Disassembly And Parts Replacement Procedure; Magnetron; Digital Programmer Circuit (Dpc) And Membrane Key; Board - Panasonic NN-S335BF Service Manual

NN-S335BF / NN-S335WF / NN-S335WM /
7 DISASSEMBLY AND PARTS REPLACEMENT
PROCEDURE
7.1.

Magnetron

1. Discharge the high voltage capacitor.
2. Remove 1 screw holding air guide A & reinforce bracket.
3. Disconnect 2 high voltage lead wires from magnetron
filament terminals.
4. Remove 4 screws holding the magnetron.
NOTE:
After replacement of the magnetron,tighten mounting
screws properly in an X pattern, making sure there is
no gap between the waveguide and the magnetron to
prevent microwave leakage.
When replacing the magnetron, be sure the antenna gasket is in
place.
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 volatge transformer should be connected to "F terminal" and
the lead wire from high voltage capacitor should be connected to "FA
terminal".
CAUTION
CAUTION
7.2. 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. Release 1 flat cable from D.P.C board holding on the oven
cavity.
2. Remove 1 screw holding escutcheon base and slide the
escutcheon base upward slightly.
3. Remove 1 screws holding D.P.C board.
4. Separate D.P.C board from tabs on the escutcheon base
and remove D.P.C board.
5. Remove rubber connector.
6. Separate display from tabs on the escutcheon base and
remove display.
To replace membrane key board
7. Push the upper part of key board (display window portion)
from back of escutcheon base, and peel off escutcheon
sheet & membrane key board completely from escutcheon
base.
NOTE:
1. The membrane key board is attached to the
escutcheon base with double faced adhesive tape.
Therefore, applying hot air such as using a hair dryer is
recommended for smoother removal.
2. When installing new membrane key board, make
sure that the surface of escutcheon base is cleaned
sufficiently so that any problems (shorted contacts or
uneven surface) can be avoided.
3. Alignment position of membrane key board is as
follows;
Membrane key board: Right and upper edges
Escutcheon sheet: Right and upper edges
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