Telephone Problems; Print Quality Problems; General Problems - Canon FAX-B840 User Manual

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Telephone problems

You cannot dial.
The telephone line may not be connected properly.
• Make sure all line connections are secure (see p. 7).
The power cord may not be plugged in securely.
• Check that the power cord is plugged securely into the fax and into the wall outlet (see p. 8).
If the fax is plugged into a power strip, make sure the power strip is plugged in and turned on.
The fax may not be set for the type of telephone line in use (pulse/tone).
• Make sure the fax is set for the correct telephone line type (see p. 12).
The handset, telephone, or extension phone disconnects while you are talking.
The power cord may not be plugged in securely.
• Check that the power cord is plugged securely into the fax and into the wall outlet (see p. 8).
If the fax is plugged into a power strip, make sure the power strip is plugged in and turned on.
There is interference on the line.
A mobile phone or cordless phone may be in use near the fax.
• Make sure that mobile phones and cordless phones are not used near the fax.

Print quality problems

The print quality is not what you expect; print is not clear, is splashed, has missing
dots or white streaks.
The paper you are using may not be supported by the fax.
• Make sure you are using the recommended paper (see p. 24).
You may be printing on the wrong side of the paper.
• Some papers have a "right" side for printing. If the print quality is not as clear as you would like it to be, try turning the paper over
and printing on the other side.
The nozzles on the BJ cartridge print head may be clogged.
• Clean the BJ cartridge print head if necessary (see p. 57).
The BJ cartridge may not be installed properly.
• Make sure the BJ cartridge is installed properly (see p. 11).
The BJ cartridge print head may be damaged.
• Determine if the problem is with the BJ cartridge print head (see p. 57) and replace the BJ cartridge if necessary (see p. 58).
The printout contains blurred or smudged ink.
The paper you are using may not be supported by the fax.
• Make sure you are using the recommended paper (see p. 24).
You may be printing on the wrong side of the paper.
• Some papers have a "right" side for printing. If the print quality is not as clear as you would like it to be, try turning the paper over
and printing on the other side.

General problems

The fax has no power.
The power cord may not be plugged in securely.
• Check that the power cord is plugged securely into the fax and into the wall outlet (see p. 8).
If the fax is plugged into a power strip, make sure the power strip is plugged in and turned on.
The power cord may not be supplying power.
• Check the power cord by substituting with another, or by using a voltmeter to test it for continuity.
The fax will not print reports.
The BJ cartridge may need to be replaced.
• Determine if the problem is with the BJ cartridge and replace if necessary (see p. 58).
Nothing appears on the LCD.
The power cord may not be plugged in securely.
• Check that the power cord is plugged securely into the fax and into the wall outlet (see p. 8).
If the fax is plugged into a power strip, make sure the power strip is plugged in and turned on. If the LCD remains blank, unplug
the fax, wait five seconds, then plug it in again.
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