Table 2-6 Image defect examples (continued)
Problem Image example Solution
Horizontal white lines
1. The photosensitive drum might be scratched, or the developing roller might be
damaged. Replace the toner cartridge.
2. The fuser film might be damaged. Replace the fuser.
Black page
1. The toner-cartridge ground or bias contacts might be dirty. Clean the contacts.
2. The primary charging roller might be defective. Replace the toner cartridge.
3. The high-voltage power supply might be damaged. Replace the high-voltage
power supply.
Tire tracks
A
A
A
A
A
B
B
B
B
B
C
C
C
C
C
a
a
a
a
a
c
c
c
c
c
b
b
b
b
b
This defect typically occurs when the toner cartridge has far exceeded its estimated life.
For example, if you are printing a very large quantity of pages with very little toner
coverage.
1. The toner cartridge might need to be replaced.
2. Reduce the number of pages that you print with very low toner coverage.
White spots on black or in
the image
1. Print a few more pages to see if the problem corrects itself.
2. Make sure that the type and quality of the paper you are using meet
HP specifications. For more information, see the product user guide.
3. Make sure that the environmental specifications for the product are being met.
4. The toner cartridge might need to be replaced.
5. If the transfer roller is deformed or damaged, replace the roller.
6. The transfer roller shaft might be dirty (poor contact). Remove the transfer roller
and clean the shaft.
7. The high-voltage power supply might be damaged. Replace the high-voltage
power supply.
Scattered lines
1. Make sure that the type and quality of the paper you are using meet
HP specifications. For more information, see the product user guide.
2. Make sure that the environmental specifications for the product are being met.
3. Turn over the paper in the tray. Also, try rotating the paper 180°.
4. Change the toner density. Open the Setup menu at the product control panel. and
then open the System Setup menu. Change the Print Density setting.
84 Chapter 2 Solve problems ENWW
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