Sharp R-210A Servicing, Troubleshooting Guide, Remember to Check 3D, Remember to Check 4R

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R-210A

Note: The ON/OFF time ratio does not exactly corre- spond to the percentage of microwave power,

because approx. 2 seconds are needed for heat- ing up the magnetron filament.

SERVICING

WARNING TO SERVICE PERSONNEL

Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with following parts will result in electrocution.

High voltage capacitor, Power transformer, Magnetron, High voltage rectifier assembly, High voltage Fuse, High voltage harness.

REMEMBER TO CHECK 3D

1)Disconnect the supply.

2)Door opened, and wedged open.

3)Discharge high voltage capacitor.

WARNING AGAINST THE CHARGE OF THE

HIGH-VOLTAGE CAPACITOR

The high-voltage capacitor remains charged about 60 seconds after the oven has been switched off. Wait for 60 seconds and then short- circuit the connection of the high-voltage capaci- tor (that is, of the connecting lead of the high- voltage rectifier) against the chassis with the use of an insulated screwdriver.

Sharp recommend that wherever possible fault-finding is carried out with the supply disconnected. It may in, some cases, be necessary to connect the supply after the outer case has been removed, in this event carry out 3D checks and then disconnect the leads to the primary of the power transformer. Ensure that these leads remain isolated from other components and the oven chassis. (Use insulation tape if necessary.) When the testing is completed carry out 3D checks and reconnect the leads to the primary of the power transformer.

REMEMBER TO CHECK 4R

1)Reconnect all leads removed from components during testing.

2)Replace the outer case (cabinet).

3)Reconnect the supply.

4)Run the oven. Check all functions.

Microwave ovens should not be run empty. To test for the presence of microwave energy within a cavity, place a cup of cold water on the oven turntable, close the door and set the power level to HIGH. And set the microwave timer for two (2) minutes. When the two minutes has elapsed (timer at zero) carefully check that the water is now hot. If the water remains cold carry out 3D checks and re-examine the connections to the component being tested.

When all service work is completed and the oven is fully assembled, the microwave power output should be checked and microwave leakage test should be carried out.

TROUBLESHOOTING GUIDE

When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure letter which will be found in the "Test Procedure "section.

IMPORTANT: If the oven becomes inoperative because of a blown fuse 13A in the 1st. latch switch - 2nd. latch switch

-monitor switch circuit, check the 1st. latch switch, 2nd. latch switch and monitor switch before replacing the fuse 13A.

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Contents Table of Contents Model R-210A210A Sharp Corporation OSAKA, Japan Microwave Oven210A General Important InformationMedium LOW/ Defrost SpecificationThis Appliance Must be Earthed Appearance View Control PanelOperation Sequence OFF ConditionMicrowave Cooking Condition Medium HIGH, MEDIUM, Medium LOW, LOW CookingFunction of Important Components Troubleshooting Guide ServicingRemember to Check 3D Remember to Check 4RTroubleshooting Chart Test Procedure Possible Cause Defective PartsProblem C D E E E F F I I I G G HJ KTest Procedures Letter Component Test Magnetron Test Microwave Output Power IECΔT1 Test Procedures Component Test LetterMicrowave Output Power 2 Litre water load Test Procedures Letter Component Test Power Transformer TestCarry OUT 4R Checks High Voltage Rectifier Test Carry OUT 3D ChecksSwitch Test Temperature Fuse or Thermal CUT-OUT TestMotor Winding Test Carry OUT 3D Checks Fuse 13ATimer Motor with VARI-SWITCH Test Timer SWITCH- ContactsTimer Motor Noise Filter Test Carry OUT 3D ChecksComponent Replacement and Adjustment Procedure Power Transformer RemovalOuter Case Removal To prevent an electric shock, take the followingMagnetron Replacement Positive Lock Connector RemovalRe-install Oven Lamp Socket RemovalPower Supply Cord Replacement Turntable Motor ReplacementFAN Motor Replacement RemovalControl Panel Assembly and Switch Lever Removal InstallationControl Panel Assembly and Switch LE- VER Removal Rear ViewRE-INSTALL Door ReplacementAfter adjustment, make sure of the following Installation Sealer FilmPreparation for Testing Microwave MeasurementRequirement Holaday HI Simpson 380MOven Schematic-ON Condition Oven Schematic-OFF ConditionFigure S-1. Pictorial Diagram High Voltage ComponentsElectric Parts Cabinet PartsControl Panel Parts Oven PartsInterchangeability↔ Packing and AccessoriesSCREWS,NUTS and Washers Oven and Cabinet Parts Control Panel Parts Door Parts Miscellaneous 210A

R-210A specifications

The Sharp R-210A is a notable microwave oven that stands out in the crowded kitchen appliance market. Renowned for its practicality and efficiency, this model is designed to cater to the needs of modern households while offering an array of advanced features.

One of the key highlights of the Sharp R-210A is its powerful 1000 watts of cooking power, which ensures quick cooking and reheating. With a range of cooking options, this microwave can handle various tasks from defrosting frozen foods to cooking meals evenly and efficiently. The unit boasts a 22-liter capacity, making it suitable for small to medium-sized kitchens. Its compact design allows for easy integration into different kitchen layouts without taking up excessive counter space.

The Sharp R-210A employs innovative technology to enhance cooking performance. It features a turntable system that ensures food is cooked uniformly by rotating dishes during the cooking cycle. This feature is particularly advantageous when heating large or unevenly shaped food items, as it helps prevent cold spots. Additionally, the microwave includes a convection option, bringing versatility to food preparation by combining microwave energy with convection heat to produce crispy results akin to traditional ovens.

User-friendliness is a hallmark of the Sharp R-210A, with an intuitive control panel that simplifies operation. The keypad is designed for easy navigation, allowing users to select cooking times and power levels quickly. It also includes pre-programmed settings for popular dishes, making meal preparation even more straightforward. The microwave features a timer and clock function, providing added convenience.

Safety is a crucial consideration in microwave design, and the Sharp R-210A does not disappoint. It comes equipped with a child lock feature to prevent accidental operation, making it a suitable choice for families. The unit also has an automatic shut-off feature that activates after cooking, reducing the risk of overheating or burning food.

In summary, the Sharp R-210A microwave oven combines robust power, innovative technology, and user-friendly features. With its ample capacity, intuitive controls, and safety measures, it continues to be a reliable choice for those looking to simplify their cooking experiences in the kitchen. Whether you're reheating leftovers or preparing a full meal, the Sharp R-210A is equipped to meet various culinary needs with ease and efficiency.
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