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HP Deskjet 6520 - Troubleshooting print quality problems with the diagnostic page
The printer is working, but the printed output is not what you expected. The color may not look right, it might be streaked or faded, the ink may have smeared, the image may look crooked, or there may be other problems.
Print and evaluate a diagnostic page to find out if your printer or print cartridges are causing the problem.
Step 1: Print a diagnostic page
Step 2: Note which cartridges printed which areas of the diagnostic page
Identify which cartridge printed which part of the diagnostic page, so that if you find defects on the page, you know which cartridge is the problem.
However, you can install different combinations of ink cartridges in your printer, and different cartridge combinations print different diagnostic page patterns. The diagnostic page might not look exactly like the example presented here, but the right and left cartridges print in the same areas of the page no matter which cartridges are installed.
Figure 2: Diagnostic page layout (the patterns in each area might look slightly different on your page)
1 - Printed by the right cartridge
2 - Printed by the left cartridge
NOTE: If you are printing in reserve mode (one cartridge is missing), the area of the diagnostic page where that cartridge prints is blank.
Step 3: Check ink levels
NOTE: If you have installed a refilled or remanufactured ink cartridge, or a cartridge that has been used in another product, the ink level indicator is inaccurate or unavailable.
Look in the middle of the diagnostic page. The bars with "E" (for "empty") and "F" (for "full") at each end show the ink levels in the cartridges. As ink is used, the solid color changes to a faded color.
Figure 3: Left (tri-color) cartridge almost full - right cartridge empty
Figure 4: Both left and right cartridges almost full
Step 3: Look for defects
In general, if the printer and print cartridges are working properly, the patterns (which look like grids of lines) should contain few or no missing lines. Also, the colors of the patterns and bars should be approximately the same as the color dots on the print cartridge label.
NOTE: Do not compare the colors on your diagnostic page to the colors on this Web page. Unless your monitor is calibrated, the colors will not be correct. Instead, compare the colors on the page to the colors dots on the print cartridge label. While the color dots may not be perfectly accurate, they are likely to be more accurate than the colors on the monitor.
Missing lines or streaked bars
If a pattern shows more than a few missing lines, or a bar is streaked, that print cartridge is not functioning properly.
Figure 5: The right cartridge (a photo cartridge) shows missing lines and a streaked bar - the cartridge is not functioning properly
Figure 6: The left cartridge (a tri-color cartridge) shows missing lines and a streaked bar - the cartridge is not functioning properly
If your diagnostic page shows missing lines or streaked bars, click here to continue troubleshooting .
If the color of the patterns or bars is very different from the color dots on the cartridge label, the cartridge is not functioning properly.
Figure 7: Color dots on the left (tri-color) cartridge label
Figure 8: The color of one of the left cartridge bars is very different from the color on the cartridge label - the cartridge is not functioning properly
If your diagnostic page shows colors that are very different from the colors on the cartridge label, click here to continue troubleshooting .
If any of the color blocks or patterns is entirely missing, the cartridge is not functioning properly.
Figure 9: The yellow pattern and bar for the left (tri-color) cartridge is missing
If any of the patterns or color blocks is entirely missing, click here to continue troubleshooting .
If the diagnostic page shows smeared ink, you may need to clean your cartridges.
Figure 10: Left (black) cartridge shows smeared ink
If your diagnostic page shows smeared ink, click here to continue troubleshooting .
Step 4: If you saw no defects
If no defects appear on the diagnostic page, the cartridges and product are probably working correctly. Click here to continue troubleshooting (c00211601) (in English).