Technical data

7.2 Background Staining

Description: A degree of darkness or contamination overall or localized in the

white areas of the print. Figure 7–2 is an example of background staining.

Troubleshooting: Test the degree of staining by printing one or more copies

of the 1948 Setup pattern, as shown in Section 3.3. Turn the green density

adjusting knob fully clockwise and then counterclockwise printing several test

patterns at each extreme. Inspect the gray or background areas of both prints.

No staining should occur. A slight density change will be noticeable.

• If you see no change in density, go to Section 7.15, HVPSA FIP.

• If the background stains run in bands across the print and are

approximately 4.92 in. (125mm) apart, the photosensitive print drum

might be damaged. If background staining is evident perform the following

procedure:

1. Swap the print cartridge.

2. Swap the developer cartridge.

3. Clean and swap the transfer/separation charger.

4. Perform all the steps in Section 7.17, Developer Bias FIP.

Image Defects FIPs 7–3