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Troubleshooting
99
B
White Spots on black text and
graphics at 94 mm (3.71 in.)
intervals
Black Spots at 94 mm (3.71 in.)
intervals
Make ten copies of a blank, white sheet of paper. (See How to
copy on page 48.) If the problem is not solved, the drum unit may
have glue from a label stuck on the OPC drum surface. Clean the
drum unit. (See Cleaning the drum unit in Appendix A of the
Advanced User's Guide.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 63.)
Black toner marks across the
page
If you use label sheets for laser printers, the glue from the sheets
may sometimes stick to the OPC drum surface. Clean the drum
unit. (See Cleaning the drum unit in Appendix A of the Advanced
User's Guide.)
Make sure that you use paper that meets our specifications. (See
Acceptable paper and other print media on page 17.)
Do not use paper that has clips or staples because they will
scratch the surface of the drum.
If the unpacked drum unit is in direct sunlight or room light, the unit
may be damaged.
The toner cartridge may be damaged. Put in a new toner
cartridge. (See Replacing the toner cartridge on page 57.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 63.)
Examples of poor print quality Recommendation
94 mm
(3.71 in.)
94 mm
(3.71 in.)
94 mm
(3.71 in.)
94 mm
(3.71 in.)
ABCDEFGH
abcdefghijk
ABCD
abcde
01234