LG SolarDOM MP-9485S, Service Manual

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5-17
CONDITION CHECK RESULT CAUSE REMEDY
CONDITION CHECK RESULT CAUSE REMEDY
1.Setting time does
not count down
when touching
START button.
No continuity.
Continuity.
Defective
secondary switch
and secondary
switch wire
connector. Replace
secondary switch
and secondary
switch wire
connector.
Check continuity
of secondary
switch (with
door closed).
Check the con-
nection between
connector and
P.C.B assembly.
2. Fan motor,
c-motor or
oven lamp,
turntable
motor,
rotisserie
motor do not
turn on.
Abnormal
Defective fan
motor, c-motor. Replace fan
motor, c-motor.
Check fan motor,
c-motor.
Abnormal
Defective oven
lamp, turntable
motor.. Replace oven
lamp, turntable
motor.
Check oven lamp,
turntable motor.
Normal.
No continuity.
Continuity.
Defective P.C.B
assembly. Replace P.C.B
assembly.
Loose connection.
Connection then
tightly.
Output is low.
Lower than 90% of
rating voltage.
Normal.
Decrease in power
source voltage
with load.
Suggest customer
contact local
electric power
utility co. or
qualified
electrician.
Check the
power source
voltage.
Disconnect the
wire leads from
relay 4 and check
on and off time
with multitester.
Abnormal.
Normal.
Abnormal.
Defective
magnetron. Replace
magnetron.
Defective P.C.B
assembly. Replace P.C.B
assembly.
Measure the
output power.
(TROUBLE 3) Display shows all figures set, but oven does not start cooking while
desired program times are set and START button is touched.
(TROUBLE 4) Oven seems to be operation but little heat is produced in oven load.
NOTE: Simple test of power output-conducted by heating one liter water for one min. if available.
Minimum 8.5°C temperature rise is normal condition.