LG MS2548GR Service Manual page 26

(TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run.
(Display operates properly)
CONDITION
Output is full power
when you set lower
power level.
NOTE: • Make sure the wire leads correct position.
• When Removing the wire leads from the parts, be sure to grasp the connector, not the wires.
• When removing the magnetron, be sure to install the magnetron gasket in the correct position
and in good condition.
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Only for training and service purposes
CHECK
Disconnect the
Abnormal.
wire leads from
relay 2 and check
continuity relay 2.
(Operate the unit)
RESULT
Defective PCB
assembly.
5-16
CAUSE REMEDY
Replace PCB
assembly.
LGE Internal Use Only