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SOLVED : Philips PFL5507K/12 backlight come on for a second
frake50:
Hello every one,
i got this set from friends, and it had fault, that when i power it on the LED Backlight come on fro a seond and show on the LCD the sand clock, then backlight go off the TV keep on,
with torch lamp can see the Picture normal as well the sound. RC control working fine.
the power board had integrated LED Inverter from Delta DPS-119AP , i found Diagram of this part, but there no much Value on it.
this why i am here to asking if any of you faced same Problem, and which Part on the PWB fault ? :sign0085:
Any suggestion appreciated it.
jordan:
Software update
frake50:
Thanks Jordan,
of sure the first things i did make update and write it again both software, main software and standby software. they are not the reason.
its 99% PSU, 1% LED string, but the string lines i had all checked by trick i use always with TOSHIBA which had same panel from samsung, by add 10 Ohm Resistor parallel to the line to trick the Protector that no one LED OPEN. and the result was all line do the same by add the 10Ohm coming on for 1 second at start up..
downunder:
This sounds interesting. Where exactly did you connect the 10 (100) ohm resistor to test the LED strips? Please explain.
Bruce
frake50:
from LED driver, there will be always plug going to the LED strips, 4 white and one Black, black are mass. and the 4 white are regarding to LED strips, those just separated them, and one by one cut and add parallel 10 Ohm 10 watt Resistor to dummy the driver there are no open LED. at the right Line all LED Back light will turn on.... if the Problem with them as OFF mean there no fault at strips.
this is regard all Samsung Panel or LG. which used by most other LCD TV brand. like Toshiba, at Toshiba always this happen by Panel size 46.
other way to know if there are LED fault at strips with out need to take LCD out. just i disable the protection if the TV came with LED Driver separated from Power Supply. just took the plug out which between PWB and LED Driver and plug it again this will trick the protection, and LED all come on. this method specially useful by TOSHIBA.
Back to my problem, still i do search on defect Parts on the PSU :dubbio:
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