Lexmark T430 Service Manual - Page 87

Variation in image density horizontally across page 4048-1xx FRU Print cartridge Right guide assembly Left guide assembly Transfer assembly roll Action The charge roll may have unbalanced pressure against the PC drum. Check for equal forces at both ends of the charge roll. If one side has a much lower force than the other, check the spring of the guide assembly. Replace the faulty guide assembly (either right or left). If force seems similar, try a new cartridge. Check the springs and bearings at both ends of the transfer roller. The bearing assemblies should support the transfer roller, applying even pressure to the PC drum. Replace the transfer roll assembly if either spring shows signs of damage or fatigue. See "Transfer roll assembly" on page 4-43. Inspect the transfer roller for signs of wear or damage and replace if necessary. Note: Cleaning or vacuuming the transfer roll is not recommended. An uneven distribution of debris on the transfer roll can cause cyclic variation in image density or banding. Poor fusing of image FRU Fuser Action The fuser may not be operating at the proper temperature to fuse the toner to the paper. See "Cold fuser service check" on page 2-41. Make sure recommended paper is being used. Diagnostic information 2-53