Viking CDMOS200, CVMOS200 Procedure Letter Component Test High Voltage Rectifier Test

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CDMOS200

DMOS200

VMOS200

CVMOS200

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

CHIGH VOLTAGE RECTIFIER TEST

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.Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance across the terminals and observe, reverse the leads to the rectifier terminals and observe meter reading. If a short is indicated in both directions, or if an infinite resistance is read in both directions, the rectifier is probably defective and should be replaced.

5.Reconnect all leads removed from components during testing.

6.Reinstall the outer case (cabinet).

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

8.Run the oven and check all functions.

NOTE: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts.

DHIGH VOLTAGE CAPACITOR TEST

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.If the capacitor is open, no high voltage will be available to the magnetron. Disconnect input leads and check for short or open between the terminals using an ohmmeter.

Checking with a high ohm scale, if the high voltage capacitor is normal, the meter will indicate continuity for a short time and should indicate an open circuit once the capacitor is charged. If the above is not the case, check the capacitor with an ohmmeter to see if it is shorted between either of the terminals and case. If it is shorted, replace the capacitor.

5.Reconnect all leads removed from components during testing.

6.Reinstall the outer case (cabinet).

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

8.Run the oven and check all functions.

ECAVITY TEMPERATURE FUSE TEST

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.A continuity check across the cavity temperature fuse terminals should indicate a closed circuit unless the temperature of the cavity temperature fuse reaches approximately 302oF(150oC). An open cavity temperature fuse indicates overheating of the oven, exchange the cavity temperature fuse and check inside of oven cavity and for improper setting of cooking time or operation of control unit. Check for restricted air flow through the vent holes of the oven cavity, especially the cooling fan and air guide.

5.Reconnect all leads removed from components during testing.

6.Reinstall the outer case (cabinet).

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

8.Run the oven and check all functions.

MAGNETRON TEMPERATURE FUSE TEST

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.A continuity check across the magnetron temperature fuse terminals should indicate a closed circuit unless the temperature of the magnetron temperature fuse reaches approximately 302oF(150oC). An open magnetron temperature fuse indicates overheating of the magnetron. Check for restricted air flow to the magnetron, especially the cooling fan air guide.

5.Reconnect all leads removed from components during testing.

6.Reinstall the outer case (cabinet).

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

8.Run the oven and check all functions.

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Contents Models CDMOS200 VMOS200 Table of ContentsBefore Servicing CDMOS200 VMOS200 CVMOS200 Before Servicing When the testing is completedLeakage test with enclosure installed Microwave Measurement Procedure CanadaRequirements Leakage test without enclosureLeakage test Microwave Measurement Procedure USAMicrowave Ovens DMOS200 CDMOS200 VMOS200 CVMOS200 Foreword If provided, Vent Hood, Fan assembly, Cooling Fan MotorViking Range Corporation General Information SpecificationDescription Grounding InstructionsVMOS200 model shown Oven DiagramMove the Round Grounding Prong from this Plug Operation Power Level P-0 to P-90 CookingDescription of Operating Sequence OFF ConditionCooking Sequence Sensor Cooking ConditionImar Y IT C H C O Ndar Y S W IT C H Schematic Door Closed Clock Appears on DisplayDescription and Function of Components Troubleshooting Guide Test Procedure Test ProceduresProblem Procedure Letter Component Test Magnetron Assembly TestPower Transformer Test Procedure Letter Component TestMicrowave Output Power Cavity Temperature Fuse Test Procedure Letter Component Test High Voltage Rectifier TestMagnetron Temperature Fuse Test High Voltage Capacitor TestMonitor Switch Test Door Sensing SwitchSecondary Interlock System Test Secondary Interlock Relay RY2Blown Monitor Fuse Test Touch Control Panel Assembly TestBefore testing KEY Unit Test Test ProceduresCompu Defrost Test Weight 1ST Stage 2ND Stage Level TimeRelay Test Steps Occurrence Cause or Correction Occurrence Cause or CorrectionAH Sensor Test Testing Method for AH Sensor and /OR Control UnitChecking the initial sensor cooking condition Water load cooking testProcedure Letter Component Test Checking Control Unit Measuring Point Indication of OHM-METER Procedure Letter Component Test Noise Filter TestTouch Control Panel Assembly LSIIXA098DR Key strobe signal Signal synchronized with commercial power source frequencySignal coming from touch key Signal similar to P17Internal clock oscillation frequency control input setting Power source voltage GND0VPin No AH sensor inputCommon data signal COM10 Segment data signalSEG COM7 OUTStructure of Absolute Humidity Sensor Absolute Humidity Sensor CircuitServicing Tools Other PrecautionsTouch Control Panel Servicing Outer Case Removal Component Replacement and Adjustment ProcedureRe-install Power Transformer RemovalHigh Voltage Rectifier and High Voltage Capacitor Removal Magnetron RemovalControl Panel Assembly Removal Positive Lock Connector NO-CASE Type RemovalOven Lamp and Lamp Socket Removal Turntable Motor RemovalRE-INSTALL AH Sensor ReplacementCooling FAN Motor Removal RemovalAfter adjustment, check the following Door ReplacementSealer Film After any service, make sure of the followingInstallation HIG H Voltag E C Ompone DiagramFigure S-2 Power Unit Circuit Figure S-3 CPUUnit CircuitFigure S-5 Printed Wiring Board of Power Unit Electric Parts Parts ListCabinet Parts Control Panel PartsSCREWS,NUTS and Washers Door PartsMiscellaneous Oven and Cabinet Parts Control Panel Parts Door Parts Miscellaneous Packing and Accessories Copyright 2002 by Viking
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CVMOS200, CDMOS200, DMOS200, VMOS200 specifications

The Viking VMOS200, DMOS200, CDMOS200, and CVMOS200 are advanced products designed for telecommunications and power management applications. Each model showcases unique features and technologies that make them stand out in their respective fields.

The VMOS200 is built on the vertical MOSFET technology, allowing for optimized performance in high-power applications. This device excels in switching capabilities and minimizing conduction losses, leading to improved efficiency. The VMOS200 is ideal for use in power amplifiers and high-frequency applications, where reliable performance and thermal stability are crucial. Its rugged design ensures that it can withstand harsh environments, making it a preferred choice for industrial and aerospace applications.

Next, the DMOS200 employs a double-diffused MOSFET technology, which enhances its thermal performance and power handling capabilities. This model is particularly effective in low-voltage applications where efficiency is paramount. The DMOS200 features a low on-resistance characteristic, allowing for reduced energy loss during operation. Its fast switching speed enables high-frequency operation, making it suitable for RF amplifiers and motor drives.

The CDMOS200 introduces a charge-balanced design, optimizing the allocation of charge carriers within the device to minimize heat generation and improve efficiency. This model is tailored for demanding applications in communications where signal integrity and power efficiency are critical. With its high breakdown voltage and robust construction, the CDMOS200 can handle more demanding operational conditions, making it popular in cellular and satellite communication systems.

Lastly, the CVMOS200 combines the advantages of vertical and charge-balanced technologies, offering a versatile solution for a broad range of applications. This hybrid design provides high efficiency, exceptional reliability, and enhanced thermal management. The CVMOS200 is particularly well-suited for switching power supplies and audio amplification. Its compact footprint allows for integration into space-constrained designs while maintaining high performance.

In summary, the Viking series of devices—VMOS200, DMOS200, CDMOS200, and CVMOS200—offer a range of features, technologies, and characteristics tailored to meet the demands of modern power electronics and telecommunications. With their robust designs, high efficiency, and adaptability to various applications, these devices are integral components for engineers and designers looking to create cutting-edge technological solutions.
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