What to do if my Samsung CM1929 has no display and the fuse is blown?
If your Samsung Microwave Oven has no display and isn't working, and the fuse is blown, the cause might be a shorted lead wire harness, a defective primary latch switch, a defective monitor switch, a shorted H.V.Capacitor, or a shorted H.V.Transformer. Check the adjustment of the primary, interlock monitor, power relay, and door sensing switch.
Why Samsung CM1929 stirrer does not rotate?
If the drive motor in your Samsung Microwave Oven isn't working (the Ass’y stirrer doesn't rotate), it could be due to an open or loose wiring of the turntable motor, a defective turntable motor, or a defective ass’y stirrer. Check the wire of the drive motor. Replace the drive motor or the ass’y stirrer.
Why Samsung CM1929 does not accept key input?
If your Samsung Microwave Oven does not accept key inputs for programming (CM1929/1629/1329 models), it could be because the key input is not in sequence, there's an open or loose connection of the membrane keypad to the Ass’y PCB, the membrane panel is shorted or open, or the Ass’y PCB is defective. Refer to the operation procedure and replace the PCB main.
What to do if Samsung CM1929 timer counts down but no heat?
If your Samsung Microwave Oven's timer starts counting down but there's no microwave oscillation (no heat, but the oven lamp and fan motor turn on), it could be due to an open or loose connection in the high voltage circuit, especially the magnetron filament circuit, or defective high voltage components like the H.V. Transformer, H.V. Capacitor, H.V. Diode, H.V. Fuse, or Magnetron. Adjust the door and latch switches. Check the high voltage components according to the component test procedure and replace them if defective.
Why Samsung CM1929 Microwave Oven can program but timer does not start?
If your Samsung Microwave Oven can be programmed, but the timer doesn't start, it could be due to defective circuitry in the Start function of the Main P.C.B Ass’y or loose lead wires. Check the circuitry of the Start function of the Main P.C.B Ass’y and replace it if defective. Adjust or repair any loose wires.
Why won't the timer start on my Samsung CM1929 Microwave Oven?
If your Samsung Microwave Oven can be programmed but the timer doesn't start, it's due to defective circuitry of the Start function of the Main P.C.B Ass’y or loose lead wires. Check the circuitry of the Start function of the Main P.C.B Ass’y and replace if defective. Adjust or repair loose wires.
How to fix uneven cooking in Samsung Microwave Oven?
Uneven cooking in your Samsung Microwave Oven can be due to the uneven intensity of microwave radiation. 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.
Why isn't the turntable rotating in my Samsung Microwave Oven?
If the drive motor in your Samsung Microwave Oven isn't working and the stirrer isn't rotating, it could be due to an open or loose wiring of the turntable motor, a defective turntable motor, or a defective ass’y stirrer. Check the wire of the drive motor, and replace the drive motor or ass’y stirrer if necessary.
Why does my Samsung CM1929 Microwave Oven stop in the middle of cooking?
If your Samsung Microwave Oven stops during cooking, this could be due to the operation of the thermal cutout (Magnetron or Cavity) or a fan motor that isn't rotating. Adjust the door and latch switches and replace the fan motor.
Why is my Samsung Microwave Oven cooking slowly?
If your Samsung Microwave Oven's output is low, and it takes longer to cook food (with the oven lamp and ventilation working), it could be due to a decrease in power source voltage, an open or loose wiring of the magnetron filament circuit, aging of the magnetron, or defective high voltage components such as the H.V. Transformer, H.V. Capacitor, H.V. Diode, H.V. Fuse Magnetron. Consult an electrician to check the power source voltage. Also, check the high voltage components according to the component test procedure and replace if defective.
General| Microwave power | 1850 W |
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Safety precautions for servicing to avoid possible exposure to microwave energy.
General safety measures and compliance with Federal Performance Standard 21 CFR.
Warnings and procedures for handling high voltage components and capacitors.
Step-by-step guide for replacing magnetron, motor, and lamp components.
Procedure for safely removing and replacing the high voltage transformer.
Procedure for safely replacing the high voltage capacitor.
Checking continuity and resistance of the high voltage transformer.
Continuity checks to diagnose open filament or shorted magnetron.
Method for measuring magnetron output power using a water temperature rise test.
Steps for measuring microwave leakage using a survey meter.
Common electrical issues, causes, and correction steps for the microwave oven.
Table of error codes, their causes, and corresponding correction procedures.
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