Sharp R-22AT Control Panel Assembly and Control Unit Removal, Power Supply Cord Replacement

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R-22AT R-24AT

Installation

1. Insert the receptacle into terminal insulator.

Terminal

Flat type

screw driver

insulator

 

2.Close covers of the terminal insulator, as shown illustlated below.

COVERS

RECEPTACLE

CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL

CONTROL PANEL ASSEMBLY REMOVAL

The complete control panel should be removed for re- placement of components. To remove the control panel, proceed as follows:

1.Disconnect the oven from power supply.

2.Wait for 60 seconds to discharge the high voltage capacitor.

3.Remove the air intake filter assembly from the base plate.

4.Remove two (2) screws holding the control panel to the base plate.

5.Pull down the control panel and remove it forward.

6.Disconnect connectors and wire leads from the control unit.

7.Now the control panel assembly is free.

CAUTION FOR TOUCH CONTROL PANEL REMOVAL

1)Hold the lower end (Position A, Fig. 1) of the touch control panel assembly firmly while sliding it down and toward you.

2)If the Touch Control Panel is hard to remove;

(1)Insert a flat head screw driver into space B . (Fig. 1)

(2)Rotate the screwdriver clockwise while holding posi- tion C of the Touch Control Panel. (Fig. 2)

TO AVOID DAMAGE TO TOUCH CONTROL PANEL, COVER THE TIP OF SCREWDRIVER WITH TAPE.

Fig. 1

Fig. 2

B

B

Replacement of individual component is as follows:

CONTROL UNIT AND CONTROL PANEL FRAME (WITH KEY)

8.Remove three (3) screws holding the control panel mounting angle to the panel frame.

9.Lift up the control panel mounting angle from the panel frame.

10.Disconnect connector (G) from the control unit by pushing the hooks of cable holder inwardly.

11.Remove four (4) screws holding the control unit to the panel frame assembly.

12.Now, the control unit and control panel frame (with key) are free.

CAUTION:

At installing control panel unit assembly to main body set:

1.Ensure the installation of wiring-related parts without negligence.

2.When inserting key cable to main body set, ensure them free from caught-in trouble. In addition, when installing the control panel as- sembly to base plate with screws, be sure of pushing the control panel unit upward to fix with screws firmly.

3.Do not allow any wire leads to come near the varistor works, because it will explode and the wire leads near by the varistor will be damaged.

HOW TO ATTACH MEMBRANE SWITCH AND GRAPHIC SHEET

A C

TOUCH CONTROL PANEL

SCREW DRIVER

1.Before attaching a new membrane switch and graphic sheet, remove remaining adhesive on the control panel frame surfaces completely with a soft cloth soaked in alcohol.

2.Attach the graphic sheet to the membrane switch, with adjusting their upper edges and right edges. (This assembly part is called key unit in the following.)

NOTE : When attaching the graphic sheet, make sure that air does not come between the membrane switch and the graphic sheet.

3.Then, adjust the upper edge and right edge of the key unit to the lower edge of the display window and the right flange of the control panel frame.

4.Stick the key unit firmly to the control panel frame by rubbing with soft cloth to prevent scratching.

POWER SUPPLY CORD REPLACEMENT

1.CARRY OUT 3D CHECKS

2.Release the cord bushing from the rear cabinet.

3.Disconnect the brown and blue wires of the power

supply cord from the noise filter.

4.Remove the single (1) screw holding the earth wire of power supply cord.

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Contents Commercial Microwave Oven Table of ContentsRemember to Check 4R Remember to Check 3DCommercial Microwave Oven Sharp Corporation OSAKA, Japan22AT/ R-24AT General Important InformationDescription SpecificationThis Appliance Must be Earthed Brown LiveDisplay and Indicators Installation InformationAppearance View Auto Touch Control PanelIdle Condition Operation SequenceMicrowave Cooking Condition Microwave Variable CookingFigure B-1. High Voltage Circuit TWO Magnetron Operation SystemFunction of Important Components Troubleshooting Guide EEP ROM KEY Unit Touch Control Transformer T3 Possible Cause and Defective PartsMicrowave 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 Switch Test High Voltage Rectifier Assembly Test Carry OUT 3D ChecksCarry OUT 4R Checks Carry OUT 4R ChecksTemperature Fuse TF1, TF2, TF3 Test Procedure Letter Component TestWeak Point F3 Test Carry OUT 3D Checks Fuse F1, F2 F10A Test Carry OUT 3D ChecksMotor Winding Test Touch Control Panel Assembly TestNoise Filter Test High Voltage Fuse F4, F5 Test Carry OUT 3D ChecksRelay Test KEY Unit TestRY1 RY3Occurrence Cause or Correction Touch Control Panel Assembly LSIIXA222DR Description of LSISignal synchronized with commercial power source frequency Signal to sound buzzerInternal clock oscillation frequency setting input 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 SET Number Double Quantity Check Signal Precautions for Using LEAD-FREE SolderUsing lead-free wire solder Employing lead-free solderHigh Voltage Transformers Removal Component Replacement and Adjustment ProcedureOuter CASE, Rear Cabinet and Power Supply Cord Removal Re-install Magnetron Thermistor ReplacementMagnetrons Removal RemovalTerminal Insulator Replacement HOW to Release the Positive Lock ConnectorBlower Motor Removal Stirrer Motors Upper and Lower RemovalPower Supply Cord Replacement Control Panel Assembly and Control Unit RemovalControl Panel Assembly Removal 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 Upper and Lower Latch Heads Removal Service InformationDoor Case 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 DG1 PanelCircuitFigure S-3. Printed Wiring Board Parts marked * are used in voltage more than Parts ListElectoric Parts Cabinet PartsRH-IXA222DRZZ LSI RH-IXA298DRZZ Eeprom Oven PartsSCRE,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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