28
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.
POINT
A
B
STATE
RELAY 2
ON
5VDC
GND
RELAY 2
OFF
GND
12VDC
POINT
A
B
STATE
RELAY 1
ON
5VDC
GND
RELAY 1
OFF
GND
12VDC
B
A
RY2
RY2
(TRAY
LAMP)
Q12
KTC3198GR
42
D9
1N4148
R17
R18 4.7K
100
1
/
4
W
RY1
(M/W)
41
D8
1N4148
B
A
RY1
Q10
KRC106M
R2
47K
R3
10K
A
B
1
2
D.O.M SW
R1
4.7K
Q1
A1266Y
C1
104Z
D6
1N4148
+5V
+5V
27