Manual HP OfficeJet Pro 7720 (page 141 of 176) (English)

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● Make sure you used the phone cord supplied in the box with the printer to connect to the telephone wall

jack. One end of the phone cord should be connected to the port labeled 1-LINE on the back of the

printer and the other end to your telephone wall jack, as shown in the illustration.

1 Telephone wall jack.

2 Connect the phone cord to the port labelled 1-LINE on the back of the printer.

● Try connecting a working phone and phone cord to the telephone wall jack that you are using for the

printer and check for a dial tone. If you do not hear a dial tone, call your local telephone company for

service.

● Other equipment, which uses the same phone line as the printer, might be in use. For example, you

cannot use the printer for faxing if an extension phone is o the hook, or if you are using a computer

dial-up modem to send an email or access the Internet.

● Check to see if another process has caused an error. Check the display or your computer for an error

message providing information about the problem and how to solve it. If there is an error, the printer

cannot send or receive a fax until the error condition is resolved.

● 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) o and try

faxing again. If the problem persists, contact your telephone company.

● If you are using a digital subscriber line (DSL) service, make sure that you have a DSL lter connected or

you cannot fax successfully.

● Make sure the printer is not connected to a telephone wall jack that is set up for digital phones. 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.

● If you are using either a private branch exchange (PBX) or an integrated services digital network (ISDN)

converter/terminal adapter, make sure the printer is connected to the correct port and the terminal

adapter is set to the correct switch type for your country/region, if possible.

● If the printer shares the same phone line with a DSL service, the DSL modem might not be grounded

correctly. If the DSL modem is not grounded correctly, it can create noise on the phone line. Phone lines

with poor sound quality (noise) can cause faxing problems. You can 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 o your DSL modem and completely remove power for at least 15 minutes. Turn the

DSL modem back on and listen to the dial tone again.

NOTE: You might notice static on the phone line again in the future. If the printer stops sending and

receiving faxes, repeat this process.

128 Chapter 10 Solve a problem ENWW

How do I reset the printer to its original ex factory settings? Can I step the firmware back to the original version when first delivered? Submitted on 27-10-2023 at 08:07
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I have pulled the entire paper tray out to put in the paper. I have put the necessary paper. How do I put the tray back,as the tray will not go back. How do I put the tray back? Submitted on 15-12-2021 at 22:16
Reply Report abuse
I have taken empty printing paper out. I have put it full of paper.How do I put the tray back? Submitted on 15-12-2021 at 22:10
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Others manual(s) of HP OfficeJet Pro 7720

HP OfficeJet Pro 7720 User Manual - German - 192 pages

HP OfficeJet Pro 7720 User Manual - Dutch - 186 pages

HP OfficeJet Pro 7720 Quick start guide - All languages - 46 pages

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HP OfficeJet Pro 7720 Manual

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