LG 42LH90 - Channel Setup: Automatic Tuning; Performing Automatic Channel Scan

LCD DV 42LH90
40
February 2010
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
AC Voltage Readings (From Hot Ground)
Pins 1 and 2 for STBY and RUN.
OLNE7
OL
120Vac
LE3
Diode CheckRun STBYLabelPin
OLn/aE5
OL
120Vac
n/aE4
Diode CheckRun STBYLabelPin
SK100 "SMPS" to AC IN SK101 "SMPS" to MASTER POWER SWITCH
SK101 SK100
Bottom
Right of
SMPS
Live
Neutral
With the Master Power Switch
Closed (On) AC flows.
When Open (Off) AC open and does not flow.
F100
F100
8A/250V
AC IN
F100 (Diode Check)
Main Power Switch Closed
Red Lead on Fuse (Open)
Black Lead on Hot Ground
Black Lead on Fuse (0.525V)
Red Lead on Hot Ground
E4 E5
E3
E7
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.