Daewoo KOC-984T, Service Manual, Page: 32 / 36

32
PRINTED WIRING BOARD
4. Case of no microwave oscillation
(1) Situation : When touching M/W button, oven lamp turns on, fan motor and turntable motor rotate and cook
indicator in the display comes on.
•
CAUSE : Relay 1 (RY1) does not operate.
•
Check method
(2) Situation : When touching M/W button, oven lamp does not turn on and turntable motor does not rotate but cook
indicator in the display comes on.
•
CAUSE :
Relay 3 (RY3) does not operate.
•
Check method
(3) Situation : When touching M/W button, oven lamp turns on and fan motor does not rotate but cook
indicator in the display comes on.
•
CAUSE :
Relay 4 (RY4) does not operate.
KOC-984T
STAGE POIN T A POINT B
R ELAY O N + 5 V D C G N D
R EL AY O F F G N D +1 2 V D C
KO C-984T
STAGE POIN T A POINT B
R ELAY O N + 5 V D C G N D
R EL AY O F F G N D +1 2 V D C
KOC-984T