Sharp R-216LS Procedure M Defrost Test, Procedure N Foil Pattern on the Printed Wiring Board Test

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R216LS

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. 12.5V D.C.

Oven lamp / Turntable motor / Cooling fan motor

 

RY2

 

 

Approx. 11.2V D.C.

Power transformer

 

8.If any abnormal condition is defected, replace the control unit.

9.Disconnect the power supply cord and then remove outer case. 10.Open the door and block it open.

11.Discharge high voltage capacitor.

12.Reconnect all leads removed from components during testing. 13.Re-install the outer case (cabinet).

14.Reconnect the power supply cord after the outer case is installed. 15.Run the oven and check all functions.

[14] Procedure M: DEFROST TEST

1.

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

 

 

 

2.

Close the door, touch the “DEFROST “ pad once.

 

 

 

 

 

 

3.

The oven is in Defrost cooking condition.

 

 

 

 

 

 

 

4.

The oven will operate as follows.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MENU

1ST STAGE

 

2ND STAGE

3RD STAGE

 

4TH STAGE

 

Steaks/

LEVEL

TIME

 

LEVEL

TIME

LEVEL

TIME

 

LEVEL

TIME

 

 

Chops

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.5lb

70%

1min 2sec.

 

0%

50sec.

50%

37sec.

 

30%

40sec.

 

5.

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

[15] Procedure N: FOIL PATTERN ON THE PRINTED WIRING BOARD TEST

To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse. 1. Foil pattern check and repairs.

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)Follow the troubleshooting guide given below for repair.

STEPS

OCCURRENCE

CAUSE OR CORRECTION

1

Only pattern at “a” is broken.

*Insert jumper wire J1 and solder.

2

Pattern at “a” and “b” are broken.

*Replace control unit.

5)Make a visual inspection of the varistor. Check for burned damage and examine the transformer with a tester for the presence of layer short-circuit (check the pri- mary coil resistance which is approximately 915Ω±10%). If any abnormal condition is detected, replace the control unit.

6)Reconnect all leads removed from components during testing.

1

RY2

RY1

VRS1

7)

Re-install the outer case (cabinet).

CN-

 

a

d

8)

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

A

 

 

 

c

b

9)

Run the oven and check all functions.

3

(J1)

 

 

 

2. Follow the troubleshooting guide given below, if indicator does not light up after

 

 

 

T1

 

above check and repairs are finished.

 

 

 

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.

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Contents Model R-216LS Microwave Measurement PRO Precautions for Using Lead Free SolderComponent Replacement Adjustment ProcedureBefore Servicing After repairing When the testing is completedBefore Servicing Leakage test Microwave Measurement ProcedurePreparation for testing RequirementsForeword Foreword and WarningDescription Product Description 1 SpecificationsOven Oven DiagramGeneral Information Grounding InstructionsTouch Control Panel OFF Condition Power Level CookingPower Output Reduction Description of Operating SequenceCooking Condition Schematic Door Closed Clock Appears on DisplayOven Schenatic Off ConditionDescription and Function of Components Troubleshooting Chart Troubleshooting GuideProcedure C High Voltage Rectifier Test Test ProceduresProcedure a Magnetron Assembly Test Procedure B Power Transformer TestProcedure F Primary Interlock System Test Procedure D High Voltage Capacitor TestProcedure E Temperature Fuse Oven Test Procedure F Secondary Interlock Switch TestProcedure H Blown Minitor Fuse Test Procedure G Monitor Switch TestPrimary Interlock Relay RY2 Control Unit Procedure I Noise Filter TestProcedure J Touch Control Panel Assembly Test Key UnitProcedure L Relay Test Procedure K KEY Unit TestProcedure N Foil Pattern on the Printed Wiring Board Test Procedure M Defrost TestR216LS Servicing for Touch Control Panel Touch Control Panel AssemblyPrecautions for Handling Electronic Components Outline of Touch Control PanelServicing Tools Other PrecautionsSoldering Precautions for Using LEAD-FREE SolderUsing lead-free wire solder Employing lead-free solderOuter Case Removal Component Replacement and Adjustment PROCE- DureMagnetron Removal Power Transformer RemovalPositive Lock Connector NO-CASE Type Removal ReinstallGraphic Sheet and Membrane Switch Replacement Control Panel Assembly RemovalTrol Panel Assembly Removal Turntable Motor Removal Power Supply Cord ReplacementCooling FAN Motor Removal Make Sure That the Axis of the Shaft is not Slanted InstallationAdjustment Make Sure That the FAN Blade Rotates Smooth After InstalledAfter adjustment, check the following Door ReplacementAfter any service, make sure of the following Sealer Film Figure C-7. Door ReplacementPictorial Diagram Figure DiagramsLiquid Crystal Display Control Panel Circuit Figure S-2Code Printed Wiring Board Figure S-3DIP UnitMeno Parts Guide Oven Parts Parts Code Price NEW Description Rank Mark Oven PartsDoor and Control Panel Parts Door and Control Panel Parts „INDEX

R-216LS specifications

The Sharp R-216LS is a versatile microwave oven that combines affordability with a range of features designed to enhance your cooking experience. Compact yet powerful, this model is especially suitable for small kitchens or dorm rooms, where space is at a premium.

One of the standout features of the Sharp R-216LS is its impressive 800 watts of cooking power. This ensures quick and efficient heating, allowing users to prepare meals in a fraction of the time compared to conventional ovens. The microwave also features a variety of power levels, providing flexibility for different types of cooking and reheating tasks, from defrosting frozen food to cooking delicate items like baked goods.

The R-216LS comes equipped with a spacious 20-liter capacity, which is surprisingly roomy for its size. This allows for ample space to heat up large dishes or multiple servings at once. The interior is designed with easy cleaning in mind, featuring a non-stick coating that prevents food from adhering to the surfaces and simplifies maintenance.

In terms of usability, the Sharp R-216LS boasts a user-friendly interface with straightforward knobs and buttons. It includes a timer and a range of pre-programmed cooking options, enabling users to cook a variety of foods with just the touch of a button. This is particularly beneficial for those new to microwave cooking or for busy individuals looking to save time.

The microwave also incorporates advanced technologies, including inverter microwave technology, which provides a continuous stream of cooking power for more even heating and defrosting. This ensures that your food is cooked thoroughly without the risk of hot and cold spots.

Safety is another priority in the design of the R-216LS. It features a child safety lock, which prevents accidental operation, making it a perfect choice for families with young children. The model also has an automatic shut-off feature, ensuring that the microwave turns off when not in use.

In summary, the Sharp R-216LS is a compact microwave that offers a blend of power, convenience, and safety features, making it an excellent choice for anyone seeking a reliable cooking appliance. Whether for reheating leftovers, cooking meals, or defrosting ingredients, this microwave is designed to meet the diverse needs of modern kitchens. With its combination of thoughtful design and functionality, the R-216LS stands out as a worthy investment for those looking for efficiency and performance in their cooking appliances.