To Next PageTo Next PageWhat to do if C/T fuse blows when plugging in my Sharp R-203FW Microwave Oven?
If the Sharp Microwave Oven becomes inoperative because of a blown C/T fuse when the power cord is plugged in, inspect the monitor switch, primary interlock relay (RY2), door sensing switch, and secondary interlock switch before replacing the C/T fuse.
What to do if C/T fuse blows when opening the door of Sharp R-203FW?
If the C/T fuse blows when the door of your Sharp Microwave Oven is opened, and you replace the C/T fuse, you must also replace the monitor switch. Use part FFS-BA027WRKZ as an assembly.
General| Type | Microwave Oven |
|---|---|
| Capacity | 20 Liters |
| Turntable | Yes |
| Turntable Diameter | 255 mm |
| Color | White |
| Power Output | 800W |
| Cooking Modes | Microwave |
| Defrost Modes | Yes |
Steps and safety checks to perform before servicing microwave ovens.
Warning about discharging high-voltage capacitors before servicing.
Overview of the microwave oven's features and capabilities.
General operational guidelines and electrical requirements for the oven.
Description of the oven's operational sequence and modes.
Procedures for diagnosing and testing oven faults.
Information and procedures related to the oven's touch control panel.
Detailed steps for replacing and adjusting oven components.
Schematics illustrating the oven's electrical connections.
List of all replacement parts for the microwave oven.
Layout and function of the oven's touch control interface.
Step-by-step explanation of how the oven operates.
Explanation of variable power level settings and their ON/OFF times.
Information on automatic power level adjustment for long cooking times.
Schematic diagram when the oven is in the off condition.
Schematic diagram when the oven is in the cooking condition.
How the door opens and the function of door sensing and interlock switches.
Role of the monitor switch in detecting interlock failures.
Function of the motor that rotates the turntable for even cooking.
Critical steps before replacing a blown C/T fuse and during troubleshooting.
Troubleshooting for issues when the oven is not operating.
Troubleshooting for issues during the cooking cycle.
Procedure to test the magnetron for proper function.
Procedure to test the power transformer for continuity and resistance.
Procedure to measure magnetron power output using a water temperature rise test.
Procedures for testing rectifier, capacitor, and temperature fuse.
Procedure to test the secondary interlock switch operation.
Tests for door sensing switch and primary interlock relay.
Procedure to test the monitor switch for proper operation.
Procedure for testing and replacing a blown C/T fuse.
Procedures for testing the touch control panel and key unit.
Procedure to determine if the key unit or control unit is faulty.
Function and operation of the touch control panel's key unit.
Functions of the control unit's various circuits.
Explanation of the key unit's matrix and signal flow.
Description of the control unit's circuits like reset, indicator, power source.
Safety measures for handling sensitive electronic parts like CMOS LSI.
Procedures for servicing the touch control panel with oven or external power.
Critical warnings about severe electrical shock hazard from high voltage parts.
Precautions to prevent electric shock and ensure correct wiring.
Step-by-step guide to safely remove the oven's outer case.
Procedure for safely removing the magnetron from the waveguide.
Procedure for removing high voltage capacitor and rectifier assembly.
Procedure for removing and reinstalling the power transformer.
Procedure for removing the oven's control panel assembly.
Steps for replacing the graphic sheet and membrane switch.
Procedure for removing and reinstalling the turntable motor.
Procedure for removing and installing the cooling fan motor.
Procedure for removing door switches and monitor switch.
Adjusting door switches and monitor switch for proper operation.
Procedure for disassembling and replacing the oven door panel.
Procedure for applying the sealer film to the door panel.
Part numbers and descriptions for electrical components.
Part numbers for cabinet, control panel, oven, and door components.
Lists for miscellaneous items and screws, nuts, and washers.
