LG LMV2015SB, Service Manual

Page: 15 / 50

3
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1
When you push the any key,
is there any beep sound
Does the display operate?
No
No
Yes
2
Is the connector connected
to PCB?
Power Off
Oven Thermostat
Magnetron Thermostat
No
Yes
Go to No.8 of
this flow chart.
Is there any beep sound in
continuity test between the
power code and connector?
Code “L” to Pin3
Code “N” to Pin5
No
Yes
Check PCB
Go to No.8 of
this flow chart.
Go to No.8 of
this flow chart.
4
Is there any beep sound in
continuity test between the
ends of thermostats? (Oven,
Heater, Magnetron)
Yes
No
Replace the
thermostats.
L
L
L
L L
L
L
L
L L L L L
L
L
L
L L
L
L L
L
N
N
N N
N
N
N
N
N N N N N
N
N
N
N
N N
N N
N
Heater Thermostat