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Top Case Assemblies
NOTE
4-52
Likewise disconnect the 3 flex circuits from the Main keypad to the
e.
Interface PCA.
4. Flip the top case over rightside up and place it on the bottom case for sup-
port.
5. Remove the Manual Door. See "Manual Door" on page 4-4.
6. Remove the Manual rubber overlay and the membrane switches as fol-
lows:
Using a sharp tool such as a utility knife, carefully pick up one corner
a.
of the rubber overlay and peel the entire overlay off the case. Be
careful not to gouge the case.
Remove the 4 Torx #10 screws now visible around the edge of the
b.
keypad. See Figure 4-27.
Remove the Manual Door shaft and rails. Note the orientation of the
c.
shaft between the rails. If at all possible keep the shaft captured
between the rails.
Using a sharp tool such as a utility knife, carefully pick up one corner
d.
of the membrane switches and peel the entire switch assembly off the
case. Be careful not to gouge the case. The membrane switches will
likely peel apart into several layers - be sure to remove all layers.
7. Turn the top case over and remove the Interface PCA
Remove 2 screws from IRDA PCA. Remove 1 screw from Interface
a.
PCA.
Release retaining clip at end of PCA nearest the IRDA PCA. Use a
b.
small flat bladed screwdriver to gently pry between the clip and the
PCA, levering the PCA up and free of the retaining clip.
IRDA PCA will remain attached to Interface PCA. Do not attempt to
c.
separate them.
Replacement
1. Prepare the case as follows:
Clean off all adhesive residue from the case and manual door rails by
a.
rubbing the dry surface with your finger and 'rolling up' the adhesive.
Lightly scoring the adhesive with a rounded tool will aid removal.
Solvents are ineffective, as is scraping with a sharp tool.
The adhesive used is very difficult to remove. Take your time and do a thor-
ough job to ensure a correct seal with the new switches and overlay.
Clean surfaces thoroughly with isopropyl alcohol (an alcohol wipe is
b.
fine). Allow to dry completely.
2. Install the new membrane switches as follows:
Removal and Replacement
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