NOTE: Pristine PRNU is the white balance calibration that is done in the factory in clean conditions, just after
removing all protective lms. Under such conditions, PRNU calibration is the best quality possible and is used
for reference to detect dust in the scanner and component degradation.
7.5 Scanner save calibrations
This needs to be conducted when synchronization between the Main PCA and Scan Bundle Board is required.
Possible scenarios are:
1. Scanbar replacement.
2. Calibration surfaces replacement.
3. Main PCA replacement.
4. Scan Bundle board replacement.
7.6 Scanner Analog Encoder calibration
Needs to be run when the scanner OPT wheel is replaced in the eld. Run this operation on the rst boot up
after the OPT wheel is replaced.
ENWW 7. Scanner diagnostics (included only in Extended Support Menu) 221
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