To Next PageTo Next PageWhy is my Samsung MR7491G making a loud buzzing noise?
If your Samsung Microwave Oven is making a loud buzzing noise, it could be due to: * Loose fan and fan motor. * Loose screws on the H.V.Transformer. * Shorted H.V.Diode. Tighten the screws of the fan motor and H.V.Transformer. Replace the H.V.Diode.
General| Turntable | Yes |
|---|---|
| Cooking Presets | Yes |
| Sensor Cooking | Yes |
| Child Lock | Yes |
| Defrost Function | Yes |
| Color | Black |
| Warranty | 1 year |
Safety measures to prevent exposure to microwave energy during servicing.
Essential safety rules and procedures for technicians.
Critical safety rules for handling high voltage circuits.
Detailed technical specifications of the microwave oven.
Explanation of the microwave oven's control panel buttons and functions.
Identification of external features and physical layout of the oven.
Step-by-step guide for replacing key internal components.
Instructions for safely replacing the high voltage transformer.
Specific steps to remove Door "C" from the oven.
Specific steps to remove Door "E" from the oven.
Steps to remove the key door and spring mechanism.
Final checks and tests after door assembly reassembly.
Procedure for replacing the main fuse in the microwave.
Step-by-step guide to replace the drive motor.
Steps to remove the control box assembly.
Steps to remove the PCB assembly from the control box.
How to remove the window display and membrane panel.
Testing and checking the high voltage transformer.
Checking the low voltage transformer's resistance.
Continuity checks for the magnetron.
Procedure for checking the high voltage capacitor.
Steps to test the high voltage diode.
Checking the continuity of main and power control relays.
Adjusting critical safety switches for proper operation.
Method to measure magnetron output power via water test.
Checking heat distribution uniformity within the oven.
Detailed procedure for measuring microwave leakage.
Important notes and precautions for measurement accuracy.
Procedures for recording and notifying leakage test results.
Common electrical faults and their causes/corrections.
Further electrical malfunctions, causes, and corrections.
Visual representation of oven components with reference numbers.
Detailed list of main parts with part numbers and specifications.
Specific parts list for the oven door assembly.
List of parts related to the control panel and electronics.
Parts list for the body latch mechanism.
List of standard screws and common hardware.
Instructions for installing specific trim and duct components.
Schematic diagram of the main Printed Circuit Board (PCB).
Detailed list of components on the PCB.
Overall schematic diagram of the microwave oven circuitry.
