Samsung MAGNETRON DE6612-D, Руководство по обслуживанию

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7. Troubleshooting (Continued)
7-2 Electrical Malfunction
SYMPTOM CAUSE CORRECTIONS
Oven is dead
Main Fuse is OK.
No display and no operation
1. Open or loose lead wire harness
2. Open thermal cutout switch
(magnetron, cavity)
3. Open fuse(5A)
4. Defective Ass’y inverter P.C.B
Check wire harness
Check magnetron or cavity thermal
cutout switch is defective.
Check Ass’y Sub P.C.B
Replace Ass’y inverter P.C.B
No display and no operation
Main Fuse blown out
1. Short MOSFET
2. Mi, - polarity battery power cable
3. Defective monitor switch
4. Shorted battery power cable
5. Shorted High voltage components (NOTE 2)
Replace Ass’y Inverter P.C.B
Replace Main Fuse
Check adjustment of primary,
monitor, door sensing switch
Check battery power cable
Replace Ass’y inverter P.C.B
NOTE 1 : Check continuity power relay contact and if it has not continuity,
replace power relay also.
NOTE 2 : When Ass’y Inverter P.C.B is replaced, check magnetron also.
Oven does not accept key
input
1. Shorted or open tact switch.
2. Defective secondary latch switch (NOTE 1)
3. Defective Ass’y P.C.B Replace P.C.B main
Timer Starts countdown but
no microwave oscillation.
(No heat while oven lamp
and fan motor turn on)
1. Defective high voltage components
2. Defective primary latch switch
3. Open wire harness or terminal
Check high voltage component
according to component test
procedure and replace Ass’y
inverter P.C.B if defective
Check adjustment of primary switch
Reconnect
"nC"message
1. Open wire harness or terminal
2. Defective Ass’y inverter P.C.B
Reconnect
Replace Ass’y inverter P.C.B
"oC"message 1. Shorted high voltage component
Check high voltage components
according to component test
procedure and replace Ass’y
inverter P.C.B if defective
"nA","CE"message 1. Defective P.C.B main
Check EEPROM and replace P.C.B
main if defective