Samsung CE959G Service Manual page 14

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