HP LaserJet M4345 Multifunction Printer series - Manual (Page 178)

Calibrate the scanner
Calibrate the scanner to compensate for offsets in the scanner imaging system (carriage head) for
ADF and flatbed scans. Because of mechanical tolerances, the scanner's carriage head might not
read the position of the image accurately. During the calibration procedure, scanner offset values are
calculated and stored. The offset values are then used when producing scans so that the correct
portion of the document is captured.
Scanner calibration should be carried out only if you notice offset problems with the scanned images.
The scanner is calibrated before it leaves the factory. It needs to be calibrated again only rarely.
1. From the Home screen, touch Administration .
2. Touch Troubleshooting .
3. Touch Calibrate Scanner and then follow the instructions in the onscreen dialog box.
The device starts the calibration process, and Calibrating appears on the touchscreen status
line until the process is complete.
166 Chapter 10 Manage and maintain the device ENWW