LG 32LG40 Training Manual page 36

CIRCUIT DeSCRIPTIONS
FRONT BOARD vOlTAGES
Resistance should be taken in diode mode with the connectors removed.
3
J1 "Front board" to P401 "Main"
Pin Label
2
1 KEY3
2 KEY4
3 Gnd
L
4 Gnd
5 KEY-1
6 KEY-2
G
7 n/c
8 ST-5V
9 PWM-LED
4
10
11 n/c
0
12 Gnd
13 LED-G
14 LED-R
15 Gnd
SIDE CONTROl kEYS
Resistance should be taken in diode mode with the connectors removed.
36 36
Fall 2008 LCD Training Fall 2008 LCD Training
Stby Run Diode Check
3.4V 3.4V
3.4V 3.4V
0V 0V
0V 0V
3.4V 3.4V
3.4V 3.4V
0V 0V
5V 5V
0V 0V
IR 4.1V 4.1V
0V 0V
0V 0V
0V 2.1V
2.1V 0V
0V 0V
J2 "Front board" to P101 "Side Key"
Pin Label Stby
OL 1 Key 1
OL 2 Gnd
Gnd 3 Key 2 3.41V 3.41V
Gnd 4 Gnd
OL 5 Key 3 3.41V 3.41V
OL 6 Gnd
OL 7 Key 4 3.41V 3.41V
2.7V 8 Gnd
2.4V
OL
OL
Gnd
3.2V
3.2V
Gnd
P101 "Side Control" to J2 "Front"
Pin Label Stby
1 Key 1 3.4V
2 Gnd 0V
3 Key 2 3.41V 3.41V
4 Gnd 0V
5 Key 3 3.41V 3.41V
6 Gnd 0V
7 Key 4 3.41V 3.41V
8 Gnd 0V
Run Diode Check
3.4V 3.4V OL
0V 0V Gnd
OL
0V 0V Gnd
OL
0V 0V Gnd
OL
0V 0V Gnd
Run Diode Check
3.4V OL
0V Gnd
OL
0V Gnd
OL
0V Gnd
OL
0V Gnd