8
.
Reinstallation of the Inverter Board is the reverse of steps 1 through 7 above.
6.5.10
Opening/Replacing the Top Case Assembly
To remove/replace the Top Case Assembly, perform the following procedure:
1
.
Remove the Keyboard Assembly and Heat Sink Assembly as described in
Paragraphs 5.5.5 and 5.5.6.
2
.
Remove the four screws that secure the Top Case Assembly to the base. Note that
the screw at the rear of the opening is shorter than the remaining three
screws.
3
.
Using a plastic stick, unlock the ZIF connector located near the glide pad and
remove the cable from the connector.
4
.
Remove the cable cover below the display by lifting upwards on the front edge of
the cover.
5
.
Turn the notebook over and remove the six Phillips-head screws from the bottom
of the notebook.
6
.
Rotate the notebook so that the rear of the unit is facing you; remove the rear
door assembly by bowing it outwards.
7
.
Several recesses are located just above the two rear connectors. Use a small
flat-blade screwdriver to disengage the snaps associated with the right and
left recesses.
8
.
Lift and push the Display Assembly forward to disengage it from the Base
Assembly.
9
.
Replacement of the Top Case Assembly is the reverse of steps 1 through 8 above.
6.5.11
Removing/Replacing the Touch Pad
Assembly
To remove and replace the Touch Pad Assembly, perform the following procedure:
1
.
Remove the Top Case Assembly as described in the previous paragraph.
2
.
Turn the Top Case Assembly over and remove the four screws that secure a metal
shield to the plastics.
3
.
Lift the plastic frame that rests on top of the touch pad.
4
.
Unplug the flex cable from the connector on the touch pad. Note that the board
connector is a LIF (Low insertion force) type; the cable is held in place by
friction.
5
.
Slide the board assembly to the right and remove from the unit.
6
.
Replacement of the Touch Pad Board Assembly is essentially the reverse of Steps
1 through 5 above.
Field Service 6-11
Summary of Contents for Extensa 450 Series
Page 1: ...Maintenance Manual Extensatm 450 Series Notebook Computers 9805725 0001 November 1995 ...
Page 12: ...Figure 1 2 Extensa 450 Series Features 1 4 General Description ...
Page 42: ...Figure 4 1 Notebook Functional Block Diagram 4 2 Theory ...
Page 71: ...Figure 6 5 Touchpad Removal Replacement 6 12 Field Service ...
Page 93: ...Connector Pinouts B 11 ...
Page 100: ...Printed in U S A ...