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Repairing HP Deskjet 6840 Rubber Paper Feed Rollers

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  1. Repairing HP Deskjet 6840 Rubber Paper Feed Rollers, General Device: crwdns2935265:01crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Start by turning the printer around so you can work on the backside of the printer.

  2. Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:02crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:02crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:02crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Use both hands to press the two grooves on the back of the printer. Simultaneously press both grooves down and in.

    • This will release the back panel from the printer.

    • Remove the back panel from the printer.

  3. Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:03crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:03crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:03crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Use a screwdriver to remove each visible screw.

    • Using two hands, pull out and remove the rear support structure.

  4. Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:04crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:04crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Carefully remove the large, black shell that encases the internal body of your printer.

    • Gently remove the shell from the base of the printer by placing your hands at the corners and firmly lifting the shell until it pops off of the base. Do not pry or bend the shell.

    • Carefully detach wires that connect the shell to the printer's internal parts.

  5. Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:05crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:05crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:05crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Use a screwdriver to remove the screws from the printer carriage assembly and the green plastic motherboard.

    • Gently loosen the motherboard from its base, but do not fully remove it.

  6. Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:06crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:06crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:06crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Use a screwdriver to remove the screws securing the motor carriage.

    • If you need to replace the motor, remove the screws from the motor housing.

    • Carefully lift the motor out of the housing with your fingers and replace it with a new one.

  7. Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:07crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:07crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:07crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • By now, your printer should resemble the one in the photograph.

    • Use the screwdriver to remove any remaining screws.

  8. Repairing HP Deskjet 6840 Rubber Paper Feed Rollers, Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:08crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Repairing HP Deskjet 6840 Rubber Paper Feed Rollers, Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:08crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Once you have removed the device top case using the General Device Disassembly Guide, you can access the rubber paper rollers. located near the front, holding the silver bar in place.

    • They are located near the front, holding the silver bar in place.

  9. Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:09crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • If the rubber paper rollers are causing the problem, you’ll notice that pressing the Resume button does not spin the metal bar held by the rollers.

    • Remove the roller assembly from the printer case.

    • Firmly grip one of the end rubber rollers (or use pliers) and twist it. This should rotate the metal bar and release any paper debris that is preventing the printer from functioning properly.

  10. Repairing HP Deskjet 6840 Rubber Paper Feed Rollers: crwdns2935265:010crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • If grinding the gears of the rubber paper rollers didn’t fix your printing problem, the following instructions may help—see Step Two below. Step Two

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

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Magnolia

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NMSU-SHEPPARD-S14S1G5

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