LG 42LV5500 Training Presentation page 80

P1 Front IR/Soft Touch Key Board Voltage and Diode Check
P1 "IR Board" To P901 "Main Board"
Pin Pi L b l Label
1 SCL
2 SDA
3 Gnd
4 KEY 1
5 KEY 2
6 3.5V_ST
7 7 Gnd Gnd
8 LED_B/BUZZ
9 IR
10 Gnd
11 +3.3V_Normal
12 LED_R/BUZZ
13 Gnd
14 14 S/T_SCL S/T SCL
15 S/T_SDA
(1) Clock & Data pulses only present when Intelligent Sensor is turned on. (3.6V p/p)
(2) IR pulses (2V p/p)
(3) (3) Clock & Data pulses only present when Set is turned on or Off. (3.9V p/p)
Diode Mode values taken with all Connectors Removed
STBY STBY R Run
2.9V 3.49V
2.92V 3.49V
Gnd Gnd
3.26V 3.28V
3.26V 3.28V
3.55V 3.49V
Gnd Gnd Gnd Gnd
0V 0V
1.48V 1.45V
Gnd Gnd
0.35V 3.34V
0V 0V
Gnd Gnd
3.55V 3.55V 3.49V 3.49V
3.55V 3.49V
Di d Ch Diode Check k
OL
OL
Gnd
2.3V
2.3V
1.68V
Gnd Gnd
OL
2.61V
Gnd
OL
OL
Gnd
2.39V 2.39V
2.39V
May 201 1 LCD TV 42LV5500
80
P1
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