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Panasonic TH-L50B6D LED 1 Blink Code
BookWormStud:
--- Quote from: kennyc on August 23, 2017,05:46:44 ---Hello . When I am checking the LED strips I just use 2 transformers from the Xmas tree lights . You know the one that plugs into the wall and lights them . One has 12V output and the other 24V . If you are testing 8 LEDs use the 24V supply and if its 2 sets of 4 with a joinig cable betweeen them use the 12V one. I know its a bit basic but if its just to see if they all light or some are duff its a simple and easy way to do it
--- End quote ---
Do you have some pictures of the circuit?
downunder:
Re post # 22, yes, that's what I meant by earthing BL-SOS pin. If you can find the specs for your panel model, it'll probably reveal number of LEDs, how they're wired and maybe voltages required to operate them.
Bruce
kennyc:
Hello again . Only use these transformers to check the LED strips once I have opened the panel up and can test each strip individually
BookWormStud:
--- Quote from: downunder on August 23, 2017,03:59:46 ---
OK, see what you mean about the LED Tester. Perhaps Turnip will enlighten you about where he sourced his tester from - I don't think he paid anything like that for his.
Forget about the FETs -they measure OK. Re the Badcaps post, I don't find anything useful there.
The BL-SOS pin should, I expect, measure virtually 0V in a normally operating TV. So, to simulate the 0V status, you would use a piece of wire and connect it between the the BL-SOS pin and the main metal chassis, or use some sharp tweezers to connect between the BL-SOS
pin and any earth (=ground) pin on the exposed top of P2. Just interested if this stabilises the backlights. Bruce
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I tried grounding the BL_SOS to Metal Chasis, Nothing. I'm gonna try one more time, reassuring Ground BL_SOS like in attachment image.
with everything connected, right?
Also I found a post for testing Inverter Boards, I couldn't understand it properly. Here.
Turnip:
Hi, hadn't replied before as my Led Lcd tester seems no longer available.
It's nifty as applied polarity is unimportant - Strings being O/C connected the wrong way around.
Mine works automatically with a single Led or a string up to 200v where checking a screen it displays applied voltage so strings of different lengths are identified.
Trouble is if you don't know how many Leds are in a string, you don't know if one or more is S/C without taking the screen apart but it's good with an O/C string indicating max voltage far above the string usual.
Most inverters cut if a single diode is S/C or O/C after the initial power up to check. so a quick test with a meter gives an idea as to where the problem might be.
Noticed something recent and similar on Ebay from China at £18.00 inc post - Chris.
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