and also loose stand by light. Back lights do not light up unless i use a back light tester, i can't really see how many lights are lighting using all four pins i can light up LED'S.Do you all think the power board is bad? Thanks for letting me in and for any reply's i get.
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Samsung UN65H6203BF
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Re: Samsung UN65H6203BF
[/ATTACH]After taking the whole power supply out of the set and further testing i do have 325 dv volts on the back light light connector. each grey wire as red and using the black pins both sides have this same voltage. Looks like i may have ordered a board i don't need?? thanks
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Re: Samsung UN65H6203BF
Hi cow boy, post a brightest possible photo of the back, straight, not by side. PSB must be output loaded to test it well, a good board doesn't behave like your with fault at the load, so no way the board can be ok, instead a purchase of a too expensive board after 2 mins of opening the thread is not the smartest move i have seen.. Your board problem is 95% prob. in feedback section, only two parts are affected, one the optocoupler, the other & more critical the shunt reference reg.
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Re: Samsung UN65H6203BF
What happens to the led strings with the backlights connected and disconnected? Does the DC a voltage ramp up fast at all, or just plain no voltage on the backlights? Do the backlights come on at all (maybe even for a second?) When the TV is on, does the PFC work? If the PFC works you should get instead of 170Vdc something like 390Vdc.
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Re: Samsung UN65H6203BF
Iam sorry if i have offended anyone on here, i did order a board before i knew it was bad. I haven't worked on any electronics in 20 years, however it was 3/4 hours it looks like, i thought the post was up a day or two. I was anxiousness to fix the set for my wife. she loves tv and i picked tv up for 30 bucks.The board i'am getting is not the original. i only found this out after i ordered and paid for it. what a bummer, i didn't know there was a sub for this board. i will share it with you all monday. i love to work on stuff and i have sets to repair that is mine. i did ruin a tcl 55 inch trying to put in back lights. instructions were not that good. i got air bubbles in screen. i will be posting and donating in the future. Thanks
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Re: Samsung UN65H6203BF
you did nothing wrong otis, some people around here are just crude and rude and they try to blame it on a language barrier when it's just bad manners, as witnessed by everyone here, no need to spell out the offenders name is there.Last edited by nomoresonys; 01-29-2023, 03:49 PM.
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Re: Samsung UN65H6203BF
I don't know. I told them I was hesitant about the board being a sub. I didn't know there was a sub. Now I will wonder if that doesn't fix it. Thanks to those of you that replied about not being upset or offended.
thanksLast edited by otis11; 01-29-2023, 05:10 PM.
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Re: Samsung UN65H6203BF
I guess we will see if the board sub will work or not when it comes in. Just keep us updated. I just wonder if the old PSU is o.k. or the LED strings being open. After all the LED section on the PSU has seen a lot of heat, which does suggest either a long runtime or the LED brightness running on full tilt.
nomoresonys has a lot of experience with TV’s, helped many folks out and I am sure he will be keeping things straight. Sometimes it takes me a while to reply, that’s due to my line of work, but usually others will fill in.
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