40
3. Case of no microwave oscillation
1) When touching M/W button, oven lamp turns on and Fan motor and turntable rotate, and cook indicator in
display comes on.
*Cause: RELAY 1 does not operate.
2) When touching M/W button, oven lamp does not turn on and turntable motor does not rotate but cook indicator
in display comes on.
*Cause: RELAY 2 does not operate.
3) When touching M/W button, oven lamp turns on and fan motor does not rotate but cook indicator in display
comes on.
*Cause: RELAY 2 does not operate.
- Check method
- Check method
STATE
RELAY 1 ON
RELAY 1 OFF
POINT A
+5V DC
GND
POINT B
GND
12V DC
B
A
D8
Q11
23 P12
22 P13
D10
Q13
D11
R31
V2
R21
R32
RY1
(MAGNETRON)
RY2
(LAMP,TRAY,FAN)
(CONV.FAN)
STATE
RELAY 2 ON
RELAY 2 OFF
POINT A
+5V DC
GND
POINT B
GND
12V DC
22 P13
R32
RY2
(LAMP,TRAY,FAN)
(CONV.FAN)
A
D11
R21
R31
V2
Q13
B
STATE
RELAY 2 ON
RELAY 2 OFF
POINT A
+5V DC
GND
POINT B
GND
12V DC
Q11
23 P12
22 P13
D10
R32
RY2
(LAMP,TRAY,FAN)
(CONV.FAN)
B
A
D11
R21
R31
V2
Q13
Summary of Contents for KOC-9Q3T7S
Page 32: ...31 10 WIRING DIAGRAM ...
Page 40: ...39 MEASUREPOINT MP1 MP2 ...
Page 44: ...43 13 P C B CIRCUIT DIAGRAM ...