HP Designjet 4520ps 42 in User Manual

							Insert an ink cartridge
1.Pick up the new ink cartridge and find the label identifying the ink color. Hold the ink cartridge so
that you can see the identifying colored label at the top of the side facing you.
2.Check that the colored label above the empty slot in the printer matches the color of the label on
the cartridge.
3.Insert the ink cartridge into the cartridge drawer.
Position the cartridge at the rear of the drawer as indicated below.
NOTE:A larger black ink cartridge is available that uses the whole length of the drawer.
4.Slide the drawer and cartridge into the slot until it locks into position.
If you have difficulty, see I cannot insert an ink cartridge on page 168.
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							5.When all cartridges have been inserted, close the door (push it until it clicks shut).
6.The front panel display confirms that all cartridges have been correctly inserted.
Remove a printhead
WARNING!Make sure the printer wheels are locked (the brake lever is pressed down) to prevent the
printer from moving.
Printhead replacement must be performed with the printer switched on at the power isolation switch.
1.At the printers front panel, select the 
 icon, then Printhead management > Replace
printheads.
2.The printer moves the carriage into the correct position.
CAUTION:If the carriage is left in the central part of the printer for more than seven minutes. it
will try to move back to its normal position in the right-hand end.
3.When the carriage has stopped moving, the front panel will ask you to open the window.
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							4.Locate the carriage.
5.Pull up and release the latch on top of the carriage.
6.Lift up the cover. This will now give you access to the printheads.
7.To remove a printhead, lift up the blue handle.
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							8.Using the blue handle, gently disengage the printhead.
9.Gently pull the blue handle upward until the printhead is released from the carriage.
CAUTION:Do not pull abruptly because this can damage the printhead.
10.The front panel display identifies the missing printhead.
Insert a printhead
1.If the printhead is new:
a.Remove the blue protective cap by pulling down on it.
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							b.Remove the clear protective tape from the printheads nozzles by pulling on the paper tab.
The printhead is designed to prevent you from accidentally inserting it into the wrong position.
Check that the colored label on the printhead matches the colored label of the carriage position
into which the printhead is to be inserted.
2.Insert the new printhead into its correct position in the carriage.
CAUTION:Insert the printhead slowly and vertically, straight down. It may be damaged if you
insert it too fast, or at an angle, or if you turn it as you insert it.
3.Push down as indicated by the arrow shown below.
When installing the new printhead there may be some resistance, so you need to press it down
firmly but smoothly.
If you have difficulty, see 
I cannot insert a printhead on page 168.
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							4.Insert any other printheads that need to be installed, and close the carriage cover.
When all the printheads have been inserted correctly and accepted by the printer, the printer will
beep.
NOTE:If the printer does not beep when you insert the printhead and the Replace message
appears on the front panel, the printhead may need to be reseated.
5.Latch the carriage cover.
When the carriage has been correctly latched, it looks like this:
6.Close the window.
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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 printheads 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 printers front
panel and select the 
 icon, then Printhead management > Recover printheads. Cleaning takes
about two to four minutes.
Clean a printheads 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 printheads
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.
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							This should be used for cleaning the electrical interconnects of both the printhead carriage and the
printhead, which should be done if the front panel persistently displays the Reseat or Replace message
next to the printhead.
1.Remove a new pre-moistened replacement sponge from its pouch.
A supply of sponges is included in the box with the wiper. If all sponges have been used, more can
be obtained by contacting your customer service representative.
2.Open the carriage interconnect wiper.
3.Load the sponge into the carriage interconnect wiper by positioning the sponge on the face of the
carriage interconnect wiper with the shorter tab in the locating slot.
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							4.Close the carriage interconnect wiper, trapping the sponge in place.
5.Open the printhead carriage latch and extract the printhead that has the problem, as indicated on
the front panel. See 
Remove a printhead on page 92.
6.Insert the carriage interconnect wiper into the printhead slot at the back. Wipe the electrical contacts
by inserting the tool between the electrical connections at the back of the slot and the steel spring
with the sponge facing away from you and towards the electrical contacts. Try to avoid picking up
any ink deposit which may have accumulated on the bottom surface of the slot.
CAUTION:If the carriage is left in the central part of the printer for more than seven minutes. it
will try to move back to its normal position in the right-hand end.
7.Rub the sponge against the contacts with a light force along the entire depth of the flex connector
as allowed by the mechanical stop on the tool.
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							8.Take special care to clean all contacts thoroughly, including the ones at the lowest point of the
connector.
9.Using the same sponge, clean the lower strip of electrical contacts on the printhead (unless the
printhead is new), avoid touching the upper set of electrical contacts.
CAUTION:Do not touch the surface of the printhead containing the nozzles, which are easily
damaged.
10.After waiting a few moments to allow both connectors to dry, replace the printhead into the printhead
carriage. See 
Insert a printhead on page 94.
11.On completion of the cleaning process, open the carriage interconnect wiper by pulling on the
sponge tab.
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