Lexmark E120n User Manual

Changing the long-life photoconductor kit
71
Supplies information
Changing the long-life photoconductor kit
Warning:When replacing the long-life photoconductor kit, do not touch the blue drum. Touching the drum will 
contaminate the long-life photoconductor kit and affect print quality.
1Open the rear cover by sliding the release button to the right.
2Remove the long-life photoconductor kit by pulling out on the extended tabs.
Warning:When rear door is open, be careful not to touch the attached roller....

Changing the long-life photoconductor kit
72
Supplies information
3Unpack the new long-life photoconductor kit, being careful not to touch the blue drum when removing the foam 
covering. Handle the long-life photoconductor kit by the tabs only. 
Warning:Touching the blue drum will cause contamination and affect print quality.
Note:For information about recycling the old long-life photoconductor kit, see Recycling Lexmark 
products on page 74
4Carefully install the long-life photoconductor kit by...

Changing the long-life photoconductor kit
73
Supplies information
5Push the tabs firmly with your thumbs until the long-life photoconductor kit clicks into place.
6Close the rear door.
Warning:Do not leave the rear door open longer than necessary. Extended light exposure can damage the blue 
photoconductor drum and cause print quality problems.
7Open the front cover and hold the Cancelbutton until all lights begin to cycle to reset the long-life 
photoconductor kit counter and warning.
8Close the front...

Lexmark Return Program
74
Supplies information
Lexmark Return Program
The Lexmark Return Program is an environmental program in which Lexmark sells new toner cartridges at a special price 
with the agreement that the cartridge will be returned, at no cost, only to Lexmark for recycling.
Regular toner cartridges without this agreement are also available.
Note:Regular toner cartridges can also be returned, at no cost, to Lexmark using the Lexmark Cartridge 
Collection Program. To learn how to return a...

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Contents
Chapter 1: Overview  ........................................................................................................... 5
Chapter 2: Using the operator panels  ............................................................................... 8
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Chapter 3: Print media tasks and tips ............................................................................. 45
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General problems
76
Troubleshooting
General problems
ProblemSolution / Answer
Lights begin blinking. See Understanding the Lexmark E120 operator panel lights on page 10.
Characters missing when 
printing to envelopesCheck printer driver settings to make sure Envelope has been selected from the Paper Type 
menu. 
If Envelope is selected, try selecting a rougher texture setting. Sometimes toner does not 
adhere well to smooth-textured envelopes. From the printer driver, select Custom 6-
Rough Env from...

General problems
77
Troubleshooting
Toner low light sequence 
comes onTo extend toner cartridge life somewhat, remove the cartridge. Gently shake the toner 
cartridge from side to side and front to back several times to redistribute the toner, and 
reinsert it. Repeat this procedure multiple times. If the print remains faded, replace the toner 
cartridge. See Changing the toner cartridge on page 68 for help.
Paper stacks poorly in 
output bin1Turn the loaded paper stack over.
2Extend paper support on the...

Print quality problems
78
Troubleshooting
Print quality problems
To solve many print quality problems, replace supply or maintenance items that have reached the end of intended life. Use 
the following table for solutions.
SymptomCauseSolution
White linesEither the toner cartridge or the fuser 
is defective.Replace the toner cartridge or the 
fuser*, as needed.
Streaked horizontal linesIf the lines are parallel to lines that are 
supposed to be there, see “Ghost 
Images”
The toner cartridge or the fuser...

Print quality problems
79
Troubleshooting
Light print The Toner Darkness setting is too 
light.
 The paper being used does not 
meet printer specifications.
 The toner cartridge is low.
 The toner cartridge is defective. Select a different Toner Darkness 
setting from the printer driver before 
sending the job to print.
 Load paper from a new package.
 Avoid textured paper with rough 
finishes.
 Make sure paper loaded in the tray 
is not damp.
 Replace the toner cartridge.
Dark print The Toner...

Print quality problems
80
Troubleshooting
Uneven print densityThe toner cartridge is defective. First, remove and reset the toner 
cartridge. If problem persists, replace 
the toner cartridge.
Ghost ImagesThe Form Type setting in the printer 
driver is incorrectly set.Make sure the Form Type setting is 
correct for the paper or specialty 
media used.
Specifically located ghost imagesThe long-life photoconductor kit is 
exhausted.Replace the long-life photoconductor 
kit.
Grouped streaks along the left...