Sharp R-2397 service manual Figure O-1. Oven SChematic-OFF Condition

Page 32

R-2397

SCHEMATIC

NOTE: CONDITION OF OVEN 1. DOOR CLOSED

2. APPEARS ON DISPLAY

NOTE: "" INDICATES COMPONENTS WITH POTENTIALS ABOVE 250V. C1 and C2: 1.07μF/ AC 2100V

230V~50Hz

NOISE FILTER

F1: WEAK POINT A017

F4: WEAK POINT A018

TC2: MAGNETRON

:T1

VOLTAGEHIGH

TRANSFORMER

(FRONT)

THERMAL CUT OUT

2ND LATCH SWITCH

145C°(LOWER)

F2:

FUSE F6.3A

F3:

WEAK POINT

A018

TC1 :MAGNETRON

THERMAL

°

THERMAL

115C

CUT OUT

MONITOR MONITORRESISTOR

SWITCH

BLOWER:TC3 MOTOR

THERMAL 115C

CUT OUT

A1 TAB1

145C°(UPPER)

TRANSFORMER

(REAR)

TC4 :

A7

A3

RY1

RY3

RY4

B1

B2

B3

D3D1H1 H3

INTAKE THERMISTER

:T2

OUT

OVEN

TAB3

TAB4

TAB2

CUT

MAGNETRON THERMISTER

VOLTAGE

°

A5

CONTROL

UNIT

HIGH

OVEN LAMP

OL

STIRRER MOTOR

SM

SM

BLOWER MOTOR

BM

STOP SWITCH

EXHAUST THERMISTER

1ST LATCH SWITCH	3RD LATCH SWITCH
(PRIMARY INTERLOCK SWITCH)

Figure O-1. Oven SChematic-OFF Condition

C1: H.V. CAPACITOR
ASYMMETRIC	H. V. RECTIFIER
RECTIFIER

C2: H.V. CAPACITOR
ASYMMETRIC	H. V. RECTIFIER
RECTIFIER

MG1: MAGNETRON (UPPER)

MG2: MAGNETRON (LOWER)

SCHEMATIC

NOTE: CONDITION OF OVEN

1.DOOR CLOSED.

2.TIME KEY TIUCHED.

3.COOKING TIME PROGRAMMED.

4.START KEY TOUCHED

230V~50Hz

NOISE FILTER

F1: WEAK POINT A017

F2:

FUSE

F6.3A

TC2: MAGNETRON

:T1

VOLTAGEHIGH

TRANSFORMER

(FRONT)

F4: WEAK POINT A018

THERMAL CUT OUT

2ND LATCH SWITCH

145C°(LOWER)

F3:

WEAK POINT

A018

TC1 : MAGNETRON

MONITOR

MONITORRESISTOR

SWITCH

:TC3 THERMAL

115C

TC4 : OVEN THERMAL

°

A7

A3

A1

TAB1

RY1

RY3

RY4

B1

B2

B3

THERMAL

:T2

TRANSFORMER

(REAR)

CUT OUT 115C

H1D3D1H3

INTAKE THERMISTER

CUT OUT

145C°(UPPER)

MOTORBLOWER

OUTCUT

TAB3

TAB4

TAB2

MAGNETRON THERMISTER

VOLTAGE

°

A5

CONTROL

UNIT

HIGH

OVEN LAMP

OL

STIRRER MOTOR

SM

SM

BLOWER MOTOR

BM

STOP SWITCH

EXHAUST THERMISTER

1ST LATCH SWITCH	3RD LATCH SWITCH
(PRIMARY INTERLOCK SWITCH)

C1: H.V. CAPACITOR
ASYMMETRIC	H. V. RECTIFIER
RECTIFIER

C2: H.V. CAPACITOR
ASYMMETRIC	H. V. RECTIFIER
RECTIFIER

MG1: MAGNETRON (UPPER)

MG2: MAGNETRON (LOWER)

Figure O-2. Oven SChematic-ON Condition

30

Image 32

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 TestKEY Unit Test Touch Control Panel Assembly TestMin Cx ± 20% Cy ± 20% 5mH 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 ProcedureAfter adjustment, make sure of the following Power Supply Cord ReplacementRe-install 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.