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 | B |
STATE | A | |
|
| |
|
|
|
RELAY 2 ON | GND | |
RELAY 2 OFF | GND |
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 | B |
STATE | A | |
|
| |
|
|
|
RELAY 1 ON | GND | |
RELAY 1 OFF | GND |
4.When the door is opened during operation the count down timer does not stop. refer to Circuit Diagram (point 1)
-Check method
| POINT | B |
STATE | A | |
|
| |
|
|
|
1) DOOR OPEN | OPEN | |
2) DOOR CLOSED | CLOSE | GND |
CHECK NO | HETHOD | REMEDY |
|
|
|
1 | Check the stage(ON, OFF) of the secondary interlock | Replace door open monitor switch. |
| switch by resistance measurement. |
|
|
|
|
5.When the digital clock does not operate properly. refer to Circuit Diagram (point 5)
POINT
WAVE FORM
A
T: 16.67 ms(60Hz)
If clock does not keep exact time, you must check resistor R15,16, zener diode ZD1.
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