Samsung Electronics
7-6
Troubleshooting
SYMPTOM
CAUSE
CORRECTIONS
Oven can program but timer
1. Open or loose wiring of primary
Adjust door and interlock switches.
does not start.
interlock switch
2. Off-alignment of primary interlock
3. Defective primary 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
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.
Turntable motor does not rotate.
1. Open or loose wiring of turntable motor.
Check the wire of turntable motor.
2. Defective turntable motor.
Replace turntable motor.
Fan motor does not rotate
1. Defective fan motor
Replace fan motor
2. Defective fan motor or ass'y PCB
Replace PCB main
Oven stops operation during cooking
1. Open or loose wiring of primary
Adjust door and latch switches.
interlock switch
2. Operation of thermal cutout(Magnetron)
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.
Noise from the turntable motor
Noise may result from the motor.
Replace turntable motor.
when it starts to operate.
Poor defrosting
1. Open or loose wiring of weight sensor
Check the connections to weight
sensor
2. Point not adjusted
Readjust the "0" point
7-4 Electrical Malfunction(continued)
