HP Designjet 8000s Printer Series Print Quality Troubleshooting Guide HP DesignJet Information Engineering
1 How to use this guide ..............................................................................................................3 2 Troubleshooting White lines appear on the printout .............................................................................................5 Black lines appear on the printout .............................................................................................8 The printout is smudged .......................................................................
Contents 2 HP DesignJet Information Engineering
1 How to use this guide Find out the similar symptom of the poor print quality in the Table of Contents. NOTE: More than one factor may have caused the problem depending on the symptom. Use a combination of corrective actions if the problem is likely to be caused by multiple factors. If all of the suggested solutions fail, the problem may stem from bad compatibility between the ink and media. In this case, you may use other types of media.
Chapter 1 How to use this guide 4 How to use this guide HP DesignJet Information Engineering
2 Troubleshooting White lines appear on the printout White lines appear on the printout — Pattern 1 Solution: 1. Perform the Media Advance Calibration. See Chapter 7 in the User's Guide. 2. Change the settings of the Media lever. 3. Fine tune the Media advance by performing the Media Advance Calibration again. See Chapter 7 in the User's Guide. As an alternative, try reducing the media advance "on the fly" by pressing the key.
Chapter 2 Figure 2-1 White line pattern 1 Figure 2-2 White line pattern 2 White lines appear on the printout — Pattern 2 Cause: The nozzles are not firing correctly. Troubleshooting Solution: 1. Make sure that the printhead path is clean. 2. Perform daily maintenance, and then a NORMAL printhead recovery. See Chapter 6 in the User's Guide. 3. Perform a STRONG printhead recovery. See Chapter 6 in the User's Guide. 4. Perform a WASH PRINTHEADS operation. See Chapter 14 in the User's Guide.
5. Clean the carriage base and perform a NORMAL printhead recovery operation again. See Chapter 6 in the User's Guide. TIP: Clean the carriage base with a cleaning swab dipped in cap cleaning liquid. The cleaning swabs are included with the attached kit. 6. Repeat steps 3 and 4. 7. For more information on identifying a defective printhead, see “Defective printheads” on page 15. If the printhead is defective, you will need to call HP Support. White lines appear on the printout — Pattern 3 Solution: 1.
Chapter 2 Black lines appear on the printout Black lines appear on the printout — Pattern 1 Cause: The printheads or surrounding printer parts are dirty. Solution: 1. Clean the carriage base and perform a NORMAL printhead recovery. See Chapter 6 in the User's Guide. 2. Change the printhead height. See Chapter 5 in the User's Guide. Black lines appear on the printout — Pattern 2 Troubleshooting Cause: 8 Media is very sensitive to bidirectional printing.
Solution: 1. Use a unidirectional print mode. 2. Print a test image using a print mode with a higher number of passes. Set the print mode using the software RIP. Black lines appear on the printout — Pattern 3 Solution: 1. Perform the Media Advance Calibration. See Chapter 7 in the User's Guide. 2. Change the settings of the Media lever. 3. Fine tune the Media advance by performing the Media Advance Calibration again. See Chapter 7 in the User's Guide.
Chapter 2 The printout is smudged The printout is smudged — Pattern 1 Cause: Scattered ink. Troubleshooting Solution: Do one or more of the following: 1. Perform a bidirectional adjustment on the media being used. See Chapter 7 in the User's Guide. 2. Make sure that the printhead height is appropriate. Change it if it is not. See Chapter 5 in the User's Guide. 3. Perform daily maintenance. See Chapter 6 in the User's Guide. 4. Perform a NORMAL printhead recovery operation.
The printout is smudged — Pattern 2 Cause: Scattered ink. Solution: Do one or more of the following: 1. Make sure that the media is set flat without wrinkles and creases. If the media is not straight, reload the media. 2. Check the printhead height. See Chapter 5 in the User's Guide. 3. Perform daily maintenance, and then perform a NORMAL printhead operation. See Chapter 6 in the User's Guide. 4.
Chapter 2 Solution: Do one or more of the following: 1. Make sure that the media is loaded correctly without creases or wrinkles. 2. Clean the carriage base and perform a NORMAL printhead recovery. See Chapter 6 in the User's Guide. 3. Adjust the heater temperature. 4. Increase the printhead height. See Chapter 5 in the User's Guide. 5. Clean the Media Edge Guards with a clean cloth. 6. Replace the media.
The printout is blurry — Pattern 2 Cause: • Printhead is displaced. • There is a misalignment in bidirectional printing. Troubleshooting Solution: 1. Perform the printhead position adjustment. See Chapter 7 in the User's Guide. 2. Perform a bidirectional adjustment on the media being used. See Chapter 7 in the User's Guide. 3. Perform the Nozzle Position Adjustment. See Chapter 7 in the User's Guide.
Chapter 2 Troubleshooting 14 Troubleshooting HP DesignJet Information Engineering
3 Defective printheads The following are the steps to identify a defective printhead the corresponding procedure to replace it. Table 3-1 To identify a defective printhead 1 Load the media. 2 Set the printer to offline mode by pressing the button. 3 Press the key twice. 4 Select the ADJUST menu using the 5 In the ADJUST menu, scroll to TEST PRINTS and press the OK key. 6 In the TEST PRINTS menu, scroll to the NOZZLE PRINT-RECOVER option and press the OK key.
Chapter 3 To identify a defective printhead (continued) The printhead is defective if the printout contains two or more defective portions as shown above for the same color, and persists for four consecutive times. NOTE: Keep the printouts so that they can be sent to HP for requesting a replacement printhead. NOTE: Solvent ink is used in this printer. Unlike water-based inks, omissions and misalignments may occur when the printhead dries up. To resolve this, clean the printhead.
Index B Index Black lines pattern 1 8 pattern 2 8 pattern 3 9 D Defective printheads identifying 15 replacing 16 P Printout blurred pattern 1 12 pattern 2 13 Printout smudged pattern 1 10 pattern 2 11 pattern 3 11 W White lines pattern 1 5 pattern 2 6 pattern 3 7 17 HP DesignJet Information Engineering
Index 18 HP DesignJet Information Engineering
HP DesignJet Information Engineering
HP DesignJet Information Engineering
© 2007 Hewlett-Packard Development Company L.P. Printed in Germany - Imprimé en Allemagne - Stampato in Germania www.hp.
