Sharp R-2397 Procedure Component Test Letter Magnetron Thermistor Test, Exhaust Thermistor Test

Page 16

R-2397

TEST PROCEDURES

PROCEDURE

COMPONENT TEST

LETTER

KMAGNETRON THERMISTOR TEST

CARRY OUT 3D CHECKS.

Disconnect connector-H from the CPU unit. Measure the resistance of the thermistor with an ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.

Room Temp.

Resistance

15˚C

Approx. 15.91 kΩ

20˚C

Approx. 13.04 kΩ

25˚C

Approx. 10.74 kΩ

If the meter does not indicate above resistance, replace the thermistor.

CARRY OUT 4R CHECKS.

EXHAUST THERMISTOR TEST

CARRY OUT 3D CHECKS.

Disconnect connector-B from the CPU unit. Measure the resistance of the thermistor with an ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.

Room Temp.

Resistance

15˚C

Approx. 77.45 kΩ

20˚C

Approx. 61.47 kΩ

25˚C

Approx. 49.12 kΩ

If the meter does not indicate above resistance, replace the thermistor.

CARRY OUT 4R CHECKS.

INTAKE THERMISTOR TEST

CARRY OUT 3D CHECKS.

Disconnect connector-D from the CPU unit. Measure the resistance of the thermistor with an ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.

Room Temp.

Resistance

15˚C

Approx. 15.88 kΩ

20˚C

Approx. 13.03 kΩ

25˚C

Approx. 10.74 kΩ

If the meter does not indicate above resistance, replace the thermistor.

CARRY OUT 4R CHECKS.

LMOTOR WINDING TEST

CARRY OUT 3D CHECKS.

Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two terminals.

Resistance of Blower motor should be approximately 52Ω.

Resistance of Stirrer motor should be approximately 8.8 kΩ.

If incorrect readings are obtained, replace the motor.

CARRY OUT 4R CHECKS.

MNOISE FILTER TEST CARRY OUT 3D CHECKS.

Disconnect the leads from the terminals of noise filter. Using an ohmmeter, check between the terminals as described in the following table.

14

Page 15 Page 17
Image 16
Page 15 Page 17
Contents Table of Contents Commercial Microwave Oven2397 Sharp Corporation OSAKA, Japan Commercial2397 General Important InformationSpecification Product DescriptionGeneral Information DescriptionInstallation Information Display and IndicatorsAppearance View Operating KeysOperation Sequence OFF ConditionMicrowave Cooking Condition Microwave Variable CookingFunction of Important Components Asymmetric Rectifier Exhaust ThermistorIntake Thermistor Magnetron ThermistorTroubleshooting Guide ServicingRemember to Check 3D Remember to Check 4RTest Procedure Possible Cause Defective Parts Plugged into wall outletTemperature of Intake Thermistor is High Test Procedures Procedure Component Test Letter Magnetron TestMicrowave Output Power IEC-705-1988 Around 20 C Power supply Voltage Rated voltageProcedure Letter Component Test High Voltage Transformer TestCarry OUT 3D Checks Carry OUT 4R ChecksProcedure Component Test Letter Switch TestHigh Voltage Capacitor Test Carry OUT 3D Checks Weak Point A018Fuse F6.3A Test Thermal CUT-OUT Test Carry OUT 3D ChecksTable Thermal Cut-out Test Monitor Resistor Test Carry OUT 3D ChecksProcedure Component Test Letter Magnetron Thermistor Test Exhaust Thermistor TestIntake Thermistor Test Motor Winding TestMin Cx ± 20% Cy ± 20% 5mH Touch Control Panel Assembly TestKEY Unit Test Test Procedures Contd To determine if the control unit or key pad is at faultRelay Test CircuityPower Supply Circuit Power Sync Signal Generating CircuitStop Switch Circuit Exhaust Air Temperature Detecting CircuitDescription of LSI LSIIZA646DR Pin No Signal Description Internal clock oscillation frequency setting inputPower source voltage Signal coming from touch keySound Voltage level control terminal Other Precautions ServicingShapes of Electronic Components Servicing of Touch Control PanelProcedure for Entering to IC-2 Practice for checking total service counts eg 234,567 CountsTo check the contents of defrost Flicker / 0.1 sec Buzzer Other Checking and Clearing PRO CedureComponent Replacement and Adjustment Procedure Outer Case RemovalHigh Voltage Components Removal To remove the components, proceed as followsMagnetron Removal High Voltage Transformer RemovalBlower Motor Removal Stirrer Motor Upper RemovalControl Panel Assembly and Control Unit Removal HOW to Release the Positive Lock ConnectorControl Panel Assembly Removal ProcedureRe-install Power Supply Cord ReplacementAfter adjustment, make sure of the following Door Replacement and Adjustment Door ReplacementDoor Adjustment Choke Cover RemovalService Information Preparation for TestingMicrowave Measurement RequirementFigure O-1. Oven SChematic-OFF Condition High Voltage Components Circuit C d eFigure S-3. Printed Wiring Board Parts List Parts marked * are used in voltage more thanElectric Parts Cabinet PartsVCEAB31HW104M Oven Parts Door PartsMiscellaneous SCRE, Nuts and WashersHOW to Order Replacement Parts Model NumberREF. 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.
Top Page Image Contents