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NovaJet 500/630/700 Series Service Manual
MAINTENANCE
Maintenance 3-29
6. Continue until all six calibrations on the Color Calib Menu have
been accomplished.
Deadband Alignments
Deadband calibration compensates for minute differences created when
bidirectional printing is used. Unidirectional printing is not affected by
deadband. There are four types of deadband tests:
Deadband
Slow Deadband
All Lines Tests
Single Line Test
Figure 3-23. Slow Deadband.
Figure 3-22 shows what the display will look like when printing the
slow deadband test if it is out of alignment. A correctly aligned printer
will appear as if there is only a series of vertical lines printed. No
difference between the top and bottom set of lines to the center set of
lines would be appearant.
The SLOW DEADBAND calibration is a precision test that checks the
firing time of the jets as related to the forward and reverse direction.
Allowable values for the Slow Deadband calibration is -2, -1, 0, 1 and 2.
The Single Line Test and All Line Test are variations of the deadband
test except they print longer lines so that long time integration of the
deadband calibration can be observed. The Single Line Test prints only
one line at a time while the All Line Test prints all lines at the same
time. These tests were designed primarily to be used in manufactoring
only.
The deadband test on a NovaJet 500 series printer will look like the
display in Figure 3-22 and the procedures to adjust the values are in the
following section.