Daewoo KOR-630A0S, Руководство по обслуживанию, Страница: 27 / 33

3) W hen there is no microwave oscillation
(1) W hen touching START pad, oven lam p does not turn on.
Fan m otor do not rotate, but cook indicator in display com es on.
Cause : RELAY 2 does not operate. refer to Circuit Diagram ( Point 3 )
- Check m ethod
(2) W hen touching START pad, oven lam p turns on.
Fan m otor and turntable rotate and cook indicator in display com es on.
Cause : RELAY 2 does not operate. refer to Circuit Diagram ( Point 2 )
- Check m ethod
4) W hen the door is opened during operation, the Count down timer does not stop.
refer to Circuit Diagram ( Point 1 )
- Check m ethod
5) W hen the digital clock does not operate properly.
refer to Circuit Diagram ( Point 5 )
If clock does not keep exact tim e, you m ust check resistor R15,16, zener diodeZD1.
P OINT
STATE
A B
RE LA Y 2 O N - 5V D C G N D
RE LA Y 2 O F F G N D - 1 2 V D C
POINT
STATE
A B
R E LA Y 1 O N -5VD C G N D
RE LA Y 1 O FF G N D -1 2 VD C
POINT
STATE
A B
D O O R O PE N O P EN -5V D C
D O O R C LO S E D C LO SE G N D
CHECK N O METHOD REM EDY
1
C heck the stage(O N ,O FF ) of the secondary interlock sw itch by resistance
m easurem ent. R eplace secondary interlock sw itch.
POINT W AVE FORM
A T: 20 m s(50H z)
PRINTED CIRCUIT BOARD