LG 42LH20 Service Manual page 31

Power Supply Connector SK101 and SK102 Voltage and Diode Check
Power Supply Connector SK101 and SK102 Voltage and Diode Check
Diode Mode values taken with all Connectors Removed
SK101 "SMPS" to AC IN
Pin Label STBY
1 L
2 N
AC Voltage Readings Across Pins 1 and 2
for STBY and RUN.
SK102
Run Diode Check
OL
120Vac
OL
Bottom Right of SMPS
Live
SK102 "SMPS" to MASTER POWER SWITCH
Pin Label STBY
1 n/a
120Vac
2 n/a
AC Voltage Readings for either pin 1 or pin
2 in STBY and RUN with one lead on
Neutral of SK101.
With the Master Power Switch
Closed (On) AC flows.
When Open (Off) AC open and does
not flow.
Neutral
SK101
31
Run Diode Check
OL
OL
February 2009 42LH20