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...

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...

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...

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...

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...

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...