Sharp R-520LK Oven Lamp and Lamp Socket Removal, Positive Lock Connector NO-CASE Type Removal

Page 31

R - 5 2 0 L K

R-520LW

OVEN LAMP AND LAMP SOCKET REMOVAL

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

2.Open the door and block it open.

3.Discharge high voltage capacitor.

4.Remove the oven lamp from the oven lamp socket.

5.Pull the wire leads from the oven lamp socket by pushing the terminal hole of the oven lamp socket with the small flat type screw driver.

6.Remove the oven lamp socket from the magnetron duct by turning the socket counterclockwise.

7.Remove the oven lamp from the socket by turning the oven lamp.

8.Now, the oven lamp and the oven lamp socket are

Terminal

Oven lamp

 

socket

POSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVAL

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.Push the lever of positive lock® connector.

5.Pull down on the positive lock® connector.

CAUTION: When connecting the positive lock® connectors to the terminals, CON- NECT the positive lock® so that the lever faces you.

Figure C-2. Positive lock® connector

CONTROL PANEL ASSEMBLY REMOVAL

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 wire leads from panel components.

5.Remove the one (1) screw holding the control panel assembly to the oven cavity front plate.

6.Slide the control panel assembly upward and remove it.

7.Now, individual components can be removed.

NOTE: 1. Before attaching a new key unit, wipe off remaining adhesive on the control panel frame surfaces completely with a soft cloth soaked in alcohol.

2.When attaching the key unit to the control panel frame, adjust the upper edge and right edge of the key unit to the correct position of control panel frame.

3.Place the key unit firmly to the control panel frame by rubbing with soft cloth not to scratch.

GRAPHIC SHEET AND MEMBRANE SWITCH REPLACEMENT

Removal

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.Remove the control panel assembly, referring to chapter of CONTROL PANEL ASSEMBLY REMOVAL.

5.Remove the three (3) screws holding the control unit to the control panel frame. And remove the control unit by releasing from tabs.

6.Remove the rubber connector from the long slit on the control panel frame.

7.Remove the night light cover (release tabs from back side).

8.Remove the graphic sheet from the control panel frame. (*See special note)

9.Remove away the membrane switch from the control panel frame. (*See special note)

31

Image 31
Contents 520LW Table of ContentsBefore Servicing Dont Touch Before Servicing When the testing is completedRequirements Microwave Measurement ProcedureLeakage test Foreword Sharp PLAZA, MahwahMicrowave Ovens 520LK/R-520LWGrounding Instructions SpecificationGeneral Information DescriptionTouch Control Panel Oven DiagramOFF Condition Power Level P-0 to P-90 CookingOperation Description of Operating SequenceMicrowave Sensor Cooking ConditionClock Appears on Display SchematicDescription and Function of Components Troubleshooting Guide Procedure Component Test Letter Magnetron Assembly Test Test ProceduresTest Procedure ProblemMicrowave Output Power Procedure Component Test LetterPower Transformer Test High Voltage Capacitor Test Procedure Component Test Letter High Voltage Rectifier TestCavity Temperature Fuse Test Magnetron Temperature Fuse TestSecondary Interlock System Test Replace Temperature FusePrimary Interlock Switch Test Run the oven and check all functionsTouch Control Panel Assembly Test Procedure Component Test Letter Monitor Switch TestKEY Unit Test Figure of all digits flickerCompu Defrost Test Relay TestMenu 1ST Stage 2ND Stage 3RD Stage STEAKS/CHOPS Level Time Steps Occurrence Cause or Correction Primary on the PWB, this foil pattern acts as a fuseAH Sensor Test Testing Method for AH Sensor AND/OR Control UnitChecking the initial sensor cooking condition R1, R2 22Ω ± 1% 1/2W R3 4.3Ω ± 5% 1/4W R4 1MΩ ± 5% 1/4W Checking Control UnitSensor Dummy Resistor Circuit Synchronizing Signal Circuit Reset CircuitIndicator Circuit Power Source CircuitLSI Description of LSIKey strobe signal Signal similar to ANI3Internal clock oscillation frequency control input setting Power source voltageConverter power source voltage Converter power source voltage GND0VCommon data signal Detector Circuit of Absolute Humidity Sensor Circuit Absolute Humidity Sensor CircuitStructure of Absolute Humidity Sensor Operational Principle of Absolute Humidity SensorServicing Tools Other PrecautionsTouch Control Panel Servicing Servicing of Touch Control PanelOuter Case Removal Component Replacement and Adjustment ProcedureTo prevent an electric shock, take the following pre Magnetron Removal Power Transformer RemovalRe-install High Voltage Rectifier and High Voltage Capacitor RemovalOven Lamp and Lamp Socket Removal Positive Lock Connector NO-CASE Type RemovalControl Panel Assembly Removal Graphic Sheet and Membrane Switch ReplacementTurntable Motor Removal InstallationRear View InstallationCooling FAN Motor Removal RemovalAfter adjustment, check the following Door ReplacementAfter any service, make sure of the following RE-INSTALLSealer Film High Voltage Components DiagramCircuit Control Unit Figure S-5 . Printed Wiring Board of Power Unit Parts List Model Number HOW to Order Replacement PartsMiscellaneous SCREWS,NUTS and WashersOven and Cabinet Parts Control Panel Parts Door Parts Miscellaneous Packing and Accessories Copyright 2006 by Sharp Corporation ALL Rights Reserved

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.