LG 42LH90 Manual page 40

Power Supply Connector SK100 and SK101 Voltage and Diode Check
Power Supply Connector SK100 and SK101 Voltage and Diode Check
Diode Mode values taken with all Connectors Removed
SK100 "SMPS" to AC IN
Pin Label STBY
E3 L
E7 N
AC Voltage Readings (From Hot Ground)
Pins 1 and 2 for STBY and RUN.
Bottom
Right of
SMPS
F100
8A/250V
E4
AC IN
SK101
Run Diode Check
OL
120Vac
OL
F100
E7
E5
E3
Live
SK101 "SMPS" to MASTER POWER SWITCH
Pin Label STBY
E4 n/a
120Vac
E5 n/a
AC Voltage Readings for either pin 1 or pin 2 in
STBY and RUN with one lead on Neutral of
SK100. (Reading from Hot Ground)
Note: With Main Power Switch Open, E5 has no
AC. E4 does have AC.
With the Master Power Switch
Closed (On) AC flows.
When Open (Off) AC open and does not flow.
Main Power Switch Closed
Neutral
Red Lead on Fuse (Open)
Black Lead on Fuse (0.525V)
SK100
40 February 2010
Run Diode Check
OL
OL
F100 (Diode Check)
Black Lead on Hot Ground
Red Lead on Hot Ground
LCD DV 42LH90