NEC Versa 550 Series Service Manual page 82

The System Top Unit Assembly includes the following major field replaceable units/parts:
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Keyboard Panel Assembly
The keyboard is assembled right on top of the system unit and is connected to
the Motherboard's 26-pin FPC type connector. The keyboard is also secured
to the unit assembly by two retaining latches found on the upper left and right
side of the keyboard.
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LCD Hinge Covers
These parts are basically to cover the LCD hinges and screws that attached
the whole LCD Panel Unit to the System Unit.
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LCD Status Bar
This part or PCB is used to reproduce the LCD icons that indicates the status
of the system's components. This part is assembled also on top of the system
unit found at the upper middle part of the unit. The LCD Status Bar is con-
nected to the Motherboard's 26-pin FPC type connector.
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System Top Unit Cover
This part, besides the keyboard, basically covers the top part of the whole
system unit. The system top cover also provides a wrist-rest surface to where
you can rest your wrist while using the keyboard. The top unit cover is at-
tached to the base unit at the sides which snaps and locks securely.
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Trackball Module Assembly
Also assembled underneath the System Unit Cover is the Trackball module.
This part is used for controlling the pointing device and comprises of the
pointing pad and two button switches. The module is connected to the Moth-
erboard's 6-pin male socket using a long wire cable that also connects to the
GlidePad printed circuit board.
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Top Case Frame Shielding Plate
This part provides EMI shielding protection to the top unit case and is assem-
bled right below the system top unit case.
Field Service Guidelines 4-11