3. Remove 2 screws holding D.P.C. board DU (Relay board).
4. Remove flat cable from CN13 on D.P.C board DU by pulling
it out slightly.
5. Remove all screws holding D.P.C board AU (Display & Dial
board)
6. Separate D.P.C board from tabs on the escutcheon base
and remove D.P.C board.
To replace membrane key board
7. Use tools such as kinfe etc. to lift the edge of membrane
sheet and peel off escutcheon sheet & key board
membrane completely from escutcheon base.
NOTE:
a. 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.
b. When installing the new key board membrane, make
sure that the surface of escutcheon base is clean to
prevent a malfunction or shorted contacts.
14
NN-CF770M
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