Brother International HL-1440 Users Manual - English - Page 100

Turn the drum unit gear by hand while looking at the surface of, exact position of the image defect.

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CHAPTER 6 TROUBLESHOOTING Image Defect Samples Recommendation If the problem is not solved after printing a few pages, the drum unit may have glue from label stock on the OPC drum surface. 94 mm 3.7 in. 94 mm 3.7 in. Clean the drum unit as follows: 1. Position the print sample in front of the drum unit, and find the exact position of the image defect. White Spots Printed pages have white spots in black text and graphics at intervals of 94 mm (3.7 in.). 94 mm 3.7 in. 94 mm 3.7 in. 2. Turn the drum unit gear by hand while looking at the surface of the OPC drum. Black Spots Printed pages have black spots at intervals of 94 mm (3.7 in.). 3. When you have located the mark on the drum that matches the print sample, wipe the surface of the OPC drum with a cotton swab until the dust or paper powder on the surface comes off. 6-14

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CHAPTER 6 TROUBLESHOOTING
6-14
Image Defect Samples
Recommendation
94 mm
3.7 in.
94 mm
3.7 in.
White Spots
Printed pages have white
spots in black text and
graphics at intervals of 94 mm
(3.7 in.).
94 mm
3.7 in.
94 mm
3.7 in.
Black Spots
Printed pages have black
spots at intervals of 94 mm
(3.7 in.).
If the problem is not solved after printing a few pages, the drum unit
may have glue from label stock on the OPC drum surface.
Clean the drum unit as follows:
1.
Position the print sample in front of the drum unit, and find the
exact position of the image defect.
2.
Turn the drum unit gear by hand while looking at the surface of
the OPC drum.
3.
When you have located the mark on the drum that matches the
print sample, wipe the surface of the OPC drum with a cotton
swab until the dust or paper powder on the surface comes off.