3. When there is no microwave oscillation
1) When touching
START pad, oven lamp does not turn on.
the
the
Fan motor does not rotate, but cook indicator in display comes on.
- Check method
2) When touching
START pad, oven lamp turns on.
Fan motor and turntable rotate and cook indicator in display comes on.
- Check method
4. When the door is opened during operation, the count down timer does not stop.
-Check method
5. When the digital clock does not operate properly.
Refer to Circuit Diagram.
* If clock does not keep exact time, you must check resistor R20 and zener diode ZD2.
STATE
POINT
A
B
RELAY 2 ON
5VDC
GND
RELAY 2 OFF
GND
12VDC
STATE
POINT
A
B
RELAY 1 ON
5VDC
GND
RELAY 1 OFF
GND
12VDC
STATE
POINT
A
B
1) DOOR OPEN
OPEN
5VDC
2) DOOR CLOSED
CLOSE
GND
CHECK NO
METHOD
REMEDY
1
Check the stage (ON, OFF) of the door open monitor switch by
Replace door open monitor
resistance measurement.
switch.
POINT
WAVE FORM
IC 1 PIN 8
T: 16.67ms(60Hz)
B
A
RY2
RY2
(TRAY
LAMP)
Q10
42
D10
RY1
(M/W)
41
D8
B
A
RY1
Q9
CN1
1
2
C1
+5V
R9
C2
27
R1
R10
D.O.M SW
A
B
26
