Panasonic NE-1022F User Manual

NE-1022F

APH (USA)

ORDER NO.PAPMOSH1201014CE

E10

Microwave Oven

NE-1022F

CONTENTS

Page Page

1 CONTROL PANEL 4

2 SCHEMATIC DIAGRAM

3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING

3.1. Check the grounding

3.2. Warning about the electric charge in the high voltage

capacitor

3.3. Part replacement.

3.4. When the 18 Amp fuse is blown due to the malfunction of

the monitor interlock switch:

3.5. Avoid inserting nails, wire, etc. through any holes in the

unit during operation.

3.6. Verification after repair

4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE

4.1. Magnetron

4.2. Fan motor

4.3. Stirrer motor

4.4. Door assembly

4.5. Floor shelf and/or moving antenna

5 COMPONENT TEST PROCEDURE

5.1. Primary, Secondary Interlock Switch

5.2. Monitor Interlock Switch

5.3. High voltage transformer

5.4. High voltage capacitor

5.5. Magnetron

5.6. Diode

5.7. Protector diode

6 MEASUREMENTS AND ADJUSTMENTS

6.1. Adjustment of primary interlock switch, secondary interlock

switch and monitor interlock switch.

6.2. Measurement of microwave output

7 PROCEDURE FOR MEASURING MICROWAVE ENERGY

LEAKAGE

7.1. Equipment

7.2. Procedure for measuring radiation leakage

7.3. Record keeping and notification after measuremen t

7.4. At least once a year, have the radiation monitor checked

for calibration by its manufacturer.

8 TROUBLESHOOTING GUIDE

8.1. How to check the semiconductors using an OHM meter

9 EXPLODED VIEW AND PARTS LIST

9.1. EXPLODED VIEW

9.2. PARTS LIST

9.3. ESCUTCHEON BASE ASSEMBLY

9.4. DOOR ASSEMBLY

9.5. WIRING MATERIALS

9.6. PACKING AND ACCESSORIES

NE-1022F

1 CONTROL PANEL

2 SCHEMATIC DIAGRAM

NE-1022F

3 CAUTIONS TO BE OBSERVED WHEN

TROUBLESHOOTING

Unlike many other appliances, the microwave oven is high voltage, high current device. Though it is free from danger in ordinary use, extreme care should be taken during repair.

CAUTION

Servicemen should remove their watches and rings whenever working close to or replacing the magnetron.

3.1. Check the grounding

Do not operate on a 2-wire extension cord. The microwave oven is designed to be grounded when used. It is imperative, therefore, to make sure it is grounded properly before beginning repair work.

3.2. Warning about the electric charge in the high voltage capacitor

For about 30 seconds after the oven is turned off, an electric charge remains in the high voltage capacitor.When replacing or checking parts, remove the power plug from the outlet and short the terminal of the high voltage capacitor (terminal of lead wire from diode) to chassis ground with an insulated handle screwdriver to discharge. Please be sure to contact the chassis ground side first and then short to the output terminal.

WARNING

There is high voltage present with high current capabilities in the circuits of the primary and secondary winding and filament winding of the high voltage transformer. It is extremely dangerous to work on or near these circuits with the oven energized. DO NOT measure the voltage in the high voltage circuit including filament voltage of the magnetron.

WARNING

Never touch any circuit wiring with your hand nor with an insulated tool during operation.

3.3. Part replacement.

When troubleshootin g any part of component is to be replaced, always ensure that the power cord is unplugged from the wall outlet.

3.4. When the 18 Amp fuse is blown due to the malfunction of the monitor interlock switch:

WARNING

When the 10 Amp fuse is blown due to malfunction of the short switch, replace all of the components (Primary interlock switch, Secondary interlock switch, Monitor interlock switch).

1. This is mandatory. Refer to “Measurements and

Adjustments” for the location of these switches.

2. When replacing the fuse, confirm that it has the appropriate

rating for these models.

3. When replacing faulty switches, be sure mounting tabs are

not bent, broken or deficient in their ability to hold the switches.

3.5. Avoid inserting nails, wire, etc. through any holes in the unit during operation.

Never insert a wire, nail or any other metal object through the lamp holes on the cavity or any holes or gaps, because such objects may work as an antenna and cause microwave leakage.

3.6. Verification after repair

1. After repair or replacement of parts, make sure that the

screws of the oven, etc. are neither loose nor missing. Microwave energy might leak if screws are not properly tightened.

2. Make sure that all electrical connections are tight before

inserting the plug into the wall outlet.

3. Check for microwave energy leakage.

MICROWAVE RADIATION OF LEAKAGE

USE CAUTION NOT TO BECOME EXPOSED TO RADIATION FROM THE MICROWAVE MAGNETRON OR OTHER PARTS CONDUCTING MICROWAVE ENERGY.

1.The following components have potentials above 2000V while the appliance is operated. * Magnetron * High voltage transformer * High voltage diode * High voltage capacitor Pay special attention to these areas.

2.When the appliance is operated with the door hinges or magnetron installed incorrectly, the microwave leakage can exceed more than 5mW/cm magnetron and the door hinges are is correctly installed.

. After repair or exchange, it is very important to check if the

CAUTION OF

IMPORTANT NOTICE

4 DISASSEMBLY AND PARTS REPLACEMENT

PROCEDURE

NE-1022F

4.1. Magnetron

1. Discharge the high voltage capacitor.

2. Remove 2 screws holding magnetron thermal cutout.

3. Remove 1 screw holding air guide A.

4. Disconnect 2 high voltage lead wires from magnetron filament terminals.

5. Remove 4 screws holding the magnetron.

NOTE:

After replacement of the magnetron, tighten mounting screws properly making sure there is no gap between the waveguide and the magnetron to prevent microwave leakage.

CAUTION

When replacing the magnetron, be sure the antenna gasket is in place.

CAUTION

When connecting 2 filament lead wires to the magnetron terminals, be sure to connect the lead wires in the correct position. The lead wire of high voltage transformer should be connected to "F terminal" and the lead wire from high voltage capacitor should be connected to "FA terminal".

4.2. Fan motor

1. Disconnect 2 lead wires from fan motor terminals.

2. Disconnect 2 lead wires from fuse holder terminals.

3. Disconnect 4 high voltage lead wires from high voltage capacitor terminals.

4. Remove 5 screws holding fan motor and orifice assy, detach the orifice assy with fan motor from oven assy.

5. Remove fan blade from the fan motor shaft by pulling it straight Out.

6. Separate the fan motor from the orifice assy by freeing 2 catch hooks on the orifice assy.

4.3. Stirrer motor

1. Remove the motor cover by breaking off at the 8 spots indicated by arrows with a cutter or the like. (See Figure)

Note:

After breaking off the motor cover, make sure the cut-off portions are properly trimmed off or bend to inside so that no sharp edge will expose to outside.

2. Disconnect 2 lead wires connected to the stirrer motor.

3. Remove the stirrer motor by removing 2 screws.

Note:

To reinstall the motor cover, use 4x6 screw.

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