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Manual Viking DMOC205SS

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  • Viking DMOC205SS - page 1

    DMOC205SS VMOC205SS In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specifie d should be used. WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the following parts may result in a severe, possibly fa ...

  • Viking DMOC205SS - page 2

    DMOC205SS VMOC205SS PRECA UTIONS T O BE OBSER VED BEFORE AND DURING SER VICING T O A V OID POSSIBLE EXPOSURE T O EXCESSIVE MICRO W A VE ENERGY (a) Do not operate or allow the oven to be operated with the door open. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make re ...

  • Viking DMOC205SS - page 3

    1 DMOC205SS VMOC205SS Notes ...

  • Viking DMOC205SS - page 4

    2 DMOC205SS VMOC205SS W ARNING T O SER VICE 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 Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltag ...

  • Viking DMOC205SS - page 5

    3 DMOC205SS VMOC205SS MICR O W A VE MEASUREMENT PROCEDURE (CANAD A) After adjustment of the door switches are completed individually or collectively, switch test and microwave leakage test must be performed with survey instrument and test result must be confirmed to meet the requirement of the performance standard for microwave ovens as undermentio ...

  • Viking DMOC205SS - page 6

    4 DMOC205SS VMOC205SS MICR O W A VE MEASUREMENT PR OCEDURE (USA) A. Requirements: 1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1mW/cm 2 at any point 5cm or more from the external surface of the oven, measured prior to acquisition by a purchaser, and thereaft ...

  • Viking DMOC205SS - page 7

    5 DMOC205SS VMOC205SS VIKING RANGE CORPORA TION 111 Front St., Greenwood, MS 38930 Tel: (888) 845-4641 SER VICE MANU AL VIKING RANGE CORPORA TION MICROWAVE OVENS FOREWORD This Manual has been prepared to provide Viking Service Personnel with Operation and Service Information for the Viking Microwave Ovens, DMOC205SS, VMOC205SS. It is recommended th ...

  • Viking DMOC205SS - page 8

    6 DMOC205SS VMOC205SS SPECIFICA TION ITEM DESCRIPTION Power Requirements 120 Volts 13.0 Amperes (Microwave) / 13.0 Amperes (Convection) 60 Hertz / Single phase, 3 wire grounded Power Output 900 watts (IEC 705 Test Procedure) Operating frequency of 2450MHz Convection Power Output 1450 Watts Case Dimensions Width 24-5/8" Height 14-7/8" Dept ...

  • Viking DMOC205SS - page 9

    7 DMOC205SS VMOC205SS Electrical Requirements The electrical requirements are a 115 -120 volt 60 Hz, AC only, 15 or more amp. fused electrical supply. It is recommended that a separate circuit serving only this appliance be provided. When installing this appliance, observe all applicable codes and ordinances. A short power-supply cord is provided t ...

  • Viking DMOC205SS - page 10

    8 DMOC205SS VMOC205SS OPERA TION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. OFF CONDITION Closing the door activates the door sensing switch and secondary interlock switch. (In this condition, the monitor switch contacts are opened.) When oven is plugged in, 117 volts A.C. is suppl ...

  • Viking DMOC205SS - page 11

    9 DMOC205SS VMOC205SS CONVECTION COOKING CONDITION PREHEATING CONDITION Program desired convection temperature by touching the CONVECTION pad and the Temperature pad. When the START pad is touched, the following operations occur: 1. The coil of shut-off relays (RY1, RY3,RY5 and RY6) are energized, the oven lamp, cooling fan motor, turntable motor a ...

  • Viking DMOC205SS - page 12

    10 DMOC205SS VMOC205SS The sensor “senses” the vapor and its resistance increases gradually. When the resistance reaches the value set according to the menu, supplementary cooking is started. The time of supplementary cooking is determined by experi- ment with each food category and inputted into the LSI. An example of how sensor works: 1 . Pot ...

  • Viking DMOC205SS - page 13

    11 DMOC205SS VMOC205SS Figure O-2. Oven Schematic-Microwave Cooking Condition IMPORTANT: During sensor cooking operation, the fire sensing op- eration sequence will not begin until the AH sensor has SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. COOKING TIME PROGRAMMED. 3. “START” PAD TOUCHED. SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLO ...

  • Viking DMOC205SS - page 14

    12 DMOC205SS VMOC205SS SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CONVECTION PAD TOUCHED. 3. DESIRED TEMP. TOUCHED. 4. COOKING TIME PROGRAMMED. 5. “START” PAD TOUCHED. SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. MIX COOKING PAD TOUCHED. 3. COOKING TIME PROGRAMMED. 4. “START” PAD TOUCHED. 5. RY2 AND RY3 WILL ALTERNATELY CL ...

  • Viking DMOC205SS - page 15

    13 DMOC205SS VMOC205SS THIRD DOOR SWITCH The switch is activated by the latch heads, while the door is closed. When the door is opened, the switch interrupt the circuit to the power transformer. This switch prevents power transformer engaging and microwave when the door opened. THERMISTOR The thermistor is a negative temperature coefficient type. T ...

  • Viking DMOC205SS - page 16

    14 DMOC205SS VMOC205SS TR OUBLESHOOTING GUIDE When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure letter whic h will be found in the “Test Procedure”section. IM ...

  • Viking DMOC205SS - page 17

    15 DMOC205SS VMOC205SS A MAGNETRON B POWER TRANSFORMER C H.V. RECTIFIER ASSEMBLY D HIGH VOLTAGE CAPACITOR E PRIMARY INTERLOCK SWITCH F SECONDARY INTERLOCK SYSTEM G MONITOR SWITCH H MONITOR FUSE E THIRD DOOR SWITCH I THERMAL CUT-OUT J CONVECTION HEATER K THERMISTOR L DAMPER MOTOR M DAMPER SWITCH P TOUCH CONTROL PANEL Q KEY UNIT R RELAY RY-1 R RELAY ...

  • Viking DMOC205SS - page 18

    16 DMOC205SS VMOC205SS TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST HIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE, SO EXTREME CAUTION SHOULD BE OBSERVED. DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check acros ...

  • Viking DMOC205SS - page 19

    17 DMOC205SS VMOC205SS 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 approximatel ...

  • Viking DMOC205SS - page 20

    18 DMOC205SS VMOC205SS Disconnect connector-E from the control unit. Measure the resistance of the thermistor with an ohmmeter. Connect the ohmmeter leads to Pin No’s E-3 and E-4. K THERMISTOR TEST L DAMPER MOTOR TEST If the meter does not indicate above resistance, replace the thermistor Room Temperat ure Resistance 68 ο F(20 ο C) - 86 ο F(30 ...

  • Viking DMOC205SS - page 21

    19 DMOC205SS VMOC205SS P TOUCH 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 tw ...

  • Viking DMOC205SS - page 22

    20 DMOC205SS VMOC205SS S COMPU DEFROST TEST (1) Place one cup of water in the center of the turntable tray in the oven cavity. (2) Close the door, touch the "DEFROST" pad twice and touch the Number pad "5". And then touch the "START" pad. (3) After 2 sec. Now the oven is in DEFROST cooking condition. (4) The oven will ...

  • Viking DMOC205SS - page 23

    21 DMOC205SS VMOC205SS U AH SENSOR TEST Checking the initial sensor cooking condition (1) The oven should be plugged in at least two minutes before sensor cooking. (2) Room temperature should not exceed 95 ο F (35 ο C). (3) The unit should not be installed in any area where heat and steam are generated. The unit should not be installed, for examp ...

  • Viking DMOC205SS - page 24

    22 DMOC205SS VMOC205SS Plunger NC NO COM COM NO NC R3 R4 R1 R2 1 2 3 F-1 F-2 F-3 To connector (F) on Control Unit. CONNECTOR TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST When the AH sensor is defective (open or short), Error will appear in the display after 16 seconds cleaning time. If ERROR appears check sensor wire connections and/or AH sensor ...

  • Viking DMOC205SS - page 25

    23 DMOC205SS VMOC205SS T OUCH CONTR OL P ANEL ASSEMBL Y OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units as shown in the touch control panel circuit. (1) Key Unit (2) Control Unit The principal functions of these units and the signals communicated among them are explained below. Key Unit The key unit is compo ...

  • Viking DMOC205SS - page 26

    24 DMOC205SS VMOC205SS Pin No. Signal I/ O Description 5 AN7 IN Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is an analog input terminal from the AH sensor circuit, and connected to the A/D converter built into the LSI. 6 AN6 IN AH sensor input. This input is an analog input terminal from the AH sensor cir ...

  • Viking DMOC205SS - page 27

    25 DMOC205SS VMOC205SS Pin No. Signal I/ O Description 18 P50 OU T Damper motor relay driving signal. To turn on and off shut-off relay(RY4). 19 P47 OU T Heating element driving signal. To turn on and off shut-off relay(RY3). "L" level during convection cooking; "H" level otherwise. During convection cooking, the signal becomes ...

  • Viking DMOC205SS - page 28

    26 DMOC205SS VMOC205SS Pin No. Signal I/ O Description 37 P23 OU T Segment data signals. The relation between signals and indicators are as follows: Signal Segment Signal Segment Signal Segment Signal Segment P23 ............. P1 P17 ............. P5 P13 ............. P9 P07 ........... P13 P22 ............. P2 P16 ............. P6 P12 ........... ...

  • Viking DMOC205SS - page 29

    27 DMOC205SS VMOC205SS (1) Structure of Absolute Humidity Sensor The absolute humidity sensor includes two thermistors as shown in the illustration. One thermistor is housed in the closed vessel filled with dry air while another in the open vessel. Each sensor is provided with the protective cover made of metal mesh to be protected from the externa ...

  • Viking DMOC205SS - page 30

    28 DMOC205SS VMOC205SS SERVICING Transistor 2SB910M Transistor DTA123ES KRA101M KRA223M KRC243M 1. Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed. CMOS LSI have extremely high impedance at its input and outp ...

  • Viking DMOC205SS - page 31

    29 DMOC205SS VMOC205SS COMPONENT REPLA CEMENT AND ADJUSTMENT PROCEDURE CAUTION: DISCONNECT OVEN FROM POWER SUPPLY BEFORE REMOVING OUTER CASE. DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING AFTER REMOVING OUTER CASE. POWER TRANSFORMER REMOVAL To prevent an electric shock, take the following man- ners. 1. Before wiring ...

  • Viking DMOC205SS - page 32

    30 DMOC205SS VMOC205SS POSITIVE LOCK ® CONNECTOR (NO-CASE TYPE) REMOVAL Push the lever of positive lock ® connector. Pull down on the positive lock ® connector. CAUTION: WHEN YOU CONNECTING THE POSITIVE LOCK ® CONNECTORS TO THE TERMINALS, INSTALL THE POSITIVE LOCK ® SO THAT THE LEVER FACES YOU. Figure C-1. Positive lock ® connector CONVECTION ...

  • Viking DMOC205SS - page 33

    31 DMOC205SS VMOC205SS FAN MOTOR REMOVAL HEATER UNIT ASSEMBLY REMOVAL (HEATING ELEMENT/CONVECTION FAN/CONVECTION MOTOR/THERMISTOR) THERMISTOR REMOVAL 1. Disconnect oven from power supply and remove outer case cabinet. 2. Discharge the high voltage capacitor. Disconnect wire leads from H.V. capacitor and remove four (4) screws holding rear cabinet t ...

  • Viking DMOC205SS - page 34

    32 DMOC205SS VMOC205SS CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL To remove the control panel, procedure as follows: 1. Disconnect oven from power supply and remove outer case. 2. Discharge high voltage capacitor. 3. Disconnect connector CN-A, CN-E and CN-F from the control unit. 4. Disconnect the wire leads from the relays RY1, RY2 and RY3. 5 ...

  • Viking DMOC205SS - page 35

    33 DMOC205SS VMOC205SS DOOR REPLACEMENT AND ADJUSTMENT REMOVAL 1. Disconnect oven from power supply and remove the outer case. Remove turntable tray and turntable support from oven cavity. 2. Remove three (3) screws holding lower oven hinge. 3. Remove the lower oven hinge from oven cavity bottom flange. 4. Remove door assembly from upper oven hinge ...

  • Viking DMOC205SS - page 36

    34 DMOC205SS VMOC205SS 7. Make sure the door is parallel with oven face lines (left and upper side lines) and door latch heads pass through latch holes correctly. 8. Insert the lower oven hinge into oven cavity bottom flange and then engaged the door hinge pin. Then secure the lower oven hinge firmly with tree (3) mounting screws. Note: Aft er any ...

  • Viking DMOC205SS - page 37

    35 DMOC205SS VMOC205SS MICR O W A VE MEASUREMENT PROCEDURE Leakage test: Leakage Test with Enclosure Installed. 1. Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and the body of the oven. 2. Move the probe slowly, not faster than 2.5cm/sec. along the gap, watching for the maximum indication on the met ...

  • Viking DMOC205SS - page 38

    36 DMOC205SS VMOC205SS Figure S-1. Pictorial Diagram 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H TURNTABLE MOTOR GRY BRN ORG GRN PNK BLK DAMPER MOTOR COOLING FAN MOTOR PNK RED CONV. THERMAL CUT-OUT MAGNETRON THERMAL CUT-OUT BLK BLK OVEN THERMAL CUT-OUT RED IC-1 RED 1 2 3 4 5 6 PNK RED GRN WHT PPL 1 2 3 4 5 6 7 8 9 ORG RY1 RY2 RY3 CN-F CN- ...

  • Viking DMOC205SS - page 39

    37 DMOC205SS VMOC205SS Figure S-2. Control Panel Circuit 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H + – + – + – + – + – + – A 9 A 7 A 1 A 3 A 5 E 1 E 2 E 5 E 6 E 3 E 4 F 1 F 2 F 3 N O N O N O COM COM COM VRS1 C1 0.1µ/50v C22 0.1µ/50v C3 0.1µ/50v C5 0.1µ/50v C9 0.01µ/50v C4 10µ/35v C6 10µ/35v C2 1000µ/35v R2 ZD2 ZD3 C1 ...

  • Viking DMOC205SS - page 40

    38 DMOC205SS VMOC205SS 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H Figure S-3. Printed Wiring Board R R 0 1 2 1 31 1 1 1 1 1 65 4 3 2 1 1 135 7 9 45 78 3 3 1 4 58 12 12 12 32 33 64 3 4 6 9 13 CONV HEATER COM RED BRN ORG BLK PINK RED (BRN RED) D25 RY3 RY2 RY1 RY5 RY4 RY6 C11 R10 R11 D31 D30 D24 D23 18 17 16 19 21 22 23 24 14 15 B B B B B E ...

  • Viking DMOC205SS - page 41

    39 DMOC205SS VMOC205SS P AR TS LIST • Refer to "IMPORTANT" described at end of parts list. REF. NO. PART NO. DESCRIPTION Q'TY ELECTRICAL PARTS 1- 1 FACCDA074WRE0 Power supply cord 1 1- 2 FFS-BA012WRK0 Monitor fuse 20A and monitor switch (V-5220D-070) assembly 1 1- 3 FPWBFA293WRK0 Noise filter 1 1- 4 QSW-MA110WRE0 Primary interlock ...

  • Viking DMOC205SS - page 42

    40 DMOC205SS VMOC205SS REF. NO. PART NO. DESCRIPTION Q'TY CODE 4-16 FDUC-A323WRW0 Steam duct assembly 1 A Y 4-17 MCAMPA030WRF0 Damper cam 1 AC 4-18 NSFTTA114WRE0 Damper shaft 1 A B 4-19 FFTA-A034WRK0 Damper door ass’y 1 A M 4-20 PDUC-A269WRW0 Damper duct 1 A K 4-21 PCUSGA398WRP0 Cushion 1 AC 4-22 NCPL-A021WRF0 Turntable coupling 1 A E 4-23 P ...

  • Viking DMOC205SS - page 43

    41 DMOC205SS VMOC205SS REF. NO. PART NO. DESCRIPTION Q'TY CODE 7-11 XBTWW40P06000 Screw; 4mm x 6mm 7 A A 7-12 XCTSD40P08000 Screw; 4mm x 8mm 7 A A 7-13 LX-NZ0029YBE0 Special nut 1 A A 7-14 XBPSD40P06KS0 Screw; 4mm x 6mm 2 A A 7-15 LX-WZA022WRE0 Washer 1 AB 7-16 LX-BZ0531FCZZ Screw; 4mm x 8mm 6 A A 7-17 XCPSD30P06000 Screw; 3mm x 6mm 3 A A 7-18 ...

  • Viking DMOC205SS - page 44

    42 DMOC205SS VMOC205SS OVEN AND CABINET PARTS 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H 1-10 1-11 7-24 2-1 7-24 1-8 2-6 7-12 7-16 A 7-4 7-24 1 - 19 7-24 4-32 7-19 4-33 4 - 41 4 - 15 7-26 1 - 14 7 - 10 TO OVEN B ASE PLATE 7-3 4-8 4-4 4-10 7-1 4-36 4-12 1-15 7-21 7-28 7-27 4-9 7-11 1-5 7-21 7-1 7-14 7 - 24 4 - 31 1 - 13 4 - 30 4-7 7-21 4- ...

  • Viking DMOC205SS - page 45

    43 DMOC205SS VMOC205SS 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H CONTROL PANEL PARTS 5-2 5-9 5-1 5 5-8 5-4 5-8 5-8 5-8 5-5 5-3 5-7 5-6 5-10 VMOC205SS DMOC205SS 5-11 7-24 7-24 3-5 3-4 3-7 3-3 3-2 3-2-1 3-6 3-1 3-2-3 3-7 3-2-2 3-9 3-8 Actual wire harness may be different than illustration. 6-3 6-4 6-5 6-6 6-2 6-1 6-10 6-11 DOOR PARTS MISC ...

  • Viking DMOC205SS - page 46

    44 DMOC205SS VMOC205SS PACKING AND ACCESSORIES 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H 4-3 TURNTABLE TRAY 6-9 OPERATION MANUAL 4-2 TURNTABLE SUPPORT TRAY PACKING FOAM DOOR PROTECTION SHEET MICROWAVE OVEN TOP PAD ASSEMBLY PLASTIC BAG TRAY HOLDER BOTTOM PAD ASSEMBLY Not replaceable items. PACKING CASE 6-15 COOK BOOK 6-14 S/S CLEANING IN ...

  • Viking DMOC205SS - page 47

    45 DMOC205SS VMOC205SS NO TES: ...

  • Viking DMOC205SS - page 48

    46 DMOC205SS VMOC205SS No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher. COPYRIGHT © 2004 BY VIKING ALL RIGHTS RESERVED VIKING RANGE CORPORA TION 111 Front St., Gre ...

Manufacturer Viking Category Microwave Oven

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A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Viking DMOC205SS by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Viking DMOC205SS.

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