Power and Signal Distribution

7.4Signal Distribution

Table 7-7 lists the reference designators for LEDs, connectors, headers, and switches used on the system boards for systems covered in this guide. Unless otherwise indicated, components are used on all system boards.

 

Table 7-7.

 

 

System Board Component Designations

 

 

 

 

Designator

Component function

Notes

CR1

+5 VDC LED

 

E1

Descriptor table override header

 

E14

SPI ROM boot block header

 

E49 / JP49

Password clear header / jumper

 

J9

Stacked RJ-45 & dual USB connectors

 

J10

Stacked quad USB connectors

 

J20

PCI 2.3 connector

SFF & CMT only

J21

PCI 2.3 connector

CMT only

J22

PCI 2.3 connector

CMT only

J31

PCIe x1 connector

SFF & CMT only

J32

PCIe x1 connector

SFF & CMT only

J41

PCIe x16 graphics connector

SFF & CMT only

J42

PCIe x4 graphics (x16) connector

SFF & CMT only

J50

Parallel port

SFF & CMT only

J68

Stacked keyboard, mouse PS/2 connectors

 

J69

VGA monitor DB-15 connector

 

J78

Stacked audio line-in, headphone/line-out 1/8” jacks

 

J103

DC input

USDT only

P1

Power supply connector

SFF & CMT only

P3

Vccp (PWRCPU) header

 

P5

Control panel (power button, power LED) header

 

P6

Internal speaker header

 

P8

CPU fan header

 

P9

Chassis fan, primary, header

 

P10

Diskette drive connector

SFF & CMT only

P23

Front panel audio header

 

P24

Front panel USB header

 

P52

Serial port, secondary, header

SFF & CMT only

P53

Serial port, primary connector

SFF & CMT only

P54

Serial port, primary header

SFF only

P60

SATA0 (controller 1, primary master) connector (dark blue)

 

P61

SATA1 (controller 1, secondary master) connector (white)

SFF & CMT only

P62

SATA2 (controller 1, primary slave) connector (light blue)

SFF & CMT only

P63

SATA3 (controller 1, secondary slave) connector (orange)

CMT only

P64

SATA4 / eSATA (controller 2, primary master) connector (black)

SFF & CMT only

P124

Hood lock header

SFF & CMT only

P125

Hood sense header

 

P126

Parallel port header

SFF and CMT only

P150

Media reader header

 

P151

Ready boost / dash NIC header

 

 

7-10

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Technical Reference Guide

Page 88
Image 88
HP dc7800 tower manual Signal Distribution, CR1 +5 VDC LED

dc7800 tower specifications

The HP dc7800 Tower is a powerful desktop computer designed for professional and enterprise environments. Known for its stability, performance, and versatility, this model has secured its place in a variety of business settings. Launched in the mid-2000s, it embodies HP’s commitment to quality and innovation.

One of the main features of the HP dc7800 is its form factor. The tower configuration allows for easy upgrades and maintenance, providing ample space for additional hard drives, memory, and other components. This level of accessibility makes it ideal for businesses that need to adapt their systems to changing requirements.

The dc7800 is powered by Intel's Core 2 Duo processors, offering dual-core technology that enhances multitasking capabilities. With clock speeds ranging from 1.8 GHz to 3.0 GHz, this system can handle demanding applications with relative ease. It also supports Intel's vPro technology, which allows for remote management and security features, making it an excellent choice for organizations prioritizing IT control.

Another notable characteristic is the support for up to 8GB of DDR2 RAM. This allows for efficient data processing and improved performance when running multiple applications simultaneously. Additionally, the dc7800 features multiple storage options, accommodating both SATA hard drives and solid-state drives, which can significantly enhance boot times and overall system responsiveness.

Connectivity options on the HP dc7800 are robust. It includes a variety of USB ports, audio jacks, and optional legacy ports, ensuring compatibility with a wide range of peripherals and accessories. Networking capabilities are also prominent, with built-in Gigabit Ethernet providing high-speed internet access.

Furthermore, the desktop tower is designed with energy efficiency in mind. It meets ENERGY STAR certification standards, which not only helps reduce operational costs but also minimizes environmental impact.

Overall, the HP dc7800 Tower embodies a blend of performance, expandability, and energy efficiency, making it a reliable choice for businesses in need of a robust desktop solution. With its legacy of dependability and its suite of modern technologies, it continues to serve as a valuable asset in enterprise environments.