3.When there is no microwave oscillation
1)When touching START pad, oven lamp does not turn on.
Fan motor do not rotate, but cook indicator in display comes on.
✻ Cause : RELAY 2 does not operate. → refer to Circuit Diagram (point 3) - Check method
| POINT | A | B |
STATE |
| ||
|
|
| |
|
|
|
|
RELAY 2 ON |
|
| GND |
|
|
|
|
RELAY 2 OFF |
| GND |
|
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|
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2)When touching START pad, oven lamp turns on.
Fan motor and turntable rotate and cook indicator in display comes on.
✻ Cause : RELAY 1 does not operate. → refer to Circuit Diagram (point 2) - Check method
| POINT | A | B |
STATE |
| ||
|
|
| |
|
|
|
|
RELAY 1 ON |
| GND | |
|
|
|
|
RELAY 1 OFF |
| GND |
|
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|
|
|
4.When there is no grill oscillation.
✻Cause : RELAY 3 does not operate. → refer to Circuit Diagram (point 6) - Check method
| POINT | A | B |
STATE |
| ||
|
|
| |
|
|
|
|
RELAY 3 ON |
| GND | |
|
|
|
|
RELAY 3 OFF |
| GND | |
|
|
|
|
5. When the door is opened during operation, the count down timer does not stop.
→refer to Circuit Diagram (point 1) - Check method
| POINT | A | B |
STATE |
| ||
|
|
| |
|
|
|
|
1) DOOR OPEN |
| OPEN | |
|
|
|
|
2) DOOR CLOSED |
| CLOSE | GND |
|
|
|
|
CHECK NO | HETHOD | REMEDY |
|
|
|
1 | Check the stage(ON, OFF) of the door open monitor | Replace door open monitor switch. |
| switch by resistance measurement. |
|
|
|
|
6.When the digital clock does not operate properly.
→refer to Circuit Diagram (point 5)
POINT
WAVE FORM
A
T: 20 ms(50Hz)
❈If clock does not keep exact time, you must check resistor R15,16, zener diode ZD1.
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