Question 1

What does error code 79:04 mean on my HP DesignJet?

Accepted Answer

Error 79:04 is a critical firmware error indicating an unrecoverable problem with the printer's operating system. The printer cannot function until this is resolved.

Question 2

How do I fix a paper jam on my DesignJet printer?

Accepted Answer

To fix a paper jam (error 86:01), turn off the printer, open all access panels, and carefully remove any jammed paper. Check for torn pieces that may be stuck in the paper path.

Question 3

How often should I replace my DesignJet printheads?

Accepted Answer

DesignJet printheads typically last 6-18 months depending on usage volume, print modes used, and maintenance habits. Replace them when print quality degrades despite cleaning cycles.

Question 4

Can I use third-party ink in my DesignJet printer?

Accepted Answer

While third-party inks may work, HP strongly recommends using genuine HP inks. Third-party inks can cause printhead clogging, color inaccuracy, and may void your warranty.

Question 5

What is the difference between DesignJet T-Series and Z-Series?

Accepted Answer

The T-Series is designed for technical/CAD applications with precise line quality, while the Z-Series targets graphic arts with superior color accuracy and wider gamut.

Question 6

How do I update the firmware on my DesignJet?

Accepted Answer

Firmware can be updated through the front panel (if connected to the internet), via USB drive with the firmware file downloaded from HP's website, or through HP Smart Device Services.

Question 7

Why is my DesignJet printing with banding or lines?

Accepted Answer

Banding is usually caused by clogged printhead nozzles, incorrect paper advance calibration, or using the wrong media type setting. Run printhead cleaning and calibration routines first.

Question 8

What should I do if my DesignJet won't turn on?

Accepted Answer

Check the power cable connection, try a different outlet, and verify the power switch is in the ON position. If it still won't power on, the power supply unit may need replacement.

Question 9

How do I calibrate my DesignJet for accurate colors?

Accepted Answer

Use the built-in color calibration routine accessible through the front panel under Image Quality Maintenance. For Z-Series printers, use the built-in spectrophotometer for automatic calibration.

Question 10

What media types can I use with my DesignJet?

Accepted Answer

DesignJet printers support a wide range of media including plain paper, coated paper, photo paper, canvas, vinyl, film, and specialty media. Check your model's specifications for supported types.

Question 11

How long does a DesignJet printer typically last?

Accepted Answer

With proper maintenance, a DesignJet printer can last 5-10 years or more. High-volume production models may require major component replacements after 3-5 years of heavy use.

Question 12

What is the cost of DesignJet printer repair?

Accepted Answer

Repair costs vary widely: simple fixes like printhead replacement cost $100-300, while major repairs like Main PCA replacement can cost $500-1500+ including parts and labor.

Question 13

Can I repair my DesignJet printer myself?

Accepted Answer

Some basic maintenance tasks (printhead replacement, cleaning, firmware updates) can be done by users. However, internal component repairs should be performed by certified technicians.

Question 14

How do I connect my DesignJet to Wi-Fi?

Accepted Answer

Navigate to Setup > Connectivity > Wireless on the front panel. Select your Wi-Fi network, enter the password, and the printer will connect. Ensure your router supports the printer's Wi-Fi standard.

Question 15

What does 'System Error' mean on my DesignJet?

Accepted Answer

A 'System Error' is a general category of critical errors indicating a hardware or firmware malfunction. The specific error code following 'System Error' identifies the exact component affected.

Question 16

How do I clean my DesignJet printer?

Accepted Answer

Regular cleaning includes: wiping the exterior, cleaning the platen with a lint-free cloth, cleaning the encoder strip, and running the built-in printhead cleaning routines.

Question 17

Why does my DesignJet print slowly?

Accepted Answer

Slow printing can be caused by: high-quality print mode selected, complex file processing, network bottleneck, insufficient printer memory, or degraded printheads requiring extra passes.

Question 18

What warranty does HP offer on DesignJet printers?

Accepted Answer

Most DesignJet printers come with a standard 1-year warranty. Extended warranty options (HP Care Pack) are available for 2-5 years with various service levels.

Question 19

How do I check ink levels on my DesignJet?

Accepted Answer

Ink levels are displayed on the front panel's home screen. You can also check levels through the Embedded Web Server (EWS) by entering the printer's IP address in a web browser.

Question 20

What is the Embedded Web Server (EWS)?

Accepted Answer

The EWS is a web-based management interface built into DesignJet printers. Access it by typing the printer's IP address into any web browser on the same network.

Frequently Asked Questions