Viking CDMOS200, CVMOS200 service manual Before Servicing, When the testing is completed

Page 4

CDMOS200

DMOS200

VMOS200

CVMOS200

WARNING TO SERVICE PERSONNEL

Microwave ovens contain circuitry capable of pro- ducing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock.

(Example)

High Voltage Capacitor, High Voltage Power Trans- former, Magnetron, High Voltage Rectifier Assem- bly, High Voltage Harness etc..

Read the Service Manual carefully and follow all

Don't Touch !

instructions.

 

Danger High Voltage

Before Servicing

1. Disconnect the power supply cord

, and then

remove outer case.

 

2.Open the door and block it open.

3.Discharge high voltage capacitor.

WARNING:RISK OF ELECTRIC SHOCK. DISCHARGE THE HIGH-VOLTAGE CAPACITOR BEFORE SERVICING.

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 the connecting lead of the high- voltage rectifier) against the chassis with the use of an insulated screwdriver.

Whenever troubleshooting is performed the power supply must be disconnected. It may in, some cases, be necessary to connect the power supply after the outer case has been removed, in this event,

1.Disconnect the power supply cord, and then remove outer case.

2.Open the door and block it open.

3.Discharge high voltage capacitor.

4.Disconnect the leads to the primary of the power transformer.

5.Ensure that the leads remain isolated from other components and oven chassis by using insulation tape.

6.After that procedure, reconnect the power supply cord.

When the testing is completed,

1.Disconnect the power supply cord, and then remove outer case.

2.Open the door and block it open.

3.Discharge high voltage capacitor.

4.Reconnect the leads to the primary of the power transformer.

5.Reinstall the outer case (cabinet).

6.Reconnect the power supply cord after the outer case is installed.

7.Run the oven and check all functions.

After repairing

1.Reconnect all leads removed from components during testing.

2.Reinstall the outer case (cabinet).

3.Reconnect the power supply cord after the outer case is installed.

4.Run the oven and 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 turntable, close the door and set the power to HIGH and set the microwave timer for two (2) minutes. When the two minutes has elapsed (timer at zero) carefully check that the water is now hot. If the water remains cold carry out Before Servicing procedure 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 a microwave leakage test should be carried out.

2

Page 3 Page 5
Image 4
Page 3 Page 5
Contents Table of Contents Models CDMOS200 VMOS200Before Servicing CDMOS200 VMOS200 CVMOS200 When the testing is completed Before ServicingMicrowave Measurement Procedure Canada Leakage test with enclosure installedRequirements Leakage test without enclosureMicrowave Measurement Procedure USA Leakage testViking Range Corporation If provided, Vent Hood, Fan assembly, Cooling Fan MotorMicrowave Ovens DMOS200 CDMOS200 VMOS200 CVMOS200 Foreword Specification General InformationDescription Grounding InstructionsMove the Round Grounding Prong from this Plug Oven DiagramVMOS200 model shown Power Level P-0 to P-90 Cooking OperationDescription of Operating Sequence OFF ConditionSensor Cooking Condition Cooking SequenceSchematic Door Closed Clock Appears on Display Imar Y IT C H C O Ndar Y S W IT C HDescription and Function of Components Troubleshooting Guide Test Procedures Test ProcedureProblem Procedure Letter Component Test Magnetron Assembly TestMicrowave Output Power Procedure Letter Component TestPower Transformer Test Procedure Letter Component Test High Voltage Rectifier Test Cavity Temperature Fuse TestMagnetron Temperature Fuse Test High Voltage Capacitor TestDoor Sensing Switch Monitor Switch TestSecondary Interlock System Test Secondary Interlock Relay RY2Before testing Touch Control Panel Assembly TestBlown Monitor Fuse Test Test Procedures KEY Unit TestRelay Test Weight 1ST Stage 2ND Stage Level TimeCompu Defrost Test Occurrence Cause or Correction Steps Occurrence Cause or CorrectionTesting Method for AH Sensor and /OR Control Unit AH Sensor TestChecking the initial sensor cooking condition Water load cooking testProcedure Letter Component Test Checking Control Unit Procedure Letter Component Test Noise Filter Test Measuring Point Indication of OHM-METERTouch Control Panel Assembly LSIIXA098DR Signal synchronized with commercial power source frequency Key strobe signalSignal coming from touch key Signal similar to P17Power source voltage GND0V Internal clock oscillation frequency control input settingPin No AH sensor inputSegment data signal Common data signal COM10SEG COM7 OUTAbsolute Humidity Sensor Circuit Structure of Absolute Humidity SensorTouch Control Panel Servicing Other PrecautionsServicing Tools Component Replacement and Adjustment Procedure Outer Case RemovalPower Transformer Removal Re-installHigh Voltage Rectifier and High Voltage Capacitor Removal Magnetron RemovalPositive Lock Connector NO-CASE Type Removal Control Panel Assembly RemovalOven Lamp and Lamp Socket Removal Turntable Motor RemovalAH Sensor Replacement RE-INSTALLCooling FAN Motor Removal RemovalDoor Replacement After adjustment, check the followingInstallation After any service, make sure of the followingSealer Film Diagram HIG H Voltag E C OmponeFigure S-2 Power Unit Circuit Circuit Figure S-3 CPUUnitFigure S-5 Printed Wiring Board of Power Unit Parts List Electric PartsCabinet Parts Control Panel PartsMiscellaneous Door PartsSCREWS,NUTS and Washers Oven and Cabinet Parts Control Panel Parts Door Parts Miscellaneous Packing and Accessories Copyright 2002 by Viking
Related manuals
Manual 45 pages 12.01 Kb
Top Page Image Contents