Samsung Electronics
6-2
Troubleshooting
SYMPTOM
CAUSE
CORRECTIONS
Oven can program but timer
1. Open or loose wiring of secondary
Adjust door and interlock switches.
does not start.
interlock switch
2. Off-alignment of primary interlock
3. Defective secondary interlock S/W
Microwave output is low;.
1. Decrease in power source voltage.
Consult electrician.
Oven takes longer time to
2. Open or loose wiring of magnetron
cook food.
filament circuit. (Intermittent oscillation))
3. Aging of magnetron
Fan motor turns on when plugged in
Loose wiring of door sensing switch
Check wire of door sensing switch.
Oven does not operate and return
Defective Ass'y PCB
Replace PCB main.
to the plugged in mode.
Loud buzzing noise can be heard.
1. Loose fan and fan motor
Tighten screws of fan motor.
2. Loose screws on H.V.Transformer
Tighten screws of H.V.Transformer.
3. Shorted H.V.Diode
Replace H.V.Diode.
Oven stops operation during cooking
1. Open or loose wiring of primary
Adjust door and latch switches.
interlock switch
2. Operation of thermal cutout(Cavity)
Sparks
1. Metallic ware or cooking dishes
Inform the customer.
touching on the oven wall.
2. Ceramic ware trimmed with gold or
Do not use any type of cookware with
silver powder also causes sparks.
metallic trimming.
Uneven cooking
Uneven intensity of microwave due to
Wrap thinner parts of the food with
its characteristics.
aluminum foil.
Use plastic wrap or cover with a lid.
Stir once or twice while cooking
foods such as soup, cocoa, or milk.
6-2 Electrical Maltunction(continved)
