National NN-C781JF, Руководство по обслуживанию

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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
DISCHARGE
HIGH VOLTAGE
CAPACITORS
REMOVE
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.