IBM 4247-003 Maintenance Manual - Page 147

Print Quality Failures (Darkness, Location, Quality) Character or line spacing uneven or overprinting. Multiple-part form copies too light or missing dots. Smearing or smudging at perforations on multiple-part forms or heavy stock. Smearing or smudging. Missing dots or characters. Incorrect print, garbled print, or wrong characters print. Horizontal misalignment (dots or characters move left or right). Vertical misalignment (dots or characters move up or down). Action 1. See "Main Paper Drive Check and Adjustment" on page 301 and check the separate path in use. See "Individual Forms Paths Checks" on page 310. 2. See "Printhead Drive Service Check" on page 333. 1. See "Standard AFTA Service Check and Adjustment" on page 285. 2. See "Print Quality Checks" on page 338. 1. Use Perforation Safety feature. Refer to a 4247 User's Guide. 2. See "MAP 0160: Ribbon Feed and Ribbon Lift" on page 89. 3. See "Main Paper Drive Check and Adjustment" on page 301. 4. See "Printhead Drive Service Check" on page 333. 5. Check for excessive ribbon inking. 1. See "MAP 0160: Ribbon Feed and Ribbon Lift" on page 89. 2. See "Main Paper Drive Check and Adjustment" on page 301. 3. See "Printhead Drive Service Check" on page 333. 4. Check for excessive ribbon inking. 1. See "Standard AFTA Service Check and Adjustment" on page 285. 2. See "Print Quality Checks" on page 338. For Model A00, see "MAP 0120: Parallel or Serial Attachment, Model A00 and Model 003" on page 33. For Models 001, 002, or 003, see "MAP 0121: Parallel with Twinax or Coax Attachments, Models 001, 002, or 003" on page 41. For a 4247, with NPS, see "MAP 0122: Network Print Server Attachment" on page 59. See "Print Quality Checks" on page 338. See "Print Quality Checks" on page 338. Chapter 1. Diagnosing Problems 147