27
3. When there is no microwave oscillation
1) When touching
START
pad, oven lamp does not turn on.
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:20ms(50Hz)
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
Summary of Contents for KOR-8CBB5W
Page 5: ...4 EXTERNAL VIEW 1 OUTER DIMENSION...
Page 25: ...24 WIRING DIAGRAM...
Page 27: ...26 Measure Point MP1 MP2 GND...
Page 29: ...28 2 PCB CIRCUIT DIAGRAM...
