Power and Signal Distribution

The +12Vsb (auxilary) voltage is always produced by the power supply unit as long as the system is connected to a live AC source. When the PS On signal is asserted, the power supply unit produces the +12 Vmain, +12 Vcpu, and -12 V outputs.

The standard 240-watt and 320-watt power suppies have a 70% minimum efficiency rating at 100% of the rated load, measured while operating from 100 VAC @60 Hz and 230 VAC @ 50 Hz.

The optional high-efficiency 240-watt and 320-watt power supplies operate at the following efficiencies while operating from 100 VAC @60 Hz and 230 VAC @ 50 Hz :

100% of rated load: 85% efficient

50% of rated load: 89% efficient

20% of rated load: 87% efficient

7.3Power Control

System power is controlled through the power button and though external events.

7.3.1 Power Button

Pressing and releasing the power button applies a negative (grounding) pulse to the power control logic on the system board. The resultant action of pressing the power button depends on the state and mode of the system at that time and is described as follows:

 

 

Table 7-3.

 

 

 

Power Button Actions

 

 

 

 

 

 

System State

Pressed Power Button Results In:

 

 

Off

Negative pulse, of which the falling edge results in power control logic

 

 

 

asserting PS On signal to Power Supply Assembly, which then initializes. ACPI

 

 

 

four-second counter is not active.

 

 

 

 

 

 

On, ACPI Disabled

Negative pulse, of which the falling edge causes power control logic to

 

 

 

de-assert the PS On signal. ACPI four-second counter is not active.

 

 

 

 

 

 

On, ACPI Enabled

Pressed and Released Under Four Seconds:

 

 

 

Negative pulse, of which the falling edge causes power control logic to

 

 

 

generate SMI-, set a bit in the SMI source register, set a bit for button status,

 

 

 

and start four-second counter. Software should clear the button status bit within

 

 

 

four seconds and the Suspend state is entered. If the status bit is not cleared by

 

 

 

software in four seconds PS On is de-asserted and the power supply assembly

 

 

 

shuts down (this operation is meant as a guard if the OS is hung).

 

 

 

Pressed and Held At least Four Seconds Before Release:

 

 

 

If the button is held in for at least four seconds and then released, PS On is

 

 

 

negated, de-activating the power supply.

 

 

 

 

 

 

Technical Reference Guide

www.hp.com

7-3

Page 77
Image 77
HP 8100 manual Power Control, Power Button Actions, Pressed Power Button Results, System State

8100 specifications

The HP 8100 series is a line of powerful and versatile printers designed to meet the demanding needs of businesses and offices. Known for its durability and efficiency, the HP 8100 is particularly popular among professionals seeking high-quality prints with fast turnaround times.

One of the standout features of the HP 8100 is its capability to deliver impressive print speeds. With a print speed of up to 60 pages per minute, this printer significantly reduces wait times, allowing businesses to increase productivity. Furthermore, the first page out time is remarkably fast, making it ideal for busy office environments requiring quick document retrieval.

The HP 8100 utilizes HP's advanced LaserJet technology, which ensures sharp and consistent print quality across a range of media types. The printer is capable of producing professional-grade documents with a resolution of up to 1200 x 1200 dpi, making text crisp and images vibrant. This high-quality output is essential for creating marketing materials, reports, and other important documentation.

Another significant characteristic of the HP 8100 is its expandable paper handling capabilities. The printer comes with a standard input tray that accommodates a substantial volume of paper, while optional trays can be added to further increase capacity. This flexibility is particularly beneficial for businesses managing high-volume printing tasks.

The HP 8100 is equipped with a variety of connectivity options, including USB, Ethernet, and wireless capabilities. This versatility allows for easy integration with existing office networks, enabling multiple users to access the printer simultaneously. Additionally, mobile printing features support printing from smartphones and tablets, enhancing convenience for on-the-go professionals.

Energy efficiency is another major advantage of the HP 8100 series. Designed to consume less energy, this printer adheres to energy-saving standards, which can help reduce operational costs for businesses. The printer’s efficiency is complemented by its reliable performance, often with minimal maintenance requirements, ensuring that it remains a staple in the office for years to come.

In the realm of security, HP provides several features to protect sensitive information. Secure printing options and user authentication help safeguard documents, which is crucial for maintaining confidentiality in corporate environments.

Overall, the HP 8100 series stands out for its exceptional print speed, high-quality output, robust connectivity options, and energy efficiency. These characteristics make it an excellent choice for businesses looking to enhance their printing capabilities.