Bootup

Processor

Memory

Power

Display

Hard disk

Floppy drive

Keyboard

Pointer

Audio

Status

Serial

Parallel

Infrared

PS/2 port

USB

Docking port

PCMCIA

CPU module Motherboard

BIOS IC

Floppy disk module Hard disk drive

CPU module

Motherboard

Motherboard

RAM board

VGA PCA

Battery

Motherboard

DC-DC PCA

AC adapter

Motherboard

LCD module

Inverter PCA

LVDS PCA

VGA PCA

Motherboard Hard disk drive

Motherboard Floppy disk module

Motherboard

BIOS IC

Keyboard

Motherboard

BIOS IC

Keyboard

Top case

Motherboard

VGA PCA Audio jack PCA Inverter PCA Speakers

Motherboard LED strip cable

VGA PCA

Motherboard

Motherboard

Motherboard

IR PCA

Motherboard

Motherboard

Motherboard

Motherboard PCMCIA socket

Table 1-13. Functional Structure

Main processor (MMO). Primary system circuitry.

Code for basic system functions (part of motherboard on OB 4150). First source of disk-based startup code.

Second source of disk-based startup code.

Main processor, numeric data processor, L1 and L2 cache. Primary system circuitry.

No onboard RAM (OB 4150), or first 32 MB of RAM (OB 4100). Changeable RAM (1 slot on OB 4100, 2 slots on OB 4150). Video RAM.

Power storage.

AC adapter socket, power switch, lid switch, system-off switch, power supply.

Power control circuitry. AC-to-dc converter.

PCMCIA/zoomed video controller. Display output, backlight.

Power converter for backlight.

Display drivers, LVDS processing (OB 4100/4150†).

Display/graphics controller, video RAM (OB 4150B: LVDS processing).

Hard disk controller.

Hard disk mechanism.

I/O controller, floppy connector.

Floppy disk mechanism.

Keyboard controller.

Keyboard BIOS (part of motherboard on OB 4150).

Key switches.

Keyboard controller, pointing stick controller (PS/2 output). Keyboard BIOS (part of motherboard on OB 4150). Pointing stick sensor.

Touch pad sensor, controller (PS/2 output).

Audio controller (OB 4100/4150B), audio decoder, speaker amplifier, headphone amplifier, zoomed video controller, mute switch.

Audio controller (OB 4150†). External audio jacks. Microphone.

Speakers.

Keyboard controller, plus keyboard LEDs (OB 4150).

Main LEDs.

Keyboard LEDs (OB 4100).

I/O controller, serial connector.

I/O controller, parallel connector.

I/O controller.

Infrared transmitter/receiver.

Keyboard controller, PS/2 connector.

Bus controller (South Bridge), USB connector.

Docking logic, docking connector.

PCMCIA controller.

PCMCIA connectors.

Models called 4150† in this manual have no marking in the serial number, whereas models called 4150B have 4150 B after the serial number.

HP OmniBook 4100/4150

Product Information 1-15