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(TROUBLE 7) Heater
CONDITION
1. Heater is not
operating.
2. Lower tempera-
ture the oven.
NOTE: * Make sure the wire leads correct position.
* When removing the wire leads from 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.
(TROUBLE 8) Display shows all figures set, but oven does not operate the all keys.
CONDITION
No operation
of All Keys.
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Relay 4- Halogen Heater
Relay 5- Up. sheath Heater
Relay 6- Back. sheath Heater
CHECK
Heater.
Thermostat and
relay 4, 5, 6.
Wire connection.
Heater.
Thermostat and
relay 4, 5, 6.
CHECK
Check continuity
Of secondary
Switch (with
Door Closed).
Check the
connection
Between connector
and P.C.B
Assembly.
RESULT
Abnormal.
Normal.
Abnormal
Normal.
No continuity.
Abnormal.
Normal.
Abnormal
RESULT
No continuity.
continuity.
No continuity.
continuity.
5-20
CAUSE
Malfunction of the
heater.
Malfunction of the
thermostat and
relay 4, 5, 6
Open or loosen.
Malfunction of the
heater.
Malfunction of the
thermostat and
relay 4, 5, 6
CAUSE
Defective
Secondary switch
And secondary
switch Connector.
Defective
P.C.B Assembly.
Loose connection.
REMEDY
Replace.
Replace.
Replace or
connect tightly.
Replace.
Replace.
REMEDY
Replace
Secondary switch
And secondary
Switch wire
connector.
Replace
P.C.B Assembly.
Connection then
tightly.
LGE Internal Use Only
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