R - 5 2 0 L K

R-520LW

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WARNING AGAINST HIGH VOLTAGE:

Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the following parts may result in severe, possibly fatal, electric shock.

(Example)

High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..

WARNING: To Avoid possible exposure to microwave energy, please follow the instructions below before operating the oven.

1.Disconnect the power supply cord.

2.Make sure that a definite” click” can be heard when the microwave oven door is unlatched. (Hold the door in a closed position with one hand, then push the door open button with the other, this causes the latch leads to rise, it is then possible to hear a “click’ as the door switches operate.)

3.Visually check the door and cavity face plate for damage (dents, cracks, signs of arcing etc.).

Carry out any remedial work that is necessary before operating the oven.

Do not operate the oven if any of the following conditions exist:

1.Door does not close firmly.

2.Door hinge, support or latch hook is damaged.

3.The door gasket or seal is damaged.

4.The door is bent or warped.

5.There are defective parts in the door interlock system.

6.There are defective parts in the microwave generating and transmission assembly.

7.There is visible damage to the oven.

Do not operate the oven:

1.Without the RF gasket (Magnetron).

2.If the wave guide or oven cavity are not intact.

3.If the door is not closed.

4.If the outer case (cabinet) is not fitted.

WARNING FOR WIRING

To prevent an electric shock, take the following pre-

 

3) Sharp edge:

cautions:

 

Bottom plate, Oven cavity, Waveguide flange,

1.

Before wiring:

 

Chassis support and other metallic plate.

 

1)

Disconnect the power supply cord.

 

4) Movable parts (to prevent a fault):

 

2)

Open the door block it open.

 

Fan blade, Fan motor, Switch, Switch lever, Open

 

3)

Wait 60 seconds, then discharge the high voltage

 

button.

 

 

capacitor.

3.

Do not catch the wire leads in the outer case cabinet.

2.

Don’t let the wire leads touch to the following parts:

4.

Insert the positive lock connector until its pin is locked

 

1)

High voltage parts:

 

and make sure that the wire leads do not come off

 

 

Magnetron, High voltage transformer, High voltage

 

even if the wire leads are pulled.

 

 

capacitor and High voltage rectifier assembly.

5.

To prevent an error function, connect the wire leads

 

2)

Hot parts:

 

correctly, referring to the Pictorial Diagram.

 

 

Oven lamp, Magnetron, High voltage transformer and

 

 

 

 

Oven cavity.

 

 

Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any of the following removal procedures:

OUTER CASE REMOVAL

To remove the outer case, proceed as follows.

1.Disconnect the power supply cord.

2.Open the oven door and block it open.

3.Remove the two (2) screws from the lower portion of the rear cabinet using a T20H Torx type or GTXH20-100 screw driver.

4.Remove the remaining two (2) screws from rear.

5.Slide the entire outer case back out about 1 inch (3 cm) to free it from retaining clips on the cavity face plate.

6.Lift entire outer case from the unit.

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Sharp R-520LK, R-520LW service manual Component Replacement and Adjustment Procedure, Outer Case Removal
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R-520LK, R-520LW specifications

The Sharp R-520LW and R-520LK are innovative microwave ovens that combine advanced technology with user-friendly features to enhance cooking experiences. Designed with modern kitchens in mind, these models embody efficiency, precision, and versatility.

One of the defining characteristics of both the R-520LW and R-520LK is their powerful 900-watt output, which allows for speedy cooking and reheating. This high wattage ensures that food is cooked evenly and retains its moisture, preventing the common issue of dry or unevenly heated meals. Furthermore, the inclusion of multiple cooking power levels provides users with flexibility, making it easy to select the ideal setting for various types of food.

Both models feature Sharp's signature Inverter Technology. Unlike traditional microwaves that use a turn-on and turn-off cycling method, inverter technology delivers a steady stream of cooking power. This results in more consistent heating, allowing delicate foods such as fish or custards to be cooked perfectly without overcooking the edges. This technology not only enhances the quality of cooked food but also improves the overall efficiency of the microwave.

The R-520LW and R-520LK come equipped with a variety of auto-cook settings that cater to different culinary needs. From popcorn to frozen vegetables, these pre-programmed settings allow users to prepare meals with just a touch of a button, making cooking uncomplicated for all skill levels. The large, user-friendly control panel features intuitive buttons and a digital display, ensuring effortless operation and visibility.

In terms of design, the R-520LW boasts a sleek white finish, while the R-520LK offers a modern black aesthetic. Both models are compact yet spacious, with a generous interior capacity that can accommodate a range of dish sizes. The turntable feature further enhances cooking efficiency by ensuring even cooking all around.

Cleaning and maintaining the R-520LW and R-520LK is a breeze, thanks to their easy-to-wipe surfaces and the interior's cavity that can be easily accessed. The durable construction of these microwaves means they are designed to withstand the rigors of daily use.

In summary, the Sharp R-520LW and R-520LK microwave ovens stand out with their advanced features, such as inverter technology and pre-programmed cooking settings, making them excellent choices for anyone looking to streamline their kitchen tasks. Their stylish designs and user-friendly interfaces further enhance their appeal, making them valuable additions to any modern home.
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