Sharp R-22AT, R-24AT Magnetrons Removal, Magnetron Thermistor Replacement, Re-install

Page 27

5.Pull out the wire lead(s) of high voltage transformer(s) from the tube.

6.Disconnect wire lead(s) of high voltage transformer(s) from high voltage capacitor(s).

7.Disconnect the high voltage fuse(s) from high voltage transformer(s).

R-22AT

R-24AT

8.Disconnect the main wire harness from high voltage transformer(s).

9.Remove two (2) screws holding each power trans- former to base plate.

10.Remove the high voltage transformer(s) from base plate.

12.Now, high voltage transformer(s) are free.

MAGNETRON(S) REMOVAL

Removal

1.CARRY OUT 3D CHECKS.

2.Remove the rear cabinet, too.

3.Remove the two (2) screws holding magnetron ex- haust duct to upper and lower waveguide.

4.Remove the magnetron exhaust duct from oven cavity.

5.Disconnect wire leads from magnetron(s ).

6.Disconnect magnetron thermistor from the connector of the stop switch harness.

7.Remove the one (1) screw holding the thermistor angle to the upper magnetron.

8.Remove the four (4) screws holding each magnetron to

upper and/or lower waveguide. When removing the screws, hold the magnetron to prevent it from falling.

9.Remove the magnetron(s) from upper and/or lower waveguide with care so magnetron antenna is not hit by any metal object around antenna.

10.Pull out the thermistor angle from the upper magnet- ron.

11.Now, the magnetron(s) is (are) free.

CAUTION: WHEN REPLACING MAGNETRON, BE SURE THE R.F. GASKET IS IN PLACE AND MOUNTING SCREWS ARE TIGHTENED SECURELY.

MAGNETRON THERMISTOR REPLACEMENT

Removal

1.CARRY OUT 3D CHECKS.

2.Remove the rear cabinet, too.

3.Remove the magnetron from the waveguide flange, referring to "MAGNETRON(S) REMOVAL".

4.Now, the magnetron with the magnetron thermistor should be free.

5.Remove the thermistor angle from the magnetron by pulling out.

6.Straighten the tab of the magnetron thermistor angle holding the magnetron thermistor.

7.Remove the magnetron thermistor from the thermistor angle.

8.Now, the magnetron thermistor is free.

Re-install

1.Install the magnetron thermistor to the thermistor angle as shown in Figure C-1.

2.Hold the magnetron thermistor to the thermistor angle by bending the tab of the thermistor angle.

3.Insert the thermistor angle between the 2nd. fin and 3rd. fin from the upper fin of the magnetron and push it until the thermistor angle stops.

NOTE: The magnetron thermistor should be between the upper fin and the 2nd. fin.

4.Re-install the magnetron to the waveguide flange with four (4) screws.

5.Re-install the thermistor angle to the waveguide flange with one (1) screw.

6.Re-install the magnetron exhaust duct to the upper and lower waveguide flanges with two (2) screws.

7.Route the thermistor harness under the magnetron temperature fuse.

8.Connect the thermistor harness to the stop switch harness.

9.Connect the wire leads to the upper magnetron, refer- ring to the pictorial diagram.

10.Re-install the power supply cord, rear cabinet and outer case cabinet to the oven by reversing the proce- dures of "OUTER CASE, REAR CABINET AND POWER SUPPLY CORD REMOVAL".

Upper magnetron

Upper fin

Thermistor angle

Tab

Magnetron thermistor

Figure C-1. Magnetron thermistor installation

HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE FUSE AND HIGH VOLTAGE RECTIFIER

ASSEMBLY REMOVAL

1.CARRY OUT 3D CHECKS.

2.Remove the rear cabinet, too.

3.Remove two (2) screws holding earth side terminals of high voltage rectifier assembly to the capacitor holder and oven cavity.

4.Disconnect all wire leads from the high voltage capacitor.

5.Disconnect high voltage fuse(s) from the high voltage transformer(s). Now, high voltage fuse(s) is(are) free.

6.Remove the three (3) screws holding the blower motor to the top of oven cavity, the chassis support and air duct.

7.Disconnect high voltage wire lead(s) of the high volt- age rectifier assembly from the magnetron(s).

Now, the the high voltage rectifier assembly is free.

8.Remove two (2) screws holding the capacitor holder to oven cavity.

Now, the capacitors are free.

25

Page 26 Page 28
Image 27
Page 26 Page 28
Contents Commercial Microwave Oven Table of ContentsRemember to Check 4R Remember to Check 3DGeneral Important Information Sharp Corporation OSAKA, JapanCommercial Microwave Oven 22AT/ R-24ATBrown Live SpecificationDescription This Appliance Must be EarthedAuto Touch Control Panel Installation InformationDisplay and Indicators Appearance ViewMicrowave Variable Cooking Operation SequenceIdle Condition Microwave Cooking ConditionFigure 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 PartsTest Procedures Procedure Letter Component Test Magnetron TestMicrowave Output Power 1 litre water load Test Procedures Letter Component Test PowerMicrowave Output Power 2000 cc alternative method Carry OUT 4R Checks High Voltage Rectifier Assembly Test Carry OUT 3D ChecksSwitch Test Carry OUT 4R ChecksFuse F1, F2 F10A Test Carry OUT 3D Checks Procedure Letter Component TestTemperature Fuse TF1, TF2, TF3 Test Weak Point F3 Test Carry OUT 3D ChecksHigh Voltage Fuse F4, F5 Test Carry OUT 3D Checks Touch Control Panel Assembly TestMotor Winding Test Noise Filter TestRY3 KEY Unit TestRelay Test RY1Occurrence Cause or Correction Touch Control Panel Assembly LSIIXA222DR Description of LSIPower source voltage Signal to sound buzzerSignal synchronized with commercial power source frequency Internal clock oscillation frequency setting inputDigit selection signal Key strobe signalSound Voltage level control terminal Servicing Shapes of Electronic ComponentsServicing of Touch Control Panel Other Precautions Servicing ToolsPAD Order Display Phone Procedure for Entering to Other Checking and Clearing PROCE- Dure forDefrost Employing lead-free solder Precautions for Using LEAD-FREE SolderSET Number Double Quantity Check Signal Using lead-free wire solderComponent Replacement and Adjustment Procedure Outer CASE, Rear Cabinet and Power Supply Cord RemovalHigh Voltage Transformers Removal Removal Magnetron Thermistor ReplacementRe-install Magnetrons RemovalStirrer Motors Upper and Lower Removal HOW to Release the Positive Lock ConnectorTerminal Insulator Replacement Blower Motor RemovalHOW to Attach Membrane Switch and Graphic Sheet Control Panel Assembly and Control Unit RemovalPower Supply Cord Replacement Control Panel Assembly RemovalDoor Replacement and Adjustment After adjustment, make sure of the followingRemoval Door Disassembly Choke Cover RemovalDoor Components Removal Door Glass Removal Service InformationUpper and Lower Latch Heads Removal Door Case RemovalProcedure Microwave MeasurementPreparation 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 Cabinet Parts Parts ListParts marked * are used in voltage more than Electoric PartsRH-IXA222DRZZ LSI RH-IXA298DRZZ Eeprom Oven PartsDoor Parts MiscellaneousSCRE,NUTS and Washers HOW to Order Replacement Parts Packing and AccessoriesModel Number 2. REF. no Description Oven and Cabinet Parts Control Panel Parts Door Parts Miscellaneous
Related manuals
Manual 32 pages 63.06 Kb

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.
Top Page Image Contents