Panasonic NN-K153WF Service Manual page 33

8.2. Digital programmer circuit (DPC) and membrane key board.
NOTE:
Before handing the DPC ensure that your body is connected to
ground to discharge any electric charge.
1. Disconnect all connectors from D.P.C.
2. Remove 1 screw holding escutcheon base and slide the
escutcheon base upward slightly.
3. Remove 1 screws holding DPC.
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 holder from tabs on the escutcheon base and
remove display holder.
7. Remove display.
To replace membrane key board
8. Push the upper part of key board (display window portion) from
back of escutcheon base and peel off escutcheon sheet and
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
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