J1 Front Ir/Soft Touch Key Board Voltage And Diode Check; Gnd Gnd Gnd - LG 55LW5600 Troubleshooting Manual

J1 Front IR/Soft Touch Key Board Voltage and Diode Check

J1 "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
3.55V 3.49V
3.55V 3.49V
Gnd Gnd
3.33V 3.33V
3.33V 3.33V
3.55V 3.49V
Gnd Gnd Gnd Gnd
0V 0V
1.48V 1.47V
Gnd Gnd
0V 3.33V
0V 0V
Gnd Gnd
3.55V 3.55V 3.49V 3.49V
3.55V 3.49V
90
Diode Check Di d Ch k
OL
OL
Gnd
OL
OL
OL
Gnd Gnd
OL
OL
Gnd
OL
OL
Gnd
OL OL
OL
July 201 1 LCD TV
J1
1
55LW56000