5. Line Sensor Calibration

The purpose of this Service Calibration is to calibrate the intensity of the line sensor in the Carriage PCA. An incorrect calibration can result in edge-detection failures during media loading and incorrect reading of prints that are used for alignment or calibration.

Perform the Line Sensor Calibration whenever:

Edge detect procedure fails during media loading.

Carriage is disassembled or replaced.

Line Sensor is disassembled or replaced.

Banding is detected in prints.

Misalignment between colors is detected.

Perform the Line Sensor Calibration as follows:

Make sure you load one of the following media into the Printer before performing this calibration:

» HP Bond Paper.
» HP Glossy Media.
» HP Coated Paper.
» HP Productivity Photo Gloss.
» HP Heavyweight Coated Paper.
» HP Super Heavyweight Coated Paper.
» HP Bright White Inkjet Paper.

1. In the Service Calibrations submenu, scroll to "Line Sensor Calibration" and press Enter.

2. When the following message appears on the front panel, you must select whether you would like to continue with the calibration by pressing the Enter key. Press Back or Cancel to exit the calibration.

3. If media is not loaded, the following message appears on the front panel. Load media in to the Printer and start again from step 1.

Before continuing, the Printer will check the following:

» The Media Lever is in the lowered position.
» The correct paper type is loaded (check list on previous page).
» The correct paper size (minimum paper size 24 inches).

If these conditions are not met, a warning will be displayed on the Front Panel and you will need to restart the Calibration from step 1.

Make sure you keep your hands away from the Print Platen as the Carriage will be moving at high speed and you could injure yourself or damage the Carriage Assembly.

4. The Printer will start to calibrate the Line Sensor. Once the Line Sensor has been calibrated, the results will be displayed on the Front Panel. Press Enter to continue or press Back or Cancel to exit the calibration.

If the values are not within the range specified, an error will appear on the Front Panel. In this case, try the following:

» Try the Scan-Axis Calibration again.
» Replace the Line Sensor.

5. The Printer will start to calibrate the Line Sensor position to the Black Printhead. It will print a line of black dots and then scan them:

6. Once the Line Sensor has been calibrated, the results will be displayed on the Front Panel. Press Enter to finish the calibration or press Back or Cancel to exit the calibration.

7. The Printer will now perform the Printhead Alignment. When the following message appears on the front panel, you must select whether you would like to continue with the calibration by pressing the Enter key. Press Back or Cancel to exit the calibration.

8. Once the Printhead Alignment is completed, the following message will be displayed on the Front Panel. Press the Enter key to continue.

If the Printhead Alignment fails for any reason, a warning message will appear on the Front Panel. In this case, try the following:

» Enter the Front Panel menu and retry the Printhead Alignment. If the Alignment completes successfully, then perform the Color Calibration.
» If the Alignment fails again, check the Alignment pattern to se if any of the Printheads are printing incorrectly. If necessary, perform a Printhead Recovery through the Front Panel and retry the Printhead Alignment.

9. The Printer will now perform the Color Calibration. When the following message appears on the front panel, you must select whether you would like to continue with the calibration by pressing the Enter key. Press Back or Cancel to exit the calibration.

10. Once the Color Calibration is completed, the following message will be displayed on the Front Panel. Press the Enter key to continue.

If the Color Calibration fails for any reason, a warning message will appear on the Front Panel. In this case, try the following:

» Enter the Front Panel menu and retry the Color calibration.
» If the Calibration fails again, check the Calibration pattern to see if any of the Printheads are printing incorrectly. If necessary, perform a Printhead Recovery through the Front Panel and retry the Calibration.

11. Once the complete Line Sensor calibration is completed successfully, OK will be displayed on the Front Panel.