27
3. When there is no microwave oscillation
1) When pressing START pad, oven lamp does not turn on.
Fan motor do not rotate, but cook indicator in display comes on.
- Check method
STATE
POINT
A B
RELAY 3 ON 5V GND
RELAY 3 OFF GND 12V
2) When pressing START pad, oven lamp turns on.
Fan motor and turntable rotate and cook indicator in display comes on.
- Check method
STATE
POINT
A B
RELAY 1 ON 5V GND
RELAY 1 OFF GND 12V
- Check method
STATE
POINT
A B
1) DOOR OPEN OPEN 5VDC
2) DOOR CLOSED CLOSE GND
4. When the door is opened during operation, the count down timer does not stop.
5. When the digital clock does not operate properly.
refer to Circuit Diagram
* If clock does not keep exact time, you must check resistor Q7, D7, C11, C13, R32 and R34.
CHECK NO METHOD REMEDY
POINT WAVE FORM
IC 1 PIN 8
LAMP
RY11
PCJ-112D3M
D25
1N4148
Q25
KRC246S
1
2
J13
1 2
J18
RY9
PCJ-112D3M
D26
1N4148
Q24
KRC246S
1 2
J17
1 2
J15
RY10
PCJ-112D3M
D24
1N4148
Q23
KRC246S
1 2
J16
1 2
J12
1 2
J14
1 2
J11
7
6
5
4
3
2
1
1
2
3
4
5
6
7
CN2
CON_YW396-11AV_7P
D23
DOM_IN
V_RELAY
A B
HOOD_LAMP
HOOD_LAMP_2
INNER_LAMP
GND
AC2
A B
T
T:16.67ms(60Hz)
5V
0V
1
Check the stage (ON, OFF) of the door open monitor switch by
resistance measurement.
Replace door open monitor
switch.
B A
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