Table 1-8. 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 cod.

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

 

Switchboard PCA

control circuitry

 

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, Select buttons, controller (PS/2 output)

Audio

Motherboard

Audio controller, audio decoder, speaker amplifier, microphone,

 

 

external

 

Speaker assembly

audio jacks, headphone amplifier, audio-off switch

 

 

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 connector

Wireless LAN

Mini PCI

I/O controller, radio, radio frequency circuitry

(certain

Antenna PCAs

Transmit/receive antennas

models only)

IR PCA

On/off switch, indicator light

LAN

Motherboard

LAN circuitry, bus controller, LAN connector

Modem

Motherboard

Modem circuitry (select models), modem connector

1-24 Product Information

Service Manual

Page 30
Image 30
HP 2163EA, 2500, 2183AF, 2182US, 2182AT, 2182AF, 2180EA, 2180AF, 2180CA, 2179AF, 2178EA, 2158 Functional Structure Description, Usb

2547EA, 2550CA, 2552AI, 2541AH, 2543AH specifications

The HP 2135US is a versatile all-in-one desktop computer designed to meet the needs of home and small office users. This robust machine is particularly attractive for individuals who seek a blend of performance, aesthetics, and user-friendly features.

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