To Next PageTo Next PageWhat to do if my Sharp R-21LTF Microwave Oven isn't heating food properly?
If your Sharp Microwave Oven appears to be running, but food is not heating or cooking properly, the heating element may need to be checked.
What to do if my Sharp R-21LTF is heating unevenly?
If your Sharp Microwave Oven is producing extremely uneven heating, investigate the load distribution inside the oven.
What to do if my Sharp Microwave Oven lamp doesn't turn off?
If the oven lamp in your Sharp Microwave Oven does not go out when the door is closed, check the door switch.
What to do if my Sharp R-21LTF Microwave Oven isn't cooking correctly on Cooking Power 5?
If your Sharp Microwave Oven is not cooking properly when programmed for Cooking Power 5 mode, check the Cooking Power settings.
What to do if the monitor fuse blows in my Sharp R-21LTF?
If the monitor fuse blows when you plug the power cord of your Sharp Microwave Oven into the wall receptacle, replace the monitor fuse.
What to do if fan and antenna motor in my Sharp R-21LTF Microwave Oven do not operate?
If the oven lamp lights in your Sharp Microwave Oven, but the fan motor and antenna motor do not operate, check the fan motor and antenna motor connections.
What to do if display on my Sharp R-21LTF doesn't appear?
If the display does not appear when you first plug your Sharp Microwave Oven into the wall outlet, check the power supply.
General| Control Type | Touch Control |
|---|---|
| Weight | 10.9 kg |
| Power Levels | 5 |
| Turntable Diameter | 255 mm |
| Cooking Modes | Microwave |
| Defrost Function | Yes |
| Child Lock | Yes |
Safety checks and procedures to perform before servicing the microwave oven.
Disconnect power, discharge capacitor, and remove outer case before servicing.
Steps to follow after testing, including reassembly and function checks.
Specifies limits for microwave leakage and interlock switch functions.
Detailed steps for performing a closed-door microwave leakage test.
Highlights high-voltage parts and warns against contact during servicing.
A chart mapping problems to possible causes and test procedures.
Tests the magnetron for open or shorted filament and output power.
Checks the primary and high voltage coil resistance of the power transformer.
Tests the high voltage rectifier for shorts or open circuits.
Checks the high voltage capacitor for shorts or open circuits.
Tests the thermal cut-outs for oven and magnetron for continuity.
Tests the secondary interlock switch for proper door open/closed operation.
Tests the door sensing switch and primary interlock relay.
Checks the monitor switch operation for proper door interlock.
Procedure for testing and replacing a blown monitor fuse.
Crucial safety warnings regarding high voltage and microwave exposure.
