Figure 1-4. Replaceable Module Diagram - HP OmniBook 2100 Service Manual

Internal Design
The motherboard PCA is the central component of the OmniBook design. It plays a role in virtually
all system functions. The CPU module (MMO) and all other subsystems connect to the motherboard.
The following figure shows the connections among the replaceable electrical modules. As a substitute
for a functional block diagram, see the table on page 1-15—it lists the roles that the replaceable
modules play in each of the functional subsystems.
PCMCIA
Cards
CPU
Module
Audio
PCA
Hard Disk
Drive
Keyboard
1-14 Product Information
LCD
Module
Inverter PCA
LVDS
PCA*
Kybd System
BIOS** BIOS**
Motherboard
PCA
RAM
Boards

Figure 1-4. Replaceable Module Diagram

IR
PCA
Top Case
(Touch pad, Speakers,
Microphone)
Icon PCA
USB
PCA
Floppy Drive
or
Plug-In
Module
Main
Battery
Fan
Heatsink
HP OmniBook 2100/3000/3100
The power switch and
the lid switch are
contained on the Icon
PCA.
All external connections
(except USB and IR) are
made to the
motherboard.
* The LVDS PCA is
present only with a 13"
display.
** One BIOS IC on the
OmniBook 2100/3100
contains the system and
keyboard BIOS.