Troubleshooting; Troubleshooting Index - Canon FAXPHONE L75 Service Manual

3. TROUBLESHOOTING

3.1 Troubleshooting Index

Use the troubleshooting index below to investigate the cause of a problem and refer to the specified page for
countermeasures.
Problem
• Errors shown on the display (Evaluation criteria: Look at the unit in quastion.)
• The error message can be checked.
• The error code can be checked.
• General errors
• The unit does not power on.
• The display looks abnormal.
• The keys do not work.
• No sound from the speaker
• Printing problems (Evaluation criteria: Test printing is faulty.)
• The paper is not fed correctly.
The main motor does not run.
The paper is not picked up from the auto sheet feeder.
The paper skews.
• The printing operation is abnormal.
The unit indicates a paper jam when there is none.
• Poor printing quality
Light
Dark
Completely blank
All black
Dots
Marks on back of papers
Black vertical lines
Irregular and smudged black vertical lines
Irregular and smudged black horizontal lines
Marks
Blank spots
White vertical lines
White horizontal lines
Faulty registration
Distortion/BD signal failure
Partially compressed/stretched image
Poor fixing
LASER CLASS 1060P Chapter 4: Maintenance & Service
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