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Table 1-9. Functional Structure Description
Bootup
CPU module
Motherboard
Hard disk drive
Floppy drive
Main processor (MMO).
Primary system circuitry, system BIOS.
First source of disk-based startup code.
Second source of disk-based startup code.
Processor
CPU module
Motherboard
Main processor, numeric data processor, L1 and L2 cache.
Primary system circuitry.
Memory
Motherboard
SDRAM module
Video RAM (XE4500).
Changeable SDRAM (2 slots), video RAM (XE4100).
Power
Battery
Motherboard
Switchboard PCA
AC adapter
Power storage.
AC adapter socket, reset button, lid switch, power supply, power
control circuitry.
Power button.
AC-to-DC converter.
Display
Motherboard
SDRAM module
Display assembly
Graphics controller, video RAM.
Display output, backlight, power converter for backlight.
Hard disk
Motherboard
Hard disk drive
Hard disk controller.
Hard disk mechanism.
Floppy drive
Motherboard
Floppy drive
I/O controller, floppy connector.
Floppy drive mechanism.
Keyboard
Motherboard
Switchboard PCA
Keyboard
Keyboard BIOS, keyboard controller.
Power switch, one-touch buttons.
Key switches.
PS/2
TouchPad
Motherboard
Top case
Keyboard circuitry, keyboard controller, keyboard BIOS.
Touch pad sensor, click buttons, controller (PS/2 output).
Audio
Motherboard
Speaker assembly
Audio controller, audio decoder, speaker amplifier, microphone,
external audio jacks, headphone amplifier, audio-off switch.
Speakers.
Status
Motherboard
Switchboard PCA
Top case
LED circuitry, keyboard controller.
Keyboard LEDs.
Main status LEDs.
Serial
Motherboard I/O controller, serial connector.
Parallel
Motherboard I/O controller, parallel connector.
Infrared
Motherboard
IR PCA
I/O controller.
Infrared transmitter/receiver.
PS/2 port
Motherboard PS/2 connector, keyboard controller.
USB
Motherboard Bus controller (South Bridge), USB connector.
S-Video
Motherboard I/O controller, S-video connector (certain models).
Port Replicator
Motherboard Port replicator logic, port replicator connector (certain models).
PCMCIA
Motherboard
PCMCIA socket
PCMCIA controller.
PCMCIA connectors.
Wireless LAN
(certain models)
Mini-PCI
Antenna PCAs
IR PCA
I/O controller, radio, radio frequency circuitry.
Transmit/receive antennas.
On/off switch, indicator light.
LAN
Motherboard LAN circuitry, bus controller, LAN connector.
Modem
Motherboard Modem circuitry (certain models), modem connector.
Service Manual Product Information 1-65