Panasonic NN-GD392SZPE / NN-GD382SZPE Service Manual ▷ View online
5.3. Part replacement.
When troubleshooting any part or component is to be replaced,
always ensure that the power cord is unplugged from the wall
outlet.
always ensure that the power cord is unplugged from the wall
outlet.
5.4. When the 10A fuse is blown
due to the malfunction of the
short switch:
short switch:
WARNING
When the 10A 250V fuse is blown due to the malfunction of
the interlock monitor switch, replace all of the components
(primary latch switch, secondary latch switch, short switch
and power relay RY1).
1. This is mandatory. Refer to “measurements and
the interlock monitor switch, replace all of the components
(primary latch switch, secondary latch switch, short switch
and power relay RY1).
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 the mounting
tabs are not bent, broken or deficient in their ability to
hold the switches.
hold the switches.
5.5. Avoid inserting nails, wire etc.
through any holes in the unit
during operation.
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.
lamp holes on the cavity or any holes or gaps, because such
objects may work as an antenna and cause microwave
leakage.
5.6. 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.
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.
CAUTION OF MICROWAVE RADIATION LEAKAGE
CAUTION OF MICROWAVE RADIATION LEAKAGE
USE CAUTION NOT TO BECOME EXPOSED TO
RADIATION FROM THE MICROWAVE MAGNETRON OR
OTHER PARTS CONDUCTING MICROWAVE ENERGY
RADIATION FROM THE MICROWAVE MAGNETRON OR
OTHER PARTS CONDUCTING MICROWAVE ENERGY
IMPORTANT NOTICE
The following components have potentials above 2000V
while the appliance is operated.
• Magnetron
• High voltage transformer (Located on inverter (U))
• High voltage diodes (Located on inverter (U))
• High voltage capacitors (Located on inverter (U))
Pay special attention to these areas.
When the appliance is operated with the door hinges or
magnetron installed incorrectly, the microwave leakage can
exceed more than 5mW/cm
while the appliance is operated.
• Magnetron
• High voltage transformer (Located on inverter (U))
• High voltage diodes (Located on inverter (U))
• High voltage capacitors (Located on inverter (U))
Pay special attention to these areas.
When the appliance is operated with the door hinges or
magnetron installed incorrectly, the microwave leakage can
exceed more than 5mW/cm
2
. After repair or exchange, it is
very important to check if the magnetron and the door
hinges are correctly installed.
hinges are correctly installed.
5.7. Sharp edges
CAUTION
Please use caution when disassembling or reassembling
internal parts. Some exposed edges may be sharp to the
touch and can cause injury if not handled with care.
internal parts. Some exposed edges may be sharp to the
touch and can cause injury if not handled with care.
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NN-GD392S / NN-GD382S
6.1. Magnetron
1. Discharge the high voltage capacitor.
2. Remove 1 screw holding front plate bracket on cavity top
2. Remove 1 screw holding front plate bracket on cavity top
plate.
3. Remove 2 screws holding air guide A on cavity top plate
and on magnetron.
4. Remove 1 screw holding air guide A on the wave guide,
then remove the air guide A.
5. Remove 1 screw holding thermistor on the magnetron.
6. Remove 2 screws holding the magnetron.
NOTE:
After replacement of the magnetron,tighten mounting
screws properly, making sure there is no gap between
the
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.
place.
6.2. Digital programmer circuit
(D.P.C)
CAUTION:
Be sure to ground any static electric charge built up in
your body before handling the D.P.C..
your body before handling the D.P.C..
1. Disconnect all connectors from D.P.C. board.
6 DISASSEMBLY AND PARTS REPLACEMENT
PROCEDURE
10
NN-GD392S / NN-GD382S
2. Disconnect 1 grounding connector from cavity front plate.
3. Disconnect connector CN701 from H.V. inverter.
6.3. Low voltage transformer
and/or power relays (RY1)
CAUTION:
Be sure to ground any static electric charge built up in
your body before handling the DPC.
your body before handling the DPC.
1. Using solder wick or a desoldering tool and 30W soldering
iron carefully remove all solder from the terminal pins of the
low voltage transformer and/or power relays.
NOTE:
low voltage transformer and/or power relays.
NOTE:
Do not use a soldering iron or desoldering tool of
more than 30 watts on D.P.C. contacts.
more than 30 watts on D.P.C. contacts.
2. With all the terminal pins cleaned and separated from
D.P.C. contacts, remove the defective transformer/power
relays, Replace components making sure all terminal pins
are inserted completely resolder all terminal contacts
carefully.
relays, Replace components making sure all terminal pins
are inserted completely resolder all terminal contacts
carefully.
6.4. DC fan motor
1. Disconnect DC fan motor connect CN15 from DPC board
DU.
2. Remove 2 screws holding orifice assy and detach the orifice
assy from oven assy.
3. Remove 2 screws holding DC fan motor(U) on orifice assy
and detach the fan motor from orifice assy.
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NN-GD392S / NN-GD382S
6.5. Door assembly
1. Support the door, remove 2 screws holding hinge A.
2. Open the door, remove door(U) and hinge A from cavity.
NOTE:
Support the door before opening.
3. Remove door C from door A (U) & door E by carefully
pulling outward starting from upper right hand corner using
a flat blade screwdriver.
a flat blade screwdriver.
4. Separate door E from tabs on door A (U) and remove door
A (U).
5. Remove door key and door key spring from door E.
6. Replace other components.
6. Replace other components.
To re-install components:
NOTE:
NOTE:
After replacement of the defective component parts
of the door, reassemble it properly and adjustment
so as to prevent an excessive microwave leakage.
Adjustment of the door assembly (Refer page 18).
of the door, reassemble it properly and adjustment
so as to prevent an excessive microwave leakage.
Adjustment of the door assembly (Refer page 18).
7. Place the hole of hinge A into the door’s upper hinge pin.
8. Use your left index finger to support the door’s lower hinge
pin while guiding the door’s hinge A into the cavity slot.
Then lower your finger to seat the door onto the hinge.
Then lower your finger to seat the door onto the hinge.
NOTE:
Door alignment is crucial. If door is misaligned,
apply pressure until alignment is achieved.
apply pressure until alignment is achieved.
NOTE:
Adjust so that the upper portion of the door will
touch firmly to the oven cavity front plate, without
pushing the door. If the door assembly is not
mounted properly, microwave power may leak from
the clearance between the door and oven.
touch firmly to the oven cavity front plate, without
pushing the door. If the door assembly is not
mounted properly, microwave power may leak from
the clearance between the door and oven.
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NN-GD392S / NN-GD382S
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