GE MV1526W, MV1526B service manual Disassembly Instructions, Important Notes

Page 15

DISASSEMBLY INSTRUCTIONS

IMPORTANT NOTES:

UNIT MUST BE DISCONNECTED FROM ELEC- TRICAL OUTLET WHEN MAKING REPAIRS, RE- PLACEMENTS, ADJUSTMENTS AND CONTIN- UITY CHECKS. WAIT AT LEAST ONE MINUTE, UNTIL THE HIGH VOLTAGE CAPACITOR IN THE HIGH VOLTAGE POWER SUPPLY HAS FULLY DISCHARGED.

THE CAPACITOR SHOULD BE DISCHARGED BY USING INSULATED WIRE - I.E. TEST PROBE CONNECTED TO 10K-OHM RESISTOR IN SERIES TO GROUND.

WHEN RECONNECTING THE WIRE LEADS TO ANY PART, MAKE SURE THE WIRING CONNE- CTIONS AND LEAD COLORS ARE CORRECTLY MATCHED ACCORDING TO THE OVERALL CIR- CUIT DIAGRAM. (ESPECIALLY SWITCHES AND HIGH VOLTAGE CIRCUIT.)

A.REMOVING POWER AND CONTROL CIRCUIT BOARD (Figures 1, 2 and 3)

(1)Remove a screw securing the control panel assembly to the oven cavity.

(2)Remove the control panel with pushing it upward.

(3)Remove the connector (CN1) and wire leads (Relay6) from the circuit board.

Control Panel

Screw

Power Transformer

Relay 7

(Relay 7)

(4) Remove 3 screws securing the circuit board.

Circuit Board

Figure 2

(5)Remove the FPC connector from the terminal socket following “HOW TO REMOVE THE FPC CONNECTOR” on the next page.

(6)Remove the circuit board from the control bracket carefully.

Control Bracket

FPC Connector(S1)

Circuit Board

(CN1)

Figure 1

Figure 3

7-4

Image 15 Contents
Microwave Oven Safety Precautions in this ManualPage Table of Contents Specifications Antenna Microwave RadiationGrounding Instructions InstallationControl Panel Operating InstructionsControl Panel Instructions Schematic Diagram Overall Circuit DiagramMatrix Circuit for Touch KEY Board Trial Operation General Information for Service General Precautions in USE Features and Specifications FeaturesService Information Precautions and Repair Service TipsPreliminary Equipment Microwave Leakage TestMeasurement with the Outer Case Removed Power Output MeasurementImportant Notes Disassembly InstructionsHOW to Insert the F.P.C. Connector HOW to Remove the F.P.C. ConnectorRemoving the OUT CASEFigure Wire Color Removing the Door Interlock Switches Figures 9,10Removing Magnetron Removing Door Figure Removing the Ventilation FAN ASS’Y Assembling DoorRemoving the Turntable Motor Interlock Mechanism Interlock SystemTest the Latch and Switch Sequence Components Test Procedure Results SwitchesInterlock Continuity Test HIGH-VOLTAGE Test and Checkout PROCEDURES, and Trouble ShootingTest Procedures MagnetronHIGH-VOLTAGE Diode HIGH-VOLTAGE CapacitorFPC Connector Touch KEY Board Connectorkey CONMatrix Circuit for RELAY2 Checkout ProceduresPower Level Checkout Procedures for Fuse BlowingYES Checkout Procedures for Relay Problem aRELAY3 Problem B YES GoodCheckout 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