LG 42LG70 Training Manual page 35

Power Supply Connector P204 and SC100 Voltage and Diode Check
Power Supply Connector P204 and SC100 Voltage and Diode Check
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 Open
0V 3.2V Open
0V 1.4V Open
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
March 2009
33
Label STBY Run
L
120Vac
N
LCD DV 42LG70
Diode Check
Open
Open