3-9FAX-L350 Chapter 3: Maintenance and Service4. TROUBLESHOOTING4.1 Troubleshooting IndexUse the troubleshooting index below to investigate the cause of a problem and refer to the specified page forcountermeasures.Problem• General errors• The unit does not power on. Page 3-18• The display looks abnormal. Page 3-18• The buttons do not work. Page 3-18• No sound from the speaker Page 3-18• Errors shown on the display• User error message. Page 3-10• Error codes. Page 3-12• Printing problems (Evaluation criteria: Test printing is faulty.)• The paper is not fed correctly. Page 3-19The main motor does not run.The paper is not picked up from the auto sheet feeder.The paper skews.• The printing operation is abnormal. Page 3-19The unit indicates a paper jam when there is none.• Poor printing quality Page 3-20LightDarkCompletely blankAll blackDotsMarks on back of papersBlack vertical linesIrregular and smudged black vertical linesIrregular and smudged black horizontal linesMarksBlank spotsWhite vertical linesWhite horizontal linesFaulty registrationDistortion/BD signal failurePartially compressed/stretched imagePoor fixing
