Toner Drop Service Check - Lexmark X500n Service Manual

Toner drop service check

A toner spot stain on paper is caused by ambient toner within printer engine.
Problem area
1 Waste toner feed system
• Waste toner auger
• Waste toner feeder
2 Transfer unit cleaning roller
3 Toner cartridge
Action
Toner drops on the transfer drum due to a breakdown of the
waste toner feed system.
• Waste toner auger mylar is damaged. Examine and replace
if defective. See "Waste toner auger removal" on
page 4-47.
• Waste toner is not properly collected by waste toner feeder.
Check to ensure that waste toner feeder is not compacted.
If so, replace waste toner feeder. See
removal" on page 4-28.
• Check for waste toner in printer. If found, clean and vacuum
printer.
Cleaning roller is faulty.
Remove transfer belt unit (see
on page 4-5). Replace cleaning roller. See
cleaning roller removal" on page
new cleaning roller, thoroughly clean cleaning roller
installation area.
Check for waste toner in printer. If found, clean and vacuum
printer.
Replace faulty toner cartridge.
7100-XXX
"Waste toner feeder
"Transfer belt unit removal"
"Transfer belt
4-4. Prior to installation of
Diagnostic information
2-59