Checking the printheads

If the Toolbox is installed on a computer running Windows, you can check the health of the printheads. Replace the printheads when print quality degrades. You can also check the quality by printing a printer configuration page. See Printing a configuration page.

To check the printheads from the Toolbox

1.Open the Toolbox.

2.On the Information tab, click Printhead Health.

3.Check the status of each of the printheads.

4.If the status of one or more printheads is listed as Bad, replace the printhead. See Replacing the printheads.

To check the printheads using a printer configuration page

Print a printer configuration page by holding down the (power button) and pressing the (cancel button) on the printer once. Release the (power button).

Cleaning the printheads

CAUTION: HP is not responsible for damage to the printer that results from modifying the printheads.

If the printed characters are incomplete, or if dots or lines are missing from the printouts, you might need to clean the printheads. This is a symptom of clogged ink nozzles, which are a result of prolonged exposure to air.

Clean the printheads from the Toolbox (Windows) or the HP Inkjet Utility (Mac OS).

Or, follow the procedures below for cleaning the printheads from the control panel.

There are three cleaning levels available. Run the level 1 cleaning. Only run the level 2 cleaning if the results of the first cleaning were unsatisfactory. Similarly, only run the level 3 cleaning if the results of the second cleaning were unsatisfactory.

NOTE: Only clean the printheads when necessary; cleaning the printheads uses ink and shortens the life of the printheads.

To clean the printheads from the Toolbox

1.Open the Toolbox.

2.Click the Printer Services tab.

3.Click Clean Printheads and follow the instructions on the screen.

Maintaining and troubleshooting

Maintaining ink cartridges and printheads 37

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HP 1000 manual Checking the printheads, Cleaning the printheads, To check the printheads from the Toolbox
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1000 specifications

The HP 1000 was a series of minicomputers produced by Hewlett-Packard from the early 1970s through the late 1980s. Originally introduced in 1973, the HP 1000 aimed to provide high-performance computing capabilities within the reach of small to medium-sized businesses and specialized industries. This machine was distinctive not only for its advanced technology but also for the versatility it offered in various applications.

One of the standout features of the HP 1000 was its architecture. The system utilized a 16-bit word size, which allowed for efficient processing and execution of instructions. The HP 1000 employed a unique architecture known as the "Hewlett-Packard 1000 Microprogrammed System," which enabled it to execute a broad range of instructions efficiently. This made the HP 1000 particularly well-suited for data processing applications, scientific calculations, and high-level computing tasks.

The HP 1000 series was fully modular, allowing users to customize and expand their systems as needed. It supported various input/output devices, memory sizes, and even offered options for solid-state disk drives, which were cutting-edge for that time. The system’s modularity not only provided flexibility but also enhanced maintainability, enabling users to swap out components without significant downtime.

Another key aspect of the HP 1000 was its support for a wide range of programming languages, including FORTRAN, COBOL, and BASIC. This made it appealing to a variety of users, from engineers who needed to perform complex calculations to business analysts focused on data management. Additionally, the HP 1000 was designed to run multiple jobs simultaneously, making it a precursor to modern multitasking operating systems.

Networking capabilities were also an essential characteristic of the HP 1000. The system could be connected to various peripherals and terminals, increasing its functionality in a networked environment. This helped businesses leverage the power of shared resources, facilitating collaborative projects and data sharing across departments.

In conclusion, the HP 1000 series played a significant role in the evolution of computing technology. Its modular design, robust architecture, support for multiple programming languages, and networking capabilities made it a versatile tool for a wide range of applications. For over a decade, the HP 1000 series marked an important chapter in the history of computing, laying the groundwork for advancements in minicomputer technology that would follow.
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