Difficulty

Easy

Steps

11

Time Required

                          15 minutes

Sections

2

  • HP Deskjet 6840 General Device Disassembly
  • 7 steps
  • HP Deskjet 6840 Maintenance
  • 4 steps

Flags

5

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Introduction

What you need

Step 1

              HP Deskjet 6840 General Device Disassembly
  • Turn the printer around so the back of it is facing you.

Turn the printer around so the back of it is facing you.

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Step 2

  • Use two fingers to simultaneously press the two grooves on the back of the printer down and in.
  • This will release the panel from the printer.
  • Pull the panel off of the printer using your hands.

Use two fingers to simultaneously press the two grooves on the back of the printer down and in.

This will release the panel from the printer.

Pull the panel off of the printer using your hands.

Step 3

  • Use a screwdriver to remove each screw.
  • Use both hands to pull out and remove the rear support structure.

Use a screwdriver to remove each screw.

Use both hands to pull out and remove the rear support structure.

Step 4

  • Carefully remove the shell that encases the internal parts of your printer.
  • Use both hands to gently remove the shell from the base of the printer. Place your hands at the corners and firmly lift the shell until it pops off of the base. Do not pry or bend the shell.
  • As you pull the shell from the printer base, you will see two wires that connect the shell to the printer’s internal parts. Carefully detach these wires from the shell.

Carefully remove the shell that encases the internal parts of your printer.

Use both hands to gently remove the shell from the base of the printer. Place your hands at the corners and firmly lift the shell until it pops off of the base. Do not pry or bend the shell.

As you pull the shell from the printer base, you will see two wires that connect the shell to the printer’s internal parts. Carefully detach these wires from the shell.

Step 5

  • Use a screwdriver to remove the screws from the printer carriage assembly (the piece of machinery that moves the ink back and forth).
  • Remove the screws from the green, plastic motherboard. Gently loosen the motherboard from its base, but don’t completely pull it out - there are wires attached to it.

Use a screwdriver to remove the screws from the printer carriage assembly (the piece of machinery that moves the ink back and forth).

Remove the screws from the green, plastic motherboard. Gently loosen the motherboard from its base, but don’t completely pull it out - there are wires attached to it.

Step 6

  • Use a screwdriver to remove the screws from the motor carriage. The motor carriage holds the motor and allows your printer to print.
  • Should you need to replace the motor, use a screwdriver to remove the screws from the motor housing.
  • Use your fingers to remove the motor from the housing. Next, replace the motor with a new one.

Use a screwdriver to remove the screws from the motor carriage. The motor carriage holds the motor and allows your printer to print.

Should you need to replace the motor, use a screwdriver to remove the screws from the motor housing.

Use your fingers to remove the motor from the housing. Next, replace the motor with a new one.

Step 7

  • Now that you’ve completed steps 1 through 6, your printer should look like the one in the photograph.
  • To complete the disassembly, use a screwdriver to remove any remaining screws.

Now that you’ve completed steps 1 through 6, your printer should look like the one in the photograph.

To complete the disassembly, use a screwdriver to remove any remaining screws.

Step 8

              HP Deskjet 6840 Maintenance
  • To clean the exterior of the device, generally a soft, moist cloth can be used to wipe away any dust, smudges, or other granules that may have collected on the device. Be careful not to dampen the cloth too much, as excessive water (or other liquids) slipping into the interior could damage the device.

To clean the exterior of the device, generally a soft, moist cloth can be used to wipe away any dust, smudges, or other granules that may have collected on the device. Be careful not to dampen the cloth too much, as excessive water (or other liquids) slipping into the interior could damage the device.

Step 9

  • One you are able to access the interior (with the help of the General Disassembly Guide, there may be an amount of ink residue that builds up inside the device, so be thorough when sterilizing your printer.
  • However, regarding general maintenance, the ink cartridges and carriage are your main concern, as most other residue is normal build-up for this device.
  • When cleaning your printer, do not use alcohol or other platen cleaners, as this could severely damage your device.

One you are able to access the interior (with the help of the General Disassembly Guide, there may be an amount of ink residue that builds up inside the device, so be thorough when sterilizing your printer.

However, regarding general maintenance, the ink cartridges and carriage are your main concern, as most other residue is normal build-up for this device.

When cleaning your printer, do not use alcohol or other platen cleaners, as this could severely damage your device.

Step 10

  • To maintain the ink cartridges, you simply wipe them down with a soft, clean cloth.
  • However, if you find the dried ink stains disconcerting, know that they are character of a healthy, functioning device. You can still wipe them off, but be cautious not to rub too hard- you risk denting or otherwise damaging the machine.

To maintain the ink cartridges, you simply wipe them down with a soft, clean cloth.

However, if you find the dried ink stains disconcerting, know that they are character of a healthy, functioning device. You can still wipe them off, but be cautious not to rub too hard- you risk denting or otherwise damaging the machine.

Step 11

  • If you have further questions about extended care for your device, you may find this, this, and this to be helpful.

If you have further questions about extended care for your device, you may find this, this, and this to be helpful.

To reassemble your device, follow these instructions in reverse order.

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