LG MH9245XAB Service Manual page 27

(TROUBLE 6) Oven does not cook properly when programmed for the set power level
(Operates properly on HIGH)
CONDITION
Output is full when
you set lower
power level.
(TROUBLE 7) Grill
CONDITION
1. Heater is not
operating.
Wire connection.
1. Lower tempera-
ture the oven.
NOTE : • Make sure the wire leads are in the 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.
CHECK
Disconnect the
Abnormal.
wire leads from
relay 2 and check
continuity relay 2.
(Operate the unit)
CHECK
Heater.
Thermostat and
relay3.(Grill)
No continuity.
Heater.
Thermostat and
relay3.(Grill)
RESULT
Defective P.C.B.
assembly.
RESULT
Abnormal.
Normal.
Abnormal.
Normal.
Open or loosen.
Malfunction the
Abnormal.
heater.
Normal.
Malfunction the
Abnormal.
thermostat.
5-17
CAUSE
Replace P.C.B.
assembly.
CAUSE
Malfunction the
Replace.
heater.
Malfunction the
Replace.
thermostat.
Replace or
connect tightly.
Replace.
Replace.
REMEDY
REMEDY