GE TMW-1100EC 用户手册
36
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
2) When touching START pad, oven lamp turns on.
Fan motor rotates and cook indicator in display comes on.
✻
Cause : RELAY 1 does not operate.
→
refer to Circuit Diagram (point 2)
- Check method
4. When the door is opened during operation the count down timer does not stop.
→
refer to Circuit Diagram (point 1)
- Check method
5. When the digital clock does not operate properly.
→
refer to Circuit Diagram (point 5)
❈
If clock does not keep exact time, you must check resistor R26,19, transistor Q6.
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
POINT
A
B
STATE
1) DOOR OPEN
OPEN
5VDC
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.
POINT
WAVE FORM
A
5V
0V
T: 16.67 ms(60Hz)