LG 42LG70 Training Manual page 33

Power Supply Connector P204 and SC100 Voltage and Resistance
Power Supply Connector P204 and SC100 Voltage and Resistance
P204 MCN1 "SMPS" to MCN1 "BALLAST"
Pin Label
1 24V
2 24V
3 24V
4 24V
5 24V
6 Gnd
7 Gnd
8 Gnd
9 Gnd
10 Gnd
11 *BR1
12 On/Off
13 *PWM-DIM
1
BR1 (ADIM Pin 21) Fixed and not used
2
PWM-DIM (PDIM Pin 22) can vary according to type of signal being processed, OSD Backlight setting. 0.9V 0%
to 3.3V 100% and the Intelligent Sensor. Output from the BCM chip.
Diode Mode values taken with all Connectors Removed
STBY Run Diode Check
0V 24V 0.72V
0V 24V 0.72V
0V 24V 0.72V
0V 24V 0.72V
0V 24V 0.72V
Gnd Gnd
Gnd Gnd
Gnd Gnd
Gnd Gnd
Gnd Gnd
0V 1.7V
0V 3.2V
0V 1.4V
SC100 "SMPS" to AC IN
Pin
1
2
READING FROM PIN 1 TO PIN 2 for STBY
and RUN voltages.
Gnd
Gnd
Gnd
Gnd
Gnd
OL
OL
OL
Spring 2009
33
Label STBY Run
L
120Vac
N
LCD DV
Diode Check
OL
OL
42LG70