Panasonic NN-A890WB Service Manual page 40

2. Peel away the display window from the inside of the base.
3. Remove the membrane assembly by pushing from the inside of
the base and then peeling away from the outside surface.
NOTE:
1. The escutcheon 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 a new escutcheon key board, make sure that the
surface of the escutcheon base is cleared sufficiently so that
problems such as, shorted contacts and uneven surfaces can be
avoided.
13.4. Low voltage transformer and/or power relays
Note
Be sure to ground your body to discharge any static before
handling the DPC.
1. Using a solder wick or a de soldering tool and a 30W soldering
iron, carefully remove all solder from the terminal pins of the low
voltage transformer and/or power relays.
2. With all of the terminal pins cleaned and separated from the DPC
contacts, remove the defective transformer/power relays and
install the new components making sure that the terminal pins are
inserted completely. Carefully re solder all terminal contacts
carefully.
Figure 5
Removal of DPC DU and DPC AU
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