Table 1-13. Functional Structure - HP OMNIBOOK 4100 Service Manual

Bootup CPU module
Motherboard
BIOS IC
Floppy disk module
Hard disk drive
CPU module
Processor
Motherboard
Motherboard
Memory
RAM board
VGA PCA
Battery
Power
Motherboard
DC-DC PCA
AC adapter
Display Motherboard
LCD module
Inverter PCA
LVDS PCA
VGA PCA
Motherboard
Hard disk
Hard disk drive
Motherboard
Floppy drive
Floppy disk module
Motherboard
Keyboard
BIOS IC
Keyboard
Motherboard
Pointer
BIOS IC
Keyboard
Top case
Motherboard
Audio
VGA PCA
Audio jack PCA
Inverter PCA
Speakers
Motherboard
Status
LED strip cable
VGA PCA
Serial Motherboard
Parallel Motherboard
Motherboard
Infrared
IR PCA
PS/2 port Motherboard
Motherboard
USB
Motherboard
Docking port
Motherboard
PCMCIA
PCMCIA socket
† 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

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.
Product Information 1-15