Hi all,
I have an LG47ODUE that shows LG Logo then goes black under torchlight image is visible.
Power supply board tests:
Standby voltages: in order on connector:
9) Ground - Ground = 0.0v
8) 12v - NC = 11.95v
7) 12v - 12v = 11.95v
6) Ground - Ground = 0.0v
5) 24v - 24v = 24.77v
4) Ground - Ground = 0.0v
3) 3.5v - PDIM2 = 3.54v
2) 3.5v - PDIM1 = 3.55v
1) PwrOn - DrvOn = 3.42v
Most voltages not present until standby button is pressed
Led Connector Tests:
106v down to 82.2v at led connector on both lines. LEDs connected
115v down to 82.2v at led connector on both lines. LEDs disconnected.
Diode Side Test: (red probe to cathode side and black to test points at led connector)
97v and decreases - cathode side of diode to test point at led connector.
LEDs have been checked out of the unit on a DC power supply two strips at 30v all LEDs work.
Work has been carried out previously as jumpers on led strips. Work fine out of unit on DCPS.
I had image but no backlight.
Could this be a caps issue???
Does the TV need all LEDs connected to work correctly (ie) cut out if not enough LEDs for load.
Obviously 88.2v is not enough to drive the leds
Anjy help will be most welcome
Regards Dee
I have an LG47ODUE that shows LG Logo then goes black under torchlight image is visible.
Power supply board tests:
Standby voltages: in order on connector:
9) Ground - Ground = 0.0v
8) 12v - NC = 11.95v
7) 12v - 12v = 11.95v
6) Ground - Ground = 0.0v
5) 24v - 24v = 24.77v
4) Ground - Ground = 0.0v
3) 3.5v - PDIM2 = 3.54v
2) 3.5v - PDIM1 = 3.55v
1) PwrOn - DrvOn = 3.42v
Most voltages not present until standby button is pressed
Led Connector Tests:
106v down to 82.2v at led connector on both lines. LEDs connected
115v down to 82.2v at led connector on both lines. LEDs disconnected.
Diode Side Test: (red probe to cathode side and black to test points at led connector)
97v and decreases - cathode side of diode to test point at led connector.
LEDs have been checked out of the unit on a DC power supply two strips at 30v all LEDs work.
Work has been carried out previously as jumpers on led strips. Work fine out of unit on DCPS.
I had image but no backlight.
Could this be a caps issue???
Does the TV need all LEDs connected to work correctly (ie) cut out if not enough LEDs for load.
Obviously 88.2v is not enough to drive the leds
Anjy help will be most welcome
Regards Dee
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