Sharp R-2397 Servicing, Troubleshooting Guide, Remember to Check 3D, Remember to Check 4R

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R-2397

SERVICING

WARNING TO SERVICE PERSONNEL

Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with following parts will result in electrocution.

High voltage capacitor, High voltage transformer, Magnetron, High voltage rectifier assembly, High voltage harness.

REMEMBER TO CHECK 3D

1)Disconnect the supply.

2)Door opened, and wedged open.

3)Discharge high voltage capacitor.

WARNING AGAINST THE CHARGE OF THE

HIGH-VOLTAGE CAPACITOR

The high-voltage capacitor remains charged about 60 seconds after the oven has been switched off. Wait for 60 seconds and then short- circuit the connection of the high-voltage capacitor (that is, of the connecting lead of the high-voltage rectifier) against the chassis with the use of an insulated screwdriver.

Sharp recommend that wherever possible fault-finding is carried out with the supply disconnected. It may in, some cases, be necessary to connect the supply after the outer case has been removed, in this event carry out 3D checks and then disconnect the leads to the primary of the high voltage transformer. Ensure that these leads remain isolated from other components and the oven chassis. (Use insulation tape if necessary.) When the testing is completed carry out 3D checks and reconnect the leads to the primary of the high voltage transformer.

REMEMBER TO CHECK 4R

1)Reconnect all leads removed from components during testing.

2)Replace the outer case (cabinet).

3)Reconnect the supply.

4)Run the oven. Check all functions.

Microwave ovens should not be run empty. To test for the presence of microwave energy within a cavity, place a cup of cold water on the oven tray, close the door and press Manual / Repeat key and set the microwave time for one (1) minute. Set the power level to 100% and push the START button. When the one minutes has elapsed (timer at zero) carefully check that the water is now hot. If the water remains cold carry out 3D checks and re- examine the connections to the component being tested.

When all service work is completed, and the oven is fully assembled, the microwave power output should be checked and microwave leakage test carried out.

TROUBLESHOOTING GUIDE

When troubleshooting the microwave oven, it is helpful to

IMPORTANT: If the oven becomes inoperative because

follow the Sequence of Operation in performing the checks.

of a blown fuse F2 F6.3A in the 1st latch

Many of the possible causes of trouble will require that a

switch - monitor switch - monitor resisitor

specific test be performed. These tests are given a

circuit, check the 1st latch switch, monitor

procedure letter which will be found in the “Test

switch and monitor resistor before re-

Procedure”section.

placing the fuse F6.3A.

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Contents Commercial Microwave Oven Table of Contents2397 Commercial Sharp Corporation OSAKA, Japan2397 General Important InformationProduct Description SpecificationGeneral Information DescriptionDisplay and Indicators Installation InformationAppearance View Operating KeysOFF Condition Operation SequenceMicrowave Cooking Condition Microwave Variable CookingFunction of Important Components Exhaust Thermistor Asymmetric RectifierIntake Thermistor Magnetron ThermistorServicing Troubleshooting GuideRemember to Check 3D Remember to Check 4RPlugged into wall outlet Test Procedure Possible Cause Defective PartsTemperature of Intake Thermistor is High Procedure Component Test Letter Magnetron Test Test ProceduresMicrowave Output Power IEC-705-1988 Around 20 C Power supply Voltage Rated voltageHigh Voltage Transformer Test Procedure Letter Component TestCarry OUT 3D Checks Carry OUT 4R ChecksSwitch Test Procedure Component Test LetterHigh Voltage Capacitor Test Carry OUT 3D Checks Weak Point A018Thermal CUT-OUT Test Carry OUT 3D Checks Fuse F6.3A TestTable Thermal Cut-out Test Monitor Resistor Test Carry OUT 3D ChecksExhaust Thermistor Test Procedure Component Test Letter Magnetron Thermistor TestIntake Thermistor Test Motor Winding TestTouch Control Panel Assembly Test Min Cx ± 20% Cy ± 20% 5mHKEY Unit Test To determine if the control unit or key pad is at fault Test Procedures ContdRelay Test CircuityPower Sync Signal Generating Circuit Power Supply CircuitStop Switch Circuit Exhaust Air Temperature Detecting CircuitDescription of LSI LSIIZA646DR Internal clock oscillation frequency setting input Pin No Signal DescriptionPower source voltage Signal coming from touch keySound Voltage level control terminal Servicing Other PrecautionsShapes of Electronic Components Servicing of Touch Control PanelPractice for checking total service counts eg 234,567 Counts Procedure for Entering to IC-2Other Checking and Clearing PRO Cedure To check the contents of defrost Flicker / 0.1 sec BuzzerOuter Case Removal Component Replacement and Adjustment ProcedureHigh Voltage Components Removal To remove the components, proceed as followsHigh Voltage Transformer Removal Magnetron RemovalBlower Motor Removal Stirrer Motor Upper RemovalHOW to Release the Positive Lock Connector Control Panel Assembly and Control Unit RemovalControl Panel Assembly Removal ProcedurePower Supply Cord Replacement Re-installAfter adjustment, make sure of the following Door Replacement Door Replacement and AdjustmentDoor Adjustment Choke Cover RemovalPreparation for Testing Service InformationMicrowave Measurement RequirementFigure O-1. Oven SChematic-OFF Condition High Voltage Components C d e CircuitFigure S-3. Printed Wiring Board Parts marked * are used in voltage more than Parts ListElectric Parts Cabinet PartsVCEAB31HW104M Door Parts Oven PartsSCRE, Nuts and Washers MiscellaneousModel Number HOW to Order Replacement PartsREF. no DescriptionOven and Cabinet Parts Control Panel Parts Door Parts Not replaceable items 2397

R-2397 specifications

The Sharp R-2397 is a high-performance microwave oven that combines advanced technology with user-friendly features, making it a popular choice for modern kitchens. This model stands out due to its sleek design and efficient functionality, catering to both cooking enthusiasts and busy households alike.

One of the most notable features of the Sharp R-2397 is its powerful microwave cooking capabilities. With a wattage rating of 900 watts, it ensures that food is cooked evenly and quickly, allowing users to prepare meals in a fraction of the time compared to conventional ovens. The unit also offers multiple power levels, enabling precise cooking adjustments for various types of food, from defrosting to reheating and everything in between.

Another key characteristic of the R-2397 is its spacious interior. With a generous capacity of 23 liters, this microwave can accommodate larger dishes, making it suitable for families or individuals who enjoy hosting gatherings. The turntable feature promotes even cooking by rotating food continuously, ensuring that every inch is heated uniformly.

Additionally, the Sharp R-2397 is equipped with a range of convenient presets and auto-cook functions. These pre-programmed settings allow users to optimize cooking times for common dishes, such as popcorn, vegetables, and frozen meals, simplifying meal preparation and enhancing user experience. The intuitive control panel is designed to be user-friendly, ensuring that anyone can operate the microwave with ease.

Safety is also a significant consideration in the design of the Sharp R-2397. The unit comes with a child lock function, preventing accidental operation and ensuring that the oven is used safely in households with young children. This feature adds peace of mind for parents while using the appliance in their daily routines.

Moreover, the R-2397 incorporates a modern aesthetic that can fit into various kitchen styles. Its polished exterior and compact design make it both attractive and practical, with the added advantage of easy cleaning and maintenance.

In summary, the Sharp R-2397 is a versatile microwave oven that offers a blend of power, efficiency, and user-centric features. With its high wattage, spacious interior, smart presets, and safety measures, it is an excellent addition to any kitchen, catering to everyday cooking needs and helping to simplify meal times. Whether reheating leftovers or cooking a new recipe, the Sharp R-2397 sets itself apart as a reliable kitchen companion.
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