Kleenmaid MWG4511 Service Manual Download Page 19 | Manualshive

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4.3 Troubleshooting plan - Oven does not operate at all

2. Fuse does not

blow.

No continuity.

No continuity.

Replace power
supply cord.

Defective mag-
netron thermostat.

Defective power
supply cord.

Replace mag-
netron thermostat.

Check continuity
of magnetron
thermostat.

Check continuity
of power supply
cord.

Continuity.

No continuity.

Defective
oven thermostat.

Replace
oven thermostat.

Check continuity
of oven
thermostat.

Continuity.

CONDITION

CHECK

RESULT

CAUSE

REMEDY

Page 18

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Summary of Contents for MWG4511

Page 1: ...Cover Page MICROWAVE OVEN SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL...

Page 2: ...ate at all Troubleshooting plan 1 Troubleshooting plan output power is low 20 2 Page 1 2 2 1 2 2 2 3 2 4 2 5 3 3 3 3 4 3 5 3 6 3 7 3 8 4 4 1 4 2 4 3 4 4 4 5 4 6 Outer Case Power Supply Cord 10 Control...

Page 3: ...ce When repairs are complete conduct a test in accordance with VDE 0701 or national regulations When repairs are complete conduct a function test When repairs are complete conduct a leak rate test 1 2...

Page 4: ...well as the measurement conditions have been specified in the VDE regulation 0700 Part 25 and are as follows The limiting values for the permitted measured values as well as the measurement conditions...

Page 5: ...ode Blocking direction infinite The high voltage diode can be tested like a standard diode Use an EHG tester for this Full continuity in conducting direction Infinite in blocking direction Set to insu...

Page 6: ...urement range 20 A correctly functioning capacitor indicates transient continuity The resistance then increases proportionally with the load A defective capacitor e g short circuit indicates permanent...

Page 7: ...ltage for the magnetron and the operating voltage for doubling the voltage Input voltage 230 V Heater voltage approx 3 3 V Operating voltage approx 2300 V The operating voltage cannot be measured Heat...

Page 8: ...asure the resistance with an EHG tester Note An internal flashover short circuit between cathode and anode cannot usually be established by taking a measurement This is not indicated until the applian...

Page 9: ...nction of these switches is to interrupt microwave generation as soon as the door is opened One of the three switches is the short circuit switch It monitors one of the two other switches and actuates...

Page 10: ...ull the Microwave oven out 3 Remove the screws holding the Trim Assembly to the Cavity Caution Discharge the high voltage capacitor before testing Page 9 Installation Hole Screw B Assembly 3 2 Removin...

Page 11: ...must be moved backward to be lifted off 3 5 Removing Control Panel Assembly 1 Disconnect the leadwire from the PCB sub assemble 2 Remove the screws for securing the control panel 3 Lift control panel...

Page 12: ...voltage capacitor 2 Disconnect the leadwire from magnetron high voltage transformer and capacitor 3 Remove the screw holding the high voltage transformer to the baseplate 3 9 1 Discharge the high volt...

Page 13: ...ng the magnetron and the waveguide 4 Remove the magnetron until the tube is clear from the waveguide Waveguide Magnetron Gasket Magnetron Dome Waveguide Bracket Magnetron 3 12 Removing PCB Assembly 1...

Page 14: ...utting 5 Disconnect the leadwire from the turntable motor terminals 6 Remove the screw securing the turntable motor to the oven cavity assembly 7 After replacing the motor rotate the removed turntable...

Page 15: ...age circuit 3 Discharge the high voltage capacitor See page 2 4 When checking the continuity of the switches or of the high voltage transformer disconnect one lead wire from these parts and then check...

Page 16: ...etc Uneven cooking Ceramic ware trimmed in gold or silver powder is used Avoid using other electrical appliances when you use the microwave oven Insert microwave oven plug securely Use the microwave...

Page 17: ...Everything works as specified Still have trouble Defective key membrane assembly Replace key membrane assembly Replace key membrane assembly and check operation 3 Display shows a number or figure dif...

Page 18: ...the high voltage capacitor and operate the unit No continuity Continuity Shorted contact at the primary switch Fuse blows again Normal Defective high voltage capacitor Replace high voltage capacitor D...

Page 19: ...ective mag netron thermostat Defective power supply cord Replace mag netron thermostat Check continuity of magnetron thermostat Check continuity of power supply cord Continuity No continuity Defective...

Page 20: ...otor or oven lamp do not turn on No continuity continuity No continuity Continuity Check the con nection between connector and P C B assembly Defective secondary switch Replace secondary switch Check...

Page 21: ...sure the output power Disconnect the wire leads from on and off time with multitester Defective P C B assembly Replace P C B assembly Decrease in power source voltage with load Suggest customer contac...

Page 22: ...med for the set power level Operates properly in HIGH Output is full when you set lower power level Abnormal Defective P C B assembly Replace P C B assembly Disconnect the wire leads from Operate the...

Page 23: ...Abnormal Malfunction the thermostat Replace Thermostat and No continuity Open or loosen Replace or connect tightly Wire connection NOTE Make sure the wore leads correct position When removing the wir...

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