Samsung le46b530p7w

[tom66]

Re: Samsung le46b530p7w

T-con wouldn't cause this. You might have to take the panel apart to see the bulbs but you have to be so careful in doing that.

[sordids999]

Re: Samsung le46b530p7w

no listen thanks for all your help tom i really appreciate it
i think ill strip the tv and sell the parts mind you still not sure whats good and whats not !
well at least the stand works

thanks again

[tom66]

Re: Samsung le46b530p7w

Could sell it on to someone more willing to fix it (probably involve stripping it down to the bulbs), I'd buy it off you if you weren't so far away from me. Worth a lot more in one piece than in five.

[sordids999]

Re: Samsung le46b530p7w

well i could send it next day delivery if you wanted it but not sure if it will get to you in one piece

[tom66]

Re: Samsung le46b530p7w

Closest I will be is Basingstoke in about 2 weeks. If you're in the area it could make an interesting project for me. Not sure it will fit on the coach back, though...

[sordids999]

Re: Samsung le46b530p7w

nah really i can send it via carrier next day delivery for £3 if you want it im gutted but all these late nights and the wife moaning its got to go or ill strip it

[tom66]

Re: Samsung le46b530p7w

Uhh... it will probably reach me in 5 pieces if you do that. If you're serious about selling it, probably best to list it on local gumtree/ebay and be honest about diagnosis, likely panel bulb.

[sordids999]

Re: Samsung le46b530p7w

well i got a 50 inch box i can pack it if you want but upto you

[tom66]

Re: Samsung le46b530p7w

If you want to get rid of the TV I could send money for a decent courier (like DPD) where it would likely end up in one piece at the end, but it's a lot of hassle. I still reckon you could fix this yourself if you are determined.

[sordids999]

Re: Samsung le46b530p7w

it will be sent via DPD

[sordids999]

Re: Samsung le46b530p7w

And its not that i dont want to fix but its the time now to do it, see now i can switch it off and back on and the backlight is fine

[Romanus]

Re: Samsung le46b530p7w

Hi everybody.What happend to this tv?.Did anybody buy that set anf fix it? I have the same problem with the same television and I can't find the fault.Everything seems to be ok but the backlight is gone after a couple minutes.Could it be a bulb problem?

[sordids999]

Re: Samsung le46b530p7w

I ended up stripping the tv for Parts sorry but maybe Tom might help you with stripping the panel

[FPD1975W]

Re: Samsung le46b530p7w

Hi
Read this thread with interest as i had a similar problem.
The cause was C1804 open cct. .68UF 500V in the earthy end of T1801S. Replacement providing a cure.Thanks to TOM66 for the cct diagram of the psu.

[diif]

Re: Samsung le46b530p7w

I've got one of these in. I'm wondering if someone can explain what LD denotes please.
Someone has removed a diode and soldered in a bodge wire between the 12v and LD on the inverter. TV powers on but no backlight.

[dick_barton]

Re: Samsung le46b530p7w

Looking at the following schematic it looks as though LD is an output signal from the inverter board
Post #20

https://www.badcaps.net/forum/showthread.php?t=33016

[attainteddragon]

Re: Samsung le46b530p7w

ignore, saw it wrong.

[budm]

Re: Samsung le46b530p7w

LD = Lamp Detect, if Lamps are all good and stay on after the firing Voltage is applied to the Lamps, the LD should be around 11~12Vdc range, if one or more lamps do not stay on then the LD will be <10V.
That long board where the lamps are connected to is called Balancer board.

[diif]

Re: Samsung le46b530p7w

LD = Lamp Detect, if Lamps are all good and stay on after the firing Voltage is applied to the Lamps, the LD should be around 11~12Vdc range, if one or more lamps do not stay on then the LD will be <10V.
That long board where the lamps are connected to is called Balancer board.

Thank you. So that red wire was for tricking the TV into thinking the lamps are ok ? I think i'll check to see how the lamps look.

[budm]

Re: Samsung le46b530p7w

Same topology as in this Video, you can use the testing method to find out which lamp is bad.
https://www.youtube.com/watch?v=oE6K4xBVweA