8.Close the ADF hatch, and then reconnect the USB cable and power cable to the scanner.

9.Press the Power switch to the on position, and then update the scanner maintenance history:

a. Press the Tools () button on the scanner front panel to open on the HP Scanner Tools Utility. Click the Maintenance tab.

b. In the Feeder Maintenance section, click Record Cleaning. For more information, see the HP Scanner Tools Utility help.

Replace the feed roller and separation pad

Replace the feed roller under either of the following conditions:

Streaks on scans or paper jams occur repeatedly and cleaning the scanner does not help.

The Feed Roller and Separation Pad Maintenance section of the HP Scanner Tools Utility Maintenance tab indicates that maintenance is due.

The feed roller replacement kit contains a feed roller, separation pads, and installation instructions. To order the replacement kit, go to www.hp.com/support.

To replace the feed roller and separation pad, follow these steps:

1.Press the Power switch to the off position, and then disconnect the USB cable and power cable from the scanner.

2.Open the ADF hatch, and then replace the feed roller and separation pad as described in the installation instructions that were included with the replacement kit.

NOTE: The feed roller replacement kit includes extra separation pads. If the separation pad shows wear between feed roller replacements, then replace the separation pad as described in the installation instructions that were included with the replacement kit.

3.Close the ADF hatch, and then reconnect the USB cable and power cable to the scanner.

4.Press the Power switch to the on position, and then update the scanner maintenance history:

a. Press the Tools () button on the scanner front panel to open on the HP Scanner Tools Utility. Click the Maintenance tab.

b. In the Feed Roller and Separation Pad Maintenance section, click Record Replacement.

For more information, see the HP Scanner Tools Utility help.

Remove the automatic document feeder from the scanner

If you need to remove the automatic document feeder (ADF) from the scanner, follow these steps:

1.Turn the thumbscrews on the connector until they are loose. Disconnect the accessory cable from the accessory cable port on the scanner.

2.Remove the ADF input tray.

Remove the automatic document feeder from the scanner

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HP N8400 manual Remove the automatic document feeder from the scanner, Replace the feed roller and separation pad