HP Color LaserJet 2840 User Manual

Changing the automatic document feeder (ADF)
If the ADF is damaged or not working, you can replace it. For information about ordering
supplies, see 
Accessories and ordering information.
To change the ADF
1. At the device, open the ADF cover.
2. Disconnect the connector by squeezing the tabs together and lifting upward.
3. Remove the ADF by lifting it upward and tilting it forward as the hinges nearly disconnect
from the device.
4. On the new ADF, unfold the hinges.
ENWW Changing the automatic document...

5. Insert the hinges on the new ADF so that they are slightly tilted forward, and then push
straight down into the device.
6. Insert the connector by pushing down on it until it clicks into place.
196Chapter 12 Managing the device and maintenance ENWW
 

Changing the automatic document feeder (ADF) pickup roller
assembly
To change the ADF pickup roller assembly
If your automatic document feeder (ADF) has trouble feeding paper, you can replace the
ADF pickup roller assembly. See 
Accessories and ordering information to order an ADF
pickup roller assembly. To remove the existing assembly, use the following procedure:
1. Turn off the device and unplug the power cord.
2. Open the automatic document feeder (ADF) cover.
3. Press the round green button while...

5. Lower the green lever with the flat green part fitting in between the rollers. Press down
on the green lever until you hear a snap.
6. To check for proper installation, lift the green lever until it remains open. The new pickup
roller assembly should be secured to the lever assembly and should not fall out.
7. Make sure that both sides of the assembly are secured by the green hooks.
8. Lower the green lever assembly and close the automatic document feeder (ADF) lid.
NoteIf you are experiencing jams in...

Cleaning the automatic document feeder (ADF) pickup roller
assembly
To clean the ADF pickup roller assembly
If your automatic document feeder (ADF) has trouble feeding paper, you can clean the ADF
pickup roller assembly. To clean the assembly, use the following procedure:
1. Turn off the device and unplug the power cord.
2. Open the automatic document feeder (ADF) cover.
3. Press the round green button while lifting the green lever. Rotate the green lever until it
stops in the open position. The pickup...

6. Lower the green lever with the flat green part fitting in between the rollers. Press down
on the green lever until you hear a snap.
7. To check for proper installation, lift the green lever until it remains open. The pickup
roller assembly should be secured to the lever assembly and should not fall out.
8. Make sure that both sides of the assembly are secured by the green hooks.
9. Lower the green lever assembly and close the ADF lid.
NoteIf you are experiencing jams in the ADF, contact your local...

13
Managing supplies
This chapter contains information about these maintenance topics:
●
Checking status and ordering supplies
●
Storing supplies
●
Replacing and recycling supplies
●
HP policy on non-HP supplies
●
HP fraud hotline
●
Changing a print cartridge
●
Changing the imaging drum
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Checking status and ordering supplies
You can check the supplies status by using the printer control panel, printing a Supplies
Status page, or viewing the HP Toolbox. Hewlett-Packard recommends that you place an
order for a replacement print cartridge when you first receive the Low message for a print
cartridge. When you use a new, authentic HP print cartridge or imaging drum, you can obtain
the following types of supplies information:
●amount of cartridge or drum life remaining
●estimated number of...

Storing supplies
Follow these guidelines for storing print cartridges and the imaging drum:
●Do not remove the print cartridge or imaging drum from its package until you are ready
to use it.
CAUTION
To prevent damage, do not expose the print cartridge or imaging drum to light for more than
a few minutes.
●See 
Environmental specifications for operating and storage temperature ranges.
●Store the supply in a horizontal position.
●Store the supply in a dark, dry location away from heat and magnetic...

Replacing and recycling supplies
To install a new HP print cartridge or imaging drum, follow the instructions that are included
in the box that contains the new supply, or see the getting started guide.
To recycle supplies, place the used supply in the box in which the new supply arrived. Use
the enclosed return label to send the used supply to HP for recycling. For complete
information, see the recycling guide that is included with each new HP supply item. See
HP LaserJet printing supplies for more...