HP C4342, C4344 Solution 2 Increase the fax resolution, Solution 3 Make sure the glass is clean

Troubleshooting

Chapter 14

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. If the problem persists, turn Error Correction Mode (ECM) off and contact your telephone company.

For more information, see:

“Send a fax in Error Correction Mode” on page 82

Cause: The phone line connection was noisy. Phone lines with poor sound quality (noise) can cause faxing problems.

If this did not solve the issue, try the next solution.

Solution 2: Increase the fax resolution

Solution: For the highest-quality fax, change the fax resolution to Fine, Very Fine (if available), or Photo.

For more information, see:

“Change the fax resolution” on page 23

Cause: The fax resolution setting was set to a low resolution, such as Standard. If this did not solve the issue, try the next solution.

Solution 3: Make sure the glass is clean

Solution: If you are sending a fax from the glass, make a copy to check the quality of the printout. If the quality of the printout is poor, clean the glass.

For more information, see:

•“Make a copy” on page 67

•“Clean the glass” on page 89

Cause: The glass of the product might have been dirty.

If this did not solve the issue, try the next solution.

Solution 4: Check the receiving fax machine for problems

Solution: Try calling the fax number from a telephone and listen for fax tones. If you cannot hear fax tones, the receiving fax might not be turned on or connected, or a voice mail service could be interfering with the recipient's phone line. You can also ask the recipient to check the receiving fax machine for any problems.

Cause: The receiving fax machine was having problems.

178 Troubleshooting