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R

MICROWAVE OVEN
SERVICE MANUAL

MODEL: 17260

CAUTION

BEFORE SERVICING THE UNIT,READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.

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Summary of Contents for 17260

Page 1: ...R MICROWAVEOVEN SERVICEMANUAL MODEL 17260 CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL...

Page 2: ...and other damage 4 damage to or loosening of hinges and latches 5 evidence of dropping or abuse C Before turning on microwave power for any service test or inspection within the microwave generating...

Page 3: ...CIRCUIT DESCRIPTION 4 4 SERVICE INFORMATION 5 1 TOOLS AND MEASURING INSTRUMENTS 5 1 MICROWAVE LEAKAGE TEST 5 1 MEASUREMENT OF MICROWAVE POWER OUTPUT 5 3 DISASSEMBLY AND ADJUSTMENT 5 3 INTERLOCK CONTI...

Page 4: ...pprox 18 kg approx Microwave Power for Variable Cooking Power level MAX Full power throughout the cooking time MED HIGH approx 80 of Full power MEDIUM approx 60 of Full power DEFROST approx 40 of Full...

Page 5: ...ron be assembled to the waveguide and cavity Never operate the magnetron unless it is properly installed Be sure that the magnetron gasket is properly installed around the dome of the tube whenever in...

Page 6: ...o prevent interference 8 Do not touch the front glass during or after cooking of the Grill and Combination mode This glass is very hot during heater operating 9 Do not operate the oven at microwave an...

Page 7: ...od quantity and toast bagel baking level 9 EZ ON Touch this button to cook at 100 cook power for 1 minute to 99 minutes 59 seconds 10 STOP CLEAR Touch this button to stop the oven or clear entries 11...

Page 8: ...WO STAGE COOKING 7 AUTO WEIGHT DEFROST 8 AUTO COOK 9 CHILD LOCK This oven has a CHILD LOCK feature TO SET CHILD LOCK Touch the Parar Borrar pad Touch START pad L appear in the display TO CANCEL CHILD...

Page 9: ...SCHEMATIC DIAGRAM 4 3...

Page 10: ...DC is applied to the filament of the magnetron WHEN THE OVEN IS SET AT ANY LEVEL EXCEPT MAXIMUM The micom controller controls the ON OFF time of relay 3 by the applied signal to vary the average outpu...

Page 11: ...ch is graduated to 600 cc and place the beaker on the center of the turntable Set the energy leakage monitor to 2 450 MHz and use it following the manufacturer s recommended test procedure to assure c...

Page 12: ...e test probe must be removed no faster than 1 inch sec 2 5 cm sec along the shaded area otherwise a false reading may result The test probe must be held with the grip portion of the handle A false rea...

Page 13: ...ure is 5 K The microwave power output P in watts is calculated from the following formula 4187 X T 0 55 X T2 T0 X M T T2 Temperature after heating T0 Temperature after bowl M Weight of bowl is measure...

Page 14: ...SFORMER REMOVAL 1 Discharge the high voltage capacitor 2 Disconnect the leadwire from magnetron high voltage transformer and capacitor 3 Remove the screw holding the high voltage transformer to the ba...

Page 15: ...ml water load Make sure that gasket is rigidly attached to the magnetron To prevent microwave leakage tighten the mounting screws properly making sure there is no gap between the waveguide and the ma...

Page 16: ...DJUSTMENT OF THE LATCH BOARD TO THE OVEN ASSEMBLY Mount the latch board to the oven assembly Adjust the latch board in the arrow direction so that oven door will not have any play in it when the door...

Page 17: ...closed meter should indicate an closed circuit When the secondary switch operation is abnormal make the necessary adjustment or replace the switch only with the same type of switch C MONITOR SWITCH TE...

Page 18: ...LTS HIGH VOLTAGE TRANSFORMER Wire leads removed MAGNETRON Wire leads removed 1 Measure the resistance Ohm meter scale Rx1 and Rx100 Primary winding Secondary winding Filament winding 2 Measure the res...

Page 19: ...Terminal to case Measure the continuity Forward Ohm meter scale Rx10000 Measure the continuity Reverse Ohm meter scale Rx10000 Normal Momentarily indicates several ohms and then gradually returns to i...

Page 20: ...lti meter Measure the resistance with 500V 100M ohm insulation resistance meter NOTE Make sure heater is fully cooled when tested NOTE If the fuse is blown check the primary the secondary and the moni...

Page 21: ...eral ohm Normal Approx 2 5 3 5 kohm Abnormal Infinite or several ohm Check for P C B connector Measure the resistance Ohm meter scale R x 1 Cooking Start OFF Cooking Start OFF 1 3 5 Relay 3 Relay 1 Re...

Page 22: ...on this panel to discharge any static charge built up in your body Micom model only CONDITION Toaster and Microwave oven does not work Inserting many plugs into one outlet and using them at the same t...

Page 23: ...ime while counting down 9 Display counts down too fast while cooking 10 Each indicator light does not turn on after setting cooking cycle 11 Display time of day does not reappear when cooking is finis...

Page 24: ...continuity Normal Defective high voltage capacitor Replace high voltage capacitor Fuse blows again Defective high volt age transformer Replace high volt age transformer Malfunction of the monitor swi...

Page 25: ...Replace oven lamp Loose connection Connect them tightly CONDITION CHECK RESULT CAUSE REMEDY Output is low Lower than 90 of rating voltage Normal Normal Abnormal Abnormal Measure the output power Disco...

Page 26: ...capacitor Replace high voltage capacitor Check high vol tage capacitor Abnormal Defective magnetron Replace magnetron Check magnetron TROUBLE 5 No microwave oscillation even though oven lamp and fan m...

Page 27: ...r Replace toaster Assembly Defective thermistor Replace thermistor Check continuity of thermistor Defective PCB assembly Replace PCB Assembly No continuity Loose connection Connect them tightly Attach...

Page 28: ...INTERIOR PARTS OVEN CAVITY PARTS BASE PLATE PARTS LATCH BOARD PARTS DOOR PARTS TOASTER PARTS 6 1 EXPLODED VIEW INTRODUCTION EV...

Page 29: ...6 2 13536A 13552A 13213A 13581A 14890A 14970A 14026A 15006A 268712 250202 250201 WTP004 13551A 249401 23790D DOOR PARTS EV...

Page 30: ...6 3 33052A 33112U 33390G 35889A 34370T 36549S WTP013 WTT010 WTT021 OVEN CAVITY PARTS EV...

Page 31: ...6 4 43500A 466001 466003 466001 44510A 55262A 56912B WSZ085 LATCH BOARD PARTS EV...

Page 32: ...6 5 568771 56930V 56411A 50FZZA WSZ002 WTT024 WTT028 WSZ002 WSZ002 WTT028 WSZ002 WTT037 56324A 54810C 50CZZH 56851D 56549F 54974S 268711 55900A 56201A INTERIOR PARTS EV...

Page 33: ...6 6 56170D WSZ002 WTT021 WTT028 647781 65006A 63302A WTT021 BASE PLATE PARTS EV...

Page 34: ...6 7 76322A 76930V WTT021 WTT028 WTT021 74510L 766001 73551B 75993M 73213A 73552A 73551A 73550L 74970A 73740A 768711 WTP004 TOAST PARTS EV...

Page 35: ...8 1 SCHEMATIC DIAGRAM OF P C B...

Page 36: ...8 2 PRINTED CIRCUIT BOARD...

Page 37: ...8 3 PRINTED CIRCUIT BOARD...

Page 38: ...R P NO 3828W5S5209 April 2005 Printed in Korea...

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