AGFA d-lab.3 Digital Compact Lab

Printer
Repair
There are 2 methods to set the pixel coverage of
the 3 colours in Fast Scan direction:
1. Approximate, pixelwise shift by means of the
Pixel delay
2. Fine shift of the colours with respect to each
other with the Pixel shift in 1 / 8 pixel steps
Pixels can only be shifted to the left.
The pixel at the far left serves as reference for the
adjustment and the other pixels are shifted to the
left.
− Print the test print TESTPRINT01.ARP
− Assess the print, check pixel coverage faults
− Set the pixel shift or delay
− Repeat these adjustments until all 3 colours are
centred on each other.
Pixel Delay
Increasing the value of one colour will shift the
output of this colour to the left (holding up the
beginning of the print). Values between 0 and 15
are admissible.
Pixel Shift
The position of the colours Red, Green, Blue are
described by a sequence of 4 cyclically connected
ones and zeros. If one colour is to be shifted to the
left by 1 / 8 pixel, the ones and the zeros must be
moved to the right.
The 8 values to be entered in the pixel shift are
calculated by adding the 3-Bit combination of
the three colours.
The colours are shifted by shifting the ones to the
right. The ones that are pushed out on the right side
are added again on the left side (cyclical rotation).
There are always 4 ones or 4 zeros together. 7 / 8
pixels at max. can be shifted to the left.
If 8 / 8 pixels are shifted, the initial status is obtained
again.
Starting position (presetting):
R: 0 0 0 0 1 1 1 1 (2 0 )
G: 0 0 0 0 1 1 1 1 (2 1 )
B: 0 0 0 0 1 1 1 1 (2 2 )
Entry: 0 0 0 0 7 7 7 7
6.3.62 2001-01-02 /PN 9009 AGFA d-lab.3