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Service Calibrations
5-3
HP DesignJet 430, 450C and 455CA Printers
Before Performing the Accuracy Calibration
1 Under normal environmental conditions and on HP Matte Film D/A1Ćsize
media, plot a drawing that contains two X" marks nominally positioned
500 mm (19.69 in.) apart.
2 Measure the distance between the centers of the X" marks on the plot.
Accuracy calibration is needed if this distance is not 500 mm (19.69 in)
1 mm (0.04 in).
If the measured accuracy, media thickness, or environmental conditions
vary greatly from the factory standards, recalibrate the Printer by
continuing with the following procedure.
Performing the Accuracy Calibration
1 Place a sheet of HP Matte Film over the top of the Printer for 10 minutes
to let the sheet stabilize to the environmental conditions.
Use a sheet of approximate size A1 or D.
You must use HP Matte Film.
Otherwise the optical sensor on the
carriage will be calibrated incorrectly, and the Printer will have
problems loading some types of media.
2 Enter into Service Mode 2, by powering ON the Printer while holding
down the Media Source key.
3 Set the Media Type on the front panel to Coated Paper.
4 Load the film, with the matte (dull) side down, in portrait orientation into
the Printer.
5 When the Ready LED lights up, press Reprint key
.
The Ready LED begins to flash and the Printer takes several minutes to
plot the calibration plot (see Figure 1). The Printer ejects the sheet, and the
Load Media LED lights up.
6 Unload the sheet.
7 Wait until the ink on the sheet is dry.
8 Cut the sheet along the dotted line and reload the sheet facedown into
the Printer, in the direction indicated by the arrows on the calibration plot
(see Figure 2).
The Ready LED begins to flash. The Printer takes less than 10
minutes to: read the calibration sheet; calculate the calibration data;
save the data in the EEROM; and eject the sheet.
9 Unload the sheet.