Viking DMOS200 manual

DMOS200 CDMOS200 VMOS200 CVMOS200 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 sever[...]

DMOS200 CDMOS200 VMOS200 CVMOS200 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 sourc[...]

1 CDMOS200 DMOS200 VMOS200 CVMOS200 Notes[...]

2 CDMOS200 DMOS200 VMOS200 CVMOS200 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 Trans- former, Magnetron, High Voltage Rectifier Assem[...]

3 CDMOS200 DMOS200 VMOS200 CVMOS200 MICR O W A VE MEASUREMENT PR OCEDURE (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[...]

4 CDMOS200 DMOS200 VMOS200 CVMOS200 MICRO 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[...]

5 CDMOS200 DMOS200 VMOS200 CVMOS200 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, DMOS200, CDMOS200, VMOS200, [...]

6 CDMOS200 DMOS200 VMOS200 CVMOS200 ITEM DESCRIPTION Power Requirements 120 Volts / 13.0 Amperes/1500Watts 60 Hertz Single phase, 3 wire grounded Power Output 1100 watts (IEC-705 TEST PROCEDURE) Operating frequency of 2450MHz Case Dimensions Width 24" Height 13-3/8" Depth 19-1/8" Cooking Cavity Dimensions Width 17-3/8" 2.0 Cubic[...]

7 CDMOS200 DMOS200 VMOS200 CVMOS200 adapter properly grounded and polarized. If the extension cord must be used, it should be a 3-wire, 15 amp. or higher rated cord. Do not drape over a countertop or table where it can be pulled on by children or tripped over accidentally. CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR RE- MOVE THE ROUND GROUNDING [...]

8 CDMOS200 DMOS200 VMOS200 CVMOS200 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, 120 volts[...]

9 CDMOS200 DMOS200 VMOS200 CVMOS200 SENSOR COOKING CONDITION Using the SENSOR function, food is cooked without figuring time, power level or quantity. When the oven senses enough steam from the food, it relays the information to its microprocessor which will calculate the remaining cooking time and power level needed for best results. When the food[...]

10 CDMOS200 DMOS200 VMOS200 CVMOS200 Figure O-2 Oven Schematic - Cooking Condition Figure O-1 Oven Schematic - Off Condition SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY SCHEMATIC 3. VARIABLE COOKING CONTROL "HIGH" 2. COOKING TIME PROGRAMMED 1. DOOR CLOSED NOTE: CONDITION OF OVEN 4. "START" PAD TO[...]

11 CDMOS200 DMOS200 VMOS200 CVMOS200 DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM The door is opened by pushing the open button on the control panel, refer to the Figure D-1. When the open button is pushed, the open button pushes up the switch lever, and then the switch lever pushes up the latch head. The latch heads are moved upward [...]

12 CDMOS200 DMOS200 VMOS200 CVMOS200 TR OUBLESHOO TING GUIDE Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected. 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 sp[...]

13 CDMOS200 DMOS200 VMOS200 CVMOS200 A MAGNETRON ASSEMBLY 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. TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Home fuse or circuit breaker blows when power cord is plugged into wall receptacle Monitor fuse blows[...]

14 CDMOS200 DMOS200 VMOS200 CVMOS200 B POWER TRANSFORMER 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. Disconnect the primary input terminals and measure the resistance of the transformer with an ohmmeter. Check for continuity of the coils with an oh[...]

15 CDMOS200 DMOS200 VMOS200 CVMOS200 TEST PROCEDURES PROCEDURE LETTER COMPONENT 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 [...]

16 CDMOS200 DMOS200 VMOS200 CVMOS200 TEST PROCEDURES PROCEDURE LETTER COMPONENT 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. Before performing this test, make sure that the primary switch is operating properly, according to the above Switch Test Pro[...]

17 CDMOS200 DMOS200 VMOS200 CVMOS200 H BLOWN MONITOR FUSE TEST TEST PROCEDURES PROCEDURE LETTER COMPONENT 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 monitor fuse is blown when the door is opened, check the primary switch and monitor switch [...]

18 CDMOS200 DMOS200 VMOS200 CVMOS200 The following symptoms indicate a defective 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. If the Key unit is defective. 1) Disconnect the power supply c[...]

19 CDMOS200 DMOS200 VMOS200 CVMOS200 COMPU DEFROST TEST WARNING : The oven should be fully assembled before following procedure. ( 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 and touch the number pad 5 twice. Then touch the start pad. (3) The oven is in Compu Defrost c[...]

20 CDMOS200 DMOS200 VMOS200 CVMOS200 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) Follow the troubleshooting guide given below for repair. STEPS OCCURRENCE CAUSE OR CORRECTION 1 Only pattern at "a" is broken. *Insert jumper wire J1 and solder. [...]

21 CDMOS200 DMOS200 VMOS200 CVMOS200 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Checking the initial sensor cooking condition Warning: The oven should be fully assembled before following procedure. 1) The oven should be plugged in at least two minutes before sensor cooking. 2) Room temperature should not exceed 9 5 o F(35 o C). 3) The unit sho[...]

22 CDMOS200 DMOS200 VMOS200 CVMOS200 CHECKING CONTROL UNIT (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 sensor connector that is mounted to control panel. (5) Then connect the dummy resistor circuit (see fig.) to the sensor connector o[...]

23 CDMOS200 DMOS200 VMOS200 CVMOS200 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST N NOISE FILTER 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. Disconnect the leads to the primary of the power transformer. 5. Using an ohm-meter, check between the t[...]

24 CDMOS200 DMOS200 VMOS200 CVMOS200 T OUCH CONTROL P ANEL ASSEMBL Y OUTLINE OF TOUCH CONTROL PANEL 4 ) Relay Circuit A circuit to drive the magnetron, fan motor, turntable motor and light the oven lamp. 5 ) Buzzer Circuit The buzzer is responsive to signals from the LSI to emit audible sounds (key touch sound and completion sound). 6 ) Synchronizi[...]

25 CDMOS200 DMOS200 VMOS200 CVMOS200 16.7 msec. During cooking H : GND L : -5V LSI(IXA098DR) The I/O signal of the LSI(IXA098DR) is detailed in the following table. Pin No. Signal I/O Description 1 COM5 OUT Common data signal : COM11. Connected to LCD signal COM11. 2 COM4 OUT Common data signal : COM12. Connected to LCD signal COM12. 3 COM3 OUT Com[...]

26 CDMOS200 DMOS200 VMOS200 CVMOS200 3 4 INT0 IN Signal synchronized with commercial power source frequency. This is the basic timing for time processing of LSI. 3 5 P07 O UT Key strobe signal. Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17 terminal while one of G1 line keys on key matrix is touched. 3 6[...]

27 CDMOS200 DMOS200 VMOS200 CVMOS200 4 9 AIN5 IN AH sensor input. This input is an analog input terminal from the AH sensor circuit, and connected to the A/ D converter built into the LSI. 5 0 AIN4 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 c[...]

28 CDMOS200 DMOS200 VMOS200 CVMOS200 103-142 SEG39-SEG0 OUT Segment data signal. Connected to LCD. The relation between signals and LCD are as follows: LSI signal (Pin No.) LCD segment LSI signal (Pin No.) LCD segment SEG 39 (103) .......................... SEG 1 SEG 19 (123) ......................... SEG 21 SEG 38 (104) .......................... [...]

29 CDMOS200 DMOS200 VMOS200 CVMOS200 ABSOLUTE HUMIDITY SENSOR CIRCUIT (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[...]

30 CDMOS200 DMOS200 VMOS200 CVMOS200 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 output terminals. For this reason, it is easily influenced by t[...]

31 CDMOS200 DMOS200 VMOS200 CVMOS200 To remove the outer case, proceed as follows. 1. Disconnect the power supply cord. 2. Open the oven door and block it open. 3. Remove the two (2) screws from the lower portion of the rear cabinet using a T20H Torx type or GTXH20-100 screw driver. 4. Remove the remaining two (2) screws from rear and four (4) scre[...]

32 CDMOS200 DMOS200 VMOS200 CVMOS200 POWER TRANSFORMER REMOVAL Re-install 1. Rest transformer on the bottom plate with its primary terminals toward the oven face plate. 2. Secure transformer with four screws to bottom plate. 3. Re-connect wire leads (primary and high voltage) to power transformer and filament leads of transformer to magnetron and h[...]

33 CDMOS200 DMOS200 VMOS200 CVMOS200 Terminal Push Pull down 1 2 Lever Positive lock¨ connector CONTROL PANEL ASSEMBLY REMOVAL POSITIVE LOCK ® CONNECTOR (NO-CASE TYPE) REMOVAL Figure C-2. Positive lock ® connector 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capaci[...]

34 CDMOS200 DMOS200 VMOS200 CVMOS200 COOLING FAN MOTOR REMOVAL REMOVAL 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 wire leads from the fan motor. 5. Remove the two (2) screws holding the fan motor to the oven cavity back plate. 6. Remove t[...]

35 CDMOS200 DMOS200 VMOS200 CVMOS200 3. Secure latch hook (with two (2) mounting screws) to oven flange. 4. Make sure that the monitor switch is operating properly and check continuity of the monitor circuit. Refer to chapter "Test Procedure" and Adjustment procedure. DOOR SENSING SWITCH/PRIMARY SWITCH/SECONDARY SWITCH AND MONITOR SWITCH [...]

36 CDMOS200 DMOS200 VMOS200 CVMOS200 6. Re-install choke cover to door panel by pushing. Note: After any service to the door; (A) Make sure that door sensing switch and secondary interlock switch are operating properly. (Refer to chapter “Test Procedures”.). (B) An approved microwave survey meter should be used to assure compliance with proper [...]

37 CDMOS200 DMOS200 VMOS200 CVMOS200 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-1. Pictorial Diagram HIGH VOLTA GE CA PA CI TO R HIGH V OL T AG E WI R E A H. V . R E C T IF IE R H I GH V O L T A GE C O M P O N EN T S OVE N LAM P AND S OC KE T MAG NE T R ON COM . MO NI T O R SW I TC H N.C . PRIM A R Y SW I TC H TURNTA BLE MO T O [...]

38 CDMOS200 DMOS200 VMOS200 CVMOS200 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-2 Power Unit Circuit + – + – + – A 1 CN - A R4 2 7 D5 T1 1 3 4 D1 D3 D2 D4 6 ab c d VR S 1 (J 1) D7 D8 1 SS2 7 0 A 1 SS2 7 0 A 10G 471K C 1 0. 1µ/ 50v C 3 0. 1µ/ 50v ZD1 HZ16 -1 C5 1 0 µ / 3 5 v C 2 1000µ/ 35v C 4 10µ/ 35v R1 2 . 4 k 1S S [...]

39 CDMOS200 DMOS200 VMOS200 CVMOS200 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 CPU Unit Circuit C- 10 C- 9 C- 1 C-8 C-12 F-1 F-2 F-3 G 1 G 2 G 3 G 4 G 5 G 6 G 7 G 8 G 9 G10 G11 G12 G13 G14 C-11 C- 3 C- 4 C-2 CN-C GND INT V C LE D V R V A OV E N LA M P TURNTAB L E M OTOR F A N M O TOR B UZZE RR M I CRO NC DOOR SENSING SWITCH N[...]

40 CDMOS200 DMOS200 VMOS200 CVMOS200 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-5 Printed Wiring Board of Power Unit WH - 1 SH - B SH - A 1 C3 C4 C5 R3 C2 F C1 10 D4 D2 D1 D3 (J1) D9 (D10) RY3 (CN - D) D8 ZD1 VRB DU R2 R1 R6 R5 SP1 3 E B D6 D5 Q2 R4 2 6 11 P S RY2 T1 AC VRS1 5 D7 OMIF DU 9 8 7 E Q1 B 4 E RY1 AC OL TTM FM B Q3 (C[...]

41 CDMOS200 DMOS200 VMOS200 CVMOS200 REF. NO. PART NO. DESCRIPTION Q' TY CODE P AR TS LIST Note: The parts marked “ ∆ ∆ ∆ ∆ ∆ ” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V. ∆ ∆ OVEN PARTS 4- 1 PM100013 H.V. Capacitor band 1 A B 4- 2 PM110017 Chassis support 1 A E 4- 3 PM1200[...]

42 CDMOS200 DMOS200 VMOS200 CVMOS200 REF. NO. PART NO. DESCRIPTION Q'T Y DOOR PARTS 5 - 1 PM110003 Door frame assembly (DMOS200) 1 A K 5 - 1 PM110004 Door frame assembly (CDMOS200) 1 A K 5 - 1 PM110001 Door frame assembly (VMOS200) 1 A K 5 - 1 PM110002 Door frame assembly (CVMOS200) 1 A K 5-1-1 PM120001 Latch head 1 A E 5-1-2 PM120007 Latch sp[...]

43 CDMOS200 DMOS200 VMOS200 CVMOS200 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 OVEN AND CABINET PARTS 2-3 4-7 6-11 1-5 4-6 4-8 4-11 7-6 7-2 1-14 4-9 6-10 6-4 6-3 2-1 7-6 1-11 4-10 4-13 7-2 7-2 1-12 1-9 7-3 7-6 7-6 1-8 7-8 7-8 4-2 7-4 1-10 1-3 1-4 7-1 4-4 7-1 4-1 1-1 1-2 2-2 2-2 2-2 2-2 7-5 7-5 4-12 7-5 6-5 4-5 1-13 7-10 7-7 7-10 7-9 7-9[...]

44 CDMOS200 DMOS200 VMOS200 CVMOS200 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 5-1 5-1-2 5-1-1 5-3 5-4 5-2 Actual wire harness may be different from illustration. 6-8 6-2 6-1 3-4 3-2 3-3 3-7 3-7 3-1 3-5 3-6 5-5 5-5 5-6 6-13 5-7 5-7 DOOR PARTS MISCELLANEOUS CONTROL PANEL PARTS[...]

45 CDMOS200 DMOS200 VMOS200 CVMOS200 PACKING AND ACCESSORIES Non-replaceable items. DOOR PROTECTION SHEET PLASTIC BAG PACKING CASE TOP PAD ASSEMBLY INTO THE OVEN CAVITY 6-4 TURNTABLE TRAY 6-3 TURNTABLE SUPPORT 6-7 OPERATION MANUAL BOTTOM PAD ASSEMBLY TRAY HOLDER 6-9 RECIPE CARD[...]

46 CDMOS200 DMOS200 VMOS200 CVMOS200 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 © 2002 BY VIKING ALL RIGHTS RESERVED VIKING RANGE CORPORA TION 111 [...]