GE MV1526B, MV1526W Checkout Procedures for Relay Problem a, YES Good, Yes, RELAY3 Problem B

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(2)CHECKOUT PROCEDURES FOR RELAY.

-PROBLEM (A) -

T.T. motor and oven lamp turn on without touching

START key when the door is closed.

NO

YES

GOOD

Remove the mate connector of I/O CON from the circuit board.

Does the unit still operate?

NO

YES

Replace the circuit board

Defective

RELAY3

Replace

RELAY3

- PROBLEM (B) -

T.T.motor and oven lamp turn on When the door is closed and START key is touched.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GOOD

Measure the voltage at pin NO.

4 of U01

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Voltage reading: 0 Vdc

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace the circuit board

Defective

RELAY3 or poor

connection of

RELAY3

Replace

RELAY3 or correct

the connection.

7-19

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Contents Safety Precautions in this Manual Microwave OvenPage Table of Contents Specifications Microwave Radiation AntennaInstallation Grounding InstructionsOperating Instructions Control PanelControl Panel Instructions Overall Circuit Diagram Schematic DiagramMatrix Circuit for Touch KEY Board Features and Specifications Features General Information for ServiceGeneral Precautions in USE Trial OperationService Information Precautions and Repair Service TipsPreliminary Microwave Leakage Test EquipmentPower Output Measurement Measurement with the Outer Case RemovedDisassembly Instructions Important NotesHOW to Remove the F.P.C. Connector HOW to Insert the F.P.C. ConnectorRemoving the OUT CASEFigure Removing the Door Interlock Switches Figures 9,10 Wire ColorRemoving Magnetron Removing Door Figure Assembling Door Removing the Ventilation FAN ASS’YRemoving the Turntable Motor Interlock System Interlock MechanismTest the Latch and Switch Sequence Components Test Procedure Results SwitchesInterlock Continuity Test Magnetron Test and Checkout PROCEDURES, and Trouble ShootingTest Procedures HIGH-VOLTAGEHIGH-VOLTAGE Capacitor HIGH-VOLTAGE DiodeFPC Connector Touch KEY Board Connectorkey CONMatrix Circuit for Checkout Procedures for Fuse Blowing Checkout ProceduresPower Level RELAY2YES Good Checkout Procedures for Relay Problem aRELAY3 Problem B YESCheckout Procedures for Circuit Board Trouble Shooting Thermostat Page Fuse Exploded View Control Panel Oven Cavity Latch Board Interior 50FZZA Installation Schematic Diagram of P.C.B Printed Circuit Board July

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