Lexmark X500n Service Manual - Page 102
White line I service check, White line II service check
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7100-XXX White line I service check Vertical white line appears in a specific color area when print quality test print is run. Problem area 1 Test print 2 Toner cartridge Action Print the maintenance page. See "Printing the maintenance and configuration pages" on page 3-3. White line appears on specific color. • Developer roller of specific toner cartridge is dirty. Remove foreign particle adhering to specific toner cartridge developer roller. • Developer roller surface is damaged. Replace problem toner cartridge. White line II service check Vertical white line appears from leading edge to trailing edge of printed image. Problem area 1 Laser unit assembly (printhead) 2 Toner cartridge Action Dust-proof glass of laser unit is smeared with toner or foreign particles. Clean glass: • Remove toner cartridges and photodeveloper cartridge. See "Photodeveloper cartridge removal" on page 4-8. • Open dust-proof glass cover. • Clean glass. There are foreign particles adhering to laser beam opening of printhead. Clean laser beam opening. Foreign particles mixed in toner cartridge. Replace faulty cartridge. 2-64 Service Manual