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4) When there is no microwave oscillation
a. When touching SRART pad, oven lamp does not turn on.
Fan motor and turntable motor do not rotate, but cook indicator in display comes on.
* Cause : RELAY 2 does not operate.
- Check method
STATE
RELAY2 ON
RELAY2 OFF
b. When touching SRART pad, oven lamp turns on.
Fan motor and turntable motor rotate, and cook indicator in display comes on.
* Cause : RELAY 1 does not operate. i refer to the Circuit Diagram (Point 2).
- Check method
STATE
RELAY1 ON
RELAY1 OFF
5) When the door is opened during operation, the count down timer does not stop.
irefer to the Circuit Diagram (Point 1).
- Check method
STATE
1) DOOR OPEN
2) DOOR CLOSED
CHECK NO
Check the stage (ON, OFF) of the door open monitor switch by
1
resistance measurement.
6) When the digital clock does not operate properly.
i refer to the Circuit Diagram (Point 5).
POINT
A
* If clock does not keep exact time, you must check resistor R11, R12.
refer to the Circuit Diagram (Point 3).
POINT
POINT
POINT
METHOD
0V
-19V
A
-5VDC
GND
A
-5VDC
GND
A
OPEN
CLOSE
Replace door open monitor switch.
WAVE FORM
T=16.67ms
37
PRINTED CIRCUIT BOARD
B
GND
-24VDC
B
GND
-24VDC
B
-5VDC
GND
REMEDY
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