Panasonic NN-GD39HSZPE / NN-GD38HSZPE / NN-GD37HBZPE Service Manual ▷ View online
4.1. 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.
4.2. 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.
4 DISASSEMBLY AND PARTS REPLACEMENT
PROCEDURE
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NN-GD39HS / NN-GD38HS / NN-GD37HB
2. Disconnect 1 grounding connector from cavity front plate.
3. Disconnect connector CN701 from H.V. inverter.
4.3. Low voltage transformer
and/or power relays (RL1)
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.
4.4. 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-GD39HS / NN-GD38HS / NN-GD37HB
4.5. 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 17).
of the door, reassemble it properly and adjustment
so as to prevent an excessive microwave leakage.
Adjustment of the door assembly (Refer page 17).
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-GD39HS / NN-GD38HS / NN-GD37HB
9. Tighten 2 mounting screws.
Be sure the gap between door E and cavity front plate will
be 0.3~0.7mm.
be 0.3~0.7mm.
NOTE:
Always perform the microwave leakage measurement
test after installation and adjustment of door assembly.
test after installation and adjustment of door assembly.
4.6. Turntable motor
1. Remove the motor cover by breaking off at the 4 spots
indicated by arrows with a cutter or the like.
NOTE:
After removing the motor cover, be sure that cut
portions are properly trimmed off or bent to the
inside so that no sharp edges will be exposed to
outside.
portions are properly trimmed off or bent to the
inside so that no sharp edges will be exposed to
outside.
2. Disconnect 2 lead wires connected to the turntable motor.
3. Remove the turntable motor by removing 1 screw.
3. Remove the turntable motor by removing 1 screw.
NOTE:
After reinstalling the new turntable motor and
reconnecting the 2 lead wires, reinstall the motor
cover by rotating it around 180°, tucking the 2 tabs
under the base into the 2 provided slots, then screw
the single tab to the base using a 4mm x 6mm
screw.
reconnecting the 2 lead wires, reinstall the motor
cover by rotating it around 180°, tucking the 2 tabs
under the base into the 2 provided slots, then screw
the single tab to the base using a 4mm x 6mm
screw.
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NN-GD39HS / NN-GD38HS / NN-GD37HB
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