Test 1 120V Ac Electrical Supply - LG DLEX8100V Service Manual

Test 1
120V AC Electrical supply
NOTE: To properly check power supply in case of floating neutral or
high resistance connections, a load must be applied to the
circuit. It is important that the power button be pressed while
checking the voltages as described below.
Tap Relay Connector
Black(X4) Blue(X562)
BK WH
BR
With the dryer plugged in, press the
POWER button to turn on dryer.
Check the voltage at the main PCB
between Black wire on the blue tab
BK
relay connector(X562) and White wire
on the black tab relay connector(X4)
Is 120VAC present while pressing the
start button?
(NOTE: For gas dryers skip this step.)
With the dryer plugged in, check the
voltage at the terminal block between the
neutral (WH) and L1 (BK) terminals. Is
the voltage 120 VAC while pressing the
START/PAUSE button?
With the dryer plugged in, check the
voltage at the power cord plug
between the neutral and L1 (and L2
for electric dryers). Is the voltage 120
VAC while pressing the
START/PAUSE button?
Replace the power cord.
YES
NO
YES
YES
34
32
•Replace
main PCB.
•Replace
YES
display
PCB.
•Check
power cord.
•Check
terminal
block
NO
connections.
•Check the
power
supply fuse
or circuit
NO breaker.
•Check the
receptacle
connections.