Chapter 12

Solution: Adjust the lightness and darkness of the copies.

To adjust the copy contrast from the control panel

1.Make sure you have paper loaded in the input tray.

2.Load your original print side down on the right front corner of the glass or print side up in the document feeder tray.

If you use the document feeder tray, place the pages so that the top edge of the document goes in first.

3.In the Copy area, press Menu repeatedly until Lighter / Darker appears.

4.Do one of the following:

•Press to darken the copy.

•Press to lighten the copy.

5.Press Start Copy Black or Start Copy Color.

Cause: The Paper Type setting is incorrect.

Solution: Change the Paper Type setting to match the type of paper loaded in the input tray.

To set the paper type for copies

1.In the Copy area, press Menu repeatedly until Paper Type appears.

2.Press until the appropriate paper type appears.

3.Press Start Copy Black or Start Copy Color.

To set the paper type for printing

1.Make sure you have paper loaded in the input tray.

2.On the File menu in your software application, click Print.

3.Make sure the HP All-in-One is the selected printer.

4.Click the button that opens the Properties dialog box.

Depending on your software application, this button might be called Properties, Options, Printer Setup, Printer, or Preferences.

5.Click the Paper/Quality tab.

6.In the Type is list, click the type of paper loaded in the input tray.

Cause: Copying a poor-quality picture, such as a newspaper photo, causes bands, checks, or stripes to appear on your copy. These are called moiré patterns.

Solution: To reduce moiré patterns, try placing one or more clear plastic sheet protectors directly on the glass, and then place the original print side down on top of the sheet protectors.

Cause: Debris might be stuck on the glass or on the back of the document lid; this causes poor copy quality and slows down processing.

140 Troubleshooting

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HP J5750, J5788, J5780, J5740 manual Solution Adjust the lightness and darkness of the copies
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J5788, J5740, J5780, J5750 specifications

The HP J5780 is a versatile all-in-one inkjet printer that combines printing, scanning, copying, and faxing capabilities in a single device. Ideal for home and small office environments, this printer is designed to cater to a wide range of document-related needs. Its compact form factor allows it to fit easily into tight spaces without sacrificing functionality.

One of the standout features of the HP J5780 is its print quality. With a maximum resolution of up to 4800 x 1200 optimized dpi, it delivers sharp text and vibrant images, making it suitable for printing everything from documents to photos. The printer uses HP's patented Thermal Inkjet Technology, which ensures precise ink placement and excellent color accuracy.

In terms of print speed, the HP J5780 is efficient, capable of printing up to 30 pages per minute for black and white documents and around 23 pages per minute for color prints. This speed makes it particularly effective in busy office environments where time is of the essence. The device has a 100-sheet paper tray that accommodates various paper sizes and types, including envelopes, glossy photo paper, and legal-sized documents.

The scanner function offers a flatbed design with a 1200 x 2400 dpi optical resolution, enabling users to digitize documents and photos with exceptional clarity. Additionally, the HP J5780 comes with a built-in copier that allows for quick duplication of documents without needing a computer. Users can efficiently make multiple copies, adjust copy sizes, and utilize features like resizing and reduction.

Another important aspect of the HP J5780 is its faxing capability. Featuring a 33.6 Kbps modem, the printer enables quick transmission of documents and comes with a 20-page automatic document feeder (ADF), simplifying the process of sending multi-page faxes.

Connectivity options on the HP J5780 are user-friendly, offering both USB and Ethernet interfaces. This allows for easy connection to computers and networks, enabling users to share the printer within a group. Furthermore, the device is compatible with various operating systems, ensuring seamless integration into different computing environments.

In summary, the HP J5780 is a comprehensive all-in-one solution that emphasizes productivity without compromising quality. Its combination of printing, scanning, copying, and faxing functionalities, along with its user-friendly features, makes it a reliable choice for those seeking efficiency and versatility in their document management tasks. Whether for home use or small office settings, the HP J5780 delivers dependable performance and a range of technologies designed to meet diverse printing needs.
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