5-16
Service Calibrations
HP Designjet 4000/4020 Printer Series Service Manual
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:
îš„ Edge detect procedure fails during media loading.
îš„ Carriage is disassembled or replaced.
îš„ Line Sensor is disassembled or replaced.
îš„ Banding is detected in prints.
îš„ 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:
îš„ HP Bond Paper.
îš„ HP Glossy Media.
îš„ HP Coated Paper.
îš„ HP Productivity Photo Gloss.
îš„ HP Heavyweight Coated Paper.
îš„ HP Super Heavyweight Coated Paper.
îš„ 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.
Press Cancel
or the
Back key
Press Enter
to Exit
to proceed
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