HP DesignJet 70 User Manual

							HP Designjet 70/110plus Printer series—Quick Reference Guide
20 If the paper is misaligned, the printer will eject the paper and the display will 
show the Misaligned and Roll icons; you will have to reload the paper.
Repeat Step 6, so that the paper is tightly rolled onto the spindle.
How do I load a roll of paper? (110plus Printer series) (continued)
 
						

							HP Designjet 70/110plus Printer series—Quick Reference Guide
21 Important:Do not pull on the roll of paper once it is taken up by the printer, 
that is, if there is any resistance.
There are two ways of unloading a roll of paper:
• If you want to unload the roll in order to feed a single sheet through the printer, 
press the Cancel and OK keys on the front panel at the same time (see below). 
If you later request printing to the roll, the Automatic Roll Feed will then 
automatically reload the roll.
• If you want to unload the roll in order to completely remove it (for example, you 
no longer wish to use this roll of paper):
1. Push the Eject button on the left roll feed support at the rear of the printer. Avoid 
pressing the Eject button several times, as this can damage the paper.
2. Pull the roll towards you and remove the paper completely from the rear paper 
path of the printer. The icons shown below flash until the paper is completely 
out, because if the paper is only partially removed, paper jams may 
subsequently occur. Sometimes the paper may fall away from the rear path by 
itself.
You do not need to remove the spindle from its supports in the printer.
How do I unload a roll of paper? (110plus Printer series)
 
						

							HP Designjet 70/110plus Printer series—Quick Reference Guide
22
How do I replace ink cartridges?
1. Open the front hinged flap at the 
right of the printer.
2. For each ink cartridge that needs to 
be replaced:
• Gripping it by its shorter top 
edges, lift the ink cartridge 
vertically up and out of the 
printer.
• Lower the new ink cartridge into 
its slot until it clicks into place 
and is quite secure.
3. Close the outer flap.
 
						

							HP Designjet 70/110plus Printer series—Quick Reference Guide
23 If a printhead fails or needs attention, the corresponding icon on the front panel 
flashes.
Note that the illustration below shows the HP Designjet 70 Printer series.
Make sure the printhead is correctly seated. If this is not the problem, the most likely 
cause of failure is that the printhead contacts need to be cleaned. You will need 
the following cleaning materials:
• Clean, soft, lint-free material that will not come apart or leave fibres when 
damp (a coffee filter, for example)
• Distilled or filtered water
•Paper towels
Make sure the printer is powered on, then do the following:
1. Open the front hinged flap at the right of the printer.
2. Open the second (back) part of the flap and lift it back fully. The print carriage 
will move to the left and then back to the right. Wa i t  for  it  t o st o p. When the 
carriage has stopped moving, unplug the power cable from the power supply.
How do I clean a printhead?
 
						

							HP Designjet 70/110plus Printer series—Quick Reference Guide
24 3. Pull the printhead cover up and towards you, so that the hook at the front 
unlatches itself, and then push the whole cover back so that the printheads are 
exposed.
4. Remove the failed printhead by lifting the small handle on the top and using it 
to pull the printhead vertically up and out of the printer.
5. Ensure that no tape is covering the printhead contacts. If the tape is present, 
remove it.
6. Gently wipe the printhead contacts with a clean, soft, lint-free cloth.
How do I clean a printhead? (continued)
 
						

							HP Designjet 70/110plus Printer series—Quick Reference Guide
25 7. If the printhead contacts are still dirty….
...slightly moisten the cloth with distilled water and continue softly wiping the 
contacts until they are clean.
8. Place the printhead on a paper towel and leave it to dry for at least five 
minutes.
9. While the printhead is drying, clean the contacts inside the carriage in the 
same way.
How do I clean a printhead? (continued)
 
						

							HP Designjet 70/110plus Printer series—Quick Reference Guide
26 10.When both the printhead and the contacts inside the carriage are dry, re-insert 
the printhead by lowering it into place and return the small handle to its 
lowered position. Press down firmly and evenly on both the front and the back 
of the printhead to make sure it is correctly seated.
11.Pull the printhead cover towards you, ensuring that the hook at its front edge 
latches onto the tab, and then push it away from you to close the cover.
12.Plug in the printer power cable.
13.Close the rear part and then the front part of the outer flap. 
14.We strongly recommend that you perform an alignment check, to ensure the 
best quality printing. See  “How do I align printheads?” on page 31.
There must be paper in the tray during alignment (you can use your least 
expensive paper). Pre-alignment calibrations may take some time, especially if 
multiple printheads have been removed and re-inserted. Check that the 
alignment print has a tick on it. The tick should be cyan.
15.Check that the printhead icon on the front panel is no longer flashing. If this is 
the case, the printhead has been re-inserted successfully.
How do I clean a printhead? (continued)
 
						

							HP Designjet 70/110plus Printer series—Quick Reference Guide
27 If one of the printhead icons on the front panel (see page 39) is flashing, the 
corresponding printhead has failed or needs attention. Check that the printhead is 
properly seated, and clean the printhead contacts (see page 24). If the problem 
persists, replace the printhead. 
1. Open the front hinged flap at the right of the printer.
2. Open the second (back) part of the flap and lift it back fully. The print carriage 
will move to the left and then back to the right. Wa i t  for  it  t o st o p.
3. Pull the printhead cover up and towards you, so that the hook at the front 
unlatches itself, and then push the whole cover back, so that the printheads are 
exposed.
4. For each printhead that needs to be replaced:
How do I replace printheads?
 
						

							HP Designjet 70/110plus Printer series—Quick Reference Guide
28 • Lift the small handle on the top and use it to pull the printhead vertically up and 
out of the printer.
• Take the new printhead and remove the tape that protects its electrical contacts 
and ink nozzles.
• Lower the new printhead into place and return the small handle to its lowered 
position.
How do I replace printheads? (continued)
 
						

							HP Designjet 70/110plus Printer series—Quick Reference Guide
29 • Push the printhead gently into place, so that it is secure.
Repeat this for each printhead that is to be replaced.
5. When you have replaced the printheads as required, pull the printhead cover 
towards you, ensuring that the hook at its front edge latches onto the tab, and 
then push it away from you to close the cover.
6. Finally close the rear part and then the front part of the outer flap. Note that 
after closing the flap, the printer will automatically perform some internal 
calibrations on the printhead, and then on the alignment. There must be paper 
in the tray during alignment (you can use your least expensive paper). Pre-
alignment calibrations may take some time, especially if multiple printheads 
are replaced. 
How do I replace printheads? (continued)