Viking DMOC205SS, VMOC205SS service manual Noise Filter Test, Touch Control Panel Assembly Test

Page 21

DMOC205SS

VMOC205SS

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

temperature tester must be used. A low priced bi-metal type thermometer is not reliable or accurate. The temperature should be checked with outer case cabinet installed, approx. 5 minutes after preheat temperature is reached (audible signal sounds four times). The temperature experienced may be approx. 30οF more or less than indicated on the display, however, in most cases the food cooking results will be satisfactory.

Difference in power supply voltage will also affect the oven temperature. The Household power supply voltage may sometimes become lower than the rated voltage (117 V) and cause under-cooking. If the power supply voltage is 10% lower than the rated voltage, longer cooking time is required by 10% to 20%.

ONOISE FILTER TEST

Disconnect the oven from power supply.

Disconnect the lead wires from the terminal the noise filter. Using an ohmmeter, check between the terminals as described in the following table.

MEASURING POINT

INDICATION OF OHMMETER

 

 

Between N and H

Open circuit.

Between terminal N and GRAY

Short circuit.

 

 

Between terminal H and RED

Short circuit.

 

 

NOISE FILTER

NH

FUSE 20A

NOISE SUPPRESSION COIL

LINE CROSS CAPACITOR

0.22µF / AC 250V

LINE BYPASS

LINE BYPASS

CAPACITOR

CAPACITOR

0.0033µF / AC 125V

0.0033µF / AC 125V

If incorrect reading are obtained, replace the noise filter.

GRY

RED

PTOUCH CONTROL PANEL ASSEMBLY TEST

The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore, unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter and ohmmeter.

In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key Unit and troubleshooting by unit replacement is described according to the symptoms indicated.

1.Key Unit. Note : Check key unit ribbon connection before replacement. The following symptoms indicate a defective key unit. Replace the key unit.

a)When touching the pads, a certain pad produces no signal at all.

b)When touching a number pad, two figures or more are displayed.

c)When touching the pads, sometimes a pad produces no signal.

2.Control Unit

The following symptoms indicate a defective control unit. Replace the control unit.

2-1 In connection with pads.

a)When touching the pads, a certain group of pads do not produce a signal.

b)When touching the pads, no pads produce a signal.

2-2 In connection with indicators

a)At a certain digit, all or some segments do not light up.

b)At a certain digit, brightness is low.

c)Only one indicator does not light.

d)The corresponding segments of all digits do not light up; or they continue to light up.

e)Wrong figure appears.

f)A certain group of indicators do not light up.

g)All digits in the figure flicker.

2-3 Other possible troubles caused by defective control unit.

a)Buzzer does not sound or continues to sound.

b)Clock does not operate properly.

c)Cooking is not possible.

d)Proper temperature measurement is not obtained.

Note: When defective components, the Control Unit or Key Unit are replaced, the defective part or parts must be properly packed for return in the shipping carton, with its cushion material, in which the new replacement part was shipped to you.

19

Page 20 Page 22
Image 21
Page 20 Page 22
Contents Models DMOC205SS VMOC205SS Table of ContentsBefore Servicing DMOC205SS VMOC205SS Before Servicing When the testing is completedLeakage test with enclosure installed Microwave Measurement Procedure CanadaRequirements Leakage test without enclosureLeakage test Microwave Measurement Procedure USAIf provided, Vent Hood, Fan assembly, Cooling Fan Motor Viking Range CorporationMicrowave Ovens DMOC205SS VMOC205SS Foreword Specification DescriptionHigh MIX. Roast VMOC205SS Oven DiagramOperation Power Level P-0 to P-90 CookingDescription of Operating Sequence OFF ConditionAutomatic MIX Cooking Condition Convection Cooking ConditionSensor Cooking Condition Preheating ConditionCompu Defrost Cooking Fire Sensing Feature Microwave ModeCompu BROIL/ Compu ROAST/ Compu Bake Cooking SequenceFigure O-1. Oven Schematic-OFF Condition Schematic DiagramFigure O-3. Oven Schematic-Automatic Mix Cooking Condition Description and Function of Components Damper OPEN-CLOSE Mechanism Troubleshooting GuideMicrowave Cooking Damper OperationProblem Test ProcedurePower Transformer Test High Voltage Rectifier TestHigh Voltage Capacitor Test Primary Interlock Switch and Third Door Switch Test Test Procedures Letter Component TestMonitor Switch Secondary Interlock System TestChecking Temperature in the Convection Mode Damper Switch TestHeating Element Test Thermistor TestNoise Filter Test Touch Control Panel Assembly TestWeight 1ST Stage 2ND Stage 3RD Stage 4TH Stage Level Time Test Procedures Letter Component Test KEY Unit TestRelay Test Compu Defrost TestAH Sensor Test Steps Occurrence Cause or CorrectionChecking the initial sensor cooking condition Water load cooking testChecking Control Unit Testing Method for AH Sensor AND/OR Control UnitDescription of LSI Touch Control Panel AssemblyThermistor LSIIXA103DRDigit selection signal Temperature measurement input Oven ThermistorConvection motor driving signal Cooling fan motor driving signalTOR Segment data signals Segment data signalKey strobe signal Structure of Absolute Humidity Sensor Absolute Humidity Sensor CircuitServicing Power Transformer Removal Component Replacement and Adjustment ProcedureOuter Case Removal Magnetron RemovalPositive Lock Connector NO-CASE Type Removal High Voltage Rectifier Assembly RemovalDamper Assembly Removal High Voltage Capacitor RemovalFAN Motor Removal Oven Lamp and Lamp Socket RemovalThermistor Removal Heating Element RemovalPower Supply Cord Replacement Control Panel Assembly and Control Unit RemovalControl Unit and KEY Unit Adjustment Door Replacement and AdjustmentAfter adjustment, check the following RemovalDoor Disassembly Door AdjustmentAfter adjustment, make sure of the following Preparation For Testing Microwave Measurement ProcedureLeakage test Leakage Test with Enclosure Installed RequirementFigure S-1. Pictorial Diagram SFigureControl Panel DIP Electrical Parts Parts ListCabinet Parts Control Panel PartsDoor Parts MiscellaneousScrews Nuts and Washers LX-NZ0029YBE0 Oven and Cabinet Parts Control Panel Parts Door Parts Packing and Accessories DMOC205SS VMOC205SS Copyright 2004 by Viking

VMOC205SS, DMOC205SS specifications

The Viking DMOC205SS and VMOC205SS are two state-of-the-art microwave ovens that redefine cooking convenience and efficiency. Designed for modern kitchens, these appliances come equipped with a range of features and technologies that enhance their usability and performance.

One of the most notable aspects of the Viking DMOC205SS and VMOC205SS is their powerful cooking capabilities. Both models utilize an advanced cooking system that ensures even heat distribution, resulting in perfectly cooked meals every time. With a robust wattage of up to 1,200 watts, these microwaves can quickly and efficiently prepare a wide variety of dishes.

The DMOC205SS features a spacious interior, offering 2.1 cubic feet of cooking space, making it ideal for larger families or those who frequently entertain guests. The VMOC205SS variant also shares a similar capacity but comes with additional features tailored for versatility. The interior design of both models includes a stainless steel finish that not only enhances durability but also adds a touch of elegance to any kitchen.

Functionality is at the forefront of the Viking DMOC205SS and VMOC205SS. Both models are equipped with multiple cooking modes, including microwave, convection, and grilling options. This multi-functional capability allows users to seamlessly switch between cooking methods, ensuring optimal results for various recipes. The intuitive control panel features easy-to-read buttons and a digital display, making it user-friendly for all cooking levels.

In terms of technology, these Viking microwaves incorporate sensor cooking, which automatically detects the moisture and temperature of food, adjusting cooking times accordingly. This feature not only prevents overcooking but also ensures consistently delicious results. The models also come with pre-programmed cooking settings for popular dishes, making meal preparation simpler and quicker.

Energy efficiency is another critical aspect of the Viking DMOC205SS and VMOC205SS. Both models are designed to minimize energy consumption while maximizing performance, which is beneficial for both the environment and the homeowner’s energy bills.

Safety features are embedded within the design of these microwaves. They include a child lock function to prevent accidental use, as well as a timer that ensures food is cooked for the precise amount of time needed.

In summary, the Viking DMOC205SS and VMOC205SS are exceptional microwave ovens that combine advanced technology, practical features, and stylish design. Their powerful cooking capabilities, user-friendly controls, and energy-efficient operation make them a perfect addition to any modern kitchen. These appliances empower users to explore a wide range of cooking possibilities, bringing convenience and quality to meal preparation.
Top Page Image Contents