TEST PROCEDURES

R - 5 2 0 L K R-520LW

PROCEDURE

 

 

 

 

COMPONENT TEST

 

 

LETTER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G8

G7

G6

G5

G4

G3

G2

G1

 

 

G9

 

 

 

5

4

3

2

1

Pin

Pin

G10

POWER

FROZEN

 

 

9

8

7

6

BONE-IN

0

NO. G1

NO. G13

ROLLS/

LEVEL

POULTRY

 

 

MUFFINS

 

 

G11

KEEP WARM

GROUND

FRESH

STOP

CUSTOM

RICE

BAKED

START

 

Key unit ribbon cable

PLUS

MEAT

ROLLS/

CLEAR

HELP

POTATOES

MINUTEPLUS

 

(DEFROST)

MUFFINS

CHICKEN

 

 

 

FRESH

STEAKS/

FROZEN

 

 

MEAT

TIMER

 

 

G12

 

 

 

 

POPCORN

 

GROUND

 

 

 

VEGETABLES

CHOPS

ENTREES

 

BREAST

(SENSOR COOK)

CLOCK

 

 

G13

FISH

SENSOR

BONELESS

 

FROZEN

BEVERAGE

 

HOT

 

 

SEAFOOD

REHEAT

POULTRY

 

VEGETABLES

 

WATER

 

 

 

 

 

 

 

 

 

 

 

 

Key unit (Membrane Switch) front view

Key Unit

JRELAY TEST

1.Disconnect the power supply cord, and then remove outer case.

2.Open the door and block it open.

3.Discharge high voltage capacitor.

4.Disconnect the leads to the primary of the power transformer.

5.Ensure that these leads remain isolated from other components and oven chassis by using insulation tape.

6.After that procedure, re-connect the power supply cord.

7.Remove the outer case and check voltage between the normal open terminal of the relay RY1 and the normal open terminal of the relay RY2 on the control unit with an A.C. voltmeter.

The meter should indicate 120 volts, if not check oven circuit. RY1 and RY2 Relay Test

These relays are operated by D.C. voltage

Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.

DC. voltage indicated

Defective relay.

 

 

DC. voltage not indicated

Check diode which is connected to the relay coil. If diode is good,

 

 

control unit is defective.

 

 

 

 

 

RELAY SYMBOL

OPERATIONAL VOLTAGE

 

CONNECTED COMPONENTS

 

 

 

 

 

 

RY1

Approx. 12.0V D.C.

 

Oven lamp / Turntable motor / Cooling fan motor

 

 

 

 

 

 

RY2

Approx. 12.0V D.C.

 

Power transformer

 

 

 

 

 

 

8.Disconnect the power supply cord, and then remove outer case.

9.Open the door and block it open.

10.Discharge high voltage capacitor.

11.Reconnect all leads removed from components during testing.

12.Re-install the outer case (cabinet).

13.Reconnect the power supply cord after the outer case is installed.

14.Run the oven and check all functions.

KCOMPU DEFROST TEST

WARNING : The oven should be fully assembled before following procedure.

(1)

Open the door.

 

 

 

 

 

 

 

 

(2)

Place one cup of water in the center of the turntable tray in the oven cavity

(3) Touch the " Defrost " pad once.

 

 

 

 

 

 

(4)

Press "2", then press "5".

 

 

 

 

 

 

(5) Touch the "START " pad.

 

 

 

 

 

 

(6) The oven is in Defrost cooking condition.

 

 

 

 

(7) The oven will operate as follows

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MENU

1ST STAGE

2ND STAGE

3RD STAGE

 

 

 

STEAKS/CHOPS

LEVEL

 

TIME

LEVEL

TIME

LEVEL

TIME

 

 

 

0.5lb

60%

 

20sec.

40%

20sec.

30%

45sec.

 

(8)

If improper operation is indicated, the control unit is probably defective and should be checked.

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Sharp R-520LK, R-520LW Relay Test, Compu Defrost Test, Menu 1ST Stage 2ND Stage 3RD Stage STEAKS/CHOPS Level Time

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.