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DMOR200SS

WARNING TO SERVICE 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 Voltage Harness etc..

Read the Service Manual carefully and follow all 
instructions.

Before Servicing

.  Disconnect the power supply cord  

,  and  then 

remove outer case.

2.  Open the door and block it open.
3.  Discharge high voltage capacitor.

WARNING: RISK OF ELECTRIC SHOCK. 

DISCHARGE THE HIGH-VOLTAGE 
CAPACITOR BEFORE SERVICING.

The  high-voltage  capacitor  remains  charged  about  60 
seconds after the oven has been switched off. Wait for 
60 seconds and then short-circuit the connection of the 
high-voltage capacitor (that is the connecting lead of the 
high-voltage rectifier) against the chassis with the use of 
an insulated screwdriver. 

Whenever troubleshooting is performed the power supply  
must be disconnected. It may, in some cases, be necessary 
to connect the power supply after the outer case has been 
removed, in this event,
.  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.  Ensure  that  these  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,
.  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  the  leads  to  the  primary  of  the  power 

transformer.

5.  Reinstall the outer case (cabinet).
6.  Reconnect the power supply cord after the outer case 

is installed.

7.  Run the oven and check all functions.

After repairing

.  Reconnect all leads removed from components during 

testing.

2.  Reinstall the outer case (cabinet).
3.  Reconnect the power supply cord after the outer case 

is installed.

4.  Run the oven and check all functions.

Microwave ovens should not be run empty. To test for the 
presence of microwave energy within a cavity, place a cup 
of cold water on the oven turntable, close the door and set  
the power to HIGH and set the microwave timer for two (2) 
minutes. When the two minutes has elapsed (timer at zero) 
carefully check that the water is now hot. If the water remains 
cold carry out Before Servicing procedure and re-examine 
the connections to the component being tested. 

When all service work is completed and the oven is fully 
assembled, the microwave power output should be checked 
and microwave leakage test should be  carried out.

Don't Touch !
Danger High Voltage

Содержание Designer DMOR200SS

Страница 1: ...ONNEL 3 MICROWAVE MEASUREMENT PROCEDURE 4 FOREWORD AND WARNING 5 PRODUCT SPECIFICATIONS 6 GENERAL INFORMATION 6 OPERATION 9 TROUBLESHOOTING GUIDE 13 TEST PROCEDURE 15 COMPONENT REPLACEMENT AND ADJUSTM...

Страница 2: ...should be performed on each oven prior to release to the owner BEFORE SERVICING Before servicing an operative unit perform a microwave emission check as per the Microwave Measure ment Procedure outlin...

Страница 3: ...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 procedur...

Страница 4: ...load of 275 15 ml 9 8 oz of tap water initially at 20 5O C 68O F 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...

Страница 5: ...closed B The door brackets and hinges are not defective C The door 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 wo...

Страница 6: ...ull Power P 0 No power throughout the cooking time KEEP WARM PLUS pad POPCORN pad HOT WATER pad REHEAT pad DEFROST pads Number selection pads REHEAT pads POWER LEVEL pad TIMER CLOCK pad FRESH VEGETABL...

Страница 7: ...es door must 6 be securely closed for the oven to operate Cook and time display 7 LIGHT Hi Lo pad controls 8 interior light Press the LIGHT Hi Lo pad once for Hi Press again for Lo Press a third time...

Страница 8: ...me one touch cooking features such as ADD A MINUTE are disabled after three minutes when the oven is not used These features are automatically enabled when the door is opened and closed or STOP CLEAR...

Страница 9: ...to the stirrer motor the cooling fan motor the turntable motor and the high voltage components are de energized and the digital read out displays the time still remaining in the cook cycle when the do...

Страница 10: ...hrough the right and left sides of the oven cavity then discharged vertically at rear center top of the oven into the customer s vent system 2 HORIZONTAL VENTING The air handing is the same as VERTICA...

Страница 11: ...COM COM MONITOR SWITCH OL GRY HOOD HOOD MOTOR BLU N O HL BLK RED ORG BLK BLK GRY B5 A5 RY4 RY6 RY5 RY3 NC LOW BLK WHT HIGH B7 B9 CAPACITOR A1 A3 B1 B3 RED YLW GRY WHT GRY BLU BLU BRN RED WHT BRN WHT H...

Страница 12: ...ir This cool air is directed through the air vanes surrounding the magnetron and cools the magnetron This air is channelled through the oven cavity to remove steam and vapors given off from the heatin...

Страница 13: ...mes inoperative because of a blown monitor fuse check the monitor switch relay RY1 primary interlock relay RY2 door sensing switch secondary interlock switch and third door switch before replacing the...

Страница 14: ...oes not light in cook cycle But it does light when door is opened Fan motor does not operate Oven lamp and turntable motor operate Turntable motor does not operate Oven lamp lights and fan motor opera...

Страница 15: ...the temperature stabilizes Record the temperature of the water 2 Place the cup of water in the oven Operate oven at POWER 10 HIGH selecting more than 60 seconds cook time Allow the water to heat for...

Страница 16: ...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...

Страница 17: ...nts 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 F SECONDARY INTERLOCK SWITCH AND THIRD...

Страница 18: ...uring 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 J HOOD THERMAL CUT OUT TEST 1 Disconnect the...

Страница 19: ...duct R 5 Disconnect the leads to the primary of the power transformer 6 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 1 Key Unit NOTE 1 Check...

Страница 20: ...en 3 To discharge high voltage capacitor wait for 60 seconds 4 Remove the control panel assembly 5 If the display fails to clear when the STOP CLEAR pad is depressed first verify the flat ribbon cable...

Страница 21: ...TAGE CONNECTED COMPONENTS RY1 Approx 26 6V D C Oven lamp Fan motor Turntable motor RY2 COOK Approx 26 0V D C Power transformer RY3 Approx 26 6V D C Hood motor RY4 Approx 26 6V D C Hood motor RY5 Appro...

Страница 22: ...inished 1 Disconnect the power supply cord and then remove outer case Refer to procedure of HOOD EXHAUST LOUVER REMOVAL REMOVAL OF OVEN FROM WALL and OUTER CASE REMOVAL 2 Open the door and block it op...

Страница 23: ...etween source and source Open Circuit Between load and source Short Circuit Between load and source Short Circuit If incorrect readings are obtained replace the noise filter 6 Reconnect all leads remo...

Страница 24: ...K once the POWER LEVEL pad twice closer the door touch the START pad once open the door touch the number pad 4 once closer door then touch START Now the oven is in the sensor cooking condition and AH2...

Страница 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 X X X X which is the time for detect...

Страница 26: ...n in such a way as to change the resistance values in parallel with R98 R102 of IC2 Changing the resistance values results in that there is the same potential at both F 3 terminal of the absolute humi...

Страница 27: ...wing conditions exist 1 Door does not close firmly 2 Door hinge support or latch hook is damaged 3 The door gasket or seal is damaged 4 The door is bent or warped 5 There are defective parts in the do...

Страница 28: ...cabinet 10 Now the power supply cord is free CAUTION 1 Disconnect oven from power supply before removing outer case 2 Discharge the high voltage capacitor before touching any oven components or wiring...

Страница 29: ...plate the oven cavity front flange and the fan duct And remove the hood intake duct R 5 Disconnect the high voltage wire lead with high voltage rectifier from the magnetron 6 Disconnect filament lead...

Страница 30: ...EMOVAL 5 Disconnect the wire leads from the temperature fuse Magnetron 6 Remove the one 1 screw holding the temperature fuse Magnetron to the fan duct 7 Now the temperature fuse Magnetron is free COOL...

Страница 31: ...block it open 3 To discharge the high voltage capacitor wait for 60 seconds 4 Push the lever of positive lock connector 5 Pull down on the positive lock connector CAUTION When connecting the positive...

Страница 32: ...ove outer case Refer to procedure of RemovalofOvenfromWall and OutercaseRemoval 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Remove the control panel assembly referring to th...

Страница 33: ...door hinge pin 3 Shut the door close the contacts of interlock switches 4 Make sure upper and lower oven hinges are inserted into the upper an lower door hinge pins 5 Make sure the door is parallel wi...

Страница 34: ...0 Now choke cover is free from door panel and door frame NOTE When carrying out any repair to the door do not bend or warp the slit choke tabs on the door panel assembly to prevent microwave leakage D...

Страница 35: ...C COM COM MONITOR SWITCH FUSE HOLDER GRN RED N O COM DOOR SENSING SWITCH RY1 N O RY1 COM RY2 N O RY2 COM HOOD FAN MOTOR 1 2 3 4 5 6 WHT RED YLW BLU BLK WHT RED YLW BLU BLK 1 2 RED GRN 1 2 3 4 5 YLW B...

Страница 36: ...43 DMOR200SS NOTES...

Страница 37: ...l system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher COPYRIGHT 2009 BY VIKING ALL RIGHTS RESE...

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