Sharp R-24AT Component Replacement and Adjustment Procedure, High Voltage Transformers Removal

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R-22AT

R-24AT

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

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

1.Disconnect the oven from power supply.

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 grip the door handle and the door lever assembly 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 dam- age (dents, cracks, signs of arcing etc.).

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.

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

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

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.

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

WARNING FOR WIRING

To prevent an electric shock, take the following

 

and Oven cavity.

precautions.

 

3) Sharp edge:

1. Before wiring,

 

Bottom plate, Oven cavity, Waveguide flange,

1)

Disconnect the power supply cord.

 

Chassis support and other metallic plate.

2)

Open the door and block it open.

 

4) Movable parts (to prevent a fault)

3)

Discharge the two high voltage capacitors and

 

Blower fan blade, Blower fan motor, Switches,

 

wait for 60 seconds.

 

Switch levers, Antenna motors and Sirrer anten-

2. Don’t let the wire leads touch to the followiong parts;

 

nas.

1)

High voltage parts:

3.

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

 

Magnetron, High voltage transformer, High volt-

4.

Insert the positive lock connector until its pin is locked

 

age capacitor, High voltage rectifier assembly and

 

and make sure that the wire leads do not come off

 

High voltage fuse.

 

even if the wire leads are pulled.

2)

Hot parts:

5.

To prevent an error function, connect the wire leads

 

Oven lamp, Magnetron, High voltage transformer,

 

correctly, referring to the Pictorial Diagram.

OUTER CASE, REAR CABINET AND POWER SUPPLY CORD REMOVAL

To remove the components, procedure as follows.

1.Disconnect oven from power supply.

2.Open the oven door and wedge it open.

3.Remove the screws from the rear and along side the edge of the outer case.

4.Slide the case back about 1 inch (3 cm) to free it from the oven cavity.

5.Lift entire case from the unit.

6.DISCHARGE TWO HIGH VOLTAGE CAPACITORS BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.

7.Now, outer case is free.

N.B.; Step 1,2 and 9 form the basis of the 3D checks.

CAUTION:DISCHARGE TWO HIGH VOLTAGE CA- PACITORS BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.

To remove rear cabinet and power supply cord:

8.Disconnect the power supply cord from the noise filter.

9.Remove the one (1) screws holding the grounding wire of power supply cord to the oven cavity.

10.Remove the screws holding the rear cabinet to the oven cavity and blower motor.

11.Remove the rear cabinet with the power supply cord from the oven cavity.

12.Loosen the tab of the cord bushing, and remove the power supply cord with the cord bushing from the rear cabinet.

13.Remove the cord bushing from the power supply cord, 14.Now, the power supply cord and rear cabinet are free.

HIGH VOLTAGE TRANSFORMER(S) REMOVAL

1.CARRY OUT 3D CHECKS.

2.Remove the rear cabinet, too.

3.Disconnect wire lead(s) of high voltage transformer(s)

from magnetron(s).

4.Remove the wire lead(s) of high voltage transformer(s) from the wire holder.

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Contents Table of Contents Commercial Microwave OvenRemember to Check 3D Remember to Check 4R22AT/ R-24AT Sharp Corporation OSAKA, JapanCommercial Microwave Oven General Important InformationThis Appliance Must be Earthed SpecificationDescription Brown LiveAppearance View Installation InformationDisplay and Indicators Auto Touch Control PanelMicrowave Cooking Condition Operation SequenceIdle Condition Microwave Variable CookingTWO Magnetron Operation System Figure B-1. High Voltage CircuitFunction of Important Components Troubleshooting Guide Possible Cause and Defective Parts EEP ROM KEY Unit Touch Control Transformer T3Microwave Output Power 1 litre water load Test ProceduresProcedure Letter Component Test Magnetron Test Microwave Output Power 2000 cc alternative method Test Procedures Letter Component TestPower Carry OUT 4R Checks High Voltage Rectifier Assembly Test Carry OUT 3D ChecksSwitch Test Carry OUT 4R ChecksWeak Point F3 Test Carry OUT 3D Checks Procedure Letter Component TestTemperature Fuse TF1, TF2, TF3 Test Fuse F1, F2 F10A Test Carry OUT 3D ChecksNoise Filter Test Touch Control Panel Assembly TestMotor Winding Test High Voltage Fuse F4, F5 Test Carry OUT 3D ChecksRY1 KEY Unit TestRelay Test RY3Occurrence Cause or Correction Touch Control Panel Assembly Description of LSI LSIIXA222DRInternal clock oscillation frequency setting input Signal to sound buzzerSignal synchronized with commercial power source frequency Power source voltageSound Voltage level control terminal Digit selection signalKey strobe signal Servicing of Touch Control Panel ServicingShapes of Electronic Components PAD Order Display Phone Other PrecautionsServicing Tools Defrost Procedure for Entering toOther Checking and Clearing PROCE- Dure for Using lead-free wire solder Precautions for Using LEAD-FREE SolderSET Number Double Quantity Check Signal Employing lead-free solderHigh Voltage Transformers Removal Component Replacement and Adjustment ProcedureOuter CASE, Rear Cabinet and Power Supply Cord Removal Magnetrons Removal Magnetron Thermistor ReplacementRe-install RemovalBlower Motor Removal HOW to Release the Positive Lock ConnectorTerminal Insulator Replacement Stirrer Motors Upper and Lower RemovalControl Panel Assembly Removal Control Panel Assembly and Control Unit RemovalPower Supply Cord Replacement HOW to Attach Membrane Switch and Graphic SheetRemoval Door Replacement and AdjustmentAfter adjustment, make sure of the following Door Components Removal Door DisassemblyChoke Cover Removal Door Case Removal Service InformationUpper and Lower Latch Heads Removal Door Glass RemovalPreparation ProcedureMicrowave Measurement Figure O-1 Oven Schematic-OFF Condition Figure O-3 Oven Schematic-Cooking Condition Figure S-1. Pictrorial Diagram PanelCircuit DG1Figure S-3. Printed Wiring Board Electoric Parts Parts ListParts marked * are used in voltage more than Cabinet PartsOven Parts RH-IXA222DRZZ LSI RH-IXA298DRZZ EepromSCRE,NUTS and Washers Door PartsMiscellaneous Model Number 2. REF. no Description HOW to Order Replacement PartsPacking and Accessories Oven and Cabinet Parts Control Panel Parts Door Parts Miscellaneous
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R-22AT, R-24AT specifications

The Sharp R-24AT and R-22AT microwave ovens are advanced kitchen appliances designed to enhance cooking convenience, efficiency, and versatility. Both models incorporate innovative technologies and features that cater to modern cooking needs.

The Sharp R-24AT boasts a robust 900 watts of cooking power, enabling users to prepare a wide variety of meals quickly and effectively. Its spacious 24-liter capacity is suitable for families and those who enjoy entertaining. One of the standout features of the R-24AT is its intelligent sensor technology, which automatically detects humidity levels in the cooking food. This innovative feature ensures optimal cooking times and temperatures, resulting in perfectly cooked dishes without the guesswork.

Another key technology in the R-24AT is the inverter cooking system. This system provides a seamless flow of power throughout the cooking process, allowing for more precise temperature control. Unlike traditional microwaves that operate in full power or off, inverter technology ensures consistent heat, which is particularly beneficial for tasks such as defrosting, reheating, and simmering.

The Sharp R-22AT, while slightly more compact with a 22-liter capacity, also delivers impressive performance with 800 watts of power. It features a similar inverter cooking system that guarantees even cooking results. Both models come with multiple auto-cook presets, providing users with a selection of quick options for common dishes such as popcorn, pizza, and oatmeal. This feature streamlines meal preparation and reduces the time spent on planning meals.

In addition, the user-friendly control panel on both models includes a combination of push-button and rotary dial controls for easy navigation. The inclusion of a bright LED display further enhances usability, allowing cooks to monitor cooking times and settings easily.

Safety is another critical aspect of the Sharp R-24AT and R-22AT. Both models come equipped with a child lock feature, ensuring peace of mind in homes with young children. The stainless steel interiors of these microwaves facilitate easy cleaning, while their sleek design adds a modern touch to any kitchen.

In summary, the Sharp R-24AT and R-22AT microwave ovens stand out for their advanced cooking technologies, user-friendly features, and thoughtful design. They empower home cooks to prepare meals with precision and ease, making them a valuable addition to any kitchen.
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