Solve fax problems

If you ran a fax test and the test failed, see the test report for possible solutions. For more detailed information, see the onscreen user guide on the Starter CD.

The device is having problems sending and receiving faxes

Make sure you use the phone cord that came with the device.

Other equipment that uses the same phone line as the device might be in use. Make sure extension phones (phones on the same phone line, but not connected to the device) or other equipment is not in use or off the hook. For example, you cannot use the device for faxing if an extension phone is off the hook or if you are using a computer dial-up modem to send e-mail or access the Internet.

If you are using a phone splitter, the splitter could cause faxing problems. Try connecting the device directly to the telephone wall jack.

Make sure that one end of the phone cord is connected to the telephone wall jack, while the other end to port labeled “1-LINE” on the back of the device.

Try connecting a working phone directly to the telephone wall jack and check for a dial tone — if you do not hear a dial tone, please contact your telephone company to check the line.

Make sure you connect the device to an analog phone line, or you cannot send or receive faxes. To check if your phone line is digital, connect a regular analog phone to the line and listen for a dial tone. If you do not hear a normal-sounding dial tone, it might be a phone line set up for digital phones. Connect the device to an analog phone line and try sending or receiving a fax.

The phone line connection might be noisy. Phone lines with poor sound quality (noise) can cause faxing problems. Check the sound quality of the phone line by plugging a phone into the telephone wall jack and listening for static or other noise. If you hear noise, turn Error Correction Mode (ECM) off and try faxing again.

If you are using a digital subscriber line (DSL) service, make sure that you have a DSL filter connected. Without the filter, you cannot fax successfully.

If you are using either a private branch exchange (PBX) or an integrated services digital network (ISDN) converter/terminal adapter, make sure the device is connected to the correct port and the terminal adapter is set to the correct switch type for your country/region.

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HP J5788, J5780, J5740, J5730 manual Solve fax problems
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J5730, J5788, J5740, J5780 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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