R - 5 2 0 L K

R-520LW

SCHEMATIC

NOTE: CONDITION OF OVEN

1.Door Closed

2.CLOCK APPEARS ON DISPLAY

Note:* Indicates component

BLK

 

H

 

GRN

 

120VAC GND

 

60Hz

 

N

R2

WHT

 

MONITOR FUSE (20A) "TO SOURCE"

C1

"TO SOURCE"

CAVITY

 

MAGNETRON

 

 

 

 

 

 

 

 

 

TEMPERATURE

 

TEMPERATURE

ORG

 

 

 

 

 

 

 

 

FUSE

RED

FUSE

ORG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BRN ORG

 

 

RED

 

 

 

 

 

 

 

 

 

 

RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N.O.

 

 

COM.

 

GRN

 

 

 

 

 

 

 

 

 

GRN

 

 

 

 

 

 

 

 

 

 

B2

GRN

 

 

 

 

 

 

 

 

 

 

GRN

 

 

 

RED

 

 

 

 

 

 

 

DOOR

 

 

 

 

 

 

 

 

 

 

SENSING

 

 

POWER

 

 

 

 

 

 

 

 

SWITCH

 

 

TRANSFORMER

LOAD""TO

 

 

 

 

 

 

PNK

 

RED

RED

 

 

 

 

 

 

 

 

B1

HUMIDITY

 

 

 

 

 

 

 

 

(RY2)

 

SENSOR

 

 

 

 

 

 

 

 

 

F3

 

 

 

 

 

 

 

SECONDARY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERLOCK

 

 

 

 

 

 

 

 

 

 

 

RELAY

 

F2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C2

N.O.

(RY1)

COM.

CONTROL UNIT

 

F1

 

 

 

HIGH

 

 

 

 

 

 

 

 

 

 

 

OVEN

 

 

 

 

 

 

 

VOLTAGE

 

 

 

 

 

 

 

 

 

 

 

 

LAMP

 

 

 

 

 

 

 

 

CAPACITOR

 

 

RELAY

 

 

 

 

 

 

 

 

xx μF

C3

 

 

ORG

 

BRN

 

ORG ORG

 

 

 

 

 

 

 

 

 

MONITOR

N.C.

 

 

 

 

 

 

 

 

TURN

 

SWITCH

 

HIGH

 

 

 

 

 

 

 

 

 

 

 

 

OL

OVEN

 

FM

FAN

 

WHT WHT

 

 

WHT

TTM

TABLE

 

VOLTAGE

 

 

 

LAMP

 

MOTOR

MOTOR

 

RECTIFIER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOISE

 

 

GRY

 

WHT

 

WHT

 

COM.

 

 

 

 

 

 

WHT WHT

 

 

 

LOAD""TO

 

 

 

 

 

 

 

FILTER

 

 

 

 

 

 

 

 

 

 

 

GRY

 

 

 

COM.

N.O.

 

 

 

 

 

 

MAGNETRON

 

 

 

 

GRY

 

WHT

 

 

 

 

WHT

PRIMARY

WHT

NOTES:

INTERLOCK

 

SWITCH

 

1.CIRCUITS SUBJECT TO CHANGE WITHOUT NOTICE.

 

 

2.TERMINAL WITH PROJECTION OR OPPOSITE BLUE MARK ON LAMP SOCKET MUST BE CONNECTED TO NEUTRAL WIRE.

3.ONLY CERTAIN MODELS USE THE ABSOLUTE HUMIDITY SENSOR.

4.POWER TRANSFORMER TOP (FINISH LEAD) TERMINAL MUST BE CONNECTED TO THE NEUTRAL (WHT) WIRE.

Figure O-1 Oven Schematic - Off Condition

SCHEMATIC

NOTE: CONDITION OF OVEN

1.DOOR CLOSED

2.COOKING TIME PROGRAMMED

3.VARIABLE COOKING CONTROL "HIGH"

4."START" PAD TOUCHED

BLK

 

H

 

GRN

 

120VAC GND

 

60Hz

 

N

R2

WHT

 

MONITOR FUSE (20A) "TO SOURCE"

C1

"TO SOURCE"

CAVITY

 

MAGNETRON

 

 

 

 

 

 

 

 

 

TEMPERATURE

 

TEMPERATURE

ORG

 

 

 

 

 

 

 

 

FUSE

RED

FUSE

ORG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BRN ORG

 

 

RED

 

 

 

 

 

 

 

 

 

 

RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N.O.

 

 

COM.

 

GRN

 

 

 

 

 

 

 

 

 

GRN

 

 

 

 

 

 

 

 

 

 

B2

GRN

 

 

 

 

 

 

 

 

 

 

GRN

 

 

 

RED

 

 

 

 

 

 

 

DOOR

 

 

 

 

 

 

 

 

 

 

SENSING

 

 

POWER

 

 

 

 

 

 

 

 

SWITCH

 

 

TRANSFORMER

LOAD""TO

 

 

 

 

 

 

PNK

 

RED

RED

 

 

 

 

 

 

 

 

B1

HUMIDITY

 

 

 

 

 

 

 

 

(RY2)

 

SENSOR

 

 

 

 

 

 

 

 

 

F3

 

 

 

 

 

 

 

SECONDARY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERLOCK

 

 

 

 

 

 

 

 

 

 

 

RELAY

 

F2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C2

N.O.

(RY1)

COM.

CONTROL UNIT

 

F1

 

 

 

HIGH

 

 

 

 

 

 

 

 

 

 

 

OVEN

 

 

 

 

 

 

 

VOLTAGE

 

 

 

 

 

 

 

 

 

 

 

 

LAMP

 

 

 

 

 

 

 

 

CAPACITOR

 

 

RELAY

 

 

 

 

 

 

 

 

xx μF

C3

 

 

ORG

 

BRN

 

ORG ORG

 

 

 

 

 

 

 

 

 

MONITOR

N.C.

 

 

 

 

 

 

 

 

TURN

 

SWITCH

 

HIGH

 

 

 

 

 

 

 

 

 

 

 

 

OL

OVEN

 

FM

FAN

 

WHT WHT

 

 

WHT

TTM

TABLE

 

VOLTAGE

 

 

 

LAMP

 

MOTOR

MOTOR

 

RECTIFIER

 

 

 

 

 

 

 

NOISE

 

 

GRY

 

WHT

 

WHT

 

COM.

 

 

 

 

 

 

WHT WHT

 

 

 

LOAD""TO

 

 

 

 

 

 

 

FILTER

 

 

 

 

 

 

 

 

 

 

 

GRY

 

 

 

COM.

N.O.

 

 

 

 

 

 

MAGNETRON

 

 

 

 

GRY

 

WHT

 

 

 

 

WHT

PRIMARY

WHT

NOTES:

INTERLOCK

 

SWITCH

 

1.CIRCUITS SUBJECT TO CHANGE WITHOUT NOTICE.

 

 

2.TERMINAL WITH PROJECTION OR OPPOSITE BLUE MARK ON LAMP SOCKET MUST BE CONNECTED TO NEUTRAL WIRE.

3.ONLY CERTAIN MODELS USE THE ABSOLUTE HUMIDITY SENSOR.

4.POWER TRANSFORMER TOP (FINISH LEAD) TERMINAL MUST BE CONNECTED TO THE NEUTRAL (WHT) WIRE.

Figure O-2 Oven Schematic - Cooking Condition

10

Page 10
Image 10
Sharp R-520LW, R-520LK service manual Schematic, Clock Appears on Display

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.