Lexmark C520 Service Manual - Page 21
Symptom tables
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5022-xxx Symptom tables Printer symptom table Symptom Dead printer Operator panel-one or more buttons do not work. Operator panel-display is blank. Printer sounds five beeps. Operator panel-display is blank. Operator panel continuously displays all diamonds and does not complete POST. Action Go to "Dead printer service check" on page 2-51. Go to "One or more operator panel buttons fail" on page 2-53. Go to "Operator panel display blank, five beeps, and LED off" on page 2-53. Go to "Operator panel display blank, five beeps, and LED off" on page 2-53. Go to "Operator panel display blank, five beeps, and LED off" on page 2-53. Print quality symptom table Symptom Background Blank page Blurred or fuzzy print Half-color page Horizontal banding Horizontal line Insufficient fusing Missing image at edge Mottle (2-5mm speckles) Narrow vertical line Random marks Residual image Solid color page Vertical banding Action Go to "Print quality-background" on page 2-55. Go to "Print quality-blank page" on page 2-56. Go to "Print quality-blurred or fuzzy print" on page 2-58. Go to "Print quality-half-color page" on page 2-58. Go to "Print quality-horizontal banding" on page 2-58. Go to "Print quality-horizontal line" on page 2-58. Go to "Print quality-insufficient fusing" on page 2-58. Go to "Print quality-missing image at edge" on page 2-58. Go to "Print quality-mottle (2-5mm speckles)" on page 2-58. Go to "Print quality-narrow vertical line" on page 2-58. Go to "Print quality-random marks" on page 2-59. Go to "Print quality-residual image" on page 2-59. Go to "Print quality-solid color page" on page 2-60. Go to "Print quality-vertical banding" on page 2-61. 2-6 Service Manual