HP 3000CP - Manual (Page 238)

Troubleshooting
Solving Image-Quality Problems
11-14
Banding is the most common problem that can affect your image quality but
another problem that may affect them is color misalignment.
Problem See: Corrective Action
1 Banding in all color columns. Example B Refer to 11-20, Color Alignment
Quality Test
The causes are not related to
misalignment but the troubleshooting
actions are the same.
NOTE:It is also possible that the banding was caused because you were using non-
HP media. The performance of your printer can only be guaranteed if you use
genuine HP media.
Example B