hi.
in the first the problem was backlight for sec then off.
the power supply board is cvb32005 all capi ok all voltage ok exept the voltage to the led backlight that go high to about 80v and then go down to about 25-30v.
the source of this voltage is IC OB3350CP AND A FET AND CIOL AND DIODE its similar to pfc circle after checking all voltages and resi diode the backlight stop working.
i dismantel the panel to check the led strips.
ther 3 lines in parrlel each line with 9 leds.
i present an ext supply of about 5v to each led and i found in each line a 3 led that not lighting when supply is present to each led seperet.first were can i find this kind of leds ? AND IS IT POSIBEL that the high voltage from the power supply of 80v-100v could damage them? what is voltage that this led should light?.
thanks willyam
in the first the problem was backlight for sec then off.
the power supply board is cvb32005 all capi ok all voltage ok exept the voltage to the led backlight that go high to about 80v and then go down to about 25-30v.
the source of this voltage is IC OB3350CP AND A FET AND CIOL AND DIODE its similar to pfc circle after checking all voltages and resi diode the backlight stop working.
i dismantel the panel to check the led strips.
ther 3 lines in parrlel each line with 9 leds.
i present an ext supply of about 5v to each led and i found in each line a 3 led that not lighting when supply is present to each led seperet.first were can i find this kind of leds ? AND IS IT POSIBEL that the high voltage from the power supply of 80v-100v could damage them? what is voltage that this led should light?.
thanks willyam
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