LG MC2841SPS Service Manual page 29

(TROUBLE 8) Display shows error mode
CONDITION
Display shows
Check the
"F02"
connnection
between
thermistor and
P.C.B. assembly
Check the
thermistor
CONDITION
Display shows
Check the
"F01"
connnection
between
Thermistor and
P.C.B. assembly
Check the
thermistor
Check the heater
(TROUBLE 9) Oven seems to be in operation but no heating is produced in Micro Mode
CONDITION
No Output in Micro
Check HV Fuse
Mode.
CHECK RESULT
No continuity
Continuity
Abnormal.
Normal.
CHECK RESULT
No continuity
Continuity
Abnormal.
Normal.
Abnormal.
Normal.
CHECK RESULT
Open
CAUSE
Loose connection
Defective thermistor
(Thermistor shorted)
Defective
P.C.B Assembly
CAUSE
Loose connection
Defective thermistor
(Thermistor opened)
Defective heater
(Heater opened)
Defective
P.C.B. Assembly
CAUSE
HVD,HVC
or MGT NG
5-19
REMEDY
Connect them
tightly
Replace the
thermistor
Replace the
P.C.B. assembly
REMEDY
Connect them
tightly
Replace the
thermistor
Replace the
heater
Replace the
P.C.B. Assembly
REMEDY
First Replace Defective
Part MGT/HVC/HVD
Then Replace HV Fuse