Inverter Component Top Half Identification - LG 42LH90 Manual

Inverter Component Top Half Identification

Inverter Component Top Half Identification
Example: Q35
Example
Q19 through Q50
Note: Each output driver (switch) has a TP
to the left and right representing a "V"
which indicates a Block of LEDs.
In the example Q35 above;
V34 represents Pin 23 of CN4
V33 represents Pin 24 of CN4
Grounding these points when the 27.6V
supplies are working will cause the entire
Block of Backlight LEDs to turn on.
(100mA to light one block)
D302 blinks at
1Hz when all
is OK
Q35 - Q50
Are LED Block
Drivers for CN3
Local Dimming Control Signals
Voltage Supplies to each connector.
27.5V Line on CN3
Pins 1-2 (Out_M2)
Pins 13-14 (Out_M2)
Pins 16-17 (Out_M2)
Pins 26-29 (Out_M2)
Pins 31-32 (Out_M4)
Pins 43-44 (Out_M4)
Pins 46-47 (Out_M4)
Pins 58-59 (Out_M4)
50 February 2010
To P306 from Main
Q19 - Q34
Are LED Block
Drivers fro CN4
CN3
27.5V Line on CN4
Pins 1-2 (Out_M3)
Pins 13-14 (Out_M3)
Pins 16-17 (Out_M3)
Pins 26-29 (Out_M3)
Pins 31-32 (Out_M1)
Pins 43-44 (Out_M1)
Pins 46-47 (Out_M1)
Pins 58-59 (Out_M1)
LCD DV 42LH90
CN4