
Troubleshooting
9.23
9
Vertical repetitive 
defects
If marks repeatedly appear on the printed side of the page at 
even intervals:
• The toner cartridge may be damaged. If a repetitive mark 
occurs on the page at intervals of 75.4 mm, print a 
cleaning sheet several times to clean the cartridge; see 
“Cleaning the Drum” on page 8.10. After the pri ntout, if 
you still have the same problems, remove the to ner 
cartridge and install a new one. See “Replacing the Toner 
Cartridge” on page 8.8.
• Parts of the machine may have toner on  them. If the 
defects occur on the back of the page, the problem will 
likely correct itself after a few more pages.
• If a repetitive mark occurs on the page at intervals of 
77.8 mm, the fuser may be damaged. Contact a service 
representative.
• If a repetitive mark occurs on the pa ge at intervals of 47.1 
mm, the transfer roller may be damaged. Contact a service 
representative.
Background scatter
Background scatter results from bits of toner randomly 
distributed on the printed page. 
• The paper may be too damp. Try printing with a different 
batch of paper. Do not open packages of paper until 
necessary so that the paper does not absorb too much 
moisture.
• If background scatter occurs on an envelope, change the 
printing layout to avoid printing over areas that have 
overlapping seams on the reverse side. Printing on seams 
can cause problems.
• If background scatter covers the entire surface area of a 
printed page, adjust the print resolution through your 
software application or the printer properties.
Misformed 
characters
• If characters are improperly formed and producing hollow 
images, the paper stock may be too slick. Try a different 
paper. See “Paper Specifications” on page E.6.
• If characters are improperly formed and producing a wavy 
effect, the LSV may need service. For service, contact a 
service representative.
Condition Suggested solutions
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