Greetings to all, Can anyone tell me how to reduce backlight current on this TCL TP.MS6308.PB775. The Board uses GB98AERN backlight controller IC. The original light bars are burn. It uses two bar in series. Each bar has six LED. The LED are 6V. The voltage across the two new bars 77V and 306ma current. The bars are getting hot in less than 5 minutes so I think the current is too high and the bars will burn soon again. Can anyone help?
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TCL TP.MS6308.PB775 backlight current too high?
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Re: TCL TP.MS6308.PB775 backlight current too high?
Tomtech has some he did, there's a few more on the list to the right there, a schematic of your powerboard would help, no tcl's but shows you the gist of it: https://www.youtube.com/watch?v=GrfS...gtd-hcUXG2KjSCLast edited by nomoresonys; 11-24-2019, 11:08 AM.Quit due to disrespect from unpaid sta,ff.
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Re: TCL TP.MS6308.PB775 backlight current too high?
Ah, I see, my bad for assuming hate when that happens.Last edited by nomoresonys; 11-24-2019, 12:12 PM.Quit due to disrespect from unpaid sta,ff.
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Re: TCL TP.MS6308.PB775 backlight current too high?
I need to see high res pictures of the whole top and bottom side of the board and also close up of the LED connector to show how the wires are attached to the LED connector.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Re: TCL TP.MS6308.PB775 backlight current too high?
Thanks to all who responded to my question and also to all who did some research but did not post a reply. I found the solution from many Russian forum. The solution is to change the resistor at pin 6 (ISET). The resistor on my board was 16.5K when removed. This resistor went from pin6 to ground. I replaces it with a 33K and the current drop to 150ma from 306ma and the voltage across the strips drop to 71V. I had to used Google translate to get the info because its all in Russian.
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