Panasonic NN-C781JF Service Manual ▷ View online
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DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE
1. Magnetron
1. Discharge the high voltage capacitors.
2. Remove A screw holding magnetron on bracket.
3. Remove 2 high voltage lead wires.
4. Remove circulation fan motor bracket and belt. (2 screws)
5. Remove air guide. (2 screws)
6. Remove 4 screws holding 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.
NOTE: Magnetron used for this modes is unique type for inverter
power supply system. Make sure to use the one as listed in
the part list.
CAUTION
When replacing the magnetron, be sure the antenna
gasket is in place.
REMOVE
BRACKET
BRACKET
DISCHARGE
HIGH VOLTAGE
CAPACITORS
HIGH VOLTAGE
CAPACITORS
REMOVE
GROUND
WIRE
GROUND
WIRE
08-180M
08-155M
08-150M
2. Digital Programmer Circuit (DPC) and membrane key
board.
NOTE: Be sure to ground any static electric charge built up on
your body, before handling the DPC.
1. Disconnect all connectors from D.P.C.
2. Remove 2 screws holding escutcheon base and slide the
escutcheon base upward slightly with door closed.
3. Release CN5 connector’s lock of DPC by pushing both levers to
inside and pull them upward, and remove flat cable of membrane
key board.
4. Remove 3 screws holding DPC.
To replace membrane key board
5. Remove escutcheon bracket from escutcheon base by freeing 5
catch hooks on the escutcheon base.
6. On some models, the key board is not replaced with individual
parts. Instead, the entire escutcheon base assembly must bu
replaced. Refer to parts list.
NOTE
Magnetron used for this model is unique type for inverter
power supply system. Make sure to use the one as
listed in the part list.
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3. Inverter Power Supply (U)
1. Discharge high voltage capacitors.
2. Remove 2 screws holding magnetron bracket. (Remove grounding
wire)
3. Remove 3 screws holding inverter and fan motor assembly.
4. Unplug 3 connectors of inverter PCB.
5. Remove 2 screws holding inverter PCB on to bracket.
NOTE: Do not pull by lead wires but make sure to pull housing
unless PCB or lead wire may break.
08-154M
08-153M
GROUND
METAL
METAL
RELEASE TAB
TO MAKE FALT
TO MAKE FALT
GROUND METAL
RELEASE TAB
TO MAKE FALT
TO MAKE FALT
08-149M
GROUND WIRE
GROUND METAL
08-181M
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PUSH
DOOR ARM
DOOR
DOOR
SPRING
LEFT
HINGE
CATCH HOOKS
HINGE PIN
HINGE PIN
CUT
TURNTABLE
MOTOR
MOTOR
4. Door assembly
1.
Remove door spring right side.
NOTE: Please hold door unless door become fall down.
2.
Remove door arm lever by pushing tab and turn clock wise.
3.
Remove door spring left.
4.
Insert flat blade screw driver to release hinge pin from left hinge.
5.
Slide out left hinge pin to release the door.
6.
Slide out door arms from the oven to disconnect door assembly.
7.
Remove door arms from the door assembly.
To remove door C
8.
Release catch hooks from hinge pin side.
To remove door E
9.
Remove screws holding door E to door A assembly.
After replacement of the defective component parts of the
door, reassemble it and follow the instructions below for
proper installation and adjustment so as to prevent an
excessive microwave leakage. Adjustment of the door
assembly.
10. When mounting the door to the oven, be sure to adjust, the
door parallel to the oven face plate by moving hinges back or
front.
NOTE: Upper portion of door A should farmly touch to oven
face plate without pushing.
5. Turntable motor
1.
Breaking off at 5 spots indicated by allow with a cutter or like.
2.
Remove 2 screws holding motor cover.
3.
Disconnect 2 lead wires from turntable motor.
4.
Remove 2 screws holding turntable motor.
NOTE: Make sure to remove sharp barrs at 5 spots to avoid
possible injury.
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6. Heater
1.
Remove belt.
2.
Remove 2 lead wires from heater.
3.
Remove 2 screws holding heater and oven temperature
sensor.
4.
Turn right to release hooks to remove heater assembly.
5.
Remove a screw to release heater.
EXHAUST GUIDE
SENSOR MOUNTING PLATE
HOOK
HOOK
SENSOR MOUTING PLATE
METAL
SURFACE
SURFACE
SURFACE OF LEAD WIRE
(WHITE SURFACE)
(WHITE SURFACE)
METAL SIDE
TO DETECT
STEAM
TO DETECT
STEAM
FROM OVEN
CAVITY
CAVITY
7. Steam sensor
1. Remove 1 screw holding steam sensor unit.
2. Disconnect CN2 connector from digital programmer circuit
board.
3. Remove exhaust guide from steam sensor unit.
4. Remove catch hooks on sensor mounting plate and air guide.
5. Remove steam sensor from sensor mounting plate.
NOTE: When installing the steam sensor, make sure that the
direction of steam sensor is as shown in figure.
TO RELEASE
HEATER UNIT
BELT
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