Daewoo KOR-631R0S, Руководство по обслуживанию

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PRINTED CIRCUIT BOARD
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 1 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.
POINT
STATE
A B
R ELA Y 2 O N - 5V D C G N D
R ELA Y 2 O F F G N D - 1 2 VD C
P OINT
STATE
A B
R ELA Y 1 O N -5V D C G N D
R ELA Y 1 O F F G N D -12V D C
PO INT
STATE
A B
1) D O O R O P E N O P E N -5V D C
2) D O O R C LO SE D C LO S E G N D
CHECK N O METHOD REM EDY
1
C heck the stage(O N ,O F F) of the door open m onitor sw itch by resistance
m easurem ent.
R eplace door open m onitor sw itch.
POINT W AVE FORM
A T: 20 m s(50H z)