Hp Designjet 4520 Printer series User Manual Page 107
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7. The front panel display confirms that all printheads are correctly inserted.
8. Now replace the printhead cleaners for any printheads that have been changed. See Remove a
printhead cleaner on page 102 and Insert a printhead cleaner on page 103.
CAUTION: Leaving the old printhead cleaner in the printer will shorten the new printhead's life
and possibly damage the printer.
Manage printhead monitoring
The printer automatically checks the status of the printheads from time to time in order to monitor their
health and detect any problems that might affect print quality. The frequency of these checks is optimized
to maintain good throughput.
If you want to increase the frequency of printhead monitoring in order to detect any problems sooner,
select the
icon, then Printer configuration > Printhead monitoring > Intensive. When the printer
is printing and printhead monitoring is set to Intensive, the front panel and the Embedded Web Server
printer status line will display the following message: Printing. Printhead monitoring (instead of just
Printing).
NOTE: When Intensive is selected, the throughput of the printer will be reduced because of the
increased frequency of printhead checks.
To return to the default printhead monitoring frequency, select the icon, then Printer
configuration > Printhead monitoring > Optimized.
Recover (clean) the printheads
To clean the printheads (which often enables them to recover from problems), go to the printer's front
panel and select the
icon, then Printhead management > Recover printheads. Cleaning takes
about two to four minutes.
Clean a printhead's electrical connections
In some extreme cases it is possible that the printer will not recognize a printhead after it has been
installed. This is due to the build-up of ink deposits on the electrical connections between the printhead
and the printhead carriage. Under these circumstances you are recommended to clean the printhead's
electrical connections. Routine cleaning of the connections when there are no apparent problems is not
recommended.
Included with your printer (in the Maintenance Kit box) is a carriage interconnect wiper.
ENWW Manage printhead monitoring 97
Ink system
- 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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