User's Manual Part 2

186
2920B EN 20031206
Image quality problems
In general, when you follow the procedures ‘Maintaining optimal image
quality’ on page 101 and ‘Quality control procedure’ on page 109, you should
rarely encounter quality problems.
However, should any problems occur, the following paragraphs provide some
remedies:
White dots or lines appear in the transport direction
If fine white dots and one or more fine white lines appear in the transport
direction (mostly due to dust infiltration), try the following remedies:
1 Clean the print head resistor line.
Refer to ‘Cleaning the print head resistor line’ on page 164.
2 Print a few test sheets using the ‘Print test image’ function.
Refer to ‘Printing test images’ on page 92.
If the white lines are still visible, contact your local service organization.