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HP Scitex LX850 and LX820 Printer Series - How to work with ink system components

Remove an ink cartridge

An ink cartridge should be removed and replaced when it is empty or past its expiry date. An empty cartridge is indicated in the HP Internal Print Server and by an orange blinking light beside the cartridge itself. You may also decide to remove a cartridge if it contains little ink and you want to provide for a long period of unattended printing.
The printer can continue printing without any ink cartridges for at least 20 minutes, depending on the print mode and the job being printed. Therefore, cartridges can be replaced while printing continues. A functional ink cartridge is required in order to start a new job.
  1. Go to the cartridge that you intend to remove. The black, yellow and cyan cartridges sit at the front of the printer; the magenta, light magenta and light cyan cartridges are at the rear.
  2. Disconnect the cartridge connector by pressing the tabs on each side of it and pulling it gently away from the cartridge.
  3. Remove the empty cartridge from the printer.
  4. If the cartridge does not seem to be empty, please refer to the Maintenance and troubleshooting guide. Some stranded ink can be expected, ranging from 2% to 5% of the original content.

Insert an ink cartridge

  1. Check that the new cartridge is of the correct color.
  2. Place the cartridge on a flat surface and turn it four times (rotating it through 360 degrees) as indicated on the label, to ensure that the ink is well mixed before use.
  3. Tear off the colored label, then remove the packaging and the red protective cap.
  4. Put the new cartridge into its correct place on the printer. The black, yellow and cyan cartridges sit at the front of the printer; the magenta, light magenta and light cyan cartridges are at the rear.
  5. Check that the rubber part around the needle in the cartridge connector is clean. Clean gently if necessary.
  6. Connect the cartridge connector to the cartridge.
    The cartridge connectors will refuse connection to the wrong type or color of cartridge. If you cannot connect the connector easily to the cartridge, please check that you have the correct cartridge.
  7. Ensure that the side buttons on the cartridge connector are in the 'out' position, showing successful connection.
  8. A few seconds after you have connected the cartridge, the green LED should be lit. If it is not lit after 10 seconds, please reconnect the cartridge. The LED will turn red if the supply is expired or not valid; please refer to the HP Internal Print Server or to the front panel for further details and corrective action.

Remove a printhead

If a printhead develops an electrical fault or overheats, the HP Internal Print Server will indicate that it should be reseated or replaced. In addition, you may wish to replace a printhead if its warranty has expired or if you feel that its performance is not adequate.
  1. Ensure that the printer is not trying to print: stop the job queue.
  2. At the front panel, select the Ink System icon and then Replace printheads.
  3. Open the printhead access door in the side of the printer.
  4. Lift the carriage cover.
  5. Lift the cover of the printhead that you intend to remove. It should be indicated by a flashing red light.
  6. Lift the handle provided with the printhead, and pull the handle gently upwards to disconnect the printhead from the carriage, as shown in the illustration below.
    The yellow/magenta printhead is more difficult to remove, because it is located partly underneath the carriage structure. Remove it carefully.
  7. Remove the printhead from the printer. The original packaging materials can be used to discard the old printhead or in case there is a need to return it to HP.

Insert a printhead

  1. Check that the new printhead is of the correct colors.
    Each printhead has a unique shape and cannot be inserted into the wrong slot.
  2. Shake the printhead according to the instructions on the packaging.
  3. Remove its packaging and protective caps.
    You may wish to keep the protective caps for later reuse, in case you ever want to remove a printhead from the printer.
  4. Put the new printhead into its correct place in the printer, and lower its handle.
    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 rotate it as you insert it.
  5. Close the cover of the new printhead.
  6. Close the carriage cover.
  7. Close the printhead access door. The printer checks that the new printhead has been correctly inserted, and recommends printhead alignment (this is optional).
  8. Restart the job queue.

Check the status of the ink system

The status lights in front of each ink cartridge (on the left side) give a quick indication of its status.
  • Green steady light: no problems
  • Green slowly blinking light: cartridge in use, do not touch
  • Orange blinking light: cartridge is empty
  • Red steady light: there is a problem, check the HP Internal Print Server for more information
  • All lights off: no cartridge, cartridge not connected, or unknown problem
The level of ink remaining in each color is displayed at the bottom right of the HP Internal Print Server's main screen. You can see more details of ink cartridge and printhead status by selecting Information > Supplies.
The level of ink remaining in each color can be displayed on the front panel by selecting the Ink System icon . This screen is usually displayed by default.
The ink level estimates are not guaranteed to be accurate.