(TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run (Display operates properly)
CONDITION
No microwave oscillation.
CHECK | RESULT | |
Disconnect the | No continuity. | |
wire leads from | ||
| ||
relay 2 and |
| |
check continuity | Continuity. | |
of relay2. | ||
| ||
(Operate the unit) |
| |
Check high vol- | Abnormal | |
tage transformer | ||
|
Normal
CAUSE
Defective P.C.B assembly
Defective high voltage transformer.
REMEDY
Replace P.C.B assembly
Replace high voltage transformer.
Check high vol- | Abnormal | Defective high | |
tage capacitor | voltage capacitor. | ||
| |||
| Normal |
| |
Check high vol- | Abnormal | Defective high | |
tage diode | voltage diode. | ||
| |||
| Normal |
| |
Check | Abnormal | Defective | |
magnetron. | magnetron. | ||
|
Replace high voltage capacitor.
Replace high voltage diode.
Replace magnetron.
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.
Output is full power when you set lower power level.
Disconnect the wire leads from relay 2 and check continuity relay 2. (Operate the unit)
Abnormal.
Defective P.C.B. assembly.
Replace P.C.B. assembly.
