Viking Professional VMOS200 Service Manual Download

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CDMOS200
DMOS200
VMOS200
CVMOS200

Figure S-5 Printed Wiring Board of Power Unit

WH - 1

SH - B

SH - A

C3
C4

D4
D2
D1

(J1)

(D10)

RY3

(CN - D)

ZD1

VRB

D U

SP1

B D6 D5

RY2

VRS1

OMIF

9 8

RY1

TTM

(CN - C)

CN - C

CN - B

CN - A

Summary of Contents for Professional VMOS200

Page 1: ...URING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY INSIDE FRONT COVER BEFORESERVICING INSIDE FRONT COVER WARNING TO SERVICE PERSONNEL 2 MICROWAVEMEASUREMENTPROCEDURE 3 FOREWORDANDWARNING 5 PRODUCTSPECIFICATIONS 6 GENERAL INFORMATION 6 OPERATION 8 TROUBLESHOOTINGGUIDE 12 TESTPROCEDURE 14 TOUCH CONTROL PANEL ASSEMBLY 24 COMPONENTREPLACEMENTANDADJUSTMENTPROCEDURE 31 PICTORIALDIA...

Page 2: ... a microwave emission check as per the Microwave Measure ment Procedure outlined in this service manual If microwave emissions level is in excess of the specified limit contact Viking Service immediately 1 888 845 4641 If the unit operates with the door open service person should 1 tell the user not to operate the oven and 2 contact VIKING plus the Department Of Health Canada and or the Food and D...

Page 3: ...1 CDMOS200 DMOS200 VMOS200 CVMOS200 Notes ...

Page 4: ...e 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 ca...

Page 5: ...ccurately 4 SetthecookingcontrolonFullPowerCookingMode Closethedoorandselectacookcycleofseveralminutes Ifthewater begins to boil before the survey is completed replace it with 275 ml of cool water C 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...

Page 6: ...in the center of the oven cavity The water container shall be a low form of 600 ml 20 oz beaker with an inside diameter of approx 8 5 cm 3 1 2 in and made of an electrically nonconductive material such as glass or plastic The placing of this standard load in the oven is important not only to protect the oven but also to insure that any leakage is measured accurately 4 Set the cooking control on Fu...

Page 7: ...oor packing is not damaged D The door is not deformed or warped E There is no other visible damage with the oven Servicing and repair work must be carried out only by trained service personnel DANGER Certaininitialpartsareintentionallynotgroundedandpresentariskof electrical shock only during servicing Service personnel Do not contactthefollowingpartswhiletheapplianceisenergized HighVoltageCapacito...

Page 8: ...This oven is equipped with a three prong grounding plug It must be plugged into a wall receptacle that is properly installed and grounded in accordance with the National Electrical Code and local codes and ordinances Intheeventofanelectricalshortcircuit groundingreducestheriskofelectricshockbyprovidinganescapewirefortheelectric current WARNING Improper use of the grounding plug can result in a ris...

Page 9: ...he door is securely closed 3 Removable turntable support 4 Removable turntable The turntable will rotate clockwise or counterclockwise 5 Oven lamp It will light when oven is operating or door is opened 6 Oven door with see through window 7 Ventilation openings Rear 8 Auto Touch control panel 9 Time display Digital display 99 minutes 99 seconds 10 Turn table motor shaft 11 Wave guide cover 12 Power...

Page 10: ...ry switch and secondary interlock relay are activated with the following results The circuits to the turntable motor the cooling fan motor and the high voltage components are de energized the oven lamp remains on and the digital read out displays the time still remaining in the cook cycle when the door was opened 7 The monitor switch electrically monitors the operation of the primary switch and pr...

Page 11: ...Touch one of the SENSOR pads NOTE The oven should not be operated on sensor immediately after plugging in the unit Wait two minutes before cooking on SENSOR 2 The coil of shut off relay RY 1 is energized the turntablemotorareturnedon butthepowertransformer is not turned on 3 After about 16 seconds the cook relay RY 2 is energized The power transformer is turned on microwaveenergyisproducedandfirst...

Page 12: ...PR IMAR Y S WITCH H N NOIS E FILTE R UNIT N O COM DOOR S E NS ING S WITCH NOIS E S UP P R E S S ION C OIL LINE C R OS S C AP AC IT OR 0 22uF AC 250V 0 0033uF AC 125V 0 0033uF AC 125V LINE B Y P AS S C AP AC IT OR LINE B Y P AS S C AP AC IT OR N O COM COM OL 120V AC 60 Hz MONITOR S WITCH H V R E CTIFIE R MAGNE TR ON S E CONDAR Y S WITCH MONIT OR F US E C AV IT Y T E MP F US E MAG NE T R ON T E MP F...

Page 13: ...r switch contacts CAUTION BEFORE REPLACING A BLOWN MONITOR FUSE TEST MONITOR SWITCH AND PRI MARY SWITCH FOR PROPER OPERATION REFERTOCHAPTER TESTPROCEDURE NOTE MONITOR FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY TURNTABLE MOTOR The turntable motor rotates the turntable located on the bottom of the oven cavity so that the foods on the turntable cook evenly during cooking The turntable may tu...

Page 14: ... IMPORTANT Whenever troubleshooting is performed with the power supply cord disconnected It may in some cases be necessary to connect the power supply cord 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 transforme...

Page 15: ...mpletely cooked or not cooked at all at end of cook cycle Oven goes into a cook cycle but extremely uneven heating is produced in oven load food Oven does not cook properly when programmed for Cooking Power 5 mode Operates properly on Cooking Power 10 HIGH mode Oven goes into COMPU DEFROST but food is not defrosted well AH sensor does not end during sensor cooking condition Oven does not shut off ...

Page 16: ...CLE SO EXTREME CAUTION SHOULD BE OBSERVED Power output of the magnetron can be measured by performing a water temperature rise test This test shouldonlybeusedifabovetestsdonotindicateafaultymagnetronandthereisnodefectinthefollowing componentsorwiring siliconrectifier highvoltagecapacitorandpowertransformer Thistestwillrequire a 16 ounce 453cc measuring cup and an accurate mercury thermometer or th...

Page 17: ...ly 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...

Page 18: ...l 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 SECONDARY INTERLOCK SYSTEM TEST DOORSENSINGSWITCH 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 Isolatetheswitchandconnectth...

Page 19: ...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 also the Control Unit is divided into two units LSI Unit and Power Unit and troubleshooting by unit replacement is described according to the symptoms indicated Before testing 1 Disconnect the power supply cord and then remove outer case 2 Open the door and ...

Page 20: ...uch screen sometimes a key produces no signal 2 3 Other possible problems 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 When 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 all leads removed ...

Page 21: ...e between Pin No 1 of the 2 pin connector A and the common terminal of the relay RY1 on the control unit with an A C voltmeter The meter should indicate 120 volts if not check oven circuit RY1 and RY2 Relay Test These relays are operated by D C voltage Check voltage at the relay coil with a D C voltmeter during the microwave cooking operation DC voltage indicated Defective relay DC voltage not ind...

Page 22: ...age capacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure re connect the power supply cord 7 Follow the troubleshooting guide given below for repair STEPS OCCURRENCE CAUSE OR CORRECTION The rated AC voltage is not present between 1 Pin No 1 of the 2 pi...

Page 23: ...illiliters measuring cup 3 Place the container on the center of tray in the oven cavity 4 Close the door 5 Touch the Timer Clock pad once the Power Level pad twice the Start pad once and the number pad once Now the oven is in the sensor cooking condition and TEST SENSOR and COOK will appear in the display 6 The oven will operate for the first 16 seconds without generating microwave energy NOTE ERR...

Page 24: ...ation 9 3 After approximately 25 seconds push plunger of select switch for more than 3 seconds This condition is same as judgement by AH sensor 9 4 After approximately 3 seconds the display shows xx xx which is remaining cooking time and the display count down If the above is not the case the control unit is probably defective If the above is proper the AH sensor is probably defective 10 Disconnec...

Page 25: ...ble MEASURINGPOINT INDICATION OF OHM METER Between N and H Open Circuit Between terminal N and GRY Short Circuit Between terminal H and RED Short Circuit If incorrect readings are obtained replace the noise filter 6 Reconnect all leads removed from components during testing 7 Re install the outer case cabinet 8 Reconnect the power supply cord after the outer case is installed 9 Run the oven and ch...

Page 26: ...he Control Unit consists of Power Unit and LSI Unit Theprincipalfunctionsoftheseunitsandthesignalscommu nicated among them are explained below KeyUnit Thekeyunitiscomposedofamatrix signalsgeneratedinthe LSI are sent to the key unit through P00 P07 Whenakeypadistouched asignaliscompletedthroughthe key unit and passed back to the LSI through P14 P15 P16 P17 AIN6 and AIN7 to perform the function that...

Page 27: ...age to the LSI is input to VSS terminal Connected to VC 19 21 P27 P25 OUT Terminal not used 22 26 P24 P20 IN Used for initial balancing of the bridge circuit absolute humidity sensor 27 P47 IN To input signal which communicates the door open close information to LSI Door close H level signal 0V Door open L level signal 5V 28 P46 OUT Terminal not used 29 P45 OUT Oven lamp fan motor and turntable mo...

Page 28: ... P14 P15 P16 and P17 terminal while one of G6 line keys on key matrix is touched 41 P01 OUT 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 G7 line keys on key matrix is touched 42 P00 OUT 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 G8 ...

Page 29: ...N Power source voltage 5 0V The power source voltage to the LSI is input to VSS terminal Connected to VC 60 NC Terminal not used 61 XIN IN Internal clock oscillation frequency control input setting The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to XOUT terminal 62 NC _ Terminal not used 63 66 AIN3 AIN0 IN Terminal to change cooking input accord...

Page 30: ... 33 109 SEG 7 SEG 13 129 SEG 27 SEG 32 110 SEG 8 SEG 12 130 SEG 28 SEG 31 111 SEG 9 SEG 11 131 SEG 29 SEG 30 112 SEG 10 SEG 10 132 SEG 30 SEG 29 113 SEG 11 SEG 9 133 SEG 31 SEG 28 114 SEG 12 SEG 8 134 SEG 32 SEG 27 115 SEG 13 SEG 7 135 SEG 33 SEG 26 116 SEG 14 SEG 6 136 SEG 34 SEG 25 117 SEG 15 SEG 5 137 SEG 35 SEG 24 118 SEG 16 SEG 4 138 SEG 36 SEG 23 119 SEG 17 SEG 3 139 SEG 37 SEG 22 120 SEG 18...

Page 31: ...change the resistance values in parallel with R107 R111 of IC2 Changing the resistance value results in that there is the same potential at both F 3 terminal of the absolute humiditysensorandAN0terminaloftheLSI Thevoltage of AN1terminalwillindicatabout16secondsabout 2 50 V This initial balancing is set up about 16 seconds after theunitisputintheSensorCookingmode Asthesensor cookingproceeds thefood...

Page 32: ...oven door being closed Connect an external power source to the power input terminal of the touch control panel then it is possible to check and repair the controls of the touch control panel it is also possible to check the sensor related controls of the touch control panel by using the dummy resistor s 3 Servicing Tools Toolsrequiredtoservicethetouchcontrolpanelassembly 1 Soldering iron 30W Itisr...

Page 33: ... FOR WIRING 1 Disconnect the power supply cord 2 Make sure that a definite click can be heard when the microwave oven door is unlatched Hold the door in a closed position with one hand then push the door open button with the other this causes the latch leads to rise it is then possible to hear a click as the door switches operate 3 Visuallycheckthedoorandcavityfaceplatefordamage dents cracks signs...

Page 34: ...e filament lead short one of the power transformer from the high voltage capacitor 7 Remove one 1 screw holding capacitor holder with the high voltage rectifier to the base plate 8 Disconnect rectifier terminal from capacitor High voltage rectifier assembly is now free 9 Remove capacitor holder Capacitor is now free CAUTION WHEN REPLACING HIGH VOLTAGE RECTI FIER AND HIGH VOLTAGE CAPACITOR GROUND S...

Page 35: ... soft cloth not to scratch LSI UNIT NOTE Handle the LSI unit carefully so that there is no excessive force applied to the ribbon connection LSI unit 1 Disconnect the power supply cord 2 Removeturntableandturntablesupportfromovencavity 3 Lay the oven on it s backside Remove the turntable motor cover by snipping off the material in four corners 4 Where the corners have been snipped off bend corner a...

Page 36: ...nstallation Make sure that the axis of the shaft is not slanted 5 Install the fan motor to the the oven cavity back plate with the two 2 screws 6 Connect the wire leads to the fan motor referring to the pictorial diagram Side View Rear View 1 Disconnect the power supply cord and remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect wire leads from the ...

Page 37: ...r should be less than 0 5mm 2 The door sensing switch primary switch and secondary switchinterruptthecircuitbeforethedoorcanbeopened 3 Monitor switch contacts close when door is opened 4 Re install outer case and check for microwave leakage around door with an approved microwave survey meter RefertoMicrowaveMeasurementProcedure DOOR REPLACEMENT REMOVAL 1 Disconnect the power supply cord 2 Push the...

Page 38: ...ts face pressed toward cavity face plate 4 Check for microwave leakage around door with an approvedmicrowavesurveymeter RefertoMicrowave Measurement Procedure Note The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle Thisfunctiondoesnotrequirethatdoorbeair tight moisture condensation tight or light tight...

Page 39: ...R ON T E MP F US E F AN MOT OR R E D B LK B LK 1 OR G OR G B LU R E D B R N P OWE R S UP P LY C OR D 120V 60Hz NOT E T he neutral WHT G R Y wire mus t be connected to the terminal with N mark on the power s upply cord B LK WHT H N NOT E T he grounding conductor of the power s upply cord has been grounded by power s upply cord fixing s crew T he s crew mus t always be kept tight C OM N O DOOR S E N...

Page 40: ...5v C 2 1000µ 35v C 4 10µ 35v R 1 2 4k 1S S 270A 1S S 270A D1 D4 11E S 1 D6 R 5 4 7k R 2 680 1 2w R 3 510 1 2w R 6 3 3k Q2 2S B1238 S P1 PKM22E PT Q1 2S B1238 R Y1 R Y2 Q3 KR C243M CN C 12PIN LE AD WIR E HAR NE S S LE D GND VC VA INT VR BUZZE R MICR O NC NC DOOR S E NS ING S WITCH OVE N LAMP TUR NTABLE MOTOR FAN MOTOR AC AC MICR O DOOR S E NS ING S WITCH OVE N LAMP TUR NTABLE MOTOR FAN MOTOR C10 C ...

Page 41: ...food Power Level Warm Hold 15 Minute Dinners Defrost Help Baked Potatoes Reheat Add A Minute V egetables Rice 1 6 2 7 3 8 4 9 5 0 Poultry Ground Meat Entrees Timer Clock Stop Clear C61 330p 50v C62 330p 50v C63 330p 50v C64 330p 50v C65 330p 50v R75 270k R60 15k R61 15k R62 15k R63 15k R64 15k R65 15k R66 15k R67 15k R76 270k R77 270k R78 270k R79 270k R70 15k R71 15k R72 15k R73 15k R68 15k C 6 C...

Page 42: ...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 D U R2 R1 R6 R5 SP1 3 E B D6 D5 Q2 R4 2 6 11 P S RY2 T1 AC VRS1 5 D7 OMIF D U 9 8 7 E Q1 B 4 E RY1 AC OL TTM FM B Q3 CN C CN C CN B CN A 1 1 9 12 1 1 1 2 XA VH 2 2 ...

Page 43: ... PM100022 Oven lamp 1 AE 1 5 PM100024 Fan motor 1 AR 1 6 PM100004 Monitor switch V 16G 2C25 and fuse assembly 20A 250V AC 1 AF 1 7 PM100019 Secondary interlock switch and door sensing switch V 5230Q 2 AE 1 8 PM100016 Magnetron temperature fuse 150 C 1 AE 1 9 PM100017 Cavity temperature fuse 150 C 1 AF 1 10 PM100026 Magnetron 1 BE 1 11 PM100023 Turntable motor 1 AK 1 12 PM100025 Power transformer 1...

Page 44: ...0006 Turntable support 1 AN 6 4 PM110019 Turntable tray 1 AT 6 5 PM120034 Monitor caution label 1 AA 6 6 PM120018 DHHS Screw caution label 1 AB 6 7 PM120024 Operation manual 1 AF 6 8 PM100020 High voltage wire A 1 AD 6 9 PM120035 Recipe card 1 AC 6 10 PM120036 Menu label 1 6 11 PM120017 DHHS GRD BIK caution 1 AB 6 12 PM120019 Health Canada label 1 AB 6 13 PM120021 User caution label 1 AB 6 14 PM12...

Page 45: ...INET 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 7 7 4 3 1 7 1 7 1 6 1 7 7 5 1 15 4 14 1 6 6 12 6 6 6 14 7 5 ...

Page 46: ... 2 3 6 4 5 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 ...

Page 47: ...ACKING 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 ...

Page 48: ...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 CORPORATION 111 Front St Greenwood MS 38930 Tel 888 845 4641 ...

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