Lexmark C772N Service Manual - Page 139

5061 All colors have light print over the entire page Step 1 2 3 Actions and questions Replace the second transfer roll. See "Second transfer roll removal" on page 4-88. Does the light print persist? Turn the printer off. Check the cable connections between the transfer HVPS board and the system board. Check continuity on the cable between the rear second transfer roll arm and the 1 lead on the transfer HVPS board. Yes Go to step 2 Go to step 3 Replace the transfer HVPS board. See "Transfer HVPS board removal" on page 4-91. No Problem resolved Problem resolved Check the connection at the second transfer roll arm. One color has light print over the entire page Step Actions and questions 1 Print cartridge-Make sure the cartridge is seated properly and all packaging material is removed from the cartridge. Has all packaging material been removed and the cartridge seated correctly? 2 Print cartridge-The cartridge may be out of toner. Change or switch the cartridge. Does the issue persist? 3 Cartridge contact assembly-Check the cartridge contact block. Make sure the PC drum contact pin is not stuck. See "Cartridge contact assembly pin locations (cyan, magenta and yellow)" on page 5-4 to identify the PC drum contact pin. Does the PC drum contact pin move freely? Yes Go to step 2 Go to step 3 Replace the FRUs in the order shown: • Cartridge contact assembly. See "Cartridge contact assembly removal" on page 4-35. • Developer HPVS board. See "Developer HVPS board removal" on page 4-39. No Remove the packaging material, and seat the cartridge. Problem resolved Replace the cartridge contact assembly. See "Cartridge contact assembly removal" on page 4-35. Diagnostic information 2-97