LG 47LG90 T-CON CONTROLLER BOARD - VOLTAGE CHART

The T-Con IC UC2 receives from main board at CV-1 & CN-2 quadaple 12 bit LVDS signals which it processes into TFT drive signals through connectors.  CN-4 and CN-5 controls the LCD panel.  ICs U-12 & U-13 are dynamic RAM ICs, which are hi-speed storage devices.  12V is supplied to T-Con board on connector CN-1
In this set, T-Con also drives the back light LEDs in accordance to necessary light source intensity according to the video contents.  Control signals to the inverter are sent out CN-8&CN9.

                                                    T-Con board Out of the Shield.
CN-304 INVERTR 'M' TO CN-8 T-CON

Pin	Label	Stby	Run	Diode check	Pin
1,2,3	Gnd	Gnd	Gnd	gnd	14,15,16
4	EXT VBRB	UV	1.3V	OPEN	13
5	GND	GND	GND	GND	12
6	AFLC_SPI_EN	0	0.1	1.0	11
7	AFLC_DET	0	0	1.1V	10
8	VBR_LAT	0	0	OPEN	9
9	VBR_SIN	0	0	OPEN	8
10	VBR-SCLK	0	0	OPEN	7
11	DRV_XLATO	0	0	1.0V	6
12	N/C	N/C	N/C	OPEN	5
13	DRV_SIND	0	1V	1.0V	4
14	DRV_SCLK0	0	1V	1.0V	3
15	DRV_BLK0	0	0	0.9V	2
16	DRV_GSCLK0	0	1.7V	0.9V	1

CN804 INVERTER 'S' TO CN9 T-CON

PIN	LABEL	STBY	RUN	DIODE CHECK	PIN
14,15,16	GND	GND	GND	GND	1,2,3
13	N/C	N/C	N/C	OPEN	4
12	N/C	N/C	GND	GND	5
11	AFLC_SPI_EN	0	0.13V	1V	6
10	AFLC_DET	0	0	1.1V	7
9	VBR_LAT	0	0	OPEN	8
8	VBR_SIN	0	0	OPEN	9
7	VBR_SCLK	0	0	OPEN	10
6	DRV_XLATO	0	0	1V	13
5	N/C	N/C	N/C	OPEN	12
4	DRV_SIN0	0	1V	1V	13
3	DRV_SCLK0	0	1V	1V	14
2	DRV_BLK0	0	0	0.9V	15
1	DRV_GSCLK0	0	1.7V	0.9V	16

T-CON TFT DRIVE PWB DC TO DC CONVERTER CHECK

Cathode voltage of D12 > 3.4V
Cathode voltage of D13 > 16.1V
Cathode voltage of D17 > 3.5V