Sharp R-22AT, R-24AT service manual Servicing Tools, Other Precautions, PAD Order Display Phone

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touch control panel with a jumper, which brings about an operational state that is equivalent to the oven door being closed. As for the sensor-related controls of the touch control panel, checking them is possible if dummy resistor(s) with resistance equal to that of the controls are used.

(2)Servicing the touch control panel with power supply from an external power source:

Disconnect the touch control panel completely from the oven proper,and short both ends of the door sensing switch (on PWB) of the touch control panel,which brings about an operational state that is equivalent to the oven door being closed. Connect an external power source to the power input terminal of the touch control panel, then it is possible to check and repair the controls of the touch control panel it is also possible to check the sensor-related controls of the touch control panel by using the dummy resistor(s).

4.Servicing Tools

Tools required to service the touch control panel as- sembly.

R-22AT

R-24AT

1)Soldering iron: 60W

(It is recommended to use a soldering iron with a grounding terminal.)

2)Oscilloscope: Single beam, frequency range: DC- 10MHz type or more advanced model.

3)Others: Hand tools

5. Other Precautions

1)Before turning on the power source of the control unit, remove the aluminium foil applied for preventing static electricity.

2)Connect the connector of the key unit to the control unit being sure that the lead wires are not twisted.

3)After aluminium foil is removed, be careful that abnor- mal voltage due to static electricity etc. is not applied to the input or output terminals.

4)Attach connectors, electrolytic capacitors, etc. to PWB, making sure that all connections are tight.

5)Be sure to use specified components where high precision is required.

PROCEDURE FOR CHECKING/CLEARING SERVICE COUNTS OF MICROWAVE OVEN

The following procedure enables the servicer to obtain the total service counts (cook cycles) for memory cooking, manual, repeat, double quantity cooking and defrost. The maximum capacity of the counter is 999,999 counts, above which the counter will reset to "0". The counter will retain the total counts (will not clear) in the event of a power disruption.

1)Practice for checking total service counts (eg; 234,567 Counts).

 

 

 

--- flashing / ---0.1sec. BUZZER

PAD

DISPLAY

INDICATOR LED PHONE

(door close)

 

•

 

 

 

•

 

CHECK

NUMBER

•

CHECK

CHECK

#1

82 68

CHECK

 

(user total count)

 

#2

 

 

 

VOLUME

 

 

 

VOLUME

 

 

 

DOUBLE

2 34 56 7

 

QUANTITY

(service total count)

 

1

NUMBER

1

 

 

(after 1 sec.)

 

 

 

45

 

 

(filter used time)

 

2

NUMBER

2

 

 

(after 1 sec.)

 

2 00

 

(filter lim. time)

 

 

0 (No 10)

NUMBER 10

 

(after 1 sec.)

 

 

 

35 43 2

 

(service total cook time)

 

 

CHECK

•

#2: Denotes the procedure for the servicer to disable checking/clearing. This procedure is instructed to serv- ice personnel only and is excluded from the operation manual.

2)Practice for clearing Service's counts

"" : Flicker / : 0.1 sec BUZZER

PAD ORDER

DISPLAY

PHONE

(Door close)

•

 

 

 

CHECK

"NUMBER" •

 

CHECK

 

CHECK

82 68

 

"CHECK"

 

 

(User's Total Counts)

 

#1 VOLUME

82 68

 

"CHECK"

 

VOLUME

82 68

 

"CHECK"

 

DOUBLE QUANTITY

2 34 56

7 "CHECK"

 

 

(Total Counts Service)

 

SET

 

0

"CHECK"

 

0

 

0

"CHECK"

 

SET

 

0

"CHECK"

 

CHECK

•

 

 

 

#1: Denotes the procedure for the servicer to disable clearing. This procedure is instructed to service per- sonnel only and is excluded from the operation manual.

#1: Denotes total service counts within the reach of user, of which checking and clearing practices are de- scribed in this instruction manual.

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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 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 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 inputSound 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 Employing lead-free solder Precautions for Using LEAD-FREE SolderSET Number Double Quantity Check Signal Using lead-free wire solderHigh Voltage Transformers Removal Component Replacement and Adjustment ProcedureOuter CASE, Rear Cabinet and Power Supply Cord 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 RemovalRemoval Door Replacement and AdjustmentAfter adjustment, make sure of the following Door Components Removal Door DisassemblyChoke Cover Removal Door Glass Removal Service InformationUpper and Lower Latch Heads Removal Door Case 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 Cabinet Parts Parts ListParts marked * are used in voltage more than Electoric 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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