Hp Designjet 4520 Printer series User Manual Page 131
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- Table of contents
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Corrective action
1. Check that you are using appropriate print quality settings. See Choose print quality settings
on page 57.
2. Clean the printheads. See
Recover (clean) the printheads on page 97.
3. Reprint the Image Diagnostics Print. If you still see banding, continue with steps 4 and 5.
4. As there are two printheads for each color, check exactly which printhead is responsible for the
problem, using Part 3 of the Image Diagnostics Print. See
Interpret Image Diagnostics part 3
on page 121Part 3.
5. Replace the printhead that shows the problem. See
Remove a printhead on page 92 and Insert a
printhead on page 94.
Horizontal bands across all the colored strips
If the printer has paper advance problems you will see horizontal bands across all the colored strips.
NOTE: Banding in the green strips is more difficult to see.
Corrective action
1. Check that you are using appropriate print quality settings. See Choose print quality settings
on page 57.
2. If you are using low-quality paper, try better-quality paper. The performance of your printer can be
guaranteed only if you use recommended papers. See
Supported paper types on page 200.
3. Perform paper advance calibration with the same paper type that you intend to use for the final
print. See
How do I... (paper advance calibration topics) on page 125.
4. If there is no improvement in print quality, contact your customer service representative.
Interpret Image Diagnostics part 3
If part 2 has revealed a printhead problem, the purpose of part 3 is to identify which particular printhead
is faulty. Each rectangle in this plot is labelled with the number of the printhead that produced it.
ENWW Interpret Image Diagnostics part 3 121
Diagnostics
- Using your printer 1
- Table of contents 3
- 1 Introduction 11
- Using this guide 12
- Front view 13
- Rear view 14
- The front panel 17
- Printer software 18
- Software setup 19
- Sharing the printer 22
- Printer operation 25
- Switch on and off 26
- Set the date and time 29
- Change the sleep mode setting 29
- Turn off the buzzer 29
- Adjust for altitude 30
- 4 How do I... (paper topics) 31
- Load a single sheet [4020] 38
- Unload a single sheet [4020] 41
- Roll detached from spindle 47
- No paper visible 48
- Download media profiles 50
- Use non-HP paper 51
- Cancel the drying time 51
- Change the drying time 51
- Print job 53
- Save a job 54
- Print a saved job 55
- Cancel a job 55
- Manage the print queue 55
- Deleting a job from the queue 56
- Nest jobs to save roll paper 57
- Which pages can be nested? 58
- Install the stacker 62
- Uninstall the stacker 62
- Change the temperature 62
- Clean the stacker rollers 63
- Move or store the stacker 64
- Image adjustment 65
- Change the page size 66
- Create a custom page size 66
- Change the print quality 67
- Choose print quality settings 67
- Print at maximum speed 69
- Adjust the margins 69
- Print on oversize pages 70
- Print without added margins 70
- Rotate an image 72
- Print a mirror image 73
- Scale an image 73
- Change the palette settings 74
- 8 How do I... (color topics) 77
- Perform color calibration 78
- Set the rendering intent 79
- & RTL driver) 79
- Application settings 80
- Driver settings 82
- Printer settings 83
- Remove an ink cartridge 98
- Ink system 100
- Insert an ink cartridge 101
- Remove a printhead 102
- Insert a printhead 104
- Manage printhead monitoring 107
- Align the printheads 111
- Remove a printhead cleaner 112
- Insert a printhead cleaner 113
- Get ink cartridge statistics 115
- Get printhead statistics 116
- Accounting 117
- Maintenance 121
- Clean the input rollers 122
- Clean the platen 122
- Maintain the ink cartridges 125
- Move or store my printer 125
- Diagnostics 127
- Corrective action 129
- If I still have a problem 132
- Paper advance 135
- After calibration 138
- Paper problems 139
- Check printhead path 142
- Check paper path 143
- Print quality problems 159
- General advice 160
- Graininess 162
- The paper is not flat 162
- Ink marks on the paper 163
- Lines are stepped 164
- Lines are discontinuous 165
- Lines are slightly warped 166
- Color accuracy 166
- PANTONE color accuracy 166
- Improving gray neutrality 169
- Visual gray calibration 170
- Some cautionary notes 170
- Presets under Mac OS 172
- Image errors 173
- The print is completely blank 174
- The image is clipped 174
- Ink system problems 177
- A printhead status message 179
- Stacker problems 181
- Paper scrolling 182
- Other problems 185
- A front panel message 186
- The printer does not print 190
- The printer seems slow 191
- An out-of-memory error 193
- The platen rollers squeak 193
- Embedded Web Server 197
- About printer 199
- Color emulation modes 200
- Connect the printer 201
- Preventive maintenance 203
- About ink system 205
- Ink cartridges 206
- Printheads 207
- Printhead cleaners 208
- Ink system tips 208
- About paper 209
- Using paper 210
- Supported paper types 210
- Drying time 211
- About multiroll 213
- Roll switching policy 215
- Specifications 217
- Functional specifications 218
- Physical specifications 219
- Memory specifications 220
- Power specifications 220
- Ecological specifications 220
- Environmental specifications 220
- Acoustic specifications 221
- Accessories 223
- Ordering ink supplies 224
- Ordering paper 224
- Ordering accessories 227
- Getting help 229
- HP Instant Support 230
- HP Customer Care 230
- HP Designjet Online 231
- Other sources of information 231
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