HP J5788, J5780, J5750, J5740 manual Print quality of the fax I received is poor

Chapter 12

Solution: Load only one type of paper at a time. When you are printing faxes, make sure letter, A4, or legal paper is loaded in the input tray.

The print quality of the fax I received is poor

Cause: The phone line connection is noisy.

Solution: If the failure was due to noise on the phone line, contact the sender to have them resend the fax. The quality might be better when you try again. 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 the problem persists, turn Error Correction Mode (ECM) off and contact your telephone company.

To change the ECM setting from the control panel

1.Press Setup.

2.Press 5, and then press 6.

This selects Advanced Fax Setup and then selects Error Correction Mode.

3.Press to select On or Off.

4.Press OK.

Cause: The sending fax machine is having problems.

Solution: Ask the sender to check the sending fax machine for any problems. Also check to see if faxes from other senders have the same quality problems.

Cause: The glass or automatic document feeder of the sending fax machine is dirty.

Solution: If you have vertical lines or streaks on the fax, the sender's fax machine might have dirt or dust on the glass or automatic document feeder. Check with the sender to see if the glass or automatic document feeder is clean.

Cause: The print cartridges need to be cleaned or might be out of ink.

Solution: Check the estimated ink levels remaining in the print cartridges. If the print cartridges are low or out of ink, you might need to replace the print cartridges.

If there is ink remaining in the print cartridges, but you are still noticing a problem, print a self-test report to determine if there is a problem with the print cartridges. If the self-test report shows a problem, clean the print cartridges. If the problem persists, you might need to replace the print cartridges.

For more information on print cartridges, see Print cartridge troubleshooting.

Some of the pages of a fax I received are faded or blank

Cause: The print cartridges need to be cleaned or might be out of ink.

Solution: Check the estimated ink levels remaining in the print cartridges. If the print cartridges are low or out of ink, you might need to replace the print cartridges.

If there is ink remaining in the print cartridges, but you are still noticing a problem, print a self-test report to determine if there is a problem with the print cartridges. If the

146 Troubleshooting