Saturday, September 15, 2012

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