Table 1-9. Functional Structure Description

Bootup

CPU module

Main processor (MMO).

 

Motherboard

Primary system circuitry, system BIOS.

 

Hard disk drive

First source of disk-based startup code.

 

Floppy drive

Second source of disk-based startup code.

Processor

CPU module

Main processor, numeric data processor, L1 and L2 cache.

 

Motherboard

Primary system circuitry.

Memory

Motherboard

Video RAM (XE4500).

 

SDRAM module

Changeable SDRAM (2 slots), video RAM (XE4100).

Power

Battery

Power storage.

 

Motherboard

AC adapter socket, reset button, lid switch, power supply, power

 

 

control circuitry.

 

Switchboard PCA

Power button.

 

AC adapter

AC-to-DC converter.

Display

Motherboard

Graphics controller, video RAM.

 

SDRAM module

Display output, backlight, power converter for backlight.

 

Display assembly

 

Hard disk

Motherboard

Hard disk controller.

 

Hard disk drive

Hard disk mechanism.

Floppy drive

Motherboard

I/O controller, floppy connector.

 

Floppy drive

Floppy drive mechanism.

Keyboard

Motherboard

Keyboard BIOS, keyboard controller.

 

Switchboard PCA

Power switch, one-touch buttons.

 

Keyboard

Key switches.

PS/2

Motherboard

Keyboard circuitry, keyboard controller, keyboard BIOS.

TouchPad

Top case

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

Audio

Motherboard

Audio controller, audio decoder, speaker amplifier, microphone,

 

 

external audio jacks, headphone amplifier, audio-off switch.

 

Speaker assembly

Speakers.

Status

Motherboard

LED circuitry, keyboard controller.

 

Switchboard PCA

Keyboard LEDs.

 

Top case

Main status LEDs.

Serial

Motherboard

I/O controller, serial connector.

Parallel

Motherboard

I/O controller, parallel connector.

Infrared

Motherboard

I/O controller.

 

IR PCA

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 controller.

 

PCMCIA socket

PCMCIA connectors.

Wireless LAN

Mini-PCI

I/O controller, radio, radio frequency circuitry.

(certain models)

Antenna PCAs

Transmit/receive antennas.

 

IR PCA

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

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Image 71
HP 2504AT, 2500, 2186AF, 2183AF, 2182AT, 2182AF, 2180EA, 2180AF, 2180CA, 2179AF, 2178EA, 2178CL Functional Structure Description

2547EA, 2552AI, 2541AH, 2543AH, 2561AI specifications

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