AGFA Avantra 36/44 Service Manual page 144

These Default Correction Tables, with the Density Variation and Linearity files, con-
tain all the information to make up the Correction Table for each of the Avantra sys-
tems.
Manufacturing runs two files (a "Density Variation" file and a "Scale" file) which
merge with the "Default Correction Table" file to create the unique "Correction
Table" for that system. To merge the "DQ" and "L" files to the Default Correction
Table, use a program in the "Correction Utility" disk.
There are four "DQ" files (one for each resolution) and two "L" files that make up
the "DQ" and "L" tables. These files are shipped with each system in the system dis-
kette along with the Correction Table file for that system.
When a new carriage assembly is shipped a diskette is included, containing a new
correction table for that carriage. This Correction Table is loaded down to the sys-
tem after a new carriage assembly is installed. That new carriage system diskette
also includes the new "DQ" and "L" files for that carriage.
If the correction table on the disk becomes corrupted you can use the "DQ" and "L"
files to make up another Correction Table. Also, if there is a problem with the lin-
earity you can send back a "scale" file with the appropriate parameters set so that
we can measure it and send you back a new diskette with just the new "L" files.
This is usually done when a spin motor is replaced.
It is very important that when a carriage assembly is replaced that the new Correc-
tion Table plus the "DQ" and "L" files are replaced on the original system diskette.
The same is true if just new "L" files are sent to correct Linearity problems. The new
correction table that was made with the new "L" files should be copied to the orig-
inal system diskette.
Creating a New Correction Table
To create a new Correction Table you must have certain software programmed into
your PC. The new Correction Table is built in your PC and must be merged with
the correct "DSP" main program and downloaded to the Avantra. The following
programs must be loaded in your PC before creating a new Correction Table:
• The latest version of the Correction Utility program.
• The Default Correction Table for that system.
• The new "DQ" and "L" files on floppy disk. The file names must include
the system serial number.
• The "DSP" Main program for that system.
NOTE:
You must rename the "DQ" & "L" files with the system serial
number. If this isn't done the Correction Utility will still cre-
ate a Correction Table but without the new "DQ" & "L" files.
If the system serial number is 222 then an example of a
renamed "DQ" & "L" file is (DQ00222H.001) and
(L00222H.003). The serial number must be five digits,
include leading zeros if necessary.
Section I: Imagesetter
Diagnostics 3-57